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Involvement of Ca(2+) channel activity in proliferation of vascular smooth muscle cells

Masanori Sunagawa1

  • 11st Department of Physiology, Unit of Physiological Science, School of Medicine, University of the Ryukyus, 207 Uehara, Nishihara, Okinawa 903-0215, Japan.

Pathophysiology : the Official Journal of the International Society for Pathophysiology
|June 12, 2009
PubMed

Insights

Vascular smooth muscle cell proliferation, driven by calcium (Ca2+), is key to vascular diseases. Voltage-dependent Ca2+ channels (VDCC) play a critical role in regulating this proliferation and associated conditions.

Area of Science:

  • Cardiovascular Biology
  • Cellular Physiology
  • Molecular Medicine

Background:

  • Vascular smooth muscle cell (VSM) proliferation is a critical factor in vascular diseases like atherosclerosis and hypertension.
  • Intracellular signaling pathways, including calcium (Ca2+), regulate VSM cell proliferation.
  • Existing reviews rarely focus specifically on the role of Ca2+ in VSM cell proliferation.

Purpose of the Study:

  • To review the crucial role of intracellular Ca2+ in regulating VSM cell proliferation.
  • To highlight the specific involvement of voltage-dependent Ca2+ channels (VDCC) in VSM cell proliferation.
  • To discuss the implications of VDCC in pathophysiological conditions.

Main Methods:

  • Literature review focusing on Ca2+ signaling and VSM cell proliferation.
  • Analysis of the mechanisms regulating intracellular Ca2+ concentration ([Ca2+]i).
  • Examination of the role of Ca2+ influx through VDCC.

Main Results:

  • Increased cytosolic Ca2+ concentration ([Ca2+]i) via Ca2+ entry is essential for VSM cell proliferation.
  • Elevated [Ca2+]i is required for cell cycle progression (G1/S phase) and cell division (M phase).
  • VDCC are significant regulators of Ca2+ influx, impacting VSM cell proliferation.

Conclusions:

  • VDCC are pivotal in regulating VSM cell proliferation, a key process in vascular disease development.
  • Dysregulation of VDCC contributes to pathophysiological conditions including atherosclerosis, stroke, and renal dysfunction.
  • Understanding VDCC function is crucial for developing therapeutic strategies for vascular diseases.

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