Cited by 384Mitochondrial Function and PathologyCardiac Ischemia and ReperfusionCardiac electrophysiology and arrhythmias

The Mitochondrial Calcium Uniporter Matches Energetic Supply with Cardiac Workload during Stress and Modulates Permeability Transition

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Luongo, Timothy S., Lambert, Jonathan P., Yuan, Ancai, Zhang, Xueqian, Gross, Polina, Song, Jianliang, Shanmughapriya, Santhanam, Gao, Erhe +6 more·2015·Cell Reports

Abstract

Cardiac contractility is mediated by a variable flux in intracellular calcium (Ca(2+)), thought to be integrated into mitochondria via the mitochondrial calcium uniporter (MCU) channel to match energetic demand. Here, we examine a conditional, cardiomyocyte-specific, mutant mouse lacking Mcu, the pore-forming subunit of the MCU channel, in adulthood. Mcu(-/-) mice display no overt baseline phenotype and are protected against mCa(2+) overload in an in vivo myocardial ischemia-reperfusion injury model by preventing the activation of the mitochondrial permeability transition pore, decreasing infarct size, and preserving cardiac function. In addition, we find that Mcu(-/-) mice lack contractile responsiveness to acute β-adrenergic receptor stimulation and in parallel are unable to activate mitochondrial dehydrogenases and display reduced bioenergetic reserve capacity. These results support the hypothesis that MCU may be dispensable for homeostatic cardiac function but required to modulate Ca(2+)-dependent metabolism during acute stress.

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Crossref · 10.1016/j.celrep.2015.06.017

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Authors
Luongo, T. S., Lambert, J. P., Yuan, A., Zhang, X., Gross, P., Song, J., Shanmughapriya, S., Gao, E., Jain, M., Houser, S. R., Koch, W. J., Cheung, J. Y., Madesh, M., & Elrod, J. W.
Affiliations
  • Temple University (US)
  • University of California San Diego (US)
Corresponding author
Elrod, John W.
Venue
Cell Reports
Publisher
Elsevier BV
Published
2015-07
Volume
12
Issue
1
Pages
23-34
ISSN
2211-1247 (ISSN-L)
OpenAlex
W1622243645
Cited by
384
References
52
Citations by year
2026: 19 · 2025: 34 · 2024: 25 · 2023: 38 · 2022: 26 · 2021: 49 · 2020: 43 · 2019: 39 · 2018: 43 · 2017: 35 · 2016: 28 · 2015: 5
FWCI
16.06
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • eScholarship (California Digital Library) (submittedVersion, cc-by)
Funders
  • National Heart, Lung, and Blood Institute (R01HL123966, P01HL091799, HL123966, R01HL119306)
  • National Institute on Drug Abuse (P01DA037830)
  • National Institute of General Medical Sciences (R01GM109882)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Cardiac Ischemia and Reperfusion
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
Keywords
mitochondrial calcium uniporter, cardiomyocytes, mitochondrial permeability transition pore, myocardial ischemia-reperfusion injury, intracellular calcium, cardiac contractility, beta-adrenergic signaling, mitochondrial dehydrogenases, infarct size
MeSH terms
Animals, Calcium, Cells, Cultured, Energy Metabolism, Mice, Inbred C57BL, Myocardial Contraction, Stress, Physiological, Calcium Channels, Myocardial Reperfusion Injury, Myocytes, Cardiac, Mice

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