Vascular smooth muscle function and its changes in hypertension

D. F. Bohr, R Clinton Webb

Research output: Contribution to journalReview article

77 Citations (Scopus)

Abstract

The contractile state of vascular smooth muscle influences arterial blood pressure and regulates organ blood flow. Current evidence suggests that the contractile apparatus of vascular smooth muscle is composed of thin and thick filaments, and that force generated between these two filaments provides the mechanism for cell shortening. The molecular events that initiate the interaction between these filaments are dependent upon the free sarcoplasmic concentration of activator calcium, which is regulated by the cell membrane and at subcellular sites. Changes in electrical activity of the cell membrane and interaction of pharmacologic agents with membrane receptor alter the cell, causing either a decrease or increase in sarcoplasmic calcium concentration and thus changing the contractile state of the vascular smooth muscle cell. Alterations in the cellular mechanisms that regulate intracellular calcium concentration may contribute to abnormal vascular function in pathologic states. In this brief review, the normal mechanism of vascular smooth muscle contraction is described, and the evidence that indicates that components of the contractile process change in hypertension is examined.

Original languageEnglish (US)
Pages (from-to)3-16
Number of pages14
JournalAmerican Journal of Medicine
Volume77
Issue number4 A
StatePublished - Jan 1 1984
Externally publishedYes

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Vascular Smooth Muscle
Hypertension
Calcium
Cell Membrane
Muscle Contraction
Cell Communication
Smooth Muscle Myocytes
Blood Vessels
Arterial Pressure
Membranes

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Vascular smooth muscle function and its changes in hypertension. / Bohr, D. F.; Webb, R Clinton.

In: American Journal of Medicine, Vol. 77, No. 4 A, 01.01.1984, p. 3-16.

Research output: Contribution to journalReview article

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