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Sexually dimorphic expression of Gata-2 during mouse gonad development
Pam Siggers1, Lee Smith, Andy Greenfield
1MRC Mammalian Genetics Unit, Harwell, OX11 0RD, Didcot, UK.
Mechanisms of Development
|January 24, 2002
Summary
Gata-2 gene expression shows sexual dimorphism during mouse gonad development. Ovarian Gata-2 is germ cell-dependent, unlike in the fetal testis.
Area of Science:
- Developmental biology
- Genetics
- Reproductive biology
Background:
- Gata-2 is a transcription factor crucial for various developmental processes.
- Sexual dimorphism in gene expression is fundamental to gonad development.
Purpose of the Study:
- To investigate the expression pattern of Gata-2 during mouse gonadogenesis.
- To determine the role of germ cells in ovarian Gata-2 expression.
Main Methods:
- Real-time quantitative PCR for Gata-2 transcript detection.
- In situ hybridization using Oct4 as a germ cell marker.
- Analysis of Gata-2 expression in c-kit mutant mouse embryos.
Main Results:
- Gata-2 transcripts were detected in the fetal ovary from 11.5 days post coitum (dpc) but not in the fetal testis (10.5-15.5 dpc).
- Ovarian Gata-2 expression ceased by 15.5 dpc.
- Gata-2 expression in the ovary was dependent on the presence of germ cells, as shown in c-kit mutant embryos.
- Gata-2 transcripts were localized to the germ cell lineage at 13.5 dpc.
Conclusions:
- Gata-2 exhibits sexually dimorphic expression during mouse gonadogenesis.
- Ovarian Gata-2 expression is regulated by germ cell presence.
- Gata-2 is a key gene in the germ cell lineage during ovarian development.