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Trends Cardiovasc Med. 1997 May;7(4):103-10. doi: 10.1016/S1050-1738(97)00001-7.

Molecular and cellular biology of caveolae paradoxes and plasticities.

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1
Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA 02142-1479, USA.

Abstract

Caveolae are 50-100 nm invaginations that represent an appendage or subcompartment of the plasma membrane. They are found in most cell types but are abundant in fibroblasts, adipocytes, endothelial cells, type I pneumocytes, epithelial cells, and smooth and striated muscle cells. Functionally, caveolae have been implicated in three major processes: endothelial transcytosis, potocytosis, and signal transduction. Caveolin, a 21-24 kD integral membrane protein, is a principal component of the caveolar membrane in vivo. Within caveolar microdomains, caveolin functions as a multivalent docking site for recruiting and sequestering signaling molecules. More specifically, caveolin interacts directly in a regulated manner with multiple lipid-modified signaling molecules (such as Src-tyrosine kinases, Gα subunits, and H-Ras), preferring the inactive conformation of these molecules. Here, we present a general overview of our current knowledge of caveolae and caveolin functioning and possible implications for treatment of human disease. (Trends Cardiovasc Med 1997;7:103-110).

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