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Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
初级子宫癌中的克隆性p53突变:与人乳头瘤病毒阴性瘤相关
1Ludwig Institute for Cancer Research, St Mary's Hospital Medical School, London, UK.
Lancet (London, England)
|May 2, 1992
概括
人类乳头瘤病毒 (HPV) 感染与子宫癌中的p53基因突变相反相关. 阳性HPV瘤主要显示野生型p53,这表明瘤抑制基因失活的机制不同.
科学领域:
- 在瘤学瘤学.
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 人类乳头瘤病毒 (HPV) 和p53瘤抑制基因突变之间的反相关性已在门癌和细胞系中观察到.
- 宫癌与HPV感染密切相关,而p53基因是癌症中经常改变的关键瘤抑制剂.
研究的目的:
- 为了研究HPV感染和p53基因的体质突变在初级宫瘤之间的关联.
- 了解p53基因变异在宫癌的发病过程中的作用,与HPV状况相关.
主要方法:
- 使用南方斑块和聚合酶链反应 (PCR) 对28个初级宫瘤样本进行HPVDNA存在的分析.
- 检测HPV类型16和18的检测.
- 通过使用不对称PCR对整个编码区域进行测序来评估p53基因突变.
- 使用限制片段长度多态化 (RFLP) 对第17号染色体短臂的基删除的分析.
主要成果:
- 在28个 (89%) 的宫瘤中,在25个中检测到HPV序列,其中20个为HPV16阳性,5个为HPV18.
- 在17种分析的瘤中,没有发现染色体17短臂的基删除的证据.
- 只有3种HPV阴性瘤在p53基因中表现出异构点突变.
- 相比之下,21种HPV阳性宫癌在整个分析区域显示野生类型的p53序列.
结论:
- 野生型p53功能的丧失在宫癌病理学中至关重要.
- 在HPV阳性宫癌中,HPV编码的蛋白质可能会调解p53功能的丧失,从而避免需要p53体质突变.
- 在没有HPV介导机制的情况下,需要p53基因的体质突变才能使p53失活.
- 在HPV阳性与HPV阴性宫癌中,p53突变的独特模式可能导致患者预后的差异.
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