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Effect of raised serum prolactin on breast development
B M Stringer1, J Rowson, E D Williams
1Department of Pathology, University of Wales College of Medicine, Heath Park, Cardiff, U.K.
Journal of Anatomy
|February 1, 1989
Summary
Elevated serum prolactin, induced by perphenazine, significantly increased rat breast volume by over 8-fold within 14 days. All breast tissue components showed substantial growth in response to sustained prolactin levels.
Area of Science:
- Endocrinology
- Developmental Biology
- Mammalian Physiology
Background:
- Prolactin is a key hormone regulating mammary gland development and function.
- Understanding prolactin's specific effects on breast tissue components is crucial for reproductive biology research.
Purpose of the Study:
- To investigate the impact of sustained serum prolactin elevation on rat breast growth and development.
- To quantify volumetric changes in different breast tissue compartments in response to hyperprolactinemia.
Main Methods:
- Rats were administered perphenazine, a dopamine antagonist, to induce chronic hyperprolactinemia.
- Serum prolactin levels were monitored throughout the 54-day study.
- Total breast volume and volumetric changes in epithelial, myoepithelial, lumen, and stromal compartments of ductular and alveolar tissues were quantified.
Main Results:
- Perphenazine treatment caused a 5-10 fold increase in serum prolactin, sustained for 54 days.
- Total breast volume increased significantly, peaking at 8.9-fold by Day 14.
- All breast tissue components (epithelial, myoepithelial, lumen, stromal) demonstrated significant volume increases, with alveolar tissues showing 7-15 fold growth.
Conclusions:
- Sustained elevation of serum prolactin profoundly stimulates rat mammary gland growth.
- Both ductal and alveolar compartments respond robustly to hyperprolactinemia, affecting all tissue components.
- This study provides quantitative data on the dose-dependent effects of prolactin on mammary gland development.