Cited by 180Inflammasome and immune disordersSirtuins and Resveratrol in MedicineDietary Effects on Health

Fasting and refeeding differentially regulate NLRP3 inflammasome activation in human subjects

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Traba, Javier, Kwarteng-Siaw, Miriam, Okoli, Tracy C., Li, Jessica, Huffstutler, Rebecca D., Bray, Amanda, Waclawiw, Myron A., Han, Kim +4 more·2015·Journal of Clinical Investigation

Abstract

BACKGROUND: Activation of the NLRP3 inflammasome is associated with metabolic dysfunction, and intermittent fasting has been shown to improve clinical presentation of NLRP3 inflammasome-linked diseases. As mitochondrial perturbations, which function as a damage-associated molecular pattern, exacerbate NLRP3 inflammasome activation, we investigated whether fasting blunts inflammasome activation via sirtuin-mediated augmentation of mitochondrial integrity. METHODS: We performed a clinical study of 19 healthy volunteers. Each subject underwent a 24-hour fast and then was fed a fixed-calorie meal. Blood was drawn during the fasted and fed states and analyzed for NRLP3 inflammasome activation. We enrolled an additional group of 8 healthy volunteers to assess the effects of the sirtuin activator, nicotinamide riboside, on NLRP3 inflammasome activation. RESULTS: In the fasting/refeeding study, individuals showed less NLRP3 inflammasome activation in the fasted state compared with that in refed conditions. In a human macrophage line, depletion of the mitochondrial-enriched sirtuin deacetylase SIRT3 increased NLRP3 inflammasome activation in association with excessive mitochondrial ROS production. Furthermore, genetic and pharmacologic SIRT3 activation blunted NLRP3 activity in parallel with enhanced mitochondrial function in cultured cells and in leukocytes extracted from healthy volunteers and from refed individuals but not in those collected during fasting. CONCLUSIONS: Together, our data indicate that nutrient levels regulate the NLRP3 inflammasome, in part through SIRT3-mediated mitochondrial homeostatic control. Moreover, these results suggest that deacetylase-dependent inflammasome attenuation may be amenable to targeting in human disease. TRIAL REGISTRATION: ClinicalTrials.gov NCT02122575 and NCT00442195. FUNDING: Division of Intramural Research, NHLBI of the NIH.

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Crossref · 10.1172/jci83260

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  • NR and NMN have beneficial pharmacological activities in acute renal failure, inflammation, cardio- and vasoprotection, telomere lengthening, and lifespan extension.

    “In addition, they have demonstrated beneficial pharmacological activities in acute renal failure [28], anti-inflammatory [29–31], cardio and vasoprotective actions [32–35], telomere lengthening [36, 37•], extend lifespan and promote health in various organisms, from yeasts to mammals [10, 14, 15, 38].”

    From NAD+ Precursors Nicotinamide Mononucleotide (NMN) and Nicotinamide Riboside (NR): Potential Dietary Contribution to Health (2023) · cites this paper as [30]

    The Discussion reports that NR reduced cytokine release and blunted NLRP3 inflammasome activation in cells from healthy volunteers, supporting the anti-inflammatory portion of the citing sentence. This paper does not establish the same effect for NMN, and its cell experiments do not demonstrate a clinical anti-inflammatory benefit. The other claimed activities have separate citations in the citing sentence and are not attributed to this source. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • NR decreased IL-1β and TNF-α secretion in monocytes and macrophages from healthy volunteers, with the largest reductions in monocytes (>50% for IL-1β and >75% for TNF-α) and smaller reductions in macrophages (~20% for IL-1β and ~45% for TNF-α).

    “Additionally, NR decreased Interleukin-1β (IL-1β) and tumor necrosis factor-alpha (TNF-α) secretion in monocytes and macrophages from healthy volunteers, with the most significant reductions in monocytes of over 50% for IL-1β (from approximately 22,000 to 10,000 pg/mL) and over 75% for TNF-α (from above 2000 to less than 500 pg/mL). In macrophages, the most pronounced reduction was around 20% for”

    From NAD+ Precursors Nicotinamide Mononucleotide (NMN) and Nicotinamide Riboside (NR): Potential Dietary Contribution to Health (2023) · cites this paper as [30]

    The Discussion (page unavailable) says NR decreased cytokine release in monocytes and primary macrophages from healthy volunteers. It does not give the claimed IL-1β and TNF-α reductions for each cell type, or establish that the reductions were larger in monocytes. The cited Supplemental Figure 4 values are not present in our copy. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • NR reduced acetylation of SOD2 and isocitrate dehydrogenase 2 while increasing mitochondrial SOD2 activity, thereby reducing mitochondrial ROS levels.

    “NR reduced acetylation of SOD2 and isocitrate dehydrogenase 2, while increasing mitochondrial SOD2 activity, thereby reducing mitochondrial ROS levels.”
  • 24-h administration of NR to PBMCs from healthy subjects replicated the fasting effect of blunting NLRP3 inflammasome activation and enhancing mitochondrial quality control through SIRT3.

    “Consistent with NR’s known role in increasing NAD+ levels and consequently SIRT3 activation, the 24-h administration of NR (amount not described) to PBMCs from healthy subjects replicated the fasting effect of blunting NLRP3 inflammasome activation and enhancing mitochondrial quality control through SIRT3 [30].”
  • SIRT3 can directly bind and deacetylate SOD2, leading to increased SOD2 activity and subsequently exerting significant effects on mitochondrial reactive oxygen species homeostasis and NLRP3 inflammasome activation.

    “More importantly, SIRT3 can directly bind and deacetylate SOD2, leading to increased SOD2 activity and subsequently exerting significant effects on mtROS homeostasis and NLRP3 inflammasome activation.18, 19, 20”

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Authors
Traba, J., Kwarteng-Siaw, M., Okoli, T. C., Li, J., Huffstutler, R. D., Bray, A., Waclawiw, M. A., Han, K., Pelletier, M., Sauve, A. A., Siegel, R. M., & Sack, M. N.
Affiliations
  • National Heart, Lung, and Blood Institute (US)
  • National Institutes of Health (US)
  • Weill Cornell Medicine (US)
Venue
Journal of Clinical Investigation
Published
2015-11-03
Volume
125
Issue
12
Pages
4592-4600
ISSN
  • 0021-9738 (ISSN-L)
  • 1558-8238
OpenAlex
W2131482219
Cited by
180
References
48
Citations by year
2026: 10 · 2025: 18 · 2024: 20 · 2023: 12 · 2022: 26 · 2021: 14 · 2020: 22 · 2019: 16 · 2018: 14 · 2017: 16 · 2016: 10 · 2015: 1 · 2014: 1
FWCI
5.94
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (HL005102‐11, Z01HL005102)
  • NHLBI Division of Intramural Research
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
  • Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
  • Health Sciences › Medicine › Physiology › Dietary Effects on Health
Keywords
NLRP3 inflammasome, fasting, refeeding, SIRT3, sirtuins, nicotinamide riboside, mitochondrial homeostasis, mitochondrial reactive oxygen species, macrophages, inflammation, metabolic dysfunction
MeSH terms
NLR Family, Pyrin Domain-Containing 3 Protein, Adult, Carrier Proteins, Eating, Fasting, Female, Humans, Male, Mitochondria, Niacinamide, Pyridinium Compounds, Inflammasomes

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