Abstract：
:LCY-2-CHO has anti-inflammatory actions on macrophages. To understand its therapeutic implication in atherosclerosis, we examined its effects on the expressions of anti-inflammatory and inflammatory proteins in cultured rat aortic vascular smooth muscle cells (VSMC). LCY-2-CHO is able to induce heme oxygenase-1 (HO-1) protein expression through a transcriptional action. The HO-1 inducting effect of LCY-2-CHO was inhibited by SB203580, N(G)-nitro-l-arginine methylester (l-NAME), and wortmannin, but was not affected by U0126 or SP600125. In accordance LCY-2-CHO increased protein phosphorylation of p38, Akt, and eNOS. Nrf2 is a transcription factor essential for HO-1 gene induction and we showed that LCY-2-CHO is able to cause Nrf2 nuclear translocation and this action depends on p38, Akt and eNOS. In addition to induce anti-inflammatory HO-1, LCY-2-CHO reduced interleukin-1beta (IL-1beta)-induced inflammatory mediators, inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), growth-related oncogene protein-alpha (GRO-alpha), and interleukin-8 (IL-8). Inhibitory effect on IL-1beta-mediated NF-kappaB activation was evidenced by the diminishment of IkappaB kinase (IKK) phosphorylation and IkappaBalpha degradation. In contrast, IL-1beta-mediated ERK and JNK activations were not changed by LCY-2-CHO, while p38 activation by IL-1beta and LCY-2-CHO displayed the non-additivity. Taken together, given the overall anti-inflammatory properties of LCY-2-CHO in VSMC, in terms to induce HO-1 gene expression and inhibit inflammatory gene expression, these results highlight the therapeutic potential of LCY-2-CHO in atherosclerosis.
journal_name
Biochem Pharmacoljournal_title
Biochemical pharmacologyauthors
Ho FM,Kang HC,Lee ST,Chao Y,Chen YC,Huang LJ,Lin WWdoi
10.1016/j.bcp.2007.04.008subject
Has Abstractpub_date
2007-07-15 00:00:00pages
298-308issue
2eissn
0006-2952issn
1873-2968pii
S0006-2952(07)00227-4journal_volume
74pub_type
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