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Immunocytochemical detection of prolactin or prolactin-like immunoreactivity in epididymis of mature male mouse

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Summary

Prolactin (PRL) binds to the testis of mice and rats where it increases the number of luteinizing hormone receptors, increases the binding of human chorionic gonadotropin (hCG) to LH receptors, and enhances testosterone synthesis and secretion. PRL also binds to the prostate and seminal vesicles of rats and humans where it increases organ weight and stimulates growth and uptake of testosterone. PRL binds to the epididymis of rats but the effect of PRL on this organ is unknown. In the present study, a standard immunoperoxidase (PAP) technique was used to detect the binding of endogenous and exogenous PRL or PRL-like peptides to the epididymis of the mature mouse. Throughout the epididymal duct, a positive reaction for peroxidase, suggesting PRL or PRL-like binding, occurred in the Golgi area of principal cells. In segment 1, positive reactions were also visualized in the perinuclear area and in the region located between the Golgi area and the apical surface of the principal cells (supra-Golgi area). In the corpus and cauda epididymidis, scattered entire principal cells were also positive. Throughout the epididymal duct, the reactions indicating the binding of exogenous PRL were slightly stronger than those testing for binding of endogenous peptides. The significance of such binding to the epididymis is uncertain but PRL may perform the same functions in epididymal principal cells as it does in the testis, prostate, and seminal vesicles.

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  1. Biology Department, Auburn University at Montgomery, 36193, Montgomery, AL, USA

    W. B. Brumlow & C. S. Adams

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  1. W. B. Brumlow
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  2. C. S. Adams
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Brumlow, W.B., Adams, C.S. Immunocytochemical detection of prolactin or prolactin-like immunoreactivity in epididymis of mature male mouse. Histochemistry 93, 299–304 (1990). https://doi.org/10.1007/BF00266392

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  • DOI: https://doi.org/10.1007/BF00266392

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