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OBJECTIVE To analyze the effect of advanced glycation end products(AGEs) on apoptosis of cultured mouse spiral ganglion cells(SGCs) and expression of receptor of AGEs(RAGE). To explore the pathway of AGEs in promoting apoptosis of SGCs. And to explore the possible mechanism of neural presbycusis. METHODS The effect of AGEs on apoptosis of SGCs was studied by Tunel technique and fluorescence microscope. The expression of RAGE mRNA was assayed by Real time RT-PCR. RESULTS AGEs induced apoptosis of cultured SGCs. The effects were dose-dependent and time-dependent. Meanwhile RAGE mRNA expression was enhanced in apoptosis cells. CONCLUSION AGEs induced apoptosis in SGCs,which may be mediated by RAGE. And this may be one of the mechanisms of neural presbycusis.
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0.05);the frequencies of IFN-? gene +874 site T and A allele showed significant difference between case group and control group(P0.05).Conclusion T allele of IFN? gene+874 site might have a relationship with generation of ovarian cancer,TT genotype might be susceptibility genotype for ovarian cancer.
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AIM: To study the molecular mechanism of reproduction dysfunction in pubertal diabetic rat, the level of 5?-reductase (type 2) mRNA in testis, epididymis and prostate in diabetic rat was detected. METHODS: The gene expression of 5?-reductase (type 2) was detected by Northern blot. RESULTS: In the caput of the epididymis, the expression of 5?-reductase (type 2) mRNA of D and ID groups was less than that of C group. CONCLUSION: The decreased expression of 5?-reductase (type 2) results in the decreased production of dihydrotestosterone, which influences the development and function of reproduction system in pubertal rats. [