Cited by 1,478Gut microbiota and healthOral microbiology and periodontitis researchBlood Pressure and Hypertension Studies

Gut Dysbiosis Is Linked to Hypertension

Open access
Yang, Tao, Santisteban, Monica M., Rodriguez, Vermali, Li, Eric, Ahmari, Niousha, Carvajal, Jessica Marulanda, Zadeh, Mojgan, Gong, Minghao +6 more·2015·Hypertension

Abstract

Emerging evidence suggests that gut microbiota is critical in the maintenance of physiological homeostasis. This study was designed to test the hypothesis that dysbiosis in gut microbiota is associated with hypertension because genetic, environmental, and dietary factors profoundly influence both gut microbiota and blood pressure. Bacterial DNA from fecal samples of 2 rat models of hypertension and a small cohort of patients was used for bacterial genomic analysis. We observed a significant decrease in microbial richness, diversity, and evenness in the spontaneously hypertensive rat, in addition to an increased Firmicutes/Bacteroidetes ratio. These changes were accompanied by decreases in acetate- and butyrate-producing bacteria. In addition, the microbiota of a small cohort of human hypertensive patients was found to follow a similar dysbiotic pattern, as it was less rich and diverse than that of control subjects. Similar changes in gut microbiota were observed in the chronic angiotensin II infusion rat model, most notably decreased microbial richness and an increased Firmicutes/Bacteroidetes ratio. In this model, we evaluated the efficacy of oral minocycline in restoring gut microbiota. In addition to attenuating high blood pressure, minocycline was able to rebalance the dysbiotic hypertension gut microbiota by reducing the Firmicutes/Bacteroidetes ratio. These observations demonstrate that high blood pressure is associated with gut microbiota dysbiosis, both in animal and human hypertension. They suggest that dietary intervention to correct gut microbiota could be an innovative nutritional therapeutic strategy for hypertension.

AI snapshot

Written from the paper’s full text.

TL;DR

This study reports that hypertension is associated with gut microbiota dysbiosis in two rat models and a small human cohort, characterized by reduced microbial richness/diversity and an increased Firmicutes-to-Bacteroidetes ratio. Oral minocycline lowered blood pressure in Ang II-infused rats and rebalanced several dysbiotic features of the gut microbiota.

Key findings

  • In spontaneously hypertensive rats (SHR; MAP 148 ± 10 mmHg) versus Wistar Kyoto controls (WKY; MAP 108 ± 2 mmHg), microbial richness, evenness, and diversity were decreased, and the Firmicutes/Bacteroidetes ratio was ~5-fold higher.
  • SHR showed ~3-fold fewer acetate-producing and ~2-fold fewer butyrate-producing bacteria, with increased lactate-producing bacteria; Bifidobacterium was significantly depleted.
  • In a small human cohort, high-systolic-blood-pressure patients (144 ± 9 mmHg; n=7) had lower Chao richness and Shannon diversity than normal-SBP controls (119 ± 2 mmHg; n=10), with a non-significant trend toward lower Pielou evenness.
  • In chronic Ang II-infused rats, oral minocycline for 4 weeks lowered 24-hour MAP (124 ± 2 mmHg vs 168 ± 2 mmHg), reduced the elevated Firmicutes/Bacteroidetes ratio, increased Bacteroidetes, and expanded acetate- and butyrate-producing bacteria.

Methods

  • Fecal bacterial DNA from two rat hypertension models—SHR versus WKY and chronic Ang II infusion with/without oral minocycline—and from a small human cohort with normal versus high systolic blood pressure was analyzed by 16S rDNA sequencing.
  • Microbial communities were assessed using Chao richness, Pielou evenness, Shannon diversity, weighted UniFrac distances with PCoA, phylum-level composition, and LEfSe at the genus level.
  • Animal procedures were approved by the University of Florida IACUC; human studies were approved by the University of Florida IRB.

