Rex1 (Zfp42) null mice show impaired testicular function, abnormal testis morphology, and aberrant gene expression.

Abstract:

:Rex1 (Zfp42), GeneID 132625, is a gene whose expression is closely associated with pluripotency/multipotency in both mouse and human embryonic stem cells. To study the function of the murine Rex1 gene in vivo, we have used cre/lox technology to create Rex1(floxed) mice and mice deficient in Rex1 gene function. Rex1(-/-)males are characterized by an age-associated decrease in sperm counts, abnormal sperm morphology, and mild testicular atrophy. We characterized global patterns of gene expression in primary germ cells by microarray and identified the growth hormone responsive gene, GRTP1, as a transcript present at a 4.5 fold higher level in wild type (WT) compared to Rex1(-/-) mice. We analyzed immature germ cell (Dazl), proliferating (PCNA), and Sertoli cell populations, and quantitated levels of apoptosis in Rex1(-/-) as compared to WT testes. We evaluated the expression of proteins previously reported to correlate with Rex1 expression, such as STAT3, phospho-STAT3, p38, and phospho-p38 in the testis. We report a distinct cellular localization of total STAT3 protein in Rex1(-/-) affected testes. Our data suggest that loss of Rex1 leads to impaired testicular function.

journal_name

Dev Biol

journal_title

Developmental biology

authors

Rezende NC,Lee MY,Monette S,Mark W,Lu A,Gudas LJ

doi

10.1016/j.ydbio.2011.05.664

subject

Has Abstract

pub_date

2011-08-15 00:00:00

pages

370-82

issue

2

eissn

0012-1606

issn

1095-564X

pii

S0012-1606(11)00979-1

journal_volume

356

pub_type

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