Reproliferation and relocation of mouse male germ cells (gonocytes) during prespermatogenesis

Reiko Nagano, Shoji Tabata, Yoshihiko Nakanishi, Seiichiroh Ohsako, Masamichi Kurohmaru, Yoshihiro Hayashi

研究成果: Contribution to journalArticle査読

101 被引用数 (Scopus)


In the prespermatogenesis period, male germ cells (gonocytes) begin to reproliferate and move to the basement membrane of the seminiferous tubule. Although these two events - reproliferation and relocation - are important for establishment of spermatogenesis, they have not been greatly analyzed both in a mechanical and in an endocrine or paracrine aspect. In this study, the relationship between reproliferation and relocation of gonocytes was examined, using the thymidine analog bromodeoxyuridine (BrdU) labeling method and transmission electron microscopy (TEM). BrdU was injected into the fetuses [day 13.5 post coitus (dpc) to 18.5 dpc] and pups [day 0.5 post partum (dpp) to 6.5 dpp] of C57BL/6J mice. Two hours later, BrdU positive gonocytes were examined immunohistochemically and these data were analyzed. TEM and LM observation was carried out as well. Gonocytes began to relocate on the basement membrane from 18.5 dpc (1.4%) while BrdU-labeled gonocytes were first detected on 1.5 dpp (13.6%). Relocated BrdU-negative gonocytes were recognized from 18.5 dpc (1.4%), and relocated BrdU-labeled gonocytes were recognized from 1.5 dpp (8.4%). On the other hand, non-relocated BrdU- labeled gonocytes were detected from 1.5 dpp (5.2%). Gonocyte relocation began 2 days earlier than reproliferation during the late fetal period. After birth, the two events occured at random. These results indicate that the reproliferation of the gonocyte does not correlate with relocation. The two events may be regulated by different mechanisms. (C) 2000 Wiley-Liss, Inc.

ジャーナルAnatomical Record
出版ステータス出版済み - 2 1 2000

All Science Journal Classification (ASJC) codes

  • 解剖学
  • 農業および生物科学(その他)


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