The costs and benefits of senotherapeutics for human health
Open accessAbstract
Cellular senescence is a major contributor to age-related diseases in humans; however, it also has a beneficial role in physiological and pathological processes, including wound healing, host immunity, and tumour suppression. Reducing the burden of cell senescence in animal models of cardiometabolic disorders, inflammatory conditions, neurodegenerative diseases, and cancer using pharmaceutical approaches that selectively target senescent cells (ie, senolytics) or that suppress senescence-associated secretory phenotype (ie, senomorphics) holds great promise for the management of chronic age-associated conditions. Although studies have provided evidence that senolytics or senomorphics are effective at decreasing the number of senescent cells in humans, the short-term and long-term side-effects of these therapies are largely unknown. In this Review, we systematically discuss the senolytics and senomorphics that have been investigated in clinical trials or have been used off-label, presenting their various adverse effects. Despite the potential of senotherapeutics to transform anti-ageing medicine, a cautionary approach regarding unwanted dose-dependent side-effects should be adopted.
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Written from the paper’s full text.
TL;DR
This review argues that senotherapeutics (senolytics and senomorphics) show promise for age-related diseases in preclinical models and some early human trials, but human efficacy and safety data remain sparse. It catalogues organ-specific benefits and adverse effects, cautioning that dose-dependent side-effects and unstandardised protocols limit clinical translation.
Key findings
- Early human senolytic trials show target engagement: in seven patients with diabetic kidney disease, once-daily oral dasatinib (100 mg) plus quercetin (1000 mg) for 3 days reduced senescent-cell burden in adipose tissue within 11 days; another pilot reduced p16INK4a-positive cells by 38% and p21CIP1-positive cells by 30% in skin and adipose tissue.
- In a phase 1 study of UBX1325 in 12 patients with diabetic macular oedema or age-related macular degeneration, there were no dose-limiting toxicities and two non-serious adverse events unrelated to the drug; six high-dose patients gained best corrected visual acuity at 2 weeks, six of 12 had decreased central subfield thickness, and three of four patients with wet age-related macular degeneration improved.
- In 14 patients with idiopathic pulmonary fibrosis, intermittent dasatinib (100 mg/day) plus quercetin (1250 mg/day) for 3 days per week over 3 weeks was tolerable and improved 6-min walk distance and 4-m gait speed, but pulmonary function, circulating senescence/profibrotic markers, frailty index scores, and reported health were unchanged.
- Adverse or divergent effects include ABT263 reducing trabecular bone volume fraction by 60.1% in female and 45.6% in male aged mice and impairing osteoblast mineralised matrix production by 88% in females and 83% in males; Bcl-xL inhibitors induced thrombocytopenia/thrombocytopathy; and UBX0101 failed a phase 2 trial in knee osteoarthritis.
Methods
- Design: a Review, described by the authors as systematically discussing senolytics and senomorphics investigated in clinical trials or used off-label, broken down by physiological function and organ system in patients and murine models.
- Data: PubMed searched June 23–Aug 31, 2021, using MeSH and free-text terms including “senolytics” OR “cellular senescence” and specific combinations; ClinicalTrials.gov searched Aug 25–Nov 8, 2021, using senolytic names AND “senescence” OR “senolytic” OR “aging”; no language, date, or publication-status restriction.
- Analysis: narrative synthesis of preclinical and clinical evidence, including a table of clinical trials; no meta-analysis or formal quantitative pooling is described.
Limitations
- Stated: short-term and long-term side-effects of senotherapeutics are largely unknown; there is a paucity of efficacy and safety data from clinical trials; standardised guidelines for timing, dose, and route of administration are absent; and peripheral tissues are incompletely functionally characterised after systemic administration.
- Stated: findings are discordant across models—for example, dasatinib plus quercetin has not always been efficacious in metabolic disease, and ABT263 has shown both beneficial and detrimental bone effects—so long-term monitoring and randomised controlled trials are needed.
- Evident from the text: many conclusions rely on murine models, while human evidence often comes from small, open-label, single-arm pilot studies; the literature search was limited to PubMed and ClinicalTrials.gov over defined 2021 windows, and no formal risk-of-bias assessment or meta-analysis is described.
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Cites
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Claims the paper makes
0 of 121 cited sources checked · 0 supported · 0 flagged
- Findingnone given
Several pilot studies in humans testing senolytics in recipients of haematopoietic stem-cell transplantation, patients with age-related osteoporosis, and patients with osteoarthritis are currently recruiting or ongoing.
“Nevertheless, several pilot studies in humans testing the potential beneficial effects of senolytics in recipients of haematopoietic stem-cell transplantation, patients with age-related osteoporosis, and patients with osteoarthritis are currently recruiting or ongoing (table).”
Quote in the paperNot a substantial claim - Findingnone given
To date, only a few studies have investigated use of senotherapeutics in the kidney.
“However, to date, only a few studies have investigated use of these drugs.”
Quote in the paperNot a substantial claim - Premisecitation
Elimination of senescent cells seemed to be largely beneficial.
“The body of evidence showing that elimination of senescent cells seemed to be largely beneficial 6,7 led to huge research efforts to identify novel agents that eliminate senescent cells in humans.”
Quote in the paperSubstantial claim0 of 2 sources checked - Interpretationreasoning
The full potential of senotherapeutics has been hampered in clinical applications.
“Therefore, the full potential of senotherapeutics has been hampered in clinical applications.”
Quote in the paperSubstantial claim - Premisecitation
Studies have provided evidence that senolytics or senomorphics are effective at decreasing the number of senescent cells in humans.
“Although studies have provided evidence that senolytics or senomorphics are effective at decreasing the number of senescent cells in humans, the short-term and long-term side-effects of these therapies are largely unknown.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [46] Hickson, 2020, Corrigendum to ‘Senolytics decrease senescent cells in humans: preliminary report from a clinical trial of dasatinib plus quercetin in individuals with diabetic kidney disease’ EBioMedicine 47 (2019) 446–456, EBioMedicine source
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- Premisecitation
SASP contributes to persistent chronic inflammation (known as inflammaging).
“Furthermore, SASP contributes to persistent chronic inflammation (known as inflammaging).5”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [5] Franceschi, 2014, Chronic inflammation (inflammaging) and its potential contribution to age-associated diseases, J Gerontol A Biol Sci Med Sci source
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- Interpretationnone given
The short-term and long-term side-effects of senolytics or senomorphics are largely unknown.
“Although studies have provided evidence that senolytics or senomorphics are effective at decreasing the number of senescent cells in humans, the short-term and long-term side-effects of these therapies are largely unknown.”
Quote in the paperSubstantial claim - Premisecitation
It can take up to 6 weeks for a cell to become fully senescent.
“Conveniently, because there is evidence that it can take up to 6 weeks for a cell to become fully senescent, 10 therapies with senolytics can be planned with a so-called hit-and-run approach, which involves intermittent administration of the drug.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [10] Kirkland, 2020, Senolytic drugs: from discovery to translation, J Intern Med source
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- Premisecitation
Six patients who received high doses of UBX1325 had a gain in best corrected visual acuity at 2 weeks.
“Additionally, six patients who received high doses had a gain in best corrected visual acuity at 2 weeks.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [47]
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- Premisecitation
Senotherapy has proven to be effective in a rat model of Duchenne muscular dystrophy.
“Senotherapy has also proven to be effective in a rat model of Duchenne muscular dystrophy, 29 a progressive disease characterised by chronic muscle degeneration and inflammation.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [29] Sugihara, 2020, Cellular senescence-mediated exacerbation of Duchenne muscular dystrophy, Sci Rep source
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- Premisecitation
Administration of dasatinib and quercetin in a murine model of irradiation-induced senescence ameliorated muscle function.
“A study showed that administration of dasatinib and quercetin in a murine model of irradiation-induced senescence ameliorated muscle function.28”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [28] Zhu, 2015, The Achilles' heel of senescent cells: from transcriptome to senolytic drugs, Aging Cell source
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- Premisecitation
The role of senescent cells in skin function is complex because they seem to have both beneficial and detrimental effects, depending on the context.
