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Gong J, Sun P, Li L, Zou Z, Wu Q, Sun L, Li H, Gu Z, Su L. Heat stress suppresses MnSOD expression via p53-Sp1 interaction and induces oxidative stress damage in endothelial cells: Protective effects of MitoQ10 and Pifithrin-α. Heliyon 2023; 9:e22805. [PMID: 38125505 PMCID: PMC10730713 DOI: 10.1016/j.heliyon.2023.e22805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 11/20/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023] Open
Abstract
Aim To investigate the mechanism of p53-mediated suppression of heat stress-induced oxidative stress damage by manganese superoxide dismutase (MnSOD) in endothelial cells (ECs). Methods Primary ECs isolated from mouse aortas were used to examine the effects of heat stress on vascular ECs viability and apoptosis. We measured MnSOD expression, reactive oxygen species (ROS) production, p53 expression, viability, and apoptosis of heat stress-induced ECs. We also tested the protective effects of MitoQ10, a mitochondrial-targeted antioxidant, and Pifithrin-α, a p53 inhibitor, in ECs from a mouse model of heat stroke. Results Heat stress increased cellular apoptosis, ROS production, and p53 expression, while reducing cellular viability and MnSOD expression in ECs. We also showed that the suppression of MnSOD expression by heat stress in ECs was mediated by interactions between p53 and Sp1. Furthermore, MitoQ10 and Pifithrin-α alleviated heat stress-induced oxidative stress and apoptosis in ECs. Conclusion Our results revealed that p53-mediated MnSOD downregulation is a key mechanism for heat stress-induced oxidative stress damage in ECs and indicated that MitoQ10 and Pifithrin-α could be potential therapeutic agents for heat stroke.
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Affiliation(s)
- Jian Gong
- Department of Critical Care Medicine, The First School of Clinical Medicine, Southern Medical University (General Hospital of Southern Theater Command of PLA), Guangzhou, 510515, China
- Department of Intensive Care Medicine, The Third People's Hospital of Longgang District, Shenzhen, 518115, China
| | - Peipei Sun
- Department of Intensive Care Medicine, The Third People's Hospital of Longgang District, Shenzhen, 518115, China
| | - Li Li
- Department of Treatment Center for Traumatic Injuries, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, China
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degenerative Diseases, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, China
| | - Zhimin Zou
- Department of Treatment Center for Traumatic Injuries, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, China
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degenerative Diseases, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, China
| | - Qihua Wu
- Department of Intensive Care Medicine, The Third People's Hospital of Longgang District, Shenzhen, 518115, China
| | - Liyun Sun
- Department of Intensive Care Medicine, The Third People's Hospital of Longgang District, Shenzhen, 518115, China
| | - Hui Li
- Department of Critical Care Medicine, The First School of Clinical Medicine, Southern Medical University (General Hospital of Southern Theater Command of PLA), Guangzhou, 510515, China
- Key Laboratory of Hot Zone Trauma Care and Tissue Repair of PLA, Guangzhou, 510515, China
| | - Zhengtao Gu
- Department of Treatment Center for Traumatic Injuries, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, China
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degenerative Diseases, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, China
| | - Lei Su
- Department of Critical Care Medicine, The First School of Clinical Medicine, Southern Medical University (General Hospital of Southern Theater Command of PLA), Guangzhou, 510515, China
- Key Laboratory of Hot Zone Trauma Care and Tissue Repair of PLA, Guangzhou, 510515, China
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