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RANKL regulates male reproductive function.

Martin Blomberg Jensen1,2, Christine Hjorth Andreassen3, Anne Jørgensen4

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The transmembrane receptor activator of NF-kB ligand (RANKL) system regulates male fertility. Targeting RANKL shows potential for treating male infertility, though further research is needed for predictive biomarkers.

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Area of Science:

  • Reproductive Biology
  • Endocrinology
  • Molecular Biology

Background:

  • Male infertility presents limited treatment avenues.
  • The transmembrane receptor activator of NF-kB ligand (RANKL) signaling pathway is implicated in reproductive function.

Purpose of the Study:

  • To investigate the role of the RANKL/RANK/osteoprotegerin (OPG) system in male reproductive function.
  • To assess the therapeutic potential of targeting RANKL in male infertility.

Main Methods:

  • Analysis of RANKL, RANK, and OPG expression in mouse and human testes.
  • Pharmacological and genetic manipulation of RANKL signaling in mice.
  • Measurement of seminal fluid RANKL levels and serum hormones in infertile men.

Main Results:

  • RANKL/RANK signaling is active in the testis, with RANKL expressed in Sertoli cells and RANK in germ cells.
  • OPG treatment and genetic suppression of RANKL enhance sperm counts and male fertility in mice.
  • Seminal fluid RANKL levels differentiate fertile from infertile men; Denosumab treatment reduced RANKL and increased certain hormone levels in infertile men.

Conclusions:

  • The RANKL signaling pathway is a key regulator of male reproductive function.
  • Targeting RANKL may offer a novel therapeutic strategy for male infertility.
  • Predictive biomarkers are necessary to identify men who will benefit from RANKL-targeted therapies.