Limitations

  • The paper states that the human cohort was small and that larger studies are needed; it also notes that plasma lactate was not measured, that some Ang II findings did not reach significance, and that whether dysbiosis precedes hypertension remains unknown.
  • The paper states that minocycline can cross the blood-brain barrier, so it cannot rule out whether its antihypertensive effect is primarily gut-mediated, brain-mediated, or linked.
  • Evident from the text: the human data are cross-sectional and associational, with only 17 total subjects, and the two control subjects within the HTN PCoA plot were under anti-hypertensive treatment with suboptimal medication/dosage, limiting causal and subgroup inference.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1161/hypertensionaha.115.05315

Cites

66 of 67 references verified0 citation errors · 1 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 35 cited sources checked · 0 supported · 0 flagged

  • Findingown data

    In SHR compared with WKY, microbial evenness was drastically decreased.

    “Microbial richness, evenness, and diversity were all found to be drastically decreased in the SHR group when compared with the WKY control (Figure 1A).”
    Quote in the paperSubstantial claim
  • Findingown data

    Enrichment of Akkermansia, Bacteroides, Enterorhabdus and Marvinbryantia was observed in Ang II + minocycline treated group.

    “Figure 7A shows the enrichment of Akkermansia, Bacteroides, Enterorhabdus and Marvinbryantia in Ang II + minocycline treated group.”
    Quote in the paperSubstantial claim
  • Findingown data

    The composition of fecal microbial communities of WKY and SHR were distinct.

    “The composition of the fecal microbial communities of the WKY and SHR were found to be distinct, as presented in Figure 1B.”
    Quote in the paperSubstantial claim
  • Findingown data

    Uncultured and incertae sedis bacteria genera OTUs (2761 and 3955) belonging to Firmicutes were significantly enriched in SHR.

    “The abundance of other uncultured and incertae sedis bacteria genera OTUs (2761 and 3955) that belonged to Firmicutes were significantly enriched in the SHR.”
    Quote in the paperSubstantial claim
  • Findingown data

    Oral administration of minocycline resulted in a remarkable increase of both acetate- and butyrate-producing bacteria.

    “However, oral administration of minocycline resulted in a remarkable increase of both the acetate- and butyrate-producing bacteria.”
    Quote in the paperSubstantial claim
  • May combine two claims. 22
  • The quote only partly states this claim. 1
  • Classified as probably not a substantial claim. 13
  • May combine two claims.

    Findingown data

    In chronically infused Ang II rats, acetate- and butyrate-producing bacteria genera were depleted, but this finding failed to reach significance.

    “Similar to the SHR, the acetate- and butyrate-producing bacteria genera were also depleted in chronically infused Ang II rats, although this finding failed to reach significance (Figure 7B).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Rats infused with Ang II showed a trend toward lower bacterial load compared with control, but it did not reach significance.

    “Consistent with the SHR, rats infused with Ang II showed a trend toward lower bacterial load, although this finding did not reach significance (Figure 5B).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    In Ang II-infused rats compared with control, there was a trend towards relatively higher abundance of Firmicutes and lower abundance of Bacteroidetes, but differences did not reach individual significance.

    “Additionally, the pie charts that represent the composition of microbiota at the phylum level show a trend towards relative higher abundance of Firmicutes and a lower abundance of Bacteroidetes in Ang II-infused rats when compared with control (Figure 6B), though the differences between those two groups did not reach individual significance.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    In patients with high SBP compared with normal SBP, there was a trend towards a decrease in Pielou evenness, but it did not reach statistical significance.

    “There was a trend towards a decrease in Pielou evenness as well, but it did not reach statistical significance with this limited number of patients.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Minocycline treatment improves gut microbial homeostasis during HTN dysbiosis and rebalances the gut acetate-, butyrate-, and lactate-producing bacterial populations.

    “our data show it improves gut microbial homeostasis during HTN dysbiosis and is able to rebalance the gut acetate-, butyrate-, and lactate-producing bacterial populations.”
    • Also stated in: § Discussion · plain
      “Treatment with oral minocycline dose that attenuates HTN also produces beneficial effects on dysbiosis.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning

    The diminished proportion of Actinobacteria indicates a less diverse microbiota in SHR, consistent with decreased Chao richness and Shannon diversity.

    “The diminished proportion of Actinobacteria indicates a less diverse microbiota in the SHR, which is consistent with the decrease in Chao richness and Shannon diversity.”
    Quote in the paperSubstantial claim
  • May combine two claims. The quote only partly states this claim.

