Objective To study the inhibitory effect of curcumin on the proliferation,migration and invasion of non-small cell lung cancer cell A549,and to discuss further if it is closely related to the expression of c-Jun N-terminal kinase (JNK) and relative protein p38.Methods A549 cells were cultured by conventional method,and then treated with different concentration of curcumin (10,20,40,80 μmol · L-1).The proliferation,migration and invasion of A549 cells were measured by real-time cellular analysis (RTCA).The expression levels of JNK,p-JNK,p38 and P-p38 were detected by real-time PCR and Western blotting.Results Curcumin showed an antiproliferation effect against A549 cells with IC50 =40 μmol · L-1,and curcumin exhibited obviously inhibitory effect on the migration and invasion of A549 cells.Additionally,compared with control group,curcumin suppressed the expression of JNK and p38 at the gene level,and significantly inhibited the expression of JNK,P-JNK,p38 and p38 (P＜0.05) at the protein level.Conclusion These results demonstrated that curcumin can inhibit the proliferation,migration and invasion of A549 cells via reducing the level of JNK,p38 phosphorylation,and blocking JNK signal transduction pathway.

Objective To investigate the influence of curcumin and its analogue H8 on glucose and lipid metabolism disorder in db/db mice. Methods The type 2 diabetes mouse model (db/db mice) was intragastrically administrated with curcumin and analogue H8 for 8 weeks.The blood biochemical indexes were measured.The expression of PEPCK and G6Pase mRNA was detected by real-time PCR in liver tissues.The expression of PEPCK and G6Pase protein was detected by Western blotting. Results Curcumin analogue H8 reduced blood glucose and lipids in db/db mice (P<0.01) and improved liver function related enzymes significantly.The levels of PEPCK and G6Pase mRNA in db/db mice were significantly decreased (P<0.01) and the expression levels of PEPCK and G6Pase protein were significantly decreased(P<0.01). Conclusion Curcumin analogue H8 improves the glucose and lipid metabolism disorder in db/db mice,and it is related to inhibiting the expression of PEPCK and G6Pase gene and protein.