Key result
High Cav-1 levels in developing mouse ovaries reveal a dense vascular network compared to testes.
Why the study?
Genes preferentially expressed in mouse fetal ovaries relative to testes were screened to identify female-specific candidates involved in ovarian development.
Points to sex-specific gonadal vascularization; leaves open caveolin-1 functional roles in reproductive development.
Expression screening for genes preferentially expressed in mouse fetal ovaries relative to testes identified Cav-1 as a candidate female-specific gene. Cav-1 encodes caveolin-1, a component of the cell membrane invaginations known as caveolae, which are involved in lipid regulation and signal transduction. In situ hybridization revealed high levels of Cav-1 mRNA in developing ovaries, compared with moderate or low levels in testes. Analysis of caveolin-1 protein distribution by immunofluorescence showed this difference to be due to the development of a dense and complex vascular network in the developing ovary. These observations point to a higher degree of differentiation and organization of the early stage mammalian ovary than previously suspected.
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Bullejos et al. (2002) studied this question. Cav-1 expression analysis vs. Testes was evaluated on Cav-1 mRNA and caveolin-1 protein distribution. High levels of Cav-1 mRNA and caveolin-1 protein in developing mouse ovaries compared to testes revealed a dense and complex vascular network in the early stage mammalian ovary.
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