ABSTRACT
Objective To investigate the serum cystatin C(Cys C)levles in different age and sex health physical examination people,and to analyze the correlation between different ages,different genders and Cys C levles. Methods 648 healthy subjects checked with physical examination were selected.611 patients with normal renal function were selected.The serum Cys C and Cr concentrations were determined and statistically analyzed according to different age or gender groups.The serum Cys C and Cr concentrations of other 37 patients with abnormal renal func-tion were detected and compared with normal renal function people in the same ages.Results There were no signifi-cant differences in serum CysC levels between men and women in different ages and normal renal function people(t =2.449,P =0.092;t =0.176,P =0.872;t =2.030,P =0.135;t =2.376,P =0.098;t =1.549,P =0.219;t =1.732,P =0.182;t =1.095,P =0.353;t =1.732,P =0.182;t =2.449,P =0.092;t =2.611;P =0.080).There were significant differences in serum Cys C level between men,women and combined with normal renal function(F =5.662,5.615,7.253,all P <0.05).Taken the linear correlation analysis by age with serum Cys C level among men, women and combined with normal renal function groups,the results showed that had positive correlation(r =0.525, 0.511,0.522,all P <0.05 ).Renal function of different genders in the health physical examination people over 50 years of age appeared serum Cys C positive persons,and the positive rate of each gender group increased alone with the increase of age(F =7.324,7.341,7.452,all P <0.05).The Cys C,Cr content and positive rate of renal function in health physical examination people were significantly lower than abnormal renal function people (t =31.080, 15.472;χ2 =17.043,34.105;all P <0.05).Conclusion There is an evident positive correlation in health physical examination people between serum Cys C level and the ages,and are increased alone with increase of age,which is increasing evidently alone with increase of age,while has no correlation with gender.
ABSTRACT
Objective To study inhibitory effects of transcription factor activator protein-2α(AP-2α)on proliferation of colon cancer cells in vitro and its mechanism. Methods The peDNA3.1 (+)-AP-2α recombinant plasmid was constructed. Plasmid pcDNA3.1(+)- AP-2α and pcDNA3.1(+)was transfected into SW620 cell by liposome mediation for transient expression, and proliferative activities of SW620 cell were evaluated by MTT assay. The change in the mRNA and protein expression level of ER-β before and after transfection was detected using the methods of Real-Time PCR and Western blotting respectively. Results The mRNA and protein expressions of AP-2α could be enhanced by transfecting of AP-2α gene in SW620 cell. MTT assay indicated: the proliferation velocity of SW620 cell for transfection of the pcDNA3.1(+)-AP-2α plasmid was apparently inhibited. The expression of ER-β in SW620 cell increased significantly after AP-2α gene transfection. Compared with control group, the difference was significant (P＜0.05). Conclusion Overexpression of AP-2α inhibits the proliferation of SW620 cell in vitro, which is probably related with activation of ER-β.
ABSTRACT
Objective To inhibit the expression of transcription factor special protein 1(Sp1) through RNA interference (RNAi) technique and to investigate its impact on the proliferation ability of colorectal cancer cell line SW620. Methods The recombinant plasmid of Sp1 RNAi (pGenesil-1-Sp1) was constructed and transfected into SW620 cells by Lipofectamine. The transfcction efficiency was observed under fluorescence confocal microscopy. Expression levels of Sp1 mRNA and protein from SW620 after transfection were examined by real time PCR and Western blot respectively, after transduction of the recombinant plasmid into the SW620. The proliferation ability of SW620 cell line was evaluated by MTT assay. Results The expression plasmid (pGenesil-1-Sp1) against Sp1 was successfully constructed, recombinant vectors could reduce the expressions of Sp1 mRNA and protein in SW620, the ratio of inhibition of the expression of Sp1 mRNA and protein was 68.47 % and 73.82 % in 48th hour respectively. Compared with the control group, the difference was significant (P <0.05). MTT showed that the proliferation ability of SW620 cell was degraded. Conclusion Silencing Sp1 gene by the RNAi technology can actively inhibit the proliferation of SW620 cell. The successful application of Spl SiRNA extends the list of available therapeutic modalitics in the treatment of human colon cancer.