    Interpretationreasoning

    The decrease in acetate- and butyrate-producing bacteria and increase in lactate-producing bacteria in SHR indicates a dysfunction in both acetogenic and butyrogenic capabilities.

    “This indicates a dysfunction in both acetogenic and butyrogenic capabilities.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data

    The dysbiosis in the Ang II model is characterized by both an increase in Firmicutes and a decrease in Bacteroidetes.

    “This indicates that the dysbiosis in this model is characterized by both an increase in Firmicutes and a decrease in Bacteroidetes.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationcitation

    The reduction in fecal biomass in SHR and trend toward reduction in Ang II model is consistent with previous reports that dysbiosis is associated with a decrease of bacterial loads.

    “Finally, we found a reduction in the fecal biomass in the SHR, as well as a trend toward reduction in the Ang II infusion model. This is consistent with the previous reports that dysbiosis is associated with a decrease of bacterial loads35.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [35] Leclercq S Matamoros S Cani PD Neyrinck AM Jamar F Starkel P Windey K Tremaroli V Backhed F Verbeke K de Timary P Delzenne NM Intestinal permeability, gut-bacterial dysbiosis, and behavioral markers of alcohol-dependence severity Proc Natl Acad Sci U S A 2014 111 E4485 4493 25288760 PMC4210345 source

      Not checked in the free run.

  • May combine two claims.

    Interpretationown data

    HTN-associated dysbiosis is characterized as an accumulation of lactate-producing bacteria and a reduction of acetate and butyrate producers.

    “Thus, HTN-associated dysbiosis is characterized as an accumulation of lactate-producing bacteria and a reduction of acetate and butyrate producers.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Interpretationreasoning

    The discrepancies between our findings and previous studies may be accounted for by pathophysiological differences between WKY and SHR colonies, lack of housing details, sample size, and model choice.

    “However, the discrepancies may be accounted for by: (1) significant pathophysiological differences between WKY and SHR colonies depending on origin, breeding, and maintenance protocols; (2) lack of details regarding animal housing or pathogen-free facilities; (3) utilizing large enough number of rats necessary to detect a differences; (4) choosing the best models available for human HTN.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Premisecitation

    Our previous studies have indicated that minocycline influences microglial activation and neuroinflammation in autonomic brain regions.

    “Our previous studies have indicated that minocycline influences microglial activation and neuroinflammation in autonomic brain regions27.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [27] Shi P Diez-Freire C Jun JY Qi Y Katovich MJ Li Q Sriramula S Francis J Sumners C Raizada MK Brain microglial cytokines in neurogenic hypertension Hypertension 2010 56 297 303 20547972 PMC2929640

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    All animal procedures were approved by the University of Florida Institutional Animal Care and Use Committee.

    “All animal procedures were approved by the University of Florida Institutional Animal Care and Use Committee.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Premisecitation

    Recent data suggest that gut microbiota may play a role in the development and maintenance of CVD and metabolic disorders such as obesity, diabetes and metabolic syndrome.

    “However, recent data suggest that it may also play a role in the development and maintenance of CVD and metabolic disorders such as obesity, diabetes and metabolic syndrome11–14.”
    Quote in the paperSubstantial claim0 of 4 sources checked
    • cites [11] Tang WH Wang Z Levison BS Koeth RA Britt EB Fu X Wu Y Hazen SL Intestinal microbial metabolism of phosphatidylcholine and cardiovascular risk N Engl J Med 2013 368 1575 1584 23614584 PMC3701945 source

      Not checked in the free run.

    • cites [12] Tilg H Kaser A Gut microbiome, obesity, and metabolic dysfunction J Clin Invest 2011 121 2126 2132 21633181 PMC3104783

      Not checked in the free run.

    • cites [13] Everard A Cani PD Diabetes, obesity and gut microbiota Best Pract Res Clin Gastroenterol 2013 27 73 83 23768554

      Not checked in the free run.

