卫星双链RNA通过调节替代拼接来诱导胰腺癌中介酶过渡
Takuma Iwata1, Takahiro Kishikawa1, Takahiro Seimiya1
1Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
The Journal of biological chemistry
|February 12, 2024
概括
双链人类卫星II (dsHSATII) RNA通过诱导上皮层-介质细胞过渡 (EMT) 来促进胰腺癌的入侵. 精子周核RNA结合蛋白 (STRBP) 通过调节替代拼接来抵消这种效应.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 基因组学就是基因组学.
背景情况:
- 人类卫星II (HSATII) 是一种重复的DNA序列,存在于周心层区域.
- 异常的HSATII转录发生在上皮癌中,包括胰腺癌.
- 双链RNAs (dsRNAs) 在癌症进展中的作用,无论是促进瘤还是抑制,都在争论中.
研究的目的:
- 为了研究癌症中双链HSATII (dsHSATII) RNA的分子功能.
- 探索dSHSATII在上皮介质转换 (EMT) 和胰腺癌中细胞侵入性的作用.
主要方法:
- 在胰腺癌细胞中过度表达dshati.
- 与dHSATII相互作用的RNA结合蛋白的识别和表征.
- 评估细胞形态,侵入性和基因替代拼接.
- 操纵精子周核RNA结合蛋白 (STRBP) 的水平.
主要成果:
- 过度表达dSHSATII诱导了中细胞样形态和增加了胰腺癌细胞的侵入性.
- 精子周核RNA结合蛋白 (STRBP) 被确定为dSHSATII结合蛋白.
- STRBP过度表达挽救了dHSATII诱导的间酶体过渡.
- STRBP调节了包括CLSTN1在内的EMT相关基因的替代拼接,影响了类似EMT的变化.
结论:
- dsHSATIIRNA通过诱导类似EMT的变化和增强胰腺癌细胞侵入性来具有促进瘤的功能.
- 在DSHSATII介导的EMT途径中,STRBP充当关键调节器.
- 这些发现阐明了异常卫星阵列表达在恶性瘤中的意义.
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