Cited by 66Cell death mechanisms and regulationMitochondrial Function and PathologyIon Channels and Receptors

Bcl-2 family in inter-organelle modulation of calcium signaling; roles in bioenergetics and cell survival

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Lewis, Abasha, Hayashi, Teruo, Su, Tsung-Ping, Betenbaugh, Michael J.·2014·Journal of Bioenergetics and Biomembranes

Abstract

Bcl-2 family proteins, known for their apoptosis functioning at the mitochondria, have been shown to localize to other cellular compartments to mediate calcium (Ca2+) signals. Since the proper supply of Ca2+ in cells serves as an important mechanism for cellular survival and bioenergetics, we propose an integrating role for Bcl-2 family proteins in modulating Ca2+ signaling. The endoplasmic reticulum (ER) is the main Ca2+ storage for the cell and Bcl-2 family proteins competitively regulate its Ca2+ concentration. Bcl-2 family proteins also regulate the flux of Ca2+ from the ER by physically interacting with inositol 1,4,5-trisphosphate receptors (IP3Rs) to mediate their opening. Type 1 IP3Rs reside at the bulk ER to coordinate cytosolic Ca2+ signals, while type 3 IP3Rs reside at mitochondria-associated ER membrane (MAM) to facilitate mitochondrial Ca2+ uptake. In healthy cells, mitochondrial Ca2+ drives pyruvate into the citric acid (TCA) cycle to facilitate ATP production, while a continuous accumulation of Ca2+ can trigger the release of cytochrome c, thus initiating apoptosis. Since multiple organelles and Bcl-2 family proteins are involved in Ca2+ signaling, we aim to clarify the role that Bcl-2 family proteins play in facilitating Ca2+ signaling and how mitochondrial Ca2+ is relevant in both bioenergetics and apoptosis. We also explore how these insights could be useful in controlling bioenergetics in apoptosis-resistant cell lines.

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Authors
Lewis, A., Hayashi, T., Su, T.-P., & Betenbaugh, M. J.
Affiliations
  • United States Department of Health and Human Services (US)
  • Nishikawa Hospital (JP)
  • Johns Hopkins University (US)
Corresponding author
Lewis, Abasha
Venue
Journal of Bioenergetics and Biomembranes
Published
2013-09-28
Volume
46
Issue
1
Pages
1-15
ISSN
  • 0145-479X (ISSN-L)
  • 1573-6881
OpenAlex
W1992497384
Cited by
66
References
125
Citations by year
2026: 2 · 2025: 3 · 2024: 5 · 2023: 6 · 2022: 3 · 2021: 11 · 2020: 10 · 2019: 4 · 2018: 5 · 2017: 5 · 2016: 7 · 2015: 4 · 2014: 1
FWCI
0.38
Type
journal article
Language
en
Open access
Locations
  • Journal of Bioenergetics and Biomembranes (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute on Drug Abuse (ZIADA000206)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
Keywords
Bcl-2 family proteins, calcium signaling, endoplasmic reticulum, IP3 receptor, mitochondria-associated ER membranes, mitochondrial calcium uptake, cytochrome c release, apoptosis, bioenergetics, TCA cycle, intracellular calcium, apoptosis resistance
MeSH terms
Animals, Calcium, Cell Survival, Energy Metabolism, Humans, Mitochondria, Apoptosis, Proto-Oncogene Proteins c-bcl-2, Calcium Signaling

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