    • cites [14] Howitt MR Garrett WS A complex microworld in the gut: Gut microbiota and cardiovascular disease connectivity Nat Med 2012 18 1188 1189 22869188

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Previous studies failed to identify differences in the gut microbiota between WKY and SHR and L-NAME hypertension.

    “Previous studies failed to identify differences in the gut microbiota between WKY and SHR36, and L-NAME hypertension37.”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [36] Petriz BA Castro AP Almeida JA Gomes CP Fernandes GR Kruger RH Pereira RW Franco OL Exercise induction of gut microbiota modifications in obese, non-obese and hypertensive rats BMC Genomics 2014 15 511 24952588 PMC4082611 source

      Not checked in the free run.

    • cites [37] Xu J Ahren IL Prykhodko O Olsson C Ahrne S Molin G Intake of blueberry fermented by lactobacillus plantarum affects the gut microbiota of l-name treated rats Evid Based Complement Alternat Med 2013 2013 809128 23690854 PMC3638594

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    A decrease in Akkermansia has been associated with obesity and diabetes, and introduction of Akkermansia could reverse the metabolic disorder and improve inflammation in diabetic and obese patients.

    “It is pertinent to point out that a decrease in Akkermansia has been associated with obesity and diabetes, and introduction of Akkermansia could reverse the metabolic disorder and improve inflammation in diabetic and obese patients49.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [49] Everard A Belzer C Geurts L Ouwerkerk JP Druart C Bindels LB Guiot Y Derrien M Muccioli GG Delzenne NM de Vos WM Cani PD Cross-talk between akkermansia muciniphila and intestinal epithelium controls diet-induced obesity Proc Natl Acad Sci U S A 2013 110 9066 9071 23671105 PMC3670398 source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Doxycycline belongs to the same antibiotic class as minocycline but has limited ability to pass through the blood brain barrier, and its effects on BP are inconclusive.

    “Doxycycline belongs to the same antibiotic class but has limited ability to pass through the blood brain barrier, and its effects on BP are inconclusive as there are multiple conflicting reports25,55.”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [25] Duncan SH Holtrop G Lobley GE Calder AG Stewart CS Flint HJ Contribution of acetate to butyrate formation by human faecal bacteria Br J Nutr 2004 91 915 923 15182395

      Not checked in the free run.

    • cites [55] Garrido-Mesa N Zarzuelo A Gálvez J Minocycline: Far beyond an antibiotic Br J Pharmacol 2013 169 337 352 23441623 PMC3651660

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Previous studies have indicated that depletion of microbiota required a combination of at least 3 antibiotics for 3-4 weeks, and single antibiotics may not be sufficient to reduce total bacterial load.

    “This is not surprising, as previous studies have indicated that the depletion of microbiota required a combination of at least of 3 antibiotics for 3–4 weeks29, 30, and single antibiotics may not be sufficient to reduce the total bacterial load31.”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites [29] Rakoff-Nahoum S Paglino J Eslami-Varzaneh F Edberg S Medzhitov R Recognition of commensal microflora by toll-like receptors is required for intestinal homeostasis Cell 2004 118 229 241 15260992 source

      Not checked in the free run.

    • cites [30] Reikvam DH Erofeev A Sandvik A Grcic V Jahnsen FL Gaustad P McCoy KD Macpherson AJ Meza-Zepeda LA Johansen FE Depletion of murine intestinal microbiota: Effects on gut mucosa and epithelial gene expression PLoS One 2011 6 e17996 21445311 PMC3061881

      Not checked in the free run.

    • cites [31] Million M Lagier JC Yahav D Paul M Gut bacterial microbiota and obesity Clin Microbiol Infect 2013 19 305 313 23452229

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Minocycline inhibits expression of pro-inflammatory cytokines and intestinal damage in mouse model of colitis.

    “it inhibits expression of pro-inflammatory cytokines and intestinal damage in mouse model of colitis51, 52”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [51] Garrido-Mesa N Camuesco D Arribas B Comalada M Bailón E Cueto-Sola M Utrilla P Nieto A Zarzuelo A Rodríguez-Cabezas ME Gálvez J The intestinal anti-inflammatory effect of minocycline in experimental colitis involves both its immunomodulatory and antimicrobial properties Pharmacol Res 2011 63 308 319 21193045

      Not checked in the free run.

