Cited by 187Mitochondrial Function and PathologyATP Synthase and ATPases ResearchAutophagy in Disease and Therapy

Calcium Overload and Mitochondrial Metabolism

Open access
Walkon, Lauren L., Strubbe-Rivera, Jasiel O., Bazil, Jason N.·2022·Biomolecules

Abstract

Mitochondria calcium is a double-edged sword. While low levels of calcium are essential to maintain optimal rates of ATP production, extreme levels of calcium overcoming the mitochondrial calcium retention capacity leads to loss of mitochondrial function. In moderate amounts, however, ATP synthesis rates are inhibited in a calcium-titratable manner. While the consequences of extreme calcium overload are well-known, the effects on mitochondrial function in the moderately loaded range remain enigmatic. These observations are associated with changes in the mitochondria ultrastructure and cristae network. The present mini review/perspective follows up on previous studies using well-established cryo–electron microscopy and poses an explanation for the observable depressed ATP synthesis rates in mitochondria during calcium-overloaded states. The results presented herein suggest that the inhibition of oxidative phosphorylation is not caused by a direct decoupling of energy metabolism via the opening of a calcium-sensitive, proteinaceous pore but rather a separate but related calcium-dependent phenomenon. Such inhibition during calcium-overloaded states points towards mitochondrial ultrastructural modifications, enzyme activity changes, or an interplay between both events.

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Crossref · 10.3390/biom12121891

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  • Ca2+ activates mitochondrial metabolism and stimulates ATP synthesis.

    “Ca2+ activates mitochondrial metabolism and stimulates ATP synthesis”

    From CYFIP1 governs the development of cortical axons by modulating calcium availability (2025) · cites this paper as [104]

    Section 4 says calcium regulates TCA-cycle enzymes and links calcium homeostasis to ATP production. But the Introduction limits the beneficial effect to relatively low calcium levels; it says calcium overload impairs oxidative phosphorylation and inhibits ATP synthesis. The claim omits that condition and presents stimulation as an unqualified effect. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Mitochondria buffer cytosolic calcium.

    “mitochondria also buffer cytosolic calcium51,103,104.”

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3 of the 95 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. [62]Sophia N. Koerdt A.P.K.A. Volker G. Chapter Three—Annexins and Plasma Membrane Repai Plasma Membrane Repair Andrade L.O. Elsevier Amsterdam, The Netherlands 2019 43 65

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Authors
Walkon, L. L., Strubbe-Rivera, J. O., & Bazil, J. N.
Affiliations
  • Michigan State University (US)
  • Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI 48824, USA
Venue
Biomolecules
Publisher
MDPI AG
Published
2022-12-17
Volume
12
Issue
12
Pages
1891
ISSN
2218-273X (ISSN-L)
OpenAlex
W4313236994
Cited by
187
References
95
Citations by year
2026: 50 · 2025: 75 · 2024: 50 · 2023: 12
FWCI
3.57
Type
journal article
Language
en
Open access
Locations
  • Biomolecules (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Institutes of Health (F31HL152623)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › ATP Synthase and ATPases Research
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
mitochondrial calcium overload, mitochondrial calcium retention capacity, ATP synthesis inhibition, oxidative phosphorylation, mitochondrial ultrastructure, cryo-electron microscopy, mitochondrial function
MeSH terms
Adenosine Triphosphate, Calcium, Energy Metabolism, Mitochondria, Cryoelectron Microscopy

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