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• W1556681331 endingPage "236" @default.
• W1556681331 startingPage "205" @default.
• W1556681331 abstract "Cell behavior is strongly influenced by the extracellular matrix (ECM) to which cells adhere. Both chemical determinants within ECM molecules and mechanical properties of the ECM network regulate cellular response, including proliferation, differentiation, and apoptosis. Type I collagen is the most abundant ECM protein in the body with a complex structure that can be altered in vivo by proteolysis, cross‐linking, and other processes. Because of collagen's complex and dynamic nature, it is important to define the changes in cell response to different collagen structures and its underlying mechanisms. This chapter reviews current knowledge of potential mechanisms by which type I collagen affects cell behavior, and it presents data that elucidate specific intracellular signaling pathways by which changes in type I collagen structure differentially regulate hepatocyte cell cycle progression and differentiation. A network of polymerized fibrillar type I collagen (collagen gel) induces a highly differentiated but growth‐arrested phenotype in primary hepatocytes, whereas a film of monomeric collagen adsorbed to a rigid dish promotes cell cycle progression and dedifferentiation. Studies presented here demonstrate that protein kinase A (PKA) activity is significantly elevated in hepatocytes on type I collagen gel relative to collagen film, and inhibition of this elevated PKA activity can promote hepatocyte cell cycle progression on collagen gel. Additional studies are presented that examine changes in hepatocyte cell cycle progression and differentiation in response to increased rigidity of polymerized collagen gel by fiber cross‐linking. Potential mechanisms underlying these cellular responses and their implications are discussed." @default.
• W1556681331 created "2016-06-24" @default.
• W1556681331 creator A5001287938 @default.
• W1556681331 creator A5003285012 @default.
• W1556681331 creator A5079186353 @default.
• W1556681331 date "2005-01-01" @default.
• W1556681331 modified "2023-10-17" @default.
• W1556681331 title "Regulation of Hepatocyte Cell Cycle Progression and Differentiation by Type I Collagen Structure" @default.
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