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Liu Y, Wang T, Zhou Q, Xin G, Niu H, Li F, Wang Y, Li S, Dong Y, Zhang K, Feng L, Fu W, Zhang B, Huang W. Endogenous SIRT6 in platelets negatively regulates platelet activation and thrombosis. Front Pharmacol 2023; 14:1268708. [PMID: 38186648 PMCID: PMC10766690 DOI: 10.3389/fphar.2023.1268708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 12/07/2023] [Indexed: 01/09/2024] Open
Abstract
Thromboembolism resulting from platelet dysfunction constitutes a significant contributor to the development of cardiovascular disease. Sirtuin 6 (SIRT6), an essential NAD+-dependent enzyme, has been linked to arterial thrombosis when absent in endothelial cells. In the present study, we have confirmed the presence of SIRT6 protein in anucleated platelets. However, the precise regulatory role of platelet endogenous SIRT6 in platelet activation and thrombotic processes has remained uncertain. Herein, we present compelling evidence demonstrating that platelets isolated from SIRT6-knockout mice (SIRT6-/-) exhibit a notable augmentation in thrombin-induced platelet activation, aggregation, and clot retraction. In contrast, activation of SIRT6 through specific agonist treatment (UBCS039) confers a pronounced protective effect on platelet activation and arterial thrombosis. Moreover, in platelet adoptive transfer experiments between wild-type (WT) and SIRT6-/- mice, the loss of SIRT6 in platelets significantly prolongs the mean thrombus occlusion time in a FeCl3-induced arterial thrombosis mouse model. Mechanistically, we have identified that SIRT6 deficiency in platelets leads to the enhanced expression and release of proprotein convertase subtilisin/kexin type 9 (PCSK9), subsequently activating the platelet activation-associated mitogen-activated protein kinase (MAPK) signaling pathway. These findings collectively unveil a novel protective role of platelet endogenous SIRT6 in platelet activation and thrombosis. This protective effect is, at least in part, attributed to the inhibition of platelet PCSK9 secretion and mitogen-activated protein kinase signaling transduction. Our study provides valuable insights into the intricate interplay between SIRT6 and platelet function, shedding light on potential therapeutic avenues for managing thrombotic disorders.
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Affiliation(s)
- Yanli Liu
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Tao Wang
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Qilong Zhou
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Guang Xin
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Hai Niu
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Fan Li
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Yilan Wang
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Shiyi Li
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Yuman Dong
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Kun Zhang
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Lijuan Feng
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Wei Fu
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Boli Zhang
- Innovative Chinese Medicine Academician Workstation, West China Hospital, Sichuan University, Chengdu, China
| | - Wen Huang
- Department of Neurosurgery, Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, China
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Liu YP, Wen R, Liu CF, Zhang TN, Yang N. Cellular and molecular biology of sirtuins in cardiovascular disease. Biomed Pharmacother 2023; 164:114931. [PMID: 37263163 DOI: 10.1016/j.biopha.2023.114931] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 05/15/2023] [Accepted: 05/22/2023] [Indexed: 06/03/2023] Open
Abstract
Sirtuins (SIRTs) are a nicotinic adenine dinucleotide (+) -dependent histone deacetylase that regulates critical signaling pathways in prokaryotes and eukaryotes. Studies have identified seven mammalian homologs of the yeast SIRT silencing message regulator 2, namely, SIRT1-SIRT7. Recent in vivo and in vitro studies have successfully demonstrated the involvement of SIRTs in key pathways for cell biological function in physiological and pathological processes of the cardiovascular system, including processes including cellular senescence, oxidative stress, apoptosis, DNA damage, and cellular metabolism. Emerging evidence has stimulated a significant evolution in preventing and treating cardiovascular disease (CVD). Here, we review the important roles of SIRTs for the regulatory pathways involved in the pathogenesis of cardiovascular diseases and their molecular targets, including novel protein post-translational modifications of succinylation. In addition, we summarize the agonists and inhibitors currently identified to target novel specific small molecules of SIRTs. A better understanding of the role of SIRTs in the biology of CVD opens new avenues for therapeutic intervention with great potential for preventing and treating CVD.
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Affiliation(s)
- Yong-Ping Liu
- Department of Pediatric, Shengjing Hospital of China Medical University, No. 36, San Hao Street, Shenyang, Liaoning 110004, China
| | - Ri Wen
- Department of Pediatric, Shengjing Hospital of China Medical University, No. 36, San Hao Street, Shenyang, Liaoning 110004, China
| | - Chun-Feng Liu
- Department of Pediatric, Shengjing Hospital of China Medical University, No. 36, San Hao Street, Shenyang, Liaoning 110004, China
| | - Tie-Ning Zhang
- Department of Pediatric, Shengjing Hospital of China Medical University, No. 36, San Hao Street, Shenyang, Liaoning 110004, China.
| | - Ni Yang
- Department of Pediatric, Shengjing Hospital of China Medical University, No. 36, San Hao Street, Shenyang, Liaoning 110004, China.
