Spermiogenesis deficiency and germ-cell apoptosis in CREM-mutant mice.

Abstract:

:Spermiogenesis is a complex process by which postmeiotic male germ cells differentiate into mature spermatozoa. This process involves remarkable structural and biochemical changes including nuclear DNA compaction and acrosome formation. Transcription activator CREM (cyclic AMP-responsive element modulator) is highly expressed in postmeiotic cells, and CREM may be responsible for the activation of several haploid germ cell-specific genes involved in the structuring of the spermatozoon. The specific role of CREM in spermiogenesis was addressed using CREM-mutant mice generated by homologous recombination. Analysis of the seminiferous epithelium in mutant male mice reveals postmeiotic arrest at the first step of spermiogenesis. Late spermatids are completely absent, and there is a significant increase in apoptotic germ cells. We show that CREM deficiency results in the lack of postmeiotic cell-specific gene expression. The complete lack of spermatozoa in the mutant mice is reminiscent of cases of human infertility.

journal_name

Nature

journal_title

Nature

authors

Nantel F,Monaco L,Foulkes NS,Masquilier D,LeMeur M,Henriksén K,Dierich A,Parvinen M,Sassone-Corsi P

doi

10.1038/380159a0

subject

Has Abstract

pub_date

1996-03-14 00:00:00

pages

159-62

issue

6570

eissn

0028-0836

issn

1476-4687

journal_volume

380

pub_type

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