Increased sex chromosome expression and epigenetic abnormalities in spermatids from male mice with Y chromosome deletions.

ABSTRACT: During male meiosis, the X and Y chromosomes are transcriptionally silenced, a process termed meiotic sex chromosome inactivation (MSCI). Recent studies have shown that the sex chromosomes remain substantially transcriptionally repressed after meiosis in round spermatids, but the mechanisms involved in this later repression are poorly understood. Mice with deletions of the Y chromosome long arm (MSYq-) have increased spermatid expression of multicopy X and Y genes, and so represent a model for studying post-meiotic sex chromosome repression. Here, we show that the increase in sex chromosome transcription in spermatids from MSYq- mice affects not only multicopy but also single-copy XY genes, as well as an X-linked reporter gene. This increase in transcription is accompanied by specific chan

SUBMITTER: Reynard LN 

PROVIDER: S-EPMC2776507 | biostudies-literature | 2009 Nov

REPOSITORIES: biostudies-literature