“However, the role of senescent cells in skin function is complex because they seem to have both beneficial and detrimental effects, depending on the context.57”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [57] Demaria, 2015, Cell Autonomous and non-autonomous effects of senescent cells in the skin, J Invest Dermatol source
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- Premisecitation
Renal and cardiac functions were improved after administration of senotherapeutics.
“Concurrently, renal and cardiac functions were improved after administration of senotherapeutics.20”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [20] Palmer, 2019, Targeting senescent cells alleviates obesity-induced metabolic dysfunction, Aging Cell source
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- Premisenone given
The effects of senolytic therapy in the context of age-associated functional decline of skeletal muscle and sarcopenia in humans have not yet been investigated.
“The effects of senolytic therapy in the context of age-associated functional decline of skeletal muscle and sarcopenia in humans have not yet been investigated.”
Quote in the paperNot a substantial claim - Premisecitation
Treatment of human adipose tissue biopsies with dasatinib (1 μmol/L) and quercetin (20 μmol/L) decreased senescence-associated β-galactosidase activity in subcutaneous tissue and omental adipose tissue.
“A subset of human adipose tissue biopsies was then treated with a cocktail of dasatinib (1 µmol/L) and quercetin (20 µmol/L), which decreased senescenceassociated β-galactosidase activity in subcutaneous tissue and omental adipose tissue.45”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [45] Rouault, 2021, Senescence-associated β-galactosidase in subcutaneous adipose tissue associates with altered glycaemic status and truncal fat in severe obesity, Diabetologia source
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- Premisecitation
In a small, open-label, phase 1 pilot study of seven patients with diabetic kidney disease, once daily oral dasatinib (100 mg) and quercetin (1000 mg) for 3 days significantly reduced the burden of senescent cells in adipose tissue within 11 days.
“In a small, openlabel, phase 1 pilot study of seven patients with diabetic kidney disease, administration of once daily oral dasatinib (100 mg) and quercetin (1000 mg) for 3 days, which have elimination half-lives of up to 11 h, significantly reduced the burden of senescent cells in adipose tissue within 11 days.46”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [46] Hickson, 2020, Corrigendum to ‘Senolytics decrease senescent cells in humans: preliminary report from a clinical trial of dasatinib plus quercetin in individuals with diabetic kidney disease’ EBioMedicine 47 (2019) 446–456, EBioMedicine source
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- Premisecitation
The concentration of activin A increased with age in the adipose tissue of mice.
“The researchers also observed that the concentration of activin A increased with age in the adipose tissue of mice.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [44] Zaragosi, 2010, Activin a plays a critical role in proliferation and differentiation of human adipose progenitors, Diabetes source
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- Premisecitation
These differences were maintained for 7 months following treatment.
“These differences were maintained for 7 months following treatment.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [28] Zhu, 2015, The Achilles' heel of senescent cells: from transcriptome to senolytic drugs, Aging Cell source
Not checked in the free run.
- Premisecitation
In an open-label phase 1 pilot study, administration of once daily oral dasatinib (100 mg) and quercetin (1000 mg) for 3 days reduced p16INK4a-positive cells by 38% and p21CIP1-positive cells by 30% in the epidermal layer of the skin and adipose tissues.
“In an open-label phase 1 pilot study, 46 administration of once daily oral dasatinib (100 mg) and quercetin (1000 mg) for 3 days was shown to reduce p16INK4a-positive cells by 38% and p21CIP1-positive cells by 30% in the epidermal layer of the skin and adipose tissues.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [46] Hickson, 2020, Corrigendum to ‘Senolytics decrease senescent cells in humans: preliminary report from a clinical trial of dasatinib plus quercetin in individuals with diabetic kidney disease’ EBioMedicine 47 (2019) 446–456, EBioMedicine source
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- Premisecitation
Interleukin (IL)-6 and IL-8, the most common cytokines associated with SASP, are elevated in the bronchoalveolar lavage of patients aged 65 years and older.
“In particular, interleukin (IL)-6 and IL-8, the most common cytokines associated with SASP, are elevated in the bronchoalveolar lavage of patients aged 65 years and older.82”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [82] Meyer, 1996, Immune dysregulation in the aging human lung, Am J Respir Crit Care Med source
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- Premisecitation
Other senotherapeutics belonging to the cardiac glycoside family resulted in effective elimination of senescence-induced lung fibrosis in female immunodeficient NMRI nude mice aged 8 weeks.
“Interestingly, data show that other senotherapeutics, belonging to the cardiac glycoside family, resulted in effective elimination of senescenceinduced lung fibrosis in female immunodeficient NMRI nude mice (a mouse model named after the Naval Medical Research Institute) aged 8 weeks.38”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [38] Triana-Martínez, 2019, Identification and characterization of cardiac glycosides as senolytic compounds, Nat Commun source
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- Premisecitation
Data show that various parts of the brain in patients with neurodegenerative diseases are characterised by increased expression of senescence markers.
“Data have shown that various parts of the brain in patients with neurodegenerative diseases are characterised by increased expression of senescence markers.70”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [70] Tan, 2014, Are there roles for brain cell senescence in aging and neurodegenerative disorders?, Biogerontology source
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- Premisecitation
The increased burden of senescent cells, together with the release of inflammatory cytokines associated with SASP, contribute to chronic inflammation in the lung.
“The increased burden of senescent cells, together with the release of inflammatory cytokines associated with SASP, contribute to chronic inflammation in the lung.81”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [81] Meyer, 1996, Immune dysregulation in the aging human lung, Am J Respir Crit Care Med source
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- Premisecitation
An extract from the plant Solidago virgaurea alpestris exhibited weak senolytic activity in fibroblasts and keratinocytes isolated from skin biopsies of healthy adult donors.
“Lämmermann and colleagues 60 identified an extract from the plant Solidago virgaurea alpestris, which exhibited weak senolytic activity in fibroblasts and keratinocytes isolated from skin biopsies of healthy adult donors.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [60] Lämmermann, 2018, Blocking negative effects of senescence in human skin fibroblasts with a plant extract, NPJ Aging Mech Dis source
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- Premisecitation
In a mouse model, dasatinib prevented glaucoma-dependent loss of retinal functions and cellular structure.
“Although a study in a mouse model showed that dasatinib prevented glaucoma-dependent loss of retinal functions and cellular structure, 41 a retrospective study assessing the effects of senolytic drugs on vision in 28 patients with glaucoma showed that senolytic exposure did not affect visual acuity or intraocular pressure, and did not have toxic effects.74”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [41] Rocha, 2020, Early removal of senescent cells protects retinal ganglion cells loss in experimental ocular hypertension, Aging Cell source
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- Premisecitation
COVID-19 survivors are susceptible to developing pulmonary fibrosis-like symptoms.
“Similarly, COVID-19 survivors are susceptible to developing pulmonary fibrosis-like symptoms.87,88”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [87] Esposito, 2020, Increased odds of death for patients with interstitial lung disease and covid-19: a case-control study, Am J Respir Crit Care Med source
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- cites [88] John, 2021, COVID-19 and pulmonary fibrosis: a potential role for lung epithelial cells and fibroblasts, Immunol Rev source
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- Premisecitation
Patients with idiopathic pulmonary fibrosis are extremely susceptible to developing COVID-19 after infection with SARS-CoV-2.
“Patients with idiopathic pulmonary fibrosis are extremely susceptible to developing COVID-19 after infection with SARS-CoV-2.87,88”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [87] Esposito, 2020, Increased odds of death for patients with interstitial lung disease and covid-19: a case-control study, Am J Respir Crit Care Med source
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- cites [88] John, 2021, COVID-19 and pulmonary fibrosis: a potential role for lung epithelial cells and fibroblasts, Immunol Rev source
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- Premisecitation
The senescent fibroblast secretome is linked to fibrogenic activity in a mouse model of idiopathic pulmonary fibrosis induced by bleomycin.
