ABSTRACT
The effects of antisense oligonucleotides of c-fos and c-jun on the proliferation of CNE-2Z cells and on the expression of protein kinase C-? (PKC-?) were investigated. With the interpoising of Lipofectin(LP), the CNE-2Z cells were added with antisens oligonucleotides of c-fos and c-jun. MTT method was used to test the cell proliferation and flow cytometry (FCM) to the PKC-a expression. The results showed that the inhibition of antisense oligonucleotides of c-fos and c-jun to CEN-2Z cells was gradually enhanced with its concentration and prolonging time increasing and that its lowest effective concentration of LP was 1.7 X 10~(-6)?g/ml, the lowest effective concentration was of antisense oligonucleotides of c-fos and c-jun 1.7 x 10~(-5)?g/ml, and the most effective time was 20 hours after treatment. The fluoresence of PKC-a and percentage of positive cells in the groups treated by antisense oligonucleotides of c-fos and c-jun decreased significantly. The results indicated that the autisense oligonucleotides of c-fos and c-jun could inhibit the proliferation of CNE-2Z ceUs the expression of PKC-?.
ABSTRACT
AIM:To investigate the effect of Epstain-Barr virus latent membrane protein 1 (EBV-LMP1) on proliferation and cell cycle of nasopharyngeal carcinoma (NPC) cells. METHODS:The expression of EBV-LMP1 was detected by immunohistochemical method (LSAB). Proliferation of NPC cells was identified by MTT method. Cell cycle percentage was detected by flow cytometry analysis. RESULTS: OD value of EBV-LMP1 expressive NPC cells L-CEN1 was much higher than that of both EBV-LMP1 negative NPC cells V-CEN1 and CNE1 ( P 0.05).CONCLUSION:The expression of EBV-LMP1 on NPC cell might cause some change of cell cycle and enhance cell proliferation.
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AIM To study the effects of homoharringtonine(HHT) on inhibition of proliferation and induction of apoptosis of nasopharyngeal carcinoma cells CNE 2Z. METHODS The inhibitory rates of the proliferation and IC 50 were detected by MTT method. The apoptosis was analyzed by flow cytometry (FCM), agarose gel electrophoresis and Hoechst 33258/PI fluorescence staining. RESULTS After cells were treated with HHT of different concentrations for 24, 48 and 72 h,respectively,the inhibitory rates of the proliferation rised with concentration and time. The IC 50 values of 24, 48 and 72 h were (0 629?0 039), (0 483?0 011) and (0 389?0 027) mg?L -1 , respectively. The difference among IC 50 values was obvious ( P
ABSTRACT
Objective:To investigate the relations between the changes of apoptotic lymphocytes and expression of apoptotic protein and idiopathic thrombocytopenic purpura(ITP).Methods:Flow cytometry was used to detect the percentages of the apoptotic lymphocytes and the expression of Fas,FasL on peripheral lymphocytes,and the serum levels of sFas、sFasL were also determined by a sandwich enzyme-linked immunosorbent assay(ELISA),in 25 patients with ITP.Results:The percentages of the apoptotic lymphocytes(3.35?1.43) and the expression of Fas(32.17?6.54) and FasL(41.14?6.76)were all increased significantly in treated patients whose platelets recovered to normal( P