Cited by 126Mitochondrial Function and PathologyCalcium signaling and nucleotide metabolismIon Channels and Receptors

The roles of mitochondria in global and local intracellular calcium signalling

Cartes-Saavedra, Benjamín, Ghosh, Arijita, Hajnóczky, György·2025·Nature Reviews Molecular Cell Biology

Abstract

Activation of Ca 2+ channels in Ca 2+ stores in organelles and the plasma membrane generates cytoplasmic calcium ([Ca 2+]c) signals that control almost every aspect of cell function, including metabolism, vesicle fusion and contraction. Mitochondria have a high capacity for Ca 2+ uptake and chelation, alongside efficient Ca 2+ release mechanisms. Still, mitochondria do not store Ca 2+ in a prolonged manner under physiological conditions and lack the capacity to generate global [Ca 2+]c signals. However, mitochondria take up Ca 2+ at high local [Ca 2+]c signals that originate from neighbouring organelles, and also during sustained global elevations of [Ca 2+]c. Accumulated Ca 2+ in the mitochondria stimulates oxidative metabolism and upon return to the cytoplasm, can produce spatially confined rises in [Ca 2+]c to exert control over processes that are sensitive to Ca 2+. Thus, the mitochondrial handling of [Ca 2+]c is of physiological relevance. Furthermore, dysregulation of mitochondrial Ca 2+ handling can contribute to debilitating diseases. We discuss the mechanisms and relevance of mitochondria in local and global calcium signals.

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Crossref · 10.1038/s41580-024-00820-1

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Authors
Cartes-Saavedra, B., Ghosh, A., & Hajnóczky, G.
Affiliations
Thomas Jefferson University (US)
Corresponding author
Hajnóczky, György
Venue
Nature Reviews Molecular Cell Biology
Published
2025-01-27
Volume
26
Issue
6
Pages
456-475
ISSN
  • 1471-0072 (ISSN-L)
  • 1471-0080
OpenAlex
W4406871717
Cited by
126
References
314
Citations by year
2026: 87 · 2025: 38 · 2024: 1
FWCI
11.06
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Reviews Molecular Cell Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (R03TR004644)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK125897)
  • National Center for Advancing Translational Sciences
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
  • Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
Keywords
mitochondria, intracellular calcium signaling, mitochondrial calcium uptake, mitochondrial calcium release, intracellular calcium stores, calcium channels, intracellular calcium, oxidative metabolism, disease
MeSH terms
Animals, Calcium, Cytoplasm, Humans, Mitochondria, Calcium Channels, Calcium Signaling

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