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Related Experiment Videos

Prolactin receptor expression in human testis and accessory tissues: localization and function.

W M Hair1, O Gubbay, H N Jabbour

  • 1MRC Human Reproductive Sciences Unit, Centre for Reproductive Biology, 37 Chalmers Street, Edinburgh EH3 9EW, UK.

Molecular Human Reproduction
|June 28, 2002
PubMed
Summary
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Prolactin receptors (PRL-R) are present in the human male reproductive tract, including the testis and vas deferens. Prolactin activates signaling pathways in the vas deferens, suggesting diverse roles in male reproduction.

Area of Science:

  • Reproductive Endocrinology
  • Molecular Biology

Background:

  • Prolactin (PRL) is recognized as a progonadal hormone in animal models, influencing testicular and accessory gland function.
  • The precise role and localization of prolactin receptors (PRL-R) in the human male reproductive system remain incompletely understood.

Purpose of the Study:

  • To investigate the expression and localization of prolactin receptors (PRL-R) in the human testis and accessory reproductive tissues.
  • To functionally characterize prolactin receptor activation in the human vas deferens.

Main Methods:

  • Reverse transcription-polymerase chain reaction (RT-PCR) to detect PRL-R gene expression in human testis and vas deferens.
  • Immunohistochemistry to localize PRL-R protein in testicular and accessory tissues.
  • Analysis of JAK/STAT and MAP kinase ERK signaling pathways in response to PRL stimulation in vas deferens samples.

Related Experiment Videos

Main Results:

  • PRL-R expression was confirmed in the human testis and vas deferens via RT-PCR.
  • Immunohistochemistry revealed PRL-R localization in Leydig cells and differentiating germ cells within the testis, as well as in the epithelium of the vas deferens, epididymis, prostate, and seminal vesicles.
  • Functional studies demonstrated PRL-induced activation of JAK/STAT and MAP kinase ERK signaling pathways in the vas deferens.

Conclusions:

  • The presence and localization of PRL-R in the human testis and accessory organs suggest direct roles for prolactin.
  • PRL-R signaling activation in the vas deferens indicates a functional role for prolactin in this tissue.
  • These findings support multiple functions for prolactin within the human male reproductive tract.