Am J Physiol Cell Physiol AJP: Heart and Circulatory Physiology
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Am J Physiol Cell Physiol 294: C869-C878, 2008. First published February 6, 2008; doi:10.1152/ajpcell.00154.2007
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INVITED REVIEW

Intermediate filaments in smooth muscle

Dale D. Tang

Center for Cardiovascular Sciences, Albany Medical College, Albany, New York

Submitted 12 April 2007 ; accepted in final form 1 February 2008

The intermediate filament (IF) network is one of the three cytoskeletal systems in smooth muscle. The type III IF proteins vimentin and desmin are major constituents of the network in smooth muscle cells and tissues. Lack of vimentin or desmin impairs contractile ability of various smooth muscle preparations, implying their important role for smooth muscle force development. The IF framework has long been viewed as a fixed cytostructure that solely provides mechanical integrity for the cell. However, recent studies suggest that the IF cytoskeleton is dynamic in mammalian cells in response to various external stimulation. In this review, the structure and biological properties of IF proteins in smooth muscle are summarized. The role of IF proteins in the modulation of smooth muscle force development and redistribution/translocation of signaling partners (such as p130 Crk-associated substrate, CAS) is depicted. This review also summarizes our latest understanding on how the IF network may be regulated in smooth muscle.

cytoskeleton; force development; vimentin; desmin


Address for reprint requests and other correspondence: D. D. Tang, Center for Cardiovascular Sciences, Albany Medical College, 47 New Scotland Ave., MC-8, Albany, NY 12208 (e-mail: tangd{at}mail.amc.edu)




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