“A study linked the senescent fibroblast secretome to fibrogenic activity in a mouse model of idiopathic pulmonary fibrosis, a fatal disease characterised by interstitial remodelling and compromised lung function, induced by administration of bleomycin.37”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [37] Schafer, 2017, Cellular senescence mediates fibrotic pulmonary disease, Nat Commun source
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- Study design and conductcitation
This mouse study did not analyse lung function.
“This mouse study did not analyse lung function.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [15] Camell, 2021, Senolytics reduce coronavirus-related mortality in old mice, Science source
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- Premisecitation
After ischaemia-reperfusion injury in a murine model, nuclear p21 cip1 was localised in proximal and distal nephrons, but not in the glomerular area.
“In another murine model, after ischaemia-reperfusion injury, nuclear p21 cip1 (CDK-interacting protein 1) was localised in proximal and distal nephrons, but not in the glomerular area.101”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [101] Megyesi, 2001, Positive effect of the induction of p21WAF1/CIP1 on the course of ischemic acute renal failure, Kidney Int source
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- Premisecitation
He and colleagues devised a proteolysis-targeting chimera technology to reduce the platelet toxicity of ABT263 by converting it into PZ15227.
“He and colleagues 34 devised a proteolysistargeting chimera technology to reduce the platelet toxicity of ABT263 by converting it into PZ15227.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [34] He, 2020, Using proteolysis-targeting chimera technology to reduce navitoclax platelet toxicity and improve its senolytic activity, Nat Commun
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- Premisecitation
Senescence occurred in proximal tubular epithelial cells with increasing age in the INK-ATTAC mouse model.
“The researchers showed that senescence occurred in proximal tubular epithelial cells with increasing age.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [6] Baker, 2016, Naturally occurring p16(Ink4a)-positive cells shorten healthy lifespan, Nature source
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- Interpretationreasoning
The safety profile and efficacy of senotherapeutics in patients are yet to be fully investigated in clinical trials.
“The safety profile and efficacy of senotherapeutics in patients are yet to be fully investigated in clinical trials, and it is likely that the best senotherapeutic against age-associated diseases and malignancies is yet to be discovered.”
Quote in the paperSubstantial claim - Premisecitation
High throughput screening of commercial chemical compound libraries has led to the discovery of new families of senolytics: HSP90 inhibitors, the BET family protein degraders, and cardiac glycosides.
“To date, high throughput screening of commercial chemical compound libraries has led to the discovery of new families of senolytics: HSP90 inhibitors, 107 the BET family protein degraders, 108 and cardiac glycosides.37”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [107] Fuhrmann-Stroissnigg, 2017, Identification of HSP90 inhibitors as a novel class of senolytics, Nat Commun source
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- cites [108] Wakita, 2020, A BET family protein degrader provokes senolysis by targeting NHEJ and autophagy in senescent cells, Nat Commun source
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- cites [37] Schafer, 2017, Cellular senescence mediates fibrotic pulmonary disease, Nat Commun source
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- Interpretationcitation
Kidney senescence is not always detrimental.
“However, kidney senescence is not always detrimental.”
Quote in the paperSubstantial claim - Premisecitation
In an open-label phase 1 pilot study, 3 days of oral dasatinib (100 mg) and quercetin (1000 mg) administered to nine patients with obesity and diabetic kidney disease significantly decreased senescent cell markers and macrophage content.
“The main findings were a significant decrease in senescent cell markers and macrophage content, a significant increase in adipogenic progenitors, a significant decrease in SASP, and no serious adverse events.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [104] Hickson, 2019, Senolytics decrease senescent cells in humans: preliminary report from a clinical trial of dasatinib plus quercetin in individuals with diabetic kidney disease, EBioMedicine source
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- Interpretationcitation
Use of ABT263 is limited due to dose-limiting platelet toxicity.
“For example, the use of ABT263 is limited due to dose-limiting platelet toxicity.”
Quote in the paperSubstantial claim - Premisecitation
In an open-label phase 1 pilot study, 3 days of oral dasatinib (100 mg) and quercetin (1000 mg) administered to nine patients with obesity and diabetic kidney disease reported no serious adverse events.
“The main findings were a significant decrease in senescent cell markers and macrophage content, a significant increase in adipogenic progenitors, a significant decrease in SASP, and no serious adverse events.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [104] Hickson, 2019, Senolytics decrease senescent cells in humans: preliminary report from a clinical trial of dasatinib plus quercetin in individuals with diabetic kidney disease, EBioMedicine source
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- Premisecitation
In INK4-knockout mice subjected to unilateral ureteral obstruction, p16INK4A has an important role in reducing inflammation and cell proliferation.
“Studies in INK4-knockout mice subjected to unilateral ureteral obstruction showed that p16INK4A has an important role in reducing inflammation and cell proliferation.103”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [103] Wolstein, 2010, INK4a knockout mice exhibit increased fibrosis under normal conditions and in response to unilateral ureteral obstruction, Am J Physiol Renal Physiol source
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- Interpretationreasoning
It is not clear from murine studies whether senotherapy could be a suitable approach to counteract age-related bone loss and impairments in haematopoietic renewing.
“Therefore, it is not clear from these murine studies whether senotherapy could be a suitable approach to counteract age-related bone loss and impairments in haematopoietic renewing, and further studies are required to assess the safety and efficacy of these drugs.”
Quote in the paperSubstantial claim - Interpretationcitation
The safety and potency of existing senolytics can be improved by molecular engineering and drug delivery approaches.
“Furthermore, the safety and potency of existing senolytics can be improved by molecular engineering and drug delivery approaches.”
Quote in the paperSubstantial claim - Premisecitation
Clearance of chronically senescent cells from aged or irradiated animal models benefits multiple organs, including the kidney.
“Clearance of chronically senescent cells from aged or irradiated animal models benefits multiple organs, including the kidney.6,30”
Quote in the paperSubstantial claim0 of 2 sources checked - Premisecitation
A senescence-like phenotype is present in various post-mitotic cells of mice entering middle age in the absence of disease or advanced ageing.
“and a senescence-like phenotype is present in various post-mitotic cells of mice entering middle age in the absence of disease or advanced ageing.110”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [110] Raffaele, 2020, Senescence-like phenotype in post-mitotic cells of mice entering middle age, Aging (Albany NY) source
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- Interpretationreasoning
Eradicating senescent cells in an adult organism is not always beneficial.
“Eradicating senescent cells in an adult organism is not always beneficial.”
Quote in the paperSubstantial claim - Premisecitation
Other kidney cell types, such as parietal epithelium, podocytes, and vascular smooth muscle cells, showed positive staining for senescence markers.
“However, other kidney cell types, such as parietal epithelium, podocytes, and vascular smooth muscle cells, showed positive straining for senescence markers.102”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [102] Melk, 2005, Increased expression of senescence-associated cell cycle inhibitor p16INK4a in deteriorating renal transplants and diseased native kidney, Am J Transplant source
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- Interpretationcitation
Studies on the effects of senolytics on bone remodelling have shown divergent results.
“Studies on the effects of senolytics on bone remodelling have also showed divergent results.”
Quote in the paperSubstantial claim - Premisecitation
In an open-label phase 1 pilot study, 3 days of oral dasatinib (100 mg) and quercetin (1000 mg) administered to nine patients with obesity and diabetic kidney disease significantly decreased SASP.
“The main findings were a significant decrease in senescent cell markers and macrophage content, a significant increase in adipogenic progenitors, a significant decrease in SASP, and no serious adverse events.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [104] Hickson, 2019, Senolytics decrease senescent cells in humans: preliminary report from a clinical trial of dasatinib plus quercetin in individuals with diabetic kidney disease, EBioMedicine source
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- Premisecitation
Senescence can be induced in macrophages as part of a polarisation in response to reversible immunomodulatory stimuli.
