在体内KSHV主要内部重复体内的变化
Jan Clement Santiago1, Dylan H Westfall1, Scott V Adams2
1Department of Microbiology, University of Washington, 960 Republican St, Seattle, WA 98109-4325, USA.
Virus evolution
|June 16, 2023
概括
卡波西卡波西 (Kaposi Kaposi) 是一个
科学领域:
- 病毒学 病毒学
- 基因组学就是基因组学.
- 在瘤学瘤学.
背景情况:
- 卡波西肉瘤相关的疹病毒 (KSHV) 导致卡波西肉瘤 (KS).
- 关键的KSHV基因组区域 (IR1,IR2,LANAr) 对于感染至关重要,但由于重复的序列,人们对它们的理解不佳.
- 以前的研究表明,这些重复区域的多样性很高,与KSHV基因组的其他部分形成鲜明对比.
研究的目的:
- 分析KSHV主要内部重复区域 (IR1,IR2,LANAr) 的遗传多样性.
- 为了评估这些重要的KSHV基因组段内的序列变异和重复长度异质性.
- 在IR2区域内调查卡波辛编码序列的完整性.
主要方法:
- 使用太平洋生物科学公司的单分子实时测序与独特分子标识符 (SMRT-UMI) 来获得全长的IR1,IR2和LANAr序列.
- 样本包括乌干达16名患有晚期KS的成年人的瘤和口腔抹布.
- 分析的重点是宿主内部单核酸变异,并联重复单元 (TRU) 计数,以及对等性.
主要成果:
- KSHV主要的内部重复表现出低的宿主内部多样性,类似于基因组的其余部分.
- 在重复区域中,IR1显示出最大的变化,其中12/16个个体有不匹配或可变的TRU计数.
- 在大多数 (55/96) 的采样序列中,IR2中没有发现完整的卡波辛读取框架.
结论:
- 与之前的建议相反,KSHV的主要内部重复区域在KS患者中表现出低基因多样性.
- IR1是最可变的重复区域,而IR2经常缺乏完整的卡波辛编码序列.
- 这些发现有助于理解KSHV基因组进化及其在卡波西肉瘤病变发生过程中的作用.
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