IP(3) Receptors, Mitochondria, and Ca Signaling: Implications for Aging

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Ex Vivo Assessment of Contractility, Fatigability and Alternans in Isolated Skeletal Muscles
14:02

Ex Vivo Assessment of Contractility, Fatigability and Alternans in Isolated Skeletal Muscles

Published on: November 1, 2012

Jean-Paul Decuypere1, Giovanni Monaco, Ludwig Missiaen

  • 1Laboratory of Molecular and Cellular Signaling, Department of Molecular and Cellular Biology, K.U.Leuven, Campus Gasthuisberg O/N-1, Herestraat 49, Bus 802, 3000 Leuven, Belgium.

Journal of Aging Research
|March 23, 2011
PubMed

Insights

Cellular calcium (Ca2+) signaling, controlled by the endoplasmic reticulum and mitochondria, impacts cell death and survival. Aging and oxidative stress disrupt this signaling, contributing to cellular dysfunction.

Area of Science:

  • Cellular Biology
  • Biochemistry
  • Aging Research

Background:

  • The interplay between endoplasmic reticulum (ER) and mitochondria governs calcium (Ca2+) signaling, crucial for cellular health and fate.
  • Proteins modulating apoptosis and autophagy influence intracellular Ca2+ dynamics and homeostasis.
  • Aging introduces oxidative stress, impairing ER and mitochondrial function and Ca2+ signaling.

Purpose of the Study:

  • To elucidate mechanisms controlling intracellular Ca2+ signaling in relation to apoptosis and autophagy.
  • To review the impact of aging and oxidative stress on these Ca2+ signaling pathways.

Main Methods:

  • Literature review and synthesis of existing research on Ca2+ signaling, apoptosis, autophagy, aging, and oxidative stress.
  • Analysis of protein interactions affecting Ca2+ release and uptake mechanisms.

Main Results:

  • Aging-associated oxidative stress exacerbates mitochondrial dysfunction and damage.
  • Disrupted ER-mitochondria Ca2+ crosstalk contributes to cellular aging.
  • Impaired Ca2+ homeostasis affects apoptosis and autophagy regulation during aging.

Conclusions:

  • Mitochondrial dysfunction is a significant factor in the aging process.
  • Reactive oxygen species accumulation during aging disrupts ER-mitochondrial Ca2+ signaling, impacting cellular fate.
  • Understanding these pathways is vital for developing interventions against age-related cellular decline.

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