“For instance, senescence can be induced in macrophages as part of a polarisation in response to reversible immunomodulatory stimuli, 109”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [109] Hall, 2017, p16(Ink4a) and senescence-associated β-galactosidase can be induced in macrophages as part of a reversible response to physiological stimuli, Aging (Albany NY) source
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- Premisecitation
Genetic removal of liver sinusoidal endothelial cells with high expression of p16 hampered the healthspan of mice because the procedure induced fibrosis in the liver and systemic perivasculature.
“Grosse and colleagues 111 reported that genetic removal of liver sinusoidal endothelial cells with high expression of p16 hampered the healthspan of mice because the procedure induced fibrosis in the liver and systemic perivasculature.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [111] Grosse, 2020, Defined p16High senescent cell types are indispensable for mouse healthspan, Cell Metab source
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- Premisecitation
In an open-label phase 1 pilot study, 3 days of oral dasatinib (100 mg) and quercetin (1000 mg) administered to nine patients with obesity and diabetic kidney disease significantly increased adipogenic progenitors.
“The main findings were a significant decrease in senescent cell markers and macrophage content, a significant increase in adipogenic progenitors, a significant decrease in SASP, and no serious adverse events.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [104] Hickson, 2019, Senolytics decrease senescent cells in humans: preliminary report from a clinical trial of dasatinib plus quercetin in individuals with diabetic kidney disease, EBioMedicine source
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- Interpretationreasoning
In patients, there is a paucity in data on the efficacy and safety of senotherapeutics from clinical trials, including systemic effects and side-effects.
“However, in patients, there is a paucity in data on the efficacy and safety of senotherapeutics from clinical trials, including systemic effects and side-effects.”
Quote in the paperSubstantial claim
- May combine two claims. 61
- Classified as probably not a substantial claim. 8
May combine two claims.
Interpretationnone givenRepurposing existing drugs and using new senotherapeutics are associated with various side-effects, incomplete functional characterisation of peripheral tissues at systemic administration, an absence of standardised guidelines for timing, dose, and route of administration, and a paucity of efficacy and safety data from clinical trials.
“However, the repurposing of existing drugs and the use of new senotherapeutics are associated with various side-effects; incomplete functional characterisation of peripheral tissues at systemic administration; an absence of standardised guidelines for timing, dose, and route of administration; and a paucity of efficacy and safety data from clinical trials.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationSenolytics decrease the number of naturally occurring senescent human cells in vitro, and improve physical function and increase the lifespan of aged mice.
“Senolytics decrease the number of naturally occurring senescent human cells in vitro, and improve physical function and increase the lifespan of aged mice.12,13”
Quote in the paperSubstantial claim0 of 2 sources checkedClassified as probably not a substantial claim. May combine two claims.
PremisecitationThe senescence-associated secretory phenotype (SASP) is a hallmark of senescent cells that mediates their pathophysiological effects, characterised by increased secretion of cytokines, chemokines, proteases, and growth factors.
“In this respect, the senescence-associated secretory phenotype (SASP), a hallmark of senescent cells that mediates their pathophysiological effects, is characterised by the increased secretion of some bioactive molecules, including cytokines, chemokines, proteases, and growth factors.2”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [2] Gorgoulis, 2019, Cellular senescence: defining a path forward, Cell source
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PremisecitationTissue ageing is caused by the accumulation of senescent cells, which alters physiological responses in the surrounding microenvironment in an autocrine and paracrine fashion through SASP.
“Over the past decade, it has become clear that tissue ageing is caused by the accumulation of senescent cells, which alters the physiological responses in the surrounding microenvironment in an autocrine and paracrine fashion through SASP.2,3”
Quote in the paperSubstantial claim0 of 2 sources checkedMay combine two claims.
PremisecitationSenescent adipocyte progenitors secrete activin A, a member of the transforming growth factor superfamily, and directly inhibit adipogenesis in non-senescent progenitors.
“In 2015, researchers from the Mayo Clinic showed that senescent adipocyte progenitors secrete activin A, a member of the transforming growth factor superfamily, and directly inhibit adipogenesis in non-senescent progenitors.44”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [44] Zaragosi, 2010, Activin a plays a critical role in proliferation and differentiation of human adipose progenitors, Diabetes source
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May combine two claims.
PremisecitationThe incidence of cancer increases when people get older because of the increased burden of cell senescence in organs, partly due to an impaired immune system, which results in reduced clearance of senescent cells.
“Nevertheless, the incidence of cancer increases when people get older because of the increased burden of cell senescence in organs, partly due to an impaired immune system, which results in a reduced clearance of senescent cells.4”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [4] Campisi, 2013, Aging, cellular senescence, and cancer, Annu Rev Physiol source
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May combine two claims.
InterpretationreasoningIntermittent administration of senolytics improves drug safety and reduces the risk of side-effects.
“Consequently, drug safety is improved and the risk of side-effects is reduced.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationSenescent cells accumulate in the heart with age and contribute to related pathologies in animal models.
“It has been shown that senescent cells accumulate in the heart with age and contribute to related pathologies in animal models.27”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [27] Anderson, 2019, Length-independent telomere damage drives post-mitotic cardiomyocyte senescence, EMBO J source
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PremisecitationFive days after a single dose of dasatinib (5 mg/kg) and quercetin (50 mg/kg), expression of senescent markers was reduced and exercise endurance was better than in vehicle-treated controls.
“5 days after a single dose of dasatinib (5 mg/kg) and quercetin (50 mg/kg) by oral gavage, expression of senescent markers was reduced and exercise endurance was better than in vehicle-treated controls.28”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [28] Zhu, 2015, The Achilles' heel of senescent cells: from transcriptome to senolytic drugs, Aging Cell source
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PremisecitationABT263 had no significant effect on cardiac function, left ventricle mass, or ventricle wall rigidity.
“However, ABT263 had no significant effect on cardiac function, left ventricle mass, or ventricle wall rigidity.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [27] Anderson, 2019, Length-independent telomere damage drives post-mitotic cardiomyocyte senescence, EMBO J source
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PremisecitationSix of 12 patients had a decrease in central subfield thickness, and three of four patients with wet age-related macular degeneration saw an improvement in disease-relevant pathology and a reduction in subretinal or intraretinal fluid.
“Six of 12 patients had a decrease in central subfield thickness, and three of four patients with wet age-related macular degeneration saw an improvement in disease-relevant pathology and a reduction in subretinal or intraretinal fluid.47”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [47]
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PremisecitationIn aged mice, resting satellite cells lose the ability to repress P16ink4a (Cdkn2a), switching from the reversible quiescent state to an irreversible pre-senescence state; when injured, these cells fail to activate and expand, entering full senescence.
“In aged mice, resting satellite cells lose the ability to repress P16ink4a (Cdkn2a), switching from the reversible quiescent state to an irreversible pre-senescence state.When injured, these cells fail to activate and expand, entering full senescence.51”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [51] Sousa-Victor, 2014, Geriatric muscle stem cells switch reversible quiescence into senescence, Nature source
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PremisecitationIn the Apoe-knockout mouse model of atherogenesis, treatment with dasatinib and quercetin decreased the burden of senescence and plaque calcification, even though no change in plaque size was observed.
“Treatment with dasatinib and quercetin decreased the burden of senescence and plaque calcification, even though no change in plaque size was observed.25”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [25] Roos, 2016, Chronic senolytic treatment alleviates established vasomotor dysfunction in aged or atherosclerotic mice, Aging Cell source
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PremisecitationClearance of senescent cells reduced the number of macrophages in visceral adipose tissue and prevented the migration of monocytes.
“Additionally, clearance of senescent cells reduced the number of macrophages in visceral adipose tissue and prevented the migration of monocytes.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [20] Palmer, 2019, Targeting senescent cells alleviates obesity-induced metabolic dysfunction, Aging Cell source
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PremisecitationSenescent cells accumulate with age in the dermis and epidermis, which can be accelerated by various harmful factors, such as DNA-damaging agents and mitochondrial dysfunction.