    • cites [52] Garrido-Mesa N Utrilla P Comalada M Zorrilla P Garrido-Mesa J Zarzuelo A Rodríguez-Cabezas ME Gálvez J The association of minocycline and the probiotic escherichia coli nissle 1917 results in an additive beneficial effect in a dss model of reactivated colitis in mice Biochem Pharmacol 2011 82 1891 1900 21930116

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Minocycline attenuates gut damage and intestinal mucositis due to cancer chemotherapy.

    “it attenuates gut damage and intestinal mucositis due to cancer chemotherapy53”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [53] Huang TY Chu HC Lin YL Ho WH Hou HS Chao YC Liao CL Minocycline attenuates 5-fluorouracil-induced small intestinal mucositis in mouse model Biochem Biophys Res Commun 2009 389 634 639 19765544

      Not checked in the free run.

  • May combine two claims.

    Interpretationreasoning

    HTN gut dysbiosis is characterized by an imbalance in specific microbial populations and their corresponding metabolites, specifically decreased acetate and butyrate-producing bacteria and increased lactate-producing bacteria.

    “Therefore, we can conclude that the HTN gut dysbiosis is characterized by an imbalance in specific microbial populations and their corresponding metabolites, specifically decreased acetate and butyrate-producing bacteria and increased lactate-producing bacteria.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    Both Bacteroides and Marvinbryantia produce acetate as their main fermentation product, and Akkermansia and Enterorhabdus have been found to be inversely associated with obesity and diabetes.

    “Functionally, both Bacteroides and Marvinbryantia produce acetate as their main fermentation product, and Akkermansia and Enterorhabdus have been found to be inversely associated with obesity and diabetes33.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [33] Duca FA Sakar Y Lepage P Devime F Langelier B Dore J Covasa M Replication of obesity and associated signaling pathways through transfer of microbiota from obese-prone rats Diabetes 2014 63 1624 1636 24430437

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Minocycline is an anti-inflammatory antibiotic that freely crosses the blood-brain barrier and has been shown to produce beneficial effects in combating HTN.

    “Minocycline is an anti-inflammatory antibiotic that freely crosses the blood-brain barrier and has been shown to produce beneficial effects in combating HTN26, 27.”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [26] Liao TV Forehand CC Hess DC Fagan SC Minocycline repurposing in critical illness: Focus on stroke Curr Top Med Chem 2013 13 2283 2290 24059465

      Not checked in the free run.

    • cites [27] Shi P Diez-Freire C Jun JY Qi Y Katovich MJ Li Q Sriramula S Francis J Sumners C Raizada MK Brain microglial cytokines in neurogenic hypertension Hypertension 2010 56 297 303 20547972 PMC2929640

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Changes in gut microbiota have been related to chronic inflammatory diseases such as asthma, allergies, inflammatory bowel disease, and infectious diseases.

    “Typically, changes in gut microbiota have been related to chronic inflammatory diseases such as asthma, allergies, inflammatory bowel disease, and infectious diseases10.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [10] Collado MC Rautava S Isolauri E Salminen S Gut microbiota: A source of novel tools to reduce the risk of human disease? Pediatr Res 2015 77 182 188 25335085 source

      Not checked in the free run.

  • Classified as probably not a substantial claim. May combine two claims.

    Premisecitation

    An increased F/B ratio is widely considered a signature of gut dysbiosis and has been associated with obesity, diabetes, and CVD.

    “An increased F/B ratio, caused by an expansion of Firmicutes and/or a contraction of Bacteroidetes, has been widely considered a signature of gut dysbiosis and has been associated with obesity, diabetes, and CVD8, 13, 16.”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites [8] Mariat D Firmesse O Levenez F Guimaraes V Sokol H Dore J Corthier G Furet JP The firmicutes/bacteroidetes ratio of the human microbiota changes with age BMC Microbiol 2009 9 123 19508720 PMC2702274 source

      Not checked in the free run.

    • cites [13] Everard A Cani PD Diabetes, obesity and gut microbiota Best Pract Res Clin Gastroenterol 2013 27 73 83 23768554

      Not checked in the free run.

