Abstract
The study addressed to understand whether or not lipoproteins at low concentrations could modulate Receptor-'C' dependent platelet signalling revealed that LDL, like exogenous cholesterol, had the capacity to initiate PLD-dependent platelet signalling in a dose dependent fashion and this effect was inhibited in presence of HDL; cAMP; DTT; Zn++ and butanol whereas cGMP had no effect upon this PLD-dependent signalling. Further Receptor 'C' from platelet in the purified-form displayed LDL-or cholesterol-dependent autophosphorylation at the tyrosine residues and this Receptor-'C' tyrosine kinase (Receptor-Ck) activity contributed to the observed LDL-or cholesterol -dependent PLD activity in human platelets. Based upon these results coupled with earlier results, an attempt was made to define the lipoprotein-dependent platelet signalling pathway.
Published Version
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