Background and AIMS: Inflammation has been recognized to have a role in
the process of atherosclerosis. Although evidence indicates that
atorvastatin has anti-inflammatory effects besides cholesterol-lowering
ability in atherosclerosis, the specific mechanisms of atorvastatin in
inflammation requires further discussion. METHODS: Here, we explored the
effects and mechanisms of atorvastatin on inflammation in human
umbilical vein endothelial cells through quantitative real-time PCR and
western blot analyses. In addition, microarray analysis and
immunohistochemistry were used to analyze the expression of Crim1 in
atherosclerotic plaques. RESULTS: Cysteine-rich motor neuron 1 (Crim1)
mRNA was upregulated 36.68 fold (P<0.001), and Crim1 protein
was upregulated 3.63 fold (p<0.001), in human atherosclerotic
plaques compared with normal intima tissues. Bioinformatics analysis
revealed Crim1 co-expression with IL-6, TNF-α and NF-κB. Atorvastatin
dramatically downregulated the mRNA and protein levels of Crim1 and
inhibited inflammation by decreasing the levels of IL-6, TNF-α and
NF-κB. Knockdown of Crim1 significantly inhibited IL-6, TNF-α and NF-κB
expression, whereas overexpression of Crim1 upregulated IL-6, TNF-α and
NF-κB expression. In addition, the inhibitory effects of atorvastatin on
inflammation were markedly offset by overexpression of Crim1.
CONCLUSION: These results demonstrated that atorvastatin
decreases inflammation via the Crim1 pathway in HUVECs, thus, providing
a new prospect for the use of atorvastatin for non-lipid lowering
functions, and new directions for the prevention and therapy of
atherosclerosis.