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Related Experiment Videos

Functional melatonin receptors in human prostate epithelial cells

E Gilad1, M Laudon, H Matzkin

  • 1Department of Biochemistry, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel.

Endocrinology
|April 1, 1996
PubMed
Summary

Melatonin binds with high affinity to human benign prostate cells, impacting their growth and viability. This suggests melatonin receptors play a role in prostate health.

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Area of Science:

  • Endocrinology
  • Molecular Biology
  • Cell Biology

Background:

  • Melatonin, a pineal gland hormone, influences reproductive development in mammals.
  • Specific melatonin binding sites have been identified in human benign prostate tissue.

Purpose of the Study:

  • To investigate melatonin binding sites in cultured human benign prostate epithelial cells.
  • To examine the effects of melatonin on the growth and viability of these cells.

Main Methods:

  • Radioligand binding assays using 125I-labeled melatonin.
  • Competition studies with melatonin analogs and related compounds.
  • Assessment of DNA synthesis, RNA synthesis, protein synthesis, and cell viability.

Main Results:

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  • High-affinity melatonin binding sites (K(d) = 68 pM) were confirmed in cultured prostate cells.
  • Melatonin dose-dependently inhibited thymidine and uridine incorporation, with transient effects.
  • Prolonged melatonin exposure reduced cell growth and increased cell death.

Conclusions:

  • Human benign prostate epithelial cells possess high-affinity melatonin receptors.
  • Melatonin influences prostate cell proliferation and survival, suggesting a potential role in prostate physiology.