    • cites [16] Sanz Y Moya-Perez A Microbiota, inflammation and obesity Adv Exp Med Biol 2014 817 291 317 24997040

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    Human studies were approved by the University of Florida Institutional Review Board.

    “Human studies were approved by the University of Florida Institutional Review Board.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Gut microbiota plays an important role in shaping a robust systemic and intestinal immune system.

    “In the periphery, gut microbiota plays an important role in shaping a robust systemic and intestinal immune system6, 7.”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [6] Chow J Lee SM Shen Y Khosravi A Mazmanian SK Host-bacterial symbiosis in health and disease Adv Immunol 2010 107 243 274 21034976 PMC3152488

      Not checked in the free run.

    • cites [7] McDermott AJ Huffnagle GB The microbiome and regulation of mucosal immunity Immunology 2014 142 24 31 24329495 PMC3992044

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    We did not measure plasma lactate in any of our experiments.

    “However, we did not measure plasma lactate in any of our experiments, and this remains a future direction.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    The F/B ratio is well validated in rodent and human samples; its significance in pig models requires further studies.

    “It is important to note that the F/B ratio is well validated in rodent and human samples; however its significance in pig models requires further studies33, 34.”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [33] Duca FA Sakar Y Lepage P Devime F Langelier B Dore J Covasa M Replication of obesity and associated signaling pathways through transfer of microbiota from obese-prone rats Diabetes 2014 63 1624 1636 24430437

      Not checked in the free run.

    • cites [34] Pedersen R Andersen AD Molbak L Stagsted J Boye M Changes in the gut microbiota of cloned and non-cloned control pigs during development of obesity: Gut microbiota during development of obesity in cloned pigs BMC Microbiol 2013 13 30 23391125 PMC3610253

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Minocycline has shown an impressive ability to decrease BP, improve HbA1C levels, and weight loss in our pilot study.

    “Additionally, minocycline is the drug approved in our patient studies (NCT#02133872 and 02133885) which has shown an impressive ability to decrease BP, improve HbA1C levels, and weight loss in our pilot study28.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [28] Hu P Thinschmidt JS Yan Y Hazra S Bhatwadekar A Caballero S Salazar T Miyan JA Li W Derbenev A Zsombok A Tikhonenko M Dominguez JM 2nd McGorray SP Saban DR Boulton ME Busik JV Raizada MK Chan-Ling T Grant MB Cns inflammation and bone marrow neuropathy in type 1 diabetes Am J Pathol 2013 183 1608 1620 24160325 PMC3814523

      Not checked in the free run.

  • Classified as probably not a substantial claim.

    Premisecitation

    An increase in hematopoietic stem cells has been implicated in their extravasation into the brain and establishment of neuroinflammation in many neural diseases.

    “This increase in HSCs has been implicated in their extravasation into the brain and establishment of neuroinflammation in many neural diseases57,58.”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [57] Santisteban MM Zubcevic J Kim S Marulanda-Carvajal J Zingler M Joseph J Raizada MK Iba1+ microglia/macrophages in the rat hypothalamic paraventricular nucleus are both resident and bone marrow-derived in ang ii induced hypertension the faseb journal 2014 28 1

      Not checked in the free run.

    • cites [58] Katsumoto A Lu H Miranda AS Ransohoff RM Ontogeny and functions of central nervous system macrophages J Immunol 2014 193 2615 2621 25193935 PMC4157312

      Not checked in the free run.

31 of 31
  • The paper relies on this without support.

    The chronic Ang II infusion rat model is a well-validated and established model of human hypertension.

    “For this purpose, we used the chronic Ang II infusion model, which is a well-validated and established model of HTN.”
1 of 1

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?

  • Microbial compositional changes have been reported in patients with cardiovascular disease risk factors including hypertension, dyslipidemia, insulin resistance, and other metabolic phenotypes.

    “microbial compositional changes have been reported in patients with numerous CVD risk factors including hypertension, dyslipidemia, insulin resistance, and other metabolic phenotypes10, 11.”

