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Updated: Jul 2, 2025

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Published on: August 12, 2011

主要细胞的低氧诱导的不朽化取决于Tfcp2L1表达

D Otero-Albiol^1,2, J M Santos-Pereira³, A Lucena-Cacace⁴

¹Instituto de Biomedicina de Sevilla, IBIS, Hospital Universitario Virgen del Rocío, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, Avda. Manuel Siurot s/n, 41013, Seville, Spain.

Cell death & disease

|February 28, 2024

概括

缺氧通过减少衰老标志物和增加Tfcp2l1,一个干度调节器,延长细胞寿命. 这一过程在癌症发生之前至关重要,涉及调节用于增殖和脱差的关键基因.

科学领域:

细胞和分子生物学细胞和分子生物学
癌症研究癌症研究
干细胞生物学干细胞生物学

背景情况:

细胞衰老是一种防止不受控制的增殖的保护机制.
已知低氧会延长细胞寿命并减少氧化损伤,但恶性瘤之前的潜在机制尚不清楚.

研究的目的:

为了研究缺氧如何促进延长细胞寿命,并绕过老化在恶性转变前小鼠胚胎纤维细胞 (MEFs).
为了确定关键的分子调节器,参与低氧诱导的细胞不朽化.

主要方法:

在低氧和正常氧条件下培养MEF.
对衰老标记物 (p16INK4a,p15INK4b,p21Cip1) 和干性基因 (Tfcp2l1,Oct3/4,Sox2,Nanog) 的分析.
染色体可访问性 (ATAC-seq) 和ChIP-sequencing (ChIP-seq) 以确定Tfcp2l1的监管目标.

主要成果:

缺氧通过降低衰老标志物的调节,显著增加了MEF的寿命.
在缺氧中增殖的MEF过度表达了Tfcp2l1,一个多能性调节器,以及Oct3/4,Sox2和Nanog.的茎基因.
在缺氧下由Hif1α调节的Tfcp2l1被证明可以控制参与增殖和干性 (Sox2, Sox9, Jarid2, Ezh2) 的基因,并促进细胞重编程.

结论:

低氧诱导的Tfcp2l1激活有助于在恶性转变之前的细胞不朽化.
Tfcp2l1通过调节关键的干性和增殖基因,在促进瘤发生和脱差方面发挥着关键作用.

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