Composition-controlled artificial collagen shows opposing roles of collagen-binding integrins and discoidin domain receptors in neuronal differentiation of PC12 cells
Collagen, a major component of the extracellular matrix, regulates cellular behaviors, such as adhesion, differentiation, and angiogenesis. These functions are mediated by interactions between specific amino acid motifs within the collagen triple-helical structure and collagen-binding biomolecules. These include cell-surface receptors, such as integrins, discoidin domain receptors (DDRs), and…
Artificial collagen matrices have been engineered to control the roles of collagen-binding integrins and discoidin domain receptors (DDRs) in neuronal differentiation of PC12 cells. These receptors interact with specific amino acid motifs within the collagen triple-helical structure, influencing cell adhesion, differentiation, and angiogenesis.
By tuning the mixing ratios of peptides with distinct receptor-binding sequences before crosslinking, scientists have created matrices with varying compositions of these receptor-binding motifs. The study demonstrates that matrices with only integrin-binding sequences promote neuronal differentiation, while the addition of HSPG-binding sequences has minimal impact.
However, the introduction of a DDR-binding sequence suppresses integrin-mediated differentiation and is associated with DDR phosphorylation. This research highlights the opposing roles of collagen-binding integrins and DDRs in regulating PC12 cell differentiation, and the composition-controlled artificial collagen matrix offers a valuable tool for dissecting functional crosstalk among collagen receptors.
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