Abstract:
BACKGROUND:CD36 signal transductions have been reported by a variety of lipid moiety of oxidized low-density lipoprotein (oxLDL), however, CD36 signal induced by 7-ketocholesteryl-9-carboxynonanoate (oxLig-1), a lipid moiety of oxLDL has not been elucidated. METHODS AND RESULTS:OxLig-1 leads to activation and recruitment of Src kinase Fyn, Lyn and caveolin-1 to CD36 in J774A.1 cells, but not in CD36 knockdown cells. The mitogen-activated protein (MAP) kinases c-Jun N-terminal kinase 2 (JNK2) and extracellular signal-regulated protein kinase 1 and 2 (ERK1/2) are specifically phosphorylated in J774A.1 cells after treatment with oxLig-1 and inhibited by pretreatment of Src inhibitor, AG1879. The expression of ABCA1 is up-regulated by treatment with oxLig-1in J774A.1 cells, and the increased expression of ABCA1 is dramatically down-regulated by pretreatment with pharmacological inhibitors of ERK (PD98059) and JNK (SP600125). CONCLUSIONS:The specific CD36 signal induced by oxLig-1 initiated the activation of Fyn, Lyn, caveolin-1, JNK2 and ERK1/2, and resulted in the up-regulation of ABCA1.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Li W,Wang D,Chi Y,Wang R,Zhang F,Ma G,Chen Z,Li J,Liu Z,Matsuura E,Liu Qdoi
10.1016/j.atherosclerosis.2012.10.038subject
Has Abstractpub_date
2013-01-01 00:00:00pages
102-9issue
1eissn
0021-9150issn
1879-1484pii
S0021-9150(12)00722-8journal_volume
226pub_type
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