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Prolactin effect on pre-pubertal Sertoli cell proliferation and metabolism
L Scarabelli1, D Caviglia, C Bottazzi
1Department of Experimental, Environmental and Applied Biology, Section of General and Compared Physiology, University of Genova, Genova, Italy. lindas@unige.it
Journal of Endocrinological Investigation
|December 13, 2003
Summary
Prolactin (PRL) significantly boosts Sertoli cell proliferation and metabolism in prepubertal testes. These findings highlight Sertoli cells as key targets for PRL action during early testicular development.
Area of Science:
- Reproductive Biology
- Endocrinology
- Cell Biology
Background:
- Sertoli cells are crucial for testicular development and function.
- The role of prolactin (PRL) in prepubertal testicular development requires further elucidation.
Purpose of the Study:
- To investigate the direct effects of PRL on Sertoli cell proliferation.
- To analyze the metabolic effects of PRL on Sertoli cells in prepubertal testes.
Main Methods:
- Primary Sertoli cell cultures were established from prepubertal rat and porcine testes.
- Proliferation was assessed by [3H] thymidine incorporation.
- Metabolic activity was measured by lactate secretion and [14C] valine incorporation for protein synthesis.
Main Results:
- Physiological doses of PRL significantly increased basal DNA synthesis by 50-60%.
- PRL elevated lactate secretion by approximately 50% and androgen-binding protein (ABP) production by 30%.
- Basal protein synthesis increased by 25-30% following PRL exposure.
Conclusions:
- Sertoli cells are a potential target for prolactin action.
- PRL significantly influences Sertoli cell proliferation and metabolism during prepubertal development.
- These findings contribute to understanding the endocrine regulation of testicular maturation.