“Senescent cells accumulate with age in the dermis and epidermis, which can be accelerated by various harmful factors, such as DNA-damaging agents (eg, x-rays, ultraviolet radiation, and cigarette smoke) and mitochondrial dysfunction.56”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [56] Watanabe, 2017, Impact of senescence-associated secretory phenotype and its potential as a therapeutic target for senescence-associated diseases, Cancer Sci source
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PremisecitationUBX1325 showed a favourable acute safety profile supporting further clinical development; there were no dose-limiting toxicities and two non-serious adverse events unrelated to the drug.
“UBX1325 showed a favourable acute safety profile supporting further clinical development; there were no doselimiting toxicities and two non-serious adverse events unrelated to the drug.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [47]
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PremisecitationABT263 rescued the functional decrease in ejection fraction occurring after myocardial infarction in aged mice, improved left ventricular function, increased myocardial vascularisation, decreased scar size, and attenuated the inflammatory response in a young mouse model of ischaemia-reperfusion.
“Subsequently, it was shown that ABT263 was able to rescue the functional decrease in ejection fraction occurring after myocardial infarction in aged mice, to improve left ventricular function, to increase myocardial vascularisation, to decrease scar size, and to attenuate the inflammatory response in a young mouse model of ischaemia-reperfusion.23,24”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [23] Walaszczyk, 2019, Pharmacological clearance of senescent cells improves survival and recovery in aged mice following acute myocardial infarction, Aging Cell source
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- cites [24] Dookun, 2020, Clearance of senescent cells during cardiac ischemia-reperfusion injury improves recovery, Aging Cell source
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PremisecitationClearance of senescent cells in aged mice and in mice with atherosclerosis using genetic and pharmacological approaches improves vascular and myocardial function and attenuates age-dependent remodelling.
“Clearance of senescent cells in aged mice and in mice with atherosclerosis using genetic and pharmacological approaches improves vascular and myocardial function and attenuates age-dependent remodelling.25,27”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [25] Roos, 2016, Chronic senolytic treatment alleviates established vasomotor dysfunction in aged or atherosclerotic mice, Aging Cell source
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- cites [27] Anderson, 2019, Length-independent telomere damage drives post-mitotic cardiomyocyte senescence, EMBO J source
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PremisecitationSkeletal muscle mass and function decline with ageing, culminating in sarcopenia, and are linked to an increased burden of senescent cells with involvement of the immune system.
“Skeletal muscle mass and function decline with ageing, culminating in sarcopenia, and are linked to an increased burden of senescent cells with involvement of the immune system.52,53”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [52] Vinciguerra, 2010, Regulation of muscle atrophy in aging and disease, Adv Exp Med Biol source
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- cites [53] Vinciguerra, 2019, Sarcopenia and Parkinson's Disease
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PremisecitationIn a prospective cohort of 227 individuals with severe obesity, senescence-associated β-galactosidase activity was seven times higher in subcutaneous tissue than in omental adipose tissue and was correlated with altered glycaemic status; however, this activity was not associated with body-mass index or chronological age.
“Senescence-associated β-galactosidase activity was seven times higher in subcutaneous tissue than in omental adipose tissue and was correlated with altered glycaemic status; however, this activity was not associated with body-mass index or chronological age.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [45] Rouault, 2021, Senescence-associated β-galactosidase in subcutaneous adipose tissue associates with altered glycaemic status and truncal fat in severe obesity, Diabetologia source
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PremisecitationIn mice with Ldlr deficiency fed a high-fat diet, treatment with ABT263 led to inhibited atherogenesis and reduced number and average size of plaques.
“A study in mice aged 10 weeks with Ldlr deficiency, fed a high-fat diet (a reliable model of atherosclerosis in mice), and treated once daily with 100 mg/kg ABT263 for 5 days followed by 14 days off treatment on a repeating cycle for 88 days, showed that elimination of senescent cells led to inhibited atherogenesis and reduced the number and average size of plaques.26”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [26] Childs, 2016, Senescent intimal foam cells are deleterious at all stages of atherosclerosis, Science source
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PremisecitationA wealth of literature shows that exercise or physical activity might be the most cost-effective senolytic therapy, although there is large heterogeneity among published studies.
“However, a wealth of literature shows that exercise or physical activity might be the most costeffective senolytic therapy, although there is large heterogeneity among published studies.54”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [54] Chen, 2021, Is exercise a senolytic medicine? A systematic review, Aging Cell source
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PremisecitationUse of dasatinib and quercetin has not always been efficacious in every mouse model of metabolic disease; its efficacy seems to be controversial.
“Given that use of dasatinib and quercetin has not always been efficacious in every mouse model of metabolic disease, its efficacy seems to be controversial.”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [21] Ogrodnik, 2017, Cellular senescence drives age-dependent hepatic steatosis, Nat Commun source
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- cites [22] Raffaele, 2021, Mild exacerbation of obesity- and age-dependent liver disease progression by senolytic cocktail dasatinib + quercetin, Cell Commun Signal source
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PremisecitationIn aged mice, ruxolitinib lowered the number of senescent cells and circulating concentration of activin A, preserved fat mass, decreased lipotoxicity, and enhanced insulin sensitivity.
“The researchers found that this treatment lowered the number of senescent cells and circulating concentration of activin A, preserved fat mass, decreased lipotoxicity, and enhanced insulin sensitivity.19”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [19] Xu, 2015, Targeting senescent cells enhances adipogenesis and metabolic function in old age, eLife source
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May combine two claims.
PremisecitationTreatment with ABT263 in aged mice showed a significant reduction in heart hypertrophy and fibrosis, together with a compensatory regeneration in cardiomyocytes.
“Treatment with ABT263 showed a significant reduction in heart hypertrophy and fibrosis, together with a compensatory regeneration in cardiomyocytes.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [27] Anderson, 2019, Length-independent telomere damage drives post-mitotic cardiomyocyte senescence, EMBO J source
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May combine two claims.
PremisecitationDasatinib and quercetin decreased the burden of senescent cells and reduced hepatic steatosis in one study, but failed to promote clearance of senescent cells and prevent progression of non-alcoholic fatty liver disease in lean mice and in mice with obesity induced by a high-fat diet.
“Although this senolytic cocktail was shown to decrease the burden of senescent cells and reduce hepatic steatosis in one study, 21 it failed to promote clearance of senescent cells and prevent progression of non-alcoholic fatty liver disease in lean mice and in mice with obesity induced by a high-fat diet.22”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [21] Ogrodnik, 2017, Cellular senescence drives age-dependent hepatic steatosis, Nat Commun source
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- cites [22] Raffaele, 2021, Mild exacerbation of obesity- and age-dependent liver disease progression by senolytic cocktail dasatinib + quercetin, Cell Commun Signal source
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May combine two claims.
PremisecitationAfter 12 weeks of leg irradiation, mice aged 4 months showed impaired capacity in a treadmill exercise and an increased expression of senescent markers in the leg muscles.
“After 12 weeks of leg irradiation (10 Gy), mice aged 4 months showed impaired capacity in a treadmill exercise and an increased expression of senescent markers in the leg muscles.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [28] Zhu, 2015, The Achilles' heel of senescent cells: from transcriptome to senolytic drugs, Aging Cell source
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InterpretationreasoningExperimental findings in mice indicate that cellular senescence could be a potential causal factor in obesity-related inflammation and metabolic imbalance, and that senolytic agents could be a promising treatment for obesity-related metabolic dysfunction and its complications.
“These experimental findings in mice indicate that cellular senescence could be a potential causal factor in obesity-related inflammation and in metabolic imbalance, and that senolytic agents could be a promising treatment for obesity-related metabolic dysfunction and its complications.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationIn mice, senescent cells have shown the capacity to limit fibrosis and to promote proper wound healing through their secretion of platelet-derived growth factor AA in SASP, and chronic induction of cellular senescence might contribute to stem-cell loss with age.
