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Responsiveness of vascular endothelium to shear stress: potential role of ion channels and cellular cytoskeleton (review).

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The frictional forces associated with blood flow expose vascular endothelium in arteries to a complex and highly dynamic shear stress distribution. The ability of endothelial cells to respond to shear stress is essential for arterial vasoregulation in response to acute hemodynamic changes and for vascular wall remodeling following chronic changes in blood flow. Furthermore, endothelial responsiveness to shear stress may play a role in the localization of early atherosclerotic lesions. Shear stress elicits a wide range of humoral, metabolic, and structural responses in endothelial cells. These include activation of ion channels and of G proteins, induction of oscillations in intracellular calcium concentration, alterations in the expression of various important genes, and extensive cytoskeletal reorganization. Mechanisms of shear stress sensing and transmission in endothelium are discussed in light of the complex shear stress distribution to which endothelial cells are exposed in vivo and with particular emphasis on the potentially central role of flow-sensitive ion channels and the cellular cytoskeleton. Finally, the ability of endothelial cells to distinguish among and to respond differentially to different types of shear stress is highlighted.
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Document Type: Research Article

Affiliations: Department of Mechanical and Aeronautical Engineering, University of California, Davis, CA 95616, USA.

Publication date: October 1, 1999

More about this publication?
  • The International Journal of Molecular Medicine is a monthly, peer-reviewed journal devoted to the publication of high quality studies related to the molecular mechanisms of human disease. The journal welcomes research on all aspects of molecular and clinical research, ranging from biochemistry to immunology, pathology, genetics, human genomics, microbiology, molecular pathogenesis, molecular cardiology, molecular surgery and molecular psychology.

    The International Journal of Molecular Medicine aims to provide an insight for researchers within the community in regard to developing molecular tools and identifying molecular targets for the diagnosis and treatment of a diverse number of human diseases.
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