Cited by 51Platelet Disorders and TreatmentsSirtuins and Resveratrol in MedicineBlood Coagulation and Thrombosis Mechanisms

Sirtuin Inhibition Induces Apoptosis-like Changes in Platelets and Thrombocytopenia

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Kumari, Sharda, Chaurasia, Susheel N., Nayak, Manasa K., Mallick, Ram L., Dash, Debabrata·2015·Journal of Biological Chemistry

Abstract

Sirtuins are evolutionarily conserved NAD + -dependent acetyl-lysine deacetylases that belong to class III type histone deacetylases. In humans, seven sirtuin isoforms (Sirt1 to Sirt7) have been identified. Sirtinol, a cell-permeable lactone ring derived from naphthol, is a dual Sirt1/Sirt2 inhibitor of low potency, whereas EX-527 is a potent and selective Sirt1 inhibitor. Here we demonstrate that Sirt1, Sirt2, and Sirt3 are expressed in enucleate platelets. Both sirtinol and EX-527 induced apoptosis-like changes in platelets, as revealed by enhanced annexin V binding, reactive oxygen species production, and drop in mitochondrial transmembrane potential. These changes were associated with increased phagocytic clearance of the platelets by macrophages. Expression of acetylated p53 and the conformationally active form of Bax were found to be significantly higher in both sirtinol- and EX-527-treated platelets, implicating the p53-Bax axis in apoptosis induced by sirtuin inhibitors. Administration of either sirtinol or EX-527 in mice led to a reduction in both platelet count and the number of reticulated platelets. Our results, for the first time, implicate sirtuins as a central player in the determination of platelet aging. Because sirtuin inhibitors are being evaluated for their antitumor activity, this study refocuses attention on the potential side effect of sirtuin inhibition in delimiting platelet life span and management of thrombosis. Background: The role of sirtuins in regulating platelet aging is largely unexplored. Results: Sirtuin inhibitors induced apoptosis-like changes in blood platelets, associated with a rise in active Bax and a significant drop in platelet count. Conclusion: Sirtuins act as a central player in the determination of platelet aging. Significance: This study refocuses attention on the potential side effect of sirtuin inhibition in delimiting platelet life span and management of thrombosis.

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Crossref · 10.1074/jbc.m114.615948

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  • Sirtuins play a central role in platelet aging, and inhibition of sirtuins restricts platelet life span and management of thrombosis.

    “In the study of anticancer properties of sirtuin inhibitors, it has been found, that sirtuins play a central role in platelet aging. This suggests that the process of sirtuins inhibition involves the restriction of platelet life span and management of thrombosis (Kumari et al. 2015).”

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Authors
Kumari, S., Chaurasia, S. N., Nayak, M. K., Mallick, R. L., & Dash, D.
Affiliations
Institute of Medical Sciences (IN)
Corresponding author
Dash, Debabrata
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2015-05
Volume
290
Issue
19
Pages
12290-12299
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1975735861
Cited by
51
References
38
Citations by year
2025: 4 · 2024: 3 · 2023: 4 · 2022: 5 · 2021: 4 · 2020: 6 · 2019: 3 · 2018: 5 · 2017: 10 · 2016: 5 · 2015: 2
FWCI
5.76
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Hematology › Platelet Disorders and Treatments
  • Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
  • Health Sciences › Medicine › Hematology › Blood Coagulation and Thrombosis Mechanisms
Keywords
sirtuins, sirtuin inhibitors, platelets, thrombocytopenia, platelet aging, sirtinol, EX527, SIRT1, SIRT2, SIRT3, p53, Bax, macrophage phagocytosis, reactive oxygen species, mitochondrial membrane potential, platelet survival, thrombosis
MeSH terms
Animals, Blood Platelets, Cell Nucleus, Flow Cytometry, Gene Expression Regulation, Humans, Macrophages, Membrane Potentials, Phagocytosis, Platelet Count, Thrombocytopenia, Thrombosis, Apoptosis, Annexin A5, Reactive Oxygen Species, bcl-2-Associated X Protein, Mice, Sirtuin 1, Sirtuin 2, Sirtuin 3

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