“In mice, senescent cells have shown the capacity to limit fibrosis and to promote proper wound healing through their secretion of platelet-derived growth factor AA in SASP, 58 and chronic induction of cellular senescence might contribute to stem-cell loss with age.59”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [58] Demaria, 2014, An essential role for senescent cells in optimal wound healing through secretion of PDGF-AA, Dev Cell source
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- cites [59] Velarde, 2015, Pleiotropic age-dependent effects of mitochondrial dysfunction on epidermal stem cells, Proc Natl Acad Sci USA source
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InterpretationreasoningCollectively, these findings show that senescence has a key role in brain ageing and in related diseases in mice, and that senolytics can improve brain performance.
“Collectively, these findings show that senescence has a key role in brain ageing and in related diseases in mice, and that senolytics can improve brain performance.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationSenolytic drugs can eliminate p16-positive macrophages and senescent vascular cells, exerting a dual approach to reverse vascular remodelling.
“Senolytic drugs can eliminate p16-positive macrophages 85 and senescent vascular cells, exerting a dual approach to reverse vascular remodelling.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [85] Kakkola, 2013, Anticancer compound ABT-263 accelerates apoptosis in virus-infected cells and imbalances cytokine production and lowers survival rates of infected mice, Cell Death Dis source
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PremisecitationIn a doubletransgenic mouse model with induced human p14ARF gene expression, senescent cells increased in the epidermis and hair follicles arrested in the telogen stage.
“Another study, investigating the age-related increase of hair loss, used a doubletransgenic mouse model, in which human p14ARF gene expression was induced, leading to an increase of senescent cells in the epidermis and the growth arrest of hair follicles in the telogen stage.43”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [43] Yosef, 2016, Directed elimination of senescent cells by inhibition of BCL-W and BCL-XL, Nat Commun source
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PremisecitationClearance of senescent cells enhances brain function in healthy aged mice and in various murine models of neurodegenerative diseases, such as Parkinson's disease, neurodegeneration related to amyloid β, tau-dependent neurodegenerative diseases, and neuropsychiatric disorders.
“Clearance of senescent cells has been shown to enhance brain function in healthy aged mice 71 and in various murine models of Review neurodegenerative diseases, such as Parkinson's disease, 72 neurodegeneration related to amyloid β, 40 tau-dependent neurodegenerative iseases, 39 and neuropsychiatric disorders.73”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [71] Ogrodnik, 2021, Whole-body senescent cell clearance alleviates age-related brain inflammation and cognitive impairment in mice, Aging Cell source
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- cites [72] Chinta, 2018, Cellular senescence is induced by the environmental neurotoxin paraquat and contributes to neuropathology linked to Parkinson's disease, Cell Rep source
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- cites [73] Ogrodnik, 2019, Obesity-induced cellular senescence drives anxiety and impairs neurogenesis, Cell Metab source
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PremisecitationIntraperitoneal administration of ABT737 resulted in clearance of senescent cells in the epidermis and hair follicles, increasing non-senescent bulge capacity for proliferation and repopulation.
“Intraperitoneal administration of 75 mg/kg ABT737 on 2 or 4 consecutive days resulted in clearance of senescent cells in the epidermis and hair follicles, increasing non-senescent bulge capacity for proliferation and repopulation.43”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [43] Yosef, 2016, Directed elimination of senescent cells by inhibition of BCL-W and BCL-XL, Nat Commun source
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PremisecitationIn that study, pulmonary function, circulating concentrations of biochemical markers of senescence and profibrotic factors, frailty index scores, and reported health were unchanged.
“By contrast, pulmonary function, circulating concentrations of biochemical markers of senescence and profibrotic factors, frailty index scores, and reported health were unchanged.86”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [86] Justice, 2019, Senolytics in idiopathic pulmonary fibrosis: results from a first-in-human, open-label, pilot study, EBioMedicine source
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PremisecitationThis plant extract reduced the expression of various SASP components, ameliorating the negative paracrine crosstalk between these cells.
“This plant extract reduced the expression of various SASP components, ameliorating the negative paracrine crosstalk between these cells.60”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [60] Lämmermann, 2018, Blocking negative effects of senescence in human skin fibroblasts with a plant extract, NPJ Aging Mech Dis source
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Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationIL-6 is a chemotactic and prosurvival factor for monocytes and neutrophils.
“IL-6 is a chemotactic and prosurvival factor for monocytes and neutrophils.83”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [83] Kaplanski, 2003, IL-6: a regulator of the transition from neutrophil to monocyte recruitment during inflammation, Trends Immunol source
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InterpretationcitationThis pilot study implies that senolytic drugs might not have clinically significant toxicity and, therefore, could be safe for use in humans.
“This pilot study implies that senolytic drugs might not have clinically significant toxicity and, therefore, could be safe for use in humans.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationProlonged expression of transgenic p16INK4a in the epidermis of mice induced hyperplasia and dysplasia through a paracrine-mediated activation of the Wnt pathway, contributing to the development of premalignant skin lesions.
“In 2020, Azazmeh and colleagues 42 showed that prolonged expression of transgenic p16INK4a in the epidermis of mice induced hyperplasia and dysplasia through a paracrine-mediated activation of the Wnt pathway, contributing to the development of premalignant skin lesions.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [42] Azazmeh, 2020, Chronic expression of p16INK4a in the epidermis induces Wnt-mediated hyperplasia and promotes tumor initiation, Nat Commun source
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PremisecitationAged mice acutely infected with pathogens, including murine-β-coronavirus related to SARS-CoV-2, had increased senescence and 100% mortality.
“A Science report showed that aged mice acutely infected with pathogens, including murine-β-coronavirus related to SARS-CoV-2, had increased senescence and 100% mortality.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [15] Camell, 2021, Senolytics reduce coronavirus-related mortality in old mice, Science source
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PremisecitationTargeting senescent cells with either fisetin (20 mg/kg per day) or dasatinib (5 mg/kg) plus quercetin (50 mg/kg) on days 3, 4, 11, and 12 after pathogen exposure significantly reduced mortality (by 50%), cellular senescence, and inflammation, and increased antiviral responses.
“Targeting senescent cells with either fisetin (20 mg/kg per day) or dasatinib (5 mg/kg) plus quercetin (50 mg/kg) on days 3, 4, 11, and 12 after pathogen exposure significantly reduced mortality (by 50%), cellular senescence, and inflammation, and increased antiviral responses.15”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [15] Camell, 2021, Senolytics reduce coronavirus-related mortality in old mice, Science source
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PremisecitationIn a retrospective study of 28 patients with glaucoma, senolytic exposure did not affect visual acuity or intraocular pressure, and did not have toxic effects.
“Although a study in a mouse model showed that dasatinib prevented glaucoma-dependent loss of retinal functions and cellular structure, 41 a retrospective study assessing the effects of senolytic drugs on vision in 28 patients with glaucoma showed that senolytic exposure did not affect visual acuity or intraocular pressure, and did not have toxic effects.74”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [74] El-Nimri, 2020, Evaluating the neuroprotective impact of senolytic drugs on human vision, Sci Rep source
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PremisecitationIn a single-arm, open-label clinical trial in 12 patients with interstitial lung disease associated with systemic sclerosis, only three (25%) patients showed some clinical improvement, which correlated with a decrease in skin expression of SASP and other senescence-related gene sets.
“Only three (25%) patients showed some clinical improvement, which correlated with a decrease in skin expression of SASP and other senescence-related gene sets.61”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [61] Martyanov, 2019, Senescence signature in skin biopsies from systemic sclerosis patients treated with senolytic therapy: potential predictor of clinical response?, Arthritis Rheumatol source
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PremisecitationSenotherapy ameliorated phenotypes in all of these mouse models, attenuating tau phosphorylation and aggregation, reducing neuroinflammation and amyloid β plaque load, and improving cognitive deficits.
