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Related Experiment Videos

Prolactin receptor gene expression in lymphoid cells.

K D O'Neal1, L A Schwarz, L Y Yu-Lee

  • 1Department of Medicine, Baylor College of Medicine, Houston, TX 77030.

Molecular and Cellular Endocrinology
|December 1, 1991
PubMed
Summary

Pituitary prolactin (PRL) rapidly increases its receptor (PRL-R) mRNA in T cells, suggesting PRL

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Area of Science:

  • Immunology
  • Molecular Biology
  • Endocrinology

Background:

  • Pituitary prolactin (PRL) is a hormone known to influence various physiological processes.
  • The role of PRL and its receptor (PRL-R) in lymphoid cell development and function remains an area of active investigation.
  • Understanding PRL-R expression is crucial for elucidating PRL's immunomodulatory functions.

Purpose of the Study:

  • To investigate the expression of the prolactin receptor (PRL-R) gene in lymphoid tissues.
  • To analyze the regulation of PRL-R gene expression in response to prolactin (PRL) stimulation.
  • To determine the role of PRL and its receptor in the growth and differentiation of lymphoid cells.

Main Methods:

  • Quantitative analysis of PRL-R gene expression using reverse transcription coupled to polymerase chain reaction (RT-PCR).
  • Treatment of rat T lymphoma Nb2 cells with PRL to observe changes in PRL-R mRNA levels.
  • Assessment of PRL-R expression in normal mouse thymocytes and splenocytes, as well as in established lymphoid cell lines.

Main Results:

  • PRL stimulation induced a rapid, transient increase in PRL-R mRNA levels in Nb2 T cells within 1 hour.
  • PRL-R mRNA levels returned to basal levels by 4 hours and declined further by 12 hours post-stimulation.
  • Increased PRL-R RNA levels were observed in the presence of protein synthesis inhibitors, indicating negative regulation of PRL-R mRNA.
  • PRL-R gene expression was detected in normal mouse thymocytes, splenocytes, and various lymphoid cell lines.

Conclusions:

  • PRL-R gene expression is present in diverse lymphoid cells, including thymocytes and splenocytes.
  • PRL signaling rapidly modulates its own receptor mRNA levels in T cells, suggesting a feedback mechanism.
  • These findings support the role of prolactin as a significant immunomodulatory molecule influencing lymphoid cell biology.

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