Is DRM lipid composition relevant in cell-extracellular matrix adhesion structures?
Focal adhesions mediate cell-extracellular matrix adhesion. They are inserted in detergent-resistant membrane microdomains enriched in phosphatidylinositol-4,5-bisphosphate. In spite of the relevance that membrane lipids appear to have on cell adhesion structures, to our knowledge, there are no previous reports on the membrane lipid composition where focal adhesions are located in vivo or on how changes in local membrane composition contribute to focal adhesion maintenance. This may be due to the fact that the explosion of information in the fields of genomics and proteomics has not been matched by a corresponding advancement of knowledge in the field of lipids. The physiological importance of lipids is illustrated by the numerous diseases to which lipid abnormalities contribute. To gain insight into the role of membrane lipid composition in the preservation of epithelial cell adhesion to the substratum, how specific changes in the membrane lipid composition in vivo affect the maintena
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