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Astigiano C, Piacente F, Laugieri ME, Benzi A, Di Buduo CA, Miguel CP, Soncini D, Cea M, Antonelli A, Magnani M, Balduini A, De Flora A, Bruzzone S. Sirtuin 6 Regulates the Activation of the ATP/Purinergic Axis in Endothelial Cells. Int J Mol Sci 2023; 24:ijms24076759. [PMID: 37047732 PMCID: PMC10095398 DOI: 10.3390/ijms24076759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/03/2023] [Accepted: 04/03/2023] [Indexed: 04/09/2023] Open
Abstract
Sirtuin 6 (SIRT6) is a member of the mammalian NAD+-dependent deac(et)ylase sirtuin family. SIRT6’s anti-inflammatory roles are emerging increasingly often in different diseases and cell types, including endothelial cells. In this study, the role of SIRT6 in pro-inflammatory conditions was investigated by engineering human umbilical vein endothelial cells to overexpress SIRT6 (SIRT6+ HUVECs). Our results showed that SIRT6 overexpression affected the levels of adhesion molecules and sustained megakaryocyte proliferation and proplatelet formation. Interestingly, the pro-inflammatory activation of the ATP/purinergic axis was reduced in SIRT6+ HUVECs. Specifically, the TNFα-induced release of ATP in the extracellular space and the increase in pannexin-1 hemichannel expression, which mediates ATP efflux, were hampered in SIRT6+ cells. Instead, NAD+ release and Connexin43 expression were not modified by SIRT6 levels. Moreover, the Ca2+ influx in response to ATP and the expression of the purinergic receptor P2X7 were decreased in SIRT6+ HUVECs. Contrary to extracellular ATP, extracellular NAD+ did not evoke pro-inflammatory responses in HUVECs. Instead, NAD+ administration reduced endothelial cell proliferation and motility and counteracted the TNFα-induced angiogenesis. Altogether, our data reinforce the view of SIRT6 activation as an anti-inflammatory approach in vascular endothelium.
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Affiliation(s)
- Cecilia Astigiano
- Department of Experimental Medicine, University of Genova, Viale Benedetto XV, 1, 16132 Genova, Italy
| | - Francesco Piacente
- Department of Experimental Medicine, University of Genova, Viale Benedetto XV, 1, 16132 Genova, Italy
| | - Maria Elena Laugieri
- Department of Experimental Medicine, University of Genova, Viale Benedetto XV, 1, 16132 Genova, Italy
| | - Andrea Benzi
- Department of Experimental Medicine, University of Genova, Viale Benedetto XV, 1, 16132 Genova, Italy
| | - Christian A. Di Buduo
- Department of Molecular Medicine, University of Pavia, Via C. Forlanini 6, 27100 Pavia, Italy
| | - Carolina P. Miguel
- Department of Molecular Medicine, University of Pavia, Via C. Forlanini 6, 27100 Pavia, Italy
| | - Debora Soncini
- Department of Internal Medicine, University of Genova, Viale Benedetto XV, 6, 16132 Genova, Italy
| | - Michele Cea
- Department of Internal Medicine, University of Genova, Viale Benedetto XV, 6, 16132 Genova, Italy
- IRCCS Ospedale Policlinico San Martino, Largo R. Benzi, 16132 Genova, Italy
| | - Antonella Antonelli
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Via Saffi 2, 61029 Urbino, Italy
| | - Mauro Magnani
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Via Saffi 2, 61029 Urbino, Italy
| | - Alessandra Balduini
- Department of Molecular Medicine, University of Pavia, Via C. Forlanini 6, 27100 Pavia, Italy
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
| | - Antonio De Flora
- Department of Experimental Medicine, University of Genova, Viale Benedetto XV, 1, 16132 Genova, Italy
| | - Santina Bruzzone
- Department of Experimental Medicine, University of Genova, Viale Benedetto XV, 1, 16132 Genova, Italy
- IRCCS Ospedale Policlinico San Martino, Largo R. Benzi, 16132 Genova, Italy
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Ziętara P, Dziewięcka M, Augustyniak M. Why Is Longevity Still a Scientific Mystery? Sirtuins-Past, Present and Future. Int J Mol Sci 2022; 24:ijms24010728. [PMID: 36614171 PMCID: PMC9821238 DOI: 10.3390/ijms24010728] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/22/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023] Open
Abstract
The sirtuin system consists of seven highly conserved regulatory enzymes responsible for metabolism, antioxidant protection, and cell cycle regulation. The great interest in sirtuins is associated with the potential impact on life extension. This article summarizes the latest research on the activity of sirtuins and their role in the aging process. The effects of compounds that modulate the activity of sirtuins were discussed, and in numerous studies, their effectiveness was demonstrated. Attention was paid to the role of a caloric restriction and the risks associated with the influence of careless sirtuin modulation on the organism. It has been shown that low modulators' bioavailability/retention time is a crucial problem for optimal regulation of the studied pathways. Therefore, a detailed understanding of the modulator structure and potential reactivity with sirtuins in silico studies should precede in vitro and in vivo experiments. The latest achievements in nanobiotechnology make it possible to create promising molecules, but many of them remain in the sphere of plans and concepts. It seems that solving the mystery of longevity will have to wait for new scientific discoveries.
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