Int J Biol Sci 2023; 19(4):1228-1240. doi:10.7150/ijbs.81100 This issue Cite

Research Paper

Transmembrane BAX inhibitor motif containing 6 suppresses presenilin-2 to preserve mitochondrial integrity after myocardial ischemia-reperfusion injury

Li Ma1✉, Lihan Liao1, Na Zhou1, Huikang Tao1, Hao Zhou2, Ying Tan2, Weidan Chen1, Fan Cao1, Xinxin Chen1✉

1. Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Heart Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
2. Department of Cardiology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, 100037, China

Citation:
Ma L, Liao L, Zhou N, Tao H, Zhou H, Tan Y, Chen W, Cao F, Chen X. Transmembrane BAX inhibitor motif containing 6 suppresses presenilin-2 to preserve mitochondrial integrity after myocardial ischemia-reperfusion injury. Int J Biol Sci 2023; 19(4):1228-1240. doi:10.7150/ijbs.81100. https://www.ijbs.com/v19p1228.htm
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Abstract

Graphic abstract

Myocardial ischemia-reperfusion (I/R) damage is characterized by mitochondrial damage in cardiomyocytes. Transmembrane BAX inhibitor motif containing 6 (TMBIM6) and presenilin-2 (PS2) participate in multiple mitochondrial pathways; thus, we investigated the impact of these proteins on mitochondrial homeostasis during an acute reperfusion injury. Myocardial post-ischemic reperfusion stress impaired myocardial function, induced structural abnormalities and promoted cardiomyocyte death by disrupting the mitochondrial integrity in wild-type mice, but not in TMBIM6 transgenic mice. We found that TMBIM6 bound directly to PS2 and promoted its post-transcriptional degradation. Knocking out PS2 in mice reduced I/R injury-induced cardiac dysfunction, inflammatory responses, myocardial swelling and cardiomyocyte death by improving the mitochondrial integrity. These findings demonstrate that sufficient TMBIM6 expression can prevent PS2 accumulation during cardiac I/R injury, thus suppressing reperfusion-induced mitochondrial damage. Therefore, TMBIM6 and PS2 are promising therapeutic targets for the treatment of cardiac reperfusion damage.

Keywords: TMBIM6, PS2, mitochondria, cardiac ischemia/reperfusion injury


Citation styles

APA
Ma, L., Liao, L., Zhou, N., Tao, H., Zhou, H., Tan, Y., Chen, W., Cao, F., Chen, X. (2023). Transmembrane BAX inhibitor motif containing 6 suppresses presenilin-2 to preserve mitochondrial integrity after myocardial ischemia-reperfusion injury. International Journal of Biological Sciences, 19(4), 1228-1240. https://doi.org/10.7150/ijbs.81100.

ACS
Ma, L.; Liao, L.; Zhou, N.; Tao, H.; Zhou, H.; Tan, Y.; Chen, W.; Cao, F.; Chen, X. Transmembrane BAX inhibitor motif containing 6 suppresses presenilin-2 to preserve mitochondrial integrity after myocardial ischemia-reperfusion injury. Int. J. Biol. Sci. 2023, 19 (4), 1228-1240. DOI: 10.7150/ijbs.81100.

NLM
Ma L, Liao L, Zhou N, Tao H, Zhou H, Tan Y, Chen W, Cao F, Chen X. Transmembrane BAX inhibitor motif containing 6 suppresses presenilin-2 to preserve mitochondrial integrity after myocardial ischemia-reperfusion injury. Int J Biol Sci 2023; 19(4):1228-1240. doi:10.7150/ijbs.81100. https://www.ijbs.com/v19p1228.htm

CSE
Ma L, Liao L, Zhou N, Tao H, Zhou H, Tan Y, Chen W, Cao F, Chen X. 2023. Transmembrane BAX inhibitor motif containing 6 suppresses presenilin-2 to preserve mitochondrial integrity after myocardial ischemia-reperfusion injury. Int J Biol Sci. 19(4):1228-1240.

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