人类疹病毒KSHV编码了一个与细胞增殖相关的构成性活性G蛋白结合受体
L Arvanitakis1, E Geras-Raaka, A Varma
1Department of Pathology, Cornell University Medical College, New York 10021, USA.
Nature
|January 23, 1997
概括
卡波西的肉瘤相关性疹病毒 (KSHV) 编码G蛋白合受体,该受体独立发出信号并促进细胞生长. 这一发现确定了一个潜在的病毒瘤基因,有助于KSHV相关的恶性瘤.
科学领域:
- 病毒学 病毒学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 卡波西肉瘤相关性疹病毒 (KSHV) 或人类疹病毒8 (HHV8) 与卡波西肉瘤和淋巴瘤有关,特别是在艾滋病患者中.
- KSHV属于玛疹病毒家族,与疹病毒赛米里和爱斯坦-巴尔病毒等淋巴细胞病毒有相似之处.
研究的目的:
- 研究KSHV.编码的新发现的G蛋白结合受体 (GPCR) 的功能.
- 确定KSHV GPCR是否起到信号受体的作用,并有助于病毒瘤发生.
主要方法:
- 克隆KSHV基因组片段以确定假定GPCR的开放读取框架.
- 对KSHV GPCR在酸-酸-酸-蛋白激酶C通路中的信号活动的分析.
- 评估KSHV GPCR对细胞增殖的影响.
主要成果:
- 证实KSHV编码的GPCR是一种功能信号受体.
- 这种病毒受体表现出构成性 (抗激素独立) 活性.
- 已经证明KSHV GPCR可以刺激细胞增殖.
结论:
- KSHV GPCR是一种具有构成性活性的真实信号受体.
- 该受体刺激细胞增殖的能力表明其作为病毒瘤基因的作用.
- 这一发现为KSHV诱导的恶性瘤的机制提供了洞察力.
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