“Senotherapy has been shown to ameliorate phenotypes in all of these mouse models, attenuating tau phosphorylation and aggregation, 39 reducing neuroinflammation and amyloid β plague load, and improving cognitive deficits.40”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [39] Bussian, 2018, Clearance of senescent glial cells prevents tau-dependent pathology and cognitive decline, Nature source
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- cites [40] Zhang, 2019, Senolytic therapy alleviates Aβ-associated oligodendrocyte progenitor cell senescence and cognitive deficits in an Alzheimer's disease model, Nat Neurosci source
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PremisecitationIn macrophages, p16 expression is associated with proliferation of and differentiation into the proinflammatory M1 macrophage, leading to increased IL-6 secretion.
“In macrophages, p16 expression is associated with proliferation of and differentiation into the proinflammatory M1 macrophage, 84 leading to increased IL-6 secretion.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [84] Frescas, 2017, Murine mesenchymal cells that express elevated levels of the CDK inhibitor p16(Ink4a) in vivo are not necessarily senescent, Cell Cycle source
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PremisecitationUse of dasatinib (5 mg/kg) and quercetin (50 mg/kg) by oral gavage once a week for 3 weeks improved pulmonary function and physical health, although lung fibrosis was visibly unaltered.
“The use of dasatinib (5 mg/kg) and quercetin (50 mg/kg) by oral gavage once a week for 3 weeks improved pulmonary function and physical health, although lung fibrosis was visibly unaltered.37”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [37] Schafer, 2017, Cellular senescence mediates fibrotic pulmonary disease, Nat Commun source
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PremisecitationIntraperitoneal administration of ABT737 eliminated p16-positive cells, inactivated the Wnt pathway, and subsequently suppressed hyperplasia.
“Intraperitoneal administration of the ABT263 analogue, ABT737 (75 mg/kg six times over 9 days after 6 months of Cdk2a induction), eliminated p16-positive cells, inactivated the Wnt pathway, and subsequently suppressed hyperplasia.42”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [42] Azazmeh, 2020, Chronic expression of p16INK4a in the epidermis induces Wnt-mediated hyperplasia and promotes tumor initiation, Nat Commun source
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PremisecitationIntraperitoneal administration of ABT263 reversed vascular remodelling and improved pulmonary haemodynamics in the end stage of shunt-induced pulmonary arterial hypertension in a rat model.
“Van der Feen and colleagues 36 showed that intraperitoneal administration of ABT263 (10 mg/kg daily for 7 days) reversed vascular remodelling and improved pulmonary haemodynamics in the end stage of shuntinduced pulmonary arterial hypertension in a rat model.36”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [36] van der Feen, 2020, Cellular senescence impairs the reversibility of pulmonary arterial hypertension, Sci Transl Med source
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PremisecitationFOXO4-DRI (5 mg/kg injected every 2 days for 6 days) triggers selective apoptosis in senescent cells induced by ageing and by chemotherapy, resulting in improvement in mouse health, including protection of renal structure and function.
“The most important contribution came from Baar and colleagues, 17 who designed the interfering peptide, FOXO4-DRI (5 mg/kg injected every 2 days for 6 days), which was shown to trigger selective apoptosis in senescent cells induced by ageing and by chemotherapy, resulting in an improvement in mouse health, including protection of renal structure and function.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [17] Baar, 2017, Targeted apoptosis of senescent cells restores tissue homeostasis in response to chemotoxicity and aging, Cell source
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Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationHaematopoiesis involves both haematopoietic and nonhaematopoietic cells.
“It is well established that haematopoiesis, the generation of new blood cells that takes place in the bone marrow, involves both haematopoietic and nonhaematopoietic cells.94”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [94] Dorshkind, 1990, Regulation of hemopoiesis by bone marrow stromal cells and their products, Annu Rev Immunol source
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Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationDasatinib, quercetin, and other senolytics were discovered using a mechanism-based approach.
“Dasatinib, quercetin, and other senolytics were discovered using a mechanism-based approach.7,26,105”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [7] Kirkland, 2017, The clinical potential of senolytic drugs, J Am Geriatr Soc source
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- cites [26] Childs, 2016, Senescent intimal foam cells are deleterious at all stages of atherosclerosis, Science source
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- cites [105] Pignolo, 2020, Reducing senescent cell burden in aging and disease, Trends Mol Med source
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PremisecitationOral administration of ABT263 in sublethally irradiated mice and naturally aged mice resulted in mitigation of premature ageing of the haematopoietic system induced by total body irradiation and rejuvenation of aged haematopoietic stem cells.
“In 2016, Chang and colleagues 30 showed that oral administration of ABT263 in sublethally irradiated mice and naturally aged mice resulted in a mitigation of premature ageing of the haematopoietic system induced by total body irradiation and a rejuvenation of aged haematopoietic stem cells.30”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [30] Chang, 2016, Clearance of senescent cells by ABT263 rejuvenates aged hematopoietic stem cells in mice, Nat Med source
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PremisecitationABT263 treatment in aged female and male mice reduced trabecular bone volume fraction (by 60.1% in females and 45.6% in males) and the ability of osteoblasts derived from bone marrow stem cells to produce mineralised matrix (by 88% in females and 83% in males), despite decreasing the burden of senescent cells.
“However, another study showed that, despite decreasing the burden of senescent cells, ABT263 treatment in aged female and male mice reduced both trabecular bone volume fraction (by 60•1% in females and by 45•6% in males) and the ability of osteoblasts derived from bone marrow stem cells to produce mineralised matrix (by 88% in females and by 83% in males).35”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [35] Sharma, 2020, The senolytic drug navitoclax (ABT-263) causes trabecular bone loss and impaired osteoprogenitor function in aged mice, Front Cell Dev Biol source
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Classified as probably not a substantial claim. May combine two claims.
InterpretationreasoningResults of experiments based exclusively on transgenic mice might not fully characterise the spectra of senescent cells seen in vivo, suggesting that the use of senotherapeutics could be a valid alternative to explore the effect of eliminating senescent cells in the kidney.
“The results of experiments based exclusively on transgenic mice might not fully characterise the spectra of senescent cells seen in vivo, suggesting that the use of senotherapeutics could be a valid alternative to explore Review the effect of eliminating senescent cells in the kidney.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationABT263 and other Bcl-xL-inhibitory BH3 mimetics induced thrombocytopenia and a transient thrombocytopathy, which could impair the haemostatic function of platelets.
“However, several other studies indicated that ABT263 and other Bcl-xL-inhibitory BH3 mimetics induced thrombocytopenia and a transient thrombocytopathy, which could impair the haemostatic function of platelets.33,34”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [33] Schoenwaelder, 2011, Bcl-xL-inhibitory BH3 mimetics can induce a transient thrombocytopathy that undermines the hemostatic function of platelets, Blood source
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- cites [34] He, 2020, Using proteolysis-targeting chimera technology to reduce navitoclax platelet toxicity and improve its senolytic activity, Nat Commun
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May combine two claims.
Interpretationown dataThe open-label phase 1 pilot study did not report effects on metabolic and renal function and can be considered preliminary.
“This study did not report effects on metabolic and renal function, and can be considered preliminary.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationAgeing and genotoxic stress induce cellular senescence of haematopoietic stem cells and osteoprogenitor cells, with subsequent decline in their functions in both mice and humans.
