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Mesenchymal-epithelial interactions and transforming growth factor-beta expression during mouse prostate
T L Timme1, L D Truong, V W Merz
1Scott Department of Urology, Baylor College of Medicine, Houston, Texas 77030.
Endocrinology
|March 1, 1994
Summary
Transforming growth factor-beta 1 (TGF beta 1) and growth genes are key in mouse prostate development. These factors, particularly TGF beta 1, are concentrated in mesenchymal cells during active duct formation, highlighting their role in tissue remodeling.
Area of Science:
- Developmental Biology
- Molecular Biology
- Urology
Background:
- Prostate morphogenesis involves complex interactions between epithelial and mesenchymal tissues.
- Transforming growth factor-beta (TGF beta) signaling pathways are implicated in tissue development and remodeling.
Purpose of the Study:
- To investigate the expression patterns of TGF beta isoforms and other growth-related genes during mouse prostate development.
- To elucidate the role of these genes in mesenchymal-epithelial interactions during prostate morphogenesis.
Main Methods:
- Quantitative analysis of mRNA levels for TGF beta 1, -beta 2, -beta 3, tissue plasminogen activator, urokinase plasminogen activator, androgen receptor, and c-myc in fetal and adult mouse prostate tissues.
- Immunohistochemical localization of TGF beta 1 protein using specific antiserum.
Main Results:
- TGF beta 1, -beta 2, and -beta 3 mRNA levels were higher in fetal urogenital sinus mesenchyme (UGM) than epithelium (UGE).
- Only TGF beta 1 mRNA was sustained in adult prostate tissues, with high protein accumulation in the mesenchymal compartment, especially during active duct formation.
- Other growth-related genes (urokinase plasminogen activator, androgen receptor, c-myc) were also elevated in UGM and showed lobe-specific expression in adult prostates.
Conclusions:
- TGF beta 1 and other growth-related genes are predominantly expressed by mesenchymal cells during active prostate morphogenesis.
- These findings highlight the critical role of mesenchymal-derived factors in mediating epithelial development and prostate tissue remodeling.