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在C. elegans中通过构成性假基因表达延长体细胞增殖

Svenia D Heinze^1,2, Simon Berger^1,3, Stefanie Engleitner^1,2

¹Department of Molecular Life Sciences, University Zürich, Winterthurerstrasse 190, 8057, Zürich, Switzerland.

Nature communications

|October 27, 2023

概括

霍克斯基因控制了C. elegans的细胞增殖时间. 构成性霍克斯基因表达可以延长体细胞分裂,这表明它们的下调限制了成人再生.

科学领域:

发展生物学发展生物学
遗传学遗传学是一个
细胞生物学细胞生物学

背景情况:

霍克斯基因对体段身份和发育过程中的干细胞功能至关重要.
与较高的生物不同,C. elegans体细胞在血统完成后永久退出细胞周期,防止成人再生.

研究的目的:

研究霍克斯基因表达水平在调节C. elegans体细胞增殖时间中的作用.
为了确定霍克斯基因表达是否可以在成年体细胞中覆盖正常细胞循环停止.

主要方法:

在特定的C. elegans细胞类型 (细胞,细胞) 中操纵中央霍克斯基因lin-39的表达.
观察改变lin-39表达对细胞周期进展和增殖的影响.
在静止细胞中分析异胎性霍克斯基因表达对静止细胞的影响.

主要成果:

在分裂的细胞中,lin-39的下调导致细胞周期过早退出.
构成性lin-39表达诱导了早期细胞分裂,并延长了细胞的增殖期.
静止细胞中的异胎性霍克斯基因表达重新激活了细胞循环,并促进了成年期的增殖.

结论:

霍克斯基因表达水平决定了体细胞在C. elegans中繁殖的时间能力.
一个单一的霍克斯转录因子的持续表达可以将体细胞的增殖扩展到超出正常的血统限制.
在幼虫发育结束时减少的霍克斯基因表达可能导致C. elegans. 没有成年体细胞的增殖.

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