Premeiotic germ cell defect in seminiferous tubules of Atm-null testis

Keiyo Takubo, Atsushi Hirao, Masako Ohmura, Masaki Azuma, Fumio Arai, Go Nagamatsu, Toshio Suda

研究成果: Article査読

18 被引用数 (Scopus)

抄録

Lifelong spermatogenesis is maintained by coordinated sequential processes including self-renewal of stem cells, proliferation of spermatogonial cells, meiotic division, and spermiogenesis. It has been shown that ataxia telangiectasia-mutated (ATM) is required for meiotic division of the seminiferous tubules. Here, we show that, in addition to its role in meiosis, ATM has a pivotal role in premeiotic germ cell maintenance. ATM is activated in premeiotic spermatogonial cells and the Atm-null testis shows progressive degeneration. In Atm-null testicular cells, differing from bone marrow cells of Atm-null mice, reactive oxygen species-mediated p16Ink4a activation does not occur in Atm-null premeiotic germ cells, which suggests the involvement of different signaling pathways from bone marrow defects. Although Atm-null bone marrow undergoes p16Ink4a-mediated cellular senescence program, Atm-null premeiotic germ cells exhibited cell cycle arrest and apoptotic elimination of premeiotic germ cells, which is different from p16Ink4a-mediated senescence.

本文言語English
ページ(範囲)993-998
ページ数6
ジャーナルBiochemical and Biophysical Research Communications
351
4
DOI
出版ステータスPublished - 2006 12月 29
外部発表はい

ASJC Scopus subject areas

  • 生物理学
  • 生化学
  • 分子生物学
  • 細胞生物学

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