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Asynchronous calcium waves in smooth muscle cells.

Cheng-Han Lee1, Kuo-Hsing Kuo, Jiazhen Dai

  • 1The James Hogg iCAPTURE Centre for Cardiovascular and Pulmonary Research, University of British Columbia, St. Paul's Hospital, Vancouver, BC, Canada.

Canadian Journal of Physiology and Pharmacology
|December 8, 2005
PubMed
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Asynchronous calcium (Ca2+) waves in smooth muscle cells regulate contraction and relaxation. These waves involve calcium release and uptake by the sarcoplasmic reticulum, supported by calcium entry across the cell membrane.

Area of Science:

  • Cellular Physiology
  • Biochemistry
  • Muscle Biology

Background:

  • Asynchronous Ca2+ waves, or [Ca2+]i oscillations, are a specialized signaling mechanism in various smooth muscle cells.
  • This signaling plays a dual role in smooth muscle function, mediating both tonic contraction and relaxation.

Purpose of the Study:

  • To review the phenomenon of asynchronous Ca2+ waves in smooth muscle.
  • To discuss the scientific and clinical significance of this Ca2+ signaling pathway.

Main Methods:

  • Review of existing literature on Ca2+ wave mechanisms in smooth muscle.
  • Analysis of the roles of sarcoplasmic reticulum Ca2+ handling and plasmalemmal Ca2+ entry.

Main Results:

  • Repetitive Ca2+ waves result from cycles of Ca2+ release from and uptake into the sarcoplasmic reticulum.

Related Experiment Videos

  • Plasmalemmal Ca2+ entry is crucial for refilling the sarcoplasmic reticulum and sustaining Ca2+ waves.

    • Conclusions:

    • Asynchronous Ca2+ waves are a key signaling mechanism in smooth muscle, impacting contractile states.
    • Understanding these Ca2+ dynamics offers insights into smooth muscle physiology and potential clinical applications.