Abstract
The shape of adherent cells is the product of two scaffolds: the Intracellular cytoskeleton and the surrounding extracellular matrix. During epithelial morphogenesis, changes In cell shape require modifications in both of these structures. Studies of the components of the cytoskeleton, their Inter-relationships and their response to cell motility and shape changes have provided rich Information about how changes in cytoskeletal organization may take place. Less is known about how extracellular molecules interact with one another, and particularly how the cell regulates these matrix interactions. As an approach to this problem, we are investigating the structure and function of heparan sulfate proteoglycans in mammary eplthellal cells, molecules that are able to bind a variety of matrix molecules, and therefore may have an organizational role in extracellular matrix assembly. Additionally, some are Integrally associated with the plasma membrane, thereby potentially anchoring the cell to the matrix.
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