MHY2233 Attenuates Replicative Cellular Senescence in Human Endothelial Progenitor Cells <i>via</i> SIRT1 Signaling

Lamichane, Shreekrishna; Baek, Sang-Hong; Kim, Yeon-Ju; Park, Ji Hye; Lamichane, Babita Dahal; Jang, Woong Bi; Ji, Seung-Taek; Lee, Na Kyung; Li, Dehua; Kim, Da Yeon; Kang, Su-Tae; Seong, Ha Jong; Yun, Jisoo; Lee, Dong‐Hyung; Moon, Hyung Ryong; Chung, Hae Young; Kwon, Sang‐Mo

doi:10.1155/2019/6492029

Cited by 45 publications

(32 citation statements)

References 55 publications

(71 reference statements)

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“…Considering that bone marrows are one of the major sources to provide EPCs and enable EPC homing to injured endothelium [30], we supposed that the lower proliferation and migration of EPCs in CAS group manifested the general conditions of the disease, which was similar to the previous ndings in human being [31,32]. Previous clinical ndings suggested that SIRT1 might be protective in CAS patients and in vitro, it could regulate EPC senescence, proliferation, migration and angiogenesis in an oxidative stress cellular model [33].…”

Section: Discussionsupporting

confidence: 77%

Autophagy-Sirtuin1(SIRT1) Modulated The Endothelial Progenitor Cells (EPCs) Proliferation and Migration Via wnt/β-Catenin/GSK3β Signaling Pathway and Alleviated The Coronary Atherosclerosis (CAS) in Mice

Li¹,

Cui²,

Song³

et al. 2021

Preprint

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Background and purpose: SIRT1 exerted its link to CAS risk in humans and EPCs presented its reparative role in CAS. In this study, we explored the role of SIRT1 in CAS mice and also its modulation in EPCs.Methods and materials: ApoE-/- mice were fed with high-fat and high-glucose food to establish the CAS animal model with the normally-raised C57BL/6 mice as a healthy control group. 5 ApoE mice were intravenously injected with SIRT1 activator, SRT 2104 and another 5 were injected with inhibitor Nicotinamide in tail. Weight changes were recorded per week. Blood samples were taken from posterior orbital venous plexus and detected by automatic biochemical analyzer for lipid concentrations. Coronary artery tissues were observed. HE staining displayed the pathological condition while Immunohistochemistry (IHC) evaluated the CD34+/VEGFR2+ relative density. In vitro, EPCs were isolated from bone marrow each group and then purified, cultured and verified using immunofluorescence staining (IFS). Thereafter, we examined the modulatory mechanism of SIRT1 in EPCs by RT-PCR, MTT, Western Blot (WB) and colony formation, scratch methods, connecting the wnt/β-catenin/GSK3β signaling pathway.Results：SIRT1 activation negatively regulated the weight and TC, TG and LDL. SIRT1 activator alleviated the lesion area and decreased the CD34+/VEGFR2+ density which was higher in coronary artery tissues in CAS and SIRT1 inhibitor groups. In vitro, SIRT1 activator promoted the bone marrow-derived EPCs proliferation, migration and activated wnt/β-catenin/GSK3β signaling pathway while inhibited the autophagy biomarkers ATG1 and LC3II. Furthermore, inhibition of autophagy led to the upregulation of SIRT1 and increase in cell proliferation, migration and wnt/β-catenin/GSK3β activity. The suppression of the pathway in turn lowered SIRT1 expression in EPCs, attenuated the cell proliferation and migration and promoted autophagy. Conclusion: Taken all the findings together, this research disclosed that SIRT1 activator might perform its protective role in CAS through autophagy inhibition via wnt/β-catenin/GSK3β signaling pathway in EPCs.

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Section: Discussionsupporting

confidence: 77%

Autophagy-Sirtuin1(SIRT1) Modulated The Endothelial Progenitor Cells (EPCs) Proliferation and Migration Via wnt/β-Catenin/GSK3β Signaling Pathway and Alleviated The Coronary Atherosclerosis (CAS) in Mice

Li¹,

Cui²,

Song³

et al. 2021

Preprint

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“…It has been demonstrated that the increased susceptibility of elderly individuals to ischemic disorders could be mediated, at least in part, by a blunted response of senescent EPCs to hypoxia, which fail to upregulate selected genes related to HIF-1 signaling and glucose uptake (Wu et al, 2018). To this regard, the upregulation of SIRT1 and NRF2 have both been shown to delay EPC senescence and to preserve the proliferative, migratory, and angiogenic activities in senescent EPCs (Lamichane et al, 2019;Wang et al, 2019).…”

