Figure 3. Recruitment of src family kinases to platelet CD36 is essential for oxLDL-mediated signaling.
(A) Human platelets were incubated with the JNK inhibitor SP600125, src inhibitor AG1879, PKC inhibitor GO6983 or PI3K inhibitor LY294002 for 30 minutes prior to incubation with 50 μg/ml oxLDL. The platelet lysates were then analyzed by immunoblot as in figure 1 for JNK phosphorylation. (B) Platelets were incubated with oxLDL or native LDL and then lysed. CD36 was precipitated by FA6 anti-CD36 IgG. Precipitates were analyzed by immunoblot with antibodies to CD36, phospho-src (Y416), Fyn and Lyn. (C) Platelets were incubated with 50 μg/ml oxLDL or native LDL and then lysed. Lyn was immunoprecipitated from lysates and the precipitates were analyzed by immunoblot with a phosphotyrosine antibody (4G10) and Lyn antibody.