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PubMed1975

[Stimulating effect of collagen and collagen derivatives on the propregation and adhesion of thrombocytes in defibrinogenated human citrate plasma and in animal citrate plasma].

Collagen type I form calf skin, collagen modified by pepsin, methylation, succinylation or deamidation and alpha1-chains or cyanogen bromide peptides were studied for their effect on adhesion and spreading of platelets. Some of the proteins increased platelet activity and indicated that the following structural parameters are of importance: 1. triple-helical conformation, 2. non-triple-helical regions, 3. charged amino acid side chains, 4. some activity was also detected for cyanogen bromide peptides of collagen alpha1-chain. The activity of collagen when used in a firbrinogen-free system is comparable to that of fibrinogen and potentiates platelet spreading caused by animal plasma.

Afibrinogenemia↗