Section: Metabolic Features Of Endothelial Cellsmentioning

confidence: 99%

Where Metabolism Meets Senescence: Focus on Endothelial Cells

et al. 2019

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Despite the decline in their proliferative potential, senescent cells display a high metabolic activity. Senescent cells have been shown to acquire a more glycolytic state even in presence of high oxygen levels, in a way similar to cancer cells. The diversion of pyruvate, the final product of glycolysis, away from oxidative phosphorylation results in an altered bioenergetic state and may occur as a response to the enhanced oxidative stress caused by the accumulation of dysfunctional mitochondria. This metabolic shift leads to increased AMP/ATP and ADP/ATP ratios, to the subsequent AMPK activation, and ultimately to p53-mediated growth arrest. Mounting evidences suggest that metabolic reprogramming is critical to direct considerable amounts of energy toward specific activities related to the senescent state, including the senescence-associated secretory phenotype (SASP) and the modulation of immune responses within senescent cell tissue microenvironment. Interestingly, despite the relative abundance of oxygen in the vascular compartment, healthy endothelial cells (ECs) produce most of their ATP content from the anaerobic conversion of glucose to lactate. Their high glycolytic rate further increases during senescence. Alterations in EC metabolism have been identified in age-related diseases (ARDs) associated with a dysfunctional vasculature, including atherosclerosis, type 2 diabetes and cardiovascular diseases. In particular, higher production of reactive oxygen species deriving from a variety of enzymatic sources, including uncoupled endothelial nitric oxide synthase and the electron transport chain, causes DNA damage and activates the NAD +-consuming enzymes polyADP-ribose polymerase 1 (PARP1). These non-physiological mechanisms drive the impairment of the glycolytic flux and the diversion of glycolytic intermediates into many pathological pathways. Of note, accumulation of senescent ECs has been reported in the context of ARDs. Through their pro-oxidant, pro-inflammatory, vasoconstrictor, and prothrombotic activities, they negatively impact on vascular physiology, promoting both the onset and development of ARDs. Here, we review the current knowledge on the cellular senescence-related metabolic changes and their contribution to the mechanisms underlying the pathogenesis of ARDs, with a particular focus on ECs. Moreover, current and potential interventions aimed at modulating EC metabolism, in order to prevent or delay ARD onset, will be discussed.

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“…MHY2233 is another potent Sirt1 activator; it has been proposed to delay the aging process by decreasing senescence-associated β-galactosidase activity and cellular senescence biomarkers. MHY2233 can improve the proliferation, migration, and overall function of EPCs, which is a primary potential strategy in treating cardiovascular disease [144].…”

Section: Sirt1 Activator Modulates Vascular Disease In Preclinical Anmentioning

confidence: 99%

Sirtuin-1 and Its Relevance in Vascular Calcification

Liao

Hou

et al. 2020

IJMS

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Vascular calcification (VC) is highly associated with cardiovascular disease and all-cause mortality in patients with chronic kidney disease. Dysregulation of endothelial cells and vascular smooth muscle cells (VSMCs) is related to VC. Sirtuin-1 (Sirt1) deacetylase encompasses a broad range of transcription factors that are linked to an extended lifespan. Sirt1 enhances endothelial NO synthase and upregulates FoxOs to activate its antioxidant properties and delay cell senescence. Sirt1 reverses osteogenic phenotypic transdifferentiation by influencing RUNX2 expression in VSMCs. Low Sirt1 hardly prevents acetylation by p300 and phosphorylation of β-catenin that, following the facilitation of β-catenin translocation, drives osteogenic phenotypic transdifferentiation. Hyperphosphatemia induces VC by osteogenic conversion, apoptosis, and senescence of VSMCs through the Pit-1 cotransporter, which can be retarded by the sirt1 activator resveratrol. Proinflammatory adipocytokines released from dysfunctional perivascular adipose tissue (PVAT) mediate medial calcification and arterial stiffness. Sirt1 ameliorates release of PVAT adipokines and increases adiponectin secretion, which interact with FoxO 1 against oxidative stress and inflammatory arterial insult. Conclusively, Sirt1 decelerates VC by means of influencing endothelial NO bioavailability, senescence of ECs and VSMCs, osteogenic phenotypic transdifferentiation, apoptosis of VSMCs, ECM deposition, and the inflammatory response of PVAT. Factors that aggravate VC include vitamin D deficiency-related macrophage recruitment and further inflammation responses. Supplementation with vitamin D to adequate levels is beneficial in improving PVAT macrophage infiltration and local inflammation, which further prevents VC.

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MHY2233 Attenuates Replicative Cellular Senescence in Human Endothelial Progenitor Cells via SIRT1 Signaling

Cited by 45 publications

References 55 publications

Autophagy-Sirtuin1(SIRT1) Modulated The Endothelial Progenitor Cells (EPCs) Proliferation and Migration Via wnt/β-Catenin/GSK3β Signaling Pathway and Alleviated The Coronary Atherosclerosis (CAS) in Mice

Autophagy-Sirtuin1(SIRT1) Modulated The Endothelial Progenitor Cells (EPCs) Proliferation and Migration Via wnt/β-Catenin/GSK3β Signaling Pathway and Alleviated The Coronary Atherosclerosis (CAS) in Mice

Where Metabolism Meets Senescence: Focus on Endothelial Cells

Sirtuin-1 and Its Relevance in Vascular Calcification

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