Cited by 80Cardiac Ischemia and ReperfusionMitochondrial Function and PathologyCell death mechanisms and regulation

HAX-1 regulates cyclophilin-D levels and mitochondria permeability transition pore in the heart

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Lam, Chi Keung, Zhao, Wen, Liu, Guan-Sheng, Cai, Wen-Feng, Gardner, George, Adly, George, Kranias, Evangelia G.·2015·Proceedings of the National Academy of Sciences

Abstract

Significance: The massive cell death, associated with a heart attack, is mainly due to disruption of mitochondrial membrane integrity upon activation of the mitochondrial permeability transition pore. Thus, it is important to understand how this pore is regulated to prevent cardiac cell death. In this study, we reported that hematopoietic-substrate-1 associated protein X-1 (HAX-1) is an inhibitor of the pore and promotes cell survival. HAX-1 works through recruitment of a chaperone protein called Hsp90 from cyclophilin-D, a major component of the pore. Displacement of Hsp90 from cyclophilin-D promotes cyclophilin-D degradation, resulting in inhibition of pore opening and cell death. Given that the opening of the mitochondrial permeability transition pore contributes to various diseases, our findings have broader applications reaching beyond the heart.

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  • CYPD degradation through mechanism initiated by overexpression of HAX1 abolishes MPT-driven necrosis and limits demise of cardiomyocytes experiencing ischemia/reperfusion in vivo.

    “Along similar lines, CYPD degradation through a mechanism initiated by the overexpression of HCLS1 associated protein X-1 (HAX1) abolishes MPT-driven necrosis and limits the demise of cardiomyocytes experiencing ischemia/reperfusion in vivo [385].”

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Authors
Lam, C. K., Zhao, W., Liu, G.-S., Cai, W.-F., Gardner, G., Adly, G., & Kranias, E. G.
Affiliations
  • University of Cincinnati (US)
  • Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0575
Venue
Proceedings of the National Academy of Sciences
Published
2015-11-09
Volume
112
Issue
47
Pages
E6466-75
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2258231082
Cited by
80
References
35
Citations by year
2026: 5 · 2025: 4 · 2024: 11 · 2023: 7 · 2022: 7 · 2021: 10 · 2020: 5 · 2019: 4 · 2018: 11 · 2017: 12 · 2016: 4
FWCI
7.14
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Heart, Lung, and Blood Institute (R01HL026057, R01HL064018, T32HL125204)
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Cardiac Ischemia and Reperfusion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
HAX1, cyclophilin D, mitochondrial permeability transition pore, cardiomyocyte survival, myocardial infarction, ischemia-reperfusion injury, HSP90, ubiquitin-proteasome degradation, oxidative stress, mitochondrial membrane potential, necroptosis
MeSH terms
Peptidyl-Prolyl Isomerase F, Mitochondrial Permeability Transition Pore, Adenoviridae, Animals, Calcium, Heterozygote, Humans, Male, Myocardium, Protein Binding, Proteins, Cell Death, Rats, Sprague-Dawley, Oxidative Stress, HSP90 Heat-Shock Proteins, Protein Transport, Cyclophilins, Myocytes, Cardiac, Mitochondrial Membrane Transport Proteins, Intracellular Signaling Peptides and Proteins, Mitochondrial Membranes, Mice, Ubiquitination, Proteolysis, In Vitro Techniques

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