在介质性停止期间,p63保护女性生殖线
Eun-Kyung Suh1, Annie Yang, Arminja Kettenbach
1Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA.
Nature
|November 24, 2006
概括
瘤抑制剂p63,而不是p53,对于检测被捕的雌性生殖细胞中的DNA损伤至关重要,触发卵细胞死亡以保持生殖线完整性和生育能力.
科学领域:
- 生殖生物学 生殖生物学
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 哺乳动物雌性半转化涉及长期的预相I停止,在此期间检测DNA损伤是关键的,但不太了解.
- 瘤抑制剂p53与基因组监测有关,但其在女性生殖系完整性中的作用仍在争论中.
研究的目的:
- 调查p53家族成员在女性中介性停止期间DNA损伤反应中的作用.
- 为了阐明DNA损伤引起的卵细胞死亡的机制,在女性生殖线.
主要方法:
- 在女性生殖细胞中对p63及其TAp63异型的构成性表达分析.
- 在DNA损伤诱导后对p63酸化和DNA结合的研究.
- 评估p63在DNA损伤引起的卵细胞死亡中的作用,有或没有p53.
主要成果:
- TAp63在被阻止的卵细胞中构成性表达,对于DNA损伤引起的卵细胞死亡至关重要,独立于p53.
- DNA损伤触发了p63酸化和与p53-响应性DNA元素的结合,与卵细胞死亡相关.
- p63似乎是参与女性生殖系监测的祖先p53家族成员.
结论:
- p63,而不是p53,在介质停留期间监测雌性生殖线完整性方面发挥着主要作用.
- 这些发现表明,女性生殖系监测的保存机制早于p53在脊椎动物体质瘤抑制中的作用.
- 这项研究对理解生育调节,生殖系忠诚度和瘤抑制途径的演变有影响.
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