“Ageing and genotoxic stress induce cellular senescence of these stem cells 96,97 and osteoprogenitor cells, 98,99 with subsequent decline in the functions of these cells in both mice and humans.100”
Quote in the paperSubstantial claim0 of 5 sources checked- cites [96] Shao, 2014, Total body irradiation causes long-term mouse BM injury via induction of HSC premature senescence in an Ink4a- and Arf-independent manner, Blood source
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- cites [97] Le, 2010, Ionizing radiation-induced long-term expression of senescence markers in mice is independent of p53 and immune status, Aging Cell source
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- cites [98] Li, 2017, FOXP1 controls mesenchymal stem cell commitment and senescence during skeletal aging, J Clin Invest source
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- cites [99] Oh, 2014, Stem cell aging: mechanisms, regulators and therapeutic opportunities, Nat Med source
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- cites [100] Lee, 2019, Causes and mechanisms of hematopoietic stem cell aging, Int J Mol Sci
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Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationBone ageing is a major risk factor for primary osteoporosis, an age-related disease characterised by altered bone metabolism that suppresses bone formation and promotes bone resorption, impairing bone homoeostasis.
“Bone ageing is major risk factor for primary osteoporosis, an age-related disease characterised by altered bone metabolism that suppresses bone formation and promotes bone resorption, 91 impairing bone homoeostasis.92”
Quote in the paperNot a substantial claim0 of 2 sources checkedMay combine two claims.
PremisecitationTargeting senescent cells in aged mice (20-24 months) with established bone loss by dasatinib (5 mg/kg) plus quercetin (50 mg/kg) once monthly for 4 months, or by ABT263 (41 μmol/kg) daily for 5 days, lowered bone resorption, with maintained trabecular bone formation and enhanced cortical bone formation.
“Some studies have shown that targeting senescent cells in aged mice (aged 20-24 months) with established bone loss by use of dasatinib (5 mg/kg) plus quercetin (50 mg/kg) by oral gavage once monthly for 4 months, 31 or by ABT263 (41 μmol/kg) daily for 5 days, 105 lowered bone resorption, with maintained trabecular bone formation and enhanced cortical bone formation.31,32”
Quote in the paperSubstantial claim0 of 2 sources checkedProbably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationBone homoeostasis relies on a dynamic balance between osteogenesis, carried out by osteoblasts, and osteoclastogenesis, carried out by osteoclasts.
“Bone homoeostasis relies on a dynamic balance between osteogenesis, carried out by osteoblasts, and osteoclastogenesis, carried out by osteoclasts.93”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [93] Cummings, 2002, Epidemiology and outcomes of osteoporotic fractures, Lancet source
Not checked in the free run.
May combine two claims.
PremisecitationAcute senescence has beneficial effects and contributes to antifibrotic mechanisms in murine models of unilateral ureteral obstruction, which leads to tubular injury and subsequent renal fibrosis.
“For example, acute senescence has been observed to have beneficial effects and to contribute to antifibrotic mechanisms in murine models of unilateral ureteral obstruction, which leads to tubular injury and subsequent renal fibrosis.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [103] Wolstein, 2010, INK4a knockout mice exhibit increased fibrosis under normal conditions and in response to unilateral ureteral obstruction, Am J Physiol Renal Physiol source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationNon-haematopoietic stromal cells, including osteoblasts and osteoprogenitor cells, promote the maintenance of haematopoietic stem cells.
“Non-haematopoietic stromal cells, including osteoblasts and osteoprogenitor cells, promote the maintenance of haematopoietic stem cells.95”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [95] Morrison, 2014, The bone marrow niche for haematopoietic stem cells, Nature source
Not checked in the free run.
May combine two claims.
PremisecitationCompared with ABT263, PZ15227 was less toxic to platelets but was a more potent senolytic in vitro and in vivo.
“Compared with ABT263, PZ15227 was shown to be less toxic to platelets, but was a more potent senolytic in vitro and in vivo.34”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [34] He, 2020, Using proteolysis-targeting chimera technology to reduce navitoclax platelet toxicity and improve its senolytic activity, Nat Commun
Not checked in the free run.
May combine two claims.
InterpretationcitationSenolytic drugs have shown promising results in the elimination of senescent cells and in alleviating various diseases in animal models.
“In conclusion, senolytic drugs have shown promising results in the elimination of senescent cells and in alleviating various diseases in animal models (figure).”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationGiven high expression of p16, dasatinib and quercetin treatment removed senescent macrophages, but was ineffective against senescent liver sinusoidal endothelial cells in mice.
“Interestingly, given the high expression of p16, dasatinib and quercetin treatment removed senescent macrophages, but was ineffective against senescent liver sinusoidal endothelial cells in mice.111”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [111] Grosse, 2020, Defined p16High senescent cell types are indispensable for mouse healthspan, Cell Metab source
Not checked in the free run.
The paper relies on this without support.
UBX0101 failed a phase 2 study in patients with osteoarthritis in the knee.
“However, the leading compound, UBX0101 (Unity Biotechnology, San Francisco, CA, USA), failed a phase 2 study in patients with osteoarthritis in the knee, a major setback for this early stage research into senotherapy.”
The paper relies on this without support.
UBX0101 did not improve clinical symptoms in patients with osteoarthritis in the knee.
“It is not known whether UBX0101 was able to remove senescent cells; however, the drug did not improve clinical symptoms.”
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
Numerous findings have shown that senescent cell removal is largely beneficial.
“Numerous findings have shown that senescent cell removal is largely beneficial”
From Modulation of fracture healing by senescence-associated secretory phenotype (SASP): a narrative review of the current literature (2024) · cites this paper as [105]
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
Each contradiction between two passages listed here was confirmed by an independent check.
Diabetic kidney disease pilot study has two patient counts
MinorThe paper describes a phase 1 pilot study using the same three-day dasatinib and quercetin regimen in patients with diabetic kidney disease, but gives its size as seven patients in one section and nine in another.
“In a small, openlabel, phase 1 pilot study of seven patients with diabetic kidney disease, administration of once daily oral dasatinib (100 mg) and quercetin (1000 mg) for 3 days”
“In an open-label, phase 1 pilot study, 3 days of oral dasatinib (100 mg) and quercetin (1000 mg) were administered orally to nine patients with obesity and diabetic kidney disease.”
Figure reports reduced lung fibrosis despite unchanged fibrosis in the text
MinorThe figure attributes reduced fibrosis to dasatinib and quercetin (‡), citing study 37. The pulmonary section says fibrosis was visibly unaltered after that treatment in study 37.
“• Reduced fibrosis ‡ ¶ 37,38”
“The use of dasatinib (5 mg/kg) and quercetin (50 mg/kg) by oral gavage once a week for 3 weeks improved pulmonary function and physical health, although lung fibrosis was visibly unaltered.37”
The citation lists haven’t been fetched yet
References 109 · Cited by 140
Research works printed but not linked: 1
- Meyer, 1996, Immune dysregulation in the aging human lung, Am J Respir Crit Care Med, 153, 1072, 10.1164/ajrccm.153.3.8630547 · DOI · Paper page
- Authors
- Raffaele, M., & Vinciguerra, M.
- Affiliations
- International Clinical Research Center, St. Anne's University Hospital Brno (CZ)
- Medical University of Varna (BG)
- Corresponding author
- Vinciguerra, Manlio
- Venue
- The Lancet Healthy Longevity
- Publisher
- Elsevier BV
- Published
- 2022-01
- Volume
- 3
- Issue
- 1
- Pages
- e67-e77
- ISSN
- 2666-7568 (ISSN-L)
- OpenAlex
- W4211037299
- Semantic Scholar
- 7f69480c3dd34b0eadb66917857302ea983b9233
- Cited by
- 140
- References
- 109
- Citations by year
- 2026: 29 · 2025: 33 · 2024: 32 · 2023: 37 · 2022: 9
- FWCI
- 3.89
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- The Lancet Healthy Longevity (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- Liverpool John Moores University (acceptedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- European Regional Development Fund
- Topics
- Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
- Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
- Keywords
- senotherapeutics, cellular senescence, senolytics, senomorphics, senescence-associated secretory phenotype, age-related diseases, cardiometabolic disease, neurodegenerative diseases, cancer, adverse effects, off-label drug use, clinical trials
- MeSH terms
- Senotherapeutics, Aging, Animals, Cost-Benefit Analysis, Humans, Neoplasms, Cellular Senescence
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