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Cell type-specific expression of the Mas proto-oncogene in testis
Natalia Alenina1, Tatjana Baranova, Eugene Smirnow
1Department of Cardiology, University Hospital Benjamin Franklin, Berlin-Buch, Germany.
Summary
The Mas proto-oncogene, a G-protein-coupled receptor, is newly expressed in mouse testes during development. Its specific expression in Leydig and Sertoli cells suggests a role in testicular maturation.
Area of Science:
- Endocrinology
- Molecular Biology
- Reproductive Biology
Background:
- The Mas proto-oncogene encodes a G-protein-coupled receptor.
- Mas is highly expressed in the testis, suggesting a potential role in reproductive function.
- Its involvement in angiotensin actions is also noted.
Purpose of the Study:
- To investigate the cell type-specificity of Mas expression in the testis.
- To determine the onset of Mas gene expression during testicular development.
Main Methods:
- RNase protection assay to detect Mas mRNA.
- In situ hybridization to localize Mas expression within testicular cells.
- Study conducted on mice at various developmental stages (12 days to 6 months).
Main Results:
- Mas mRNA was not detected in 12-day-old mouse testes or cultured Sertoli and Leydig cells.
- Mas expression was first observed in 18-day-old mice, increasing with age.
- In situ hybridization localized Mas expression to Leydig cells (strongest), Sertoli cells, and weakly to primary spermatocytes.
Conclusions:
- Mas expression in the testis is developmentally regulated and cell type-specific.
- The strong expression in Leydig and Sertoli cells suggests a significant role for Mas in testis maturation.
- The Mas proto-oncogene is implicated in the functional development of the testis.