RESUMO
Objective:To study confirm whether curcumin could inhibit the proliferation of CD44+colon cancer cells. In this study. Methods: MTT method was used to test the proliferation inhibition effects of curcumin against colon cancer cells. And Real-time PCR and Fluorescence-activated cell sorting (FACS) were used to determine CD44 expression level in colon cancer cells after treated with curcumin. Then we used Magnetic-activated cell sorting ( MACS) method to separate CD44 positive and negative cells. And we compared the proliferation inhibition effects of curcumin against these two kinds of cells. Results: Curcumin could inhibit the proliferation of HCT116 and HT-29 colon cancer cell lines. The expression level of CD44 could also be down-regulated after the colon cancer cells were treated with curcumin. Conclusion: Curcumin could inhibit the proliferation of CD44+colon cancer cells. Thus it was suggested that crcumin might have the effect to inhibit the proliferation of colon cancer stem cells and might be used as a promising agents to prevent the relapse and metastasis of colon cancer.
RESUMO
<p><b>OBJECTIVE</b>To determine whether or not enterovirus 71 (enteroviurs 71, EV71) may induce autophagy and affect the production and release of EV71 after the treatment of autophagy inhibitor.</p><p><b>METHODS</b>Western blots were performed to examine the conversion of LC3-I to LC3- II and the degradation of P62 after the RD-A cells were infected with EV71. CCID50 was determined by checking the virus titer in the supernatant of cells that treated with autophagy inhibitor 3-MA.</p><p><b>RESULTS</b>EV71 infection enhances the type conversion of LC3 and degradation of P62. The infectious virus particles were decreased after the treatment of 3-MA.</p><p><b>CONCLUSION</b>EV71 infection could induce cell autophagy and the autophagy might contribute to the production and release of infectious EV71 particles.</p>