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Long-term administration of prolactin or testosterone induced similar precancerous prostate lesions in rats
D Herrera-Covarrubias1, G A Coria-Avila1, P Chavarría-Xicoténcatl2
1Center for Brain Research, University of Veracruz, Xalapa, Ver. 91190, Mexico.
Unlabelled:
Evidence indicates that prolactin plays a crucial role in the normal function and development of the prostate, but abnormal high levels of the hormone are associated with hyperplasia and cancer of the gland.
Aims:
The present study was designed to describe the progressive specific histological abnormalities in the prostate of rats with chronic hyperprolactinemia.
Material And Methods:
Prolactin was administered during 4; 12 or 24 weeks, and the resulting prostatic alterations were compared with control rats, and also with those treated with testosterone, or the combination of prolactin + testosterone.
Results:
Rats treated with prolactin, testosterone or prolactin + testosterone expressed precancerous histological abnormalities in the dorsolateral and ventral portions of the prostate as early as in 4 weeks of treatment, but in all cases the malignancy increased after 12 or 24 weeks of treatment.
Conclusion:
Our study confirms that chronic hyperprolactinemia is a cause of prostate precancerous pathologies.
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