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Related Experiment Video

Updated: Dec 25, 2025

Isolation of Human Myoblasts, Assessment of Myogenic Differentiation, and Store-operated Calcium Entry Measurement
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TRPCs: Influential Mediators in Skeletal Muscle.

Jun Hee Choi1,2, Seung Yeon Jeong1,2, Mi Ri Oh1,2

  • 1Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea.

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|April 5, 2020
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Summary

Calcium (Ca2+) is vital for skeletal muscle function. This review examines how extracellular Ca2+ entry, particularly via transient receptor potential canonical (TRPC) channels, impacts muscle cells and diseases like Duchenne muscular dystrophy (DMD).

Keywords:
Ca2+ entryDuchenne muscular dystrophySOCETRPCskeletal muscle

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Area of Science:

  • Cellular Biology
  • Muscle Physiology
  • Ion Channel Function

Background:

  • Calcium ions (Ca2+) and Ca2+-dependent pathways are crucial for cellular processes, including skeletal muscle contraction.
  • Regulation of intracellular Ca2+ between the cytosol and sarcoplasmic reticulum (SR) is essential for skeletal muscle function.
  • Extracellular Ca2+ entry into skeletal muscle cells has been a significant research focus since the early 1990s.

Purpose of the Study:

  • To review studies on channel proteins mediating extracellular Ca2+ entry into skeletal muscle cells.
  • To highlight the role of transient receptor potential canonical (TRPC) proteins in store-operated Ca2+ entry (SOCE) under normal conditions.
  • To explore the abnormal properties of TRPC channels in muscle diseases, specifically Duchenne muscular dystrophy (DMD).

Main Methods:

  • Review of studies utilizing skeletal myoblasts, myotubes, fibers, tissue, and skeletal muscle-originated cell lines.
  • Analysis of research focusing on channel proteins involved in extracellular Ca2+ influx.
  • Examination of the function of TRPC proteins in Ca2+ signaling pathways.

Main Results:

  • TRPC proteins are proposed to function as store-operated Ca2+ entry (SOCE) channels in skeletal muscle cells.
  • Abnormalities in TRPC channel properties may be linked to muscle diseases like DMD.
  • Extracellular Ca2+ entry contributes significantly to skeletal muscle physiology.

Conclusions:

  • TRPC channels play a critical role in regulating Ca2+ homeostasis in skeletal muscle.
  • Dysfunctional TRPC channels are implicated in the pathophysiology of muscular dystrophies.
  • Understanding extracellular Ca2+ entry mechanisms is key to addressing muscle diseases.