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卵巢癌ras及p16基因异常表达的临床研究 被引量:1

Clinical Study of ras and Abnormal p16 Expression in Ovarian Carcinoma
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摘要 目的:探讨ras癌基因及p16抑癌基因与卵巢癌生物学行为的关系。方法:应用S-P免疫组化法及聚合酶链反应-单链构象多态性(PCR-SSCP)技术,检测36例卵巢癌,20例卵巢良性肿瘤及10例正常卵巢ras、p16基因及表达状况。结果:卵巢癌及对照组ras癌基因无突变及缺失。卵巢癌ras p21阳性表达80.6%,卵巢良性肿瘤仅有25%弱阳性表达,正常卵巢阴性表达,P< 0.01、P< 0.001,差异非常显著;卵巢癌及对照组p16基因无突变,卵巢癌p16缺失9例占25%,p16蛋白阳性表达降低,仅13.9%,强阳性表达27.8%,11例晚期卵巢癌阴性表达占30.6%;卵巢良性肿瘤p16蛋白弱阳性表达占45%,阳性表达降低占40%,对照组p16蛋白80%阳性表达,卵巢癌、卵巢良性肿瘤与正常对照比较阳性表达,P< 0.001、P< 0.05,差异显著。结论:本组卵巢上皮癌ras癌基因无突变,但ras p21过表达、p16基因25%缺失,无突变,p16蛋白表达降低,ras癌基因及p16抑癌基因异常,与卵巢癌患者临床分期、病理分化密切相关。 Objective To study the relationship between the biological behavior of ovarian carcinoma and the ras oncogene as well as p16 antioncogene. Methods The ras and p16 gene as well as their expressions were investigated in 36 specimens of ovarian carcinoma 20 benign ovarian tumor and 10 normal ovarian tissues by S-P immunohistochemistry and polymerase chain reaction single-stranded conformation polymorphism PCR-SSCP. Results No mutastion was detected in both the ovarian carcinoma specimens and the control group. Expression of ras p21 was positive in 80.6% of ovarian carcinoma weakly positive in 25% of benign ovarian tumor specimens and negative in normal ovaries P<0.01 and P< 0.001 with extremely significant differences. No mutation of p16 gene was found in ovarian carcinoma specimens and deletion of p16 was detected in 9 of 36 specimens of ovarian carcinoma and expression tests showed a decline of p16 expression in ovarian carcinoma specimens 13.9% positve 27.7% strongly positive. p16 expression was tested negative in 11 specimens 30.6% of ovarian carcinoma weakly positive in 45% and positive in 40% of benign ovarian tumors and it was positive in 80% of the control group. In contrast with the control group expression of p16 was significantly lower in the specimens of ovarian carcinoma or benign ovarian tumors P< 0.05P< 0.001. Conclusion In specimens of ovarian carcinoma from Yunnan province there was no ras genetic mutation but overexpression of ras p21 detected no other form of mutation but deletion of p16 gene was detected in 25% of specimens and its protein expression level was much lower than normal. The abnormal expressions of ras oncogene and p16 anti-oncogene were significantly associated with the clinical stage and the pathological grade of ovarian carcinoma.
出处 《中国肿瘤临床》 CAS CSCD 北大核心 2000年第10期744-747,共4页 Chinese Journal of Clinical Oncology
基金 云南省基础研究基金
关键词 卵巢癌 RAS基因 P16基因 基因异常表达 Ovarian carcinoma ras ras p21 p16 p16 protein
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