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Li H, Yang Z, Liang W, Nie H, Guan Y, Yang N, Ji T, Liu Y, Huang Y, Zhang L, Yan J, Zhang C. DHCR24 Insufficiency Promotes Vascular Endothelial Cell Senescence and Endothelial Dysfunction via Inhibition of Caveolin-1/ERK Signaling. J Gerontol A Biol Sci Med Sci 2024; 79:glae059. [PMID: 38407305 PMCID: PMC10949436 DOI: 10.1093/gerona/glae059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Indexed: 02/27/2024] Open
Abstract
Endothelial cells (ECs) senescence is critical for vascular dysfunction, which leads to age-related disease. DHCR24, a 3β-hydroxysterol δ 24 reductase with multiple functions other than enzymatic activity, has been involved in age-related disease. However, little is known about the relationship between DHCR24 and vascular ECs senescence. We revealed that DHCR24 expression is chronologically decreased in senescent human umbilical vein endothelial cells (HUVECs) and the aortas of aged mice. ECs senescence in endothelium-specific DHCR24 knockout mice was characterized by increased P16 and senescence-associated secretory phenotype, decreased SIRT1 and cell proliferation, impaired endothelium-dependent relaxation, and elevated blood pressure. In vitro, DHCR24 knockdown in young HUVECs resulted in a similar senescence phenotype. DHCR24 deficiency impaired endothelial migration and tube formation and reduced nitric oxide (NO) levels. DHCR24 suppression also inhibited the caveolin-1/ERK signaling, probably responsible for increased reactive oxygen species production and decreased eNOS/NO. Conversely, DHCR24 overexpression enhanced this signaling pathway, blunted the senescence phenotype, and improved cellular function in senescent cells, effectively blocked by the ERK inhibitor U0126. Moreover, desmosterol accumulation induced by DHCR24 deficiency promoted HUVECs senescence and inhibited caveolin-1/ERK signaling. Our findings demonstrate that DHCR24 is essential in ECs senescence.
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Affiliation(s)
- Han Li
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Zhen Yang
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
- Department of Geriatrics, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Wukaiyang Liang
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Hao Nie
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
- Department of Geriatrics, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Yuqi Guan
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
- Department of Geriatrics, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Ni Yang
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Tianyi Ji
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Yu Liu
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
- Department of Geriatrics, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Yi Huang
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
- Department of Geriatrics, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Le Zhang
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
- Department of Geriatrics, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Jinhua Yan
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
- Department of Geriatrics, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Cuntai Zhang
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
- Department of Geriatrics, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
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Li X, Zhao C, Liu W, Zhu Q, Mu L, Ma C. BANP Participates in the Chronic Intermittent Hypoxia-Induced Senescence of Vascular Endothelial Cells by Promoting P53 Phosphorylation and Nuclear Retention. Gerontology 2024; 70:302-317. [PMID: 38168028 DOI: 10.1159/000535804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 12/07/2023] [Indexed: 01/05/2024] Open
Abstract
INTRODUCTION The objective of this study was to examine the potential induction of senescence in vascular endothelial cells (VECs) by chronic intermittent hypoxia (CIH), a defining characteristic of obstructive sleep apnea (OSA). This investigation seeks to elucidate the underlying mechanisms that contribute to the development of cardiovascular diseases in patients with OSA, with a particular focus on CIH-induced vascular aging. METHODS The BioSpherix-OxyCycler system was used to establish models of CIH in both rats and human umbilical vein endothelial cells (HUVECs). To assess VECs' senescence, various methods were employed including EdU incorporation assay, cell cycle analysis, senescence-associated β-galactosidase (SA-β-gal) staining, and senescence protein testing. Vascular aging was evaluated through measurements of carotid-femoral pulse wave velocity, intima-media thickness, and Ki67 immunohistochemical staining. In order to identify the molecular mechanisms associated with CIH-induced senescence in VECs, a bioinformatics study was conducted utilizing the Gene Expression Omnibus database. RESULTS Under conditions of CIH, HUVECs exhibited inhibited proliferation, arrested cell cycle, increased activity of SA-β-gal, and elevated expression levels of p53 and p21 compared to HUVECs under normoxic conditions. Similarly, rats exposed to CIH displayed increased carotid-femoral pulse wave velocity, intima-media thickness, vascular permeability, and SA-β-gal activity in VECs, along with decreased expression of arterial Ki67. BTG3-associated protein (BANP) was found to be highly expressed in CIH-induced VECs. Furthermore, the overexpression of BANP resulted in the senescence of VECs, along with elevated levels of p53 phosphorylation and nuclear localization. CONCLUSIONS These findings demonstrate that CIH can induce VECs senescence and contribute to vascular aging. Additionally, BANP can induce VECs senescence by promoting p53 phosphorylation and nuclear retention. These discoveries offer novel insights into the increased cardiovascular risk associated with OSA, thereby presenting new possibilities for therapeutic intervention.
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Affiliation(s)
- Xinxin Li
- Key Laboratory of Diagnostic Imaging and Interventional Radiology, Shenyang, China
- Clinical Medical Research Center of Imaging in Liaoning Province, Shenyang, China
- Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, China
| | - Cuiting Zhao
- Key Laboratory of Diagnostic Imaging and Interventional Radiology, Shenyang, China
- Clinical Medical Research Center of Imaging in Liaoning Province, Shenyang, China
- Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, China
| | - Wen Liu
- Key Laboratory of Diagnostic Imaging and Interventional Radiology, Shenyang, China
- Clinical Medical Research Center of Imaging in Liaoning Province, Shenyang, China
- Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, China
| | - Qing Zhu
- Key Laboratory of Diagnostic Imaging and Interventional Radiology, Shenyang, China
- Clinical Medical Research Center of Imaging in Liaoning Province, Shenyang, China
- Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, China
| | - Lixin Mu
- Key Laboratory of Diagnostic Imaging and Interventional Radiology, Shenyang, China
- Clinical Medical Research Center of Imaging in Liaoning Province, Shenyang, China
- Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, China
| | - Chunyan Ma
- Key Laboratory of Diagnostic Imaging and Interventional Radiology, Shenyang, China
- Clinical Medical Research Center of Imaging in Liaoning Province, Shenyang, China
- Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, China
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