    From Gut microbiota and cardiovascular disease. (2020) · cites this paper as [10]

  • A significant proportion of SCFAs produced in the distal bowel is reabsorbed from the gut lumen by facilitated apical solute transport via multiple transporters and passive diffusion.

    “A significant proportion of the SCFAs produced in the distal bowel is reabsorbed from the gut lumen by facilitated apical solute transport via multiple different transporters114–117 as well as via passive (concentration-dependent) diffusion118.”

    From Dietary metabolism, the gut microbiome, and heart failure (2019) · cites this paper as [116]

  • Elevations in the Firmicutes:Bacteroidetes ratio have been associated with a high-fat diet and obesity, irritable bowel syndrome, hypertension, type 1 diabetes, and HIV.

    “Elevations in the Firmicutes:Bacteroidetes ratio have been associated with a high-fat diet and obesity[274,328,329], irritable bowel syndrome[330], hypertension[331], type 1 diabetes[276], and HIV[332].”
  • Interventions that target the gut microbiota, such as a high-fibre diet, probiotics and antibiotics, have blood-pressure lowering effects in animal models and in patients with hypertension.

    “Finally, studies in animal models and in patients with hypertension have reported that interventions that target the gut microbiota, such as a high-fibre diet, probiotics and antibiotics, have blood-pressure lowering effects87,92–99.”
  • Gut dysbiosis has been reported in animal models and in patients with hypertension.

    “Gut dysbiosis has been reported in animal models87–89 and in patients with hypertension87,90 (Table 1).”

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Authors
Yang, T., Santisteban, M. M., Rodriguez, V., Li, E., Ahmari, N., Carvajal, J. M., Zadeh, M., Gong, M., Qi, Y., Zubcevic, J., Sahay, B., Pepine, C. J., Raizada, M. K., & Mohamadzadeh, M.
Affiliations
From the Department of Infectious Diseases and Pathology, College of Veterinary Medicine (T.Y., M.Z., M.G., B.S., M.M.), Division of Gastroenterology, Hematology and Nutrition, Department of Medicine (T.Y., M.Z., M.G., B.S., M.M.), Department of Physiology and Functional Genomics (M.M.S., V.R., J.M.C., M.K.R.), College of Medicine, Division of Cardiovascular Medicine, Department of Medicine (V.R., Y.Q., C.J.P.), Division of Infectious Diseases and Global Medicine, Department of Medicine (E.L.), and...
Corresponding author
  • Yang, Tao
  • Santisteban, Monica M.
Venue
Hypertension
Published
2015-06
Volume
65
Issue
6
Pages
1331-1340
ISSN
  • 0194-911X (ISSN-L)
  • 1524-4563
OpenAlex
W2136344314
Cited by
1,478
References
66
Citations by year
2026: 70 · 2025: 144 · 2024: 171 · 2023: 180 · 2022: 207 · 2021: 208 · 2020: 176 · 2019: 126 · 2018: 83 · 2017: 56 · 2016: 40 · 2015: 16
FWCI
28.24
Type
journal article
Language
en
Open access
Locations
  • Hypertension (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • American Heart Association
  • National Institutes of Health (UL1TR001427, UL1TR000064)
  • National Heart, Lung, and Blood Institute (HL33610, R01HL033610, UM1HL087366, R37HL033610)
  • National Institute of Allergy and Infectious Diseases (AI093370, R01AI093370)
  • National Center for Advancing Translational Sciences
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Dentistry › Periodontics › Oral microbiology and periodontitis research
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Blood Pressure and Hypertension Studies
Keywords
gut dysbiosis, gut microbiota, spontaneously hypertensive rats, angiotensin II infusion, Firmicutes/Bacteroidetes ratio, microbial diversity, butyrate-producing bacteria, minocycline, dietary intervention, blood pressure regulation
MeSH terms
Animals, Disease Models, Animal, DNA, Bacterial, Feces, Humans, Hypertension, Minocycline, Random Allocation, Rats, Inbred SHR, Rats, Inbred WKY, Species Specificity, Cohort Studies, Comorbidity, Treatment Outcome, Risk Assessment, Gastrointestinal Tract, Rats, Microbiota, Dysbiosis

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-09.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-09.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

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