Molecules (Dec 2021)

High-Throughput Screening Campaign Identified a Potential Small Molecule RXFP3/4 Agonist

  • Guangyao Lin,
  • Yang Feng,
  • Xiaoqing Cai,
  • Caihong Zhou,
  • Lijun Shao,
  • Yan Chen,
  • Linhai Chen,
  • Qing Liu,
  • Qingtong Zhou,
  • Ross A.D. Bathgate,
  • Dehua Yang,
  • Ming-Wei Wang

DOI
https://doi.org/10.3390/molecules26247511
Journal volume & issue
Vol. 26, no. 24
p. 7511

Abstract

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Relaxin/insulin-like family peptide receptor 3 (RXFP3) belongs to class A G protein-coupled receptor family. RXFP3 and its endogenous ligand relaxin-3 are mainly expressed in the brain with important roles in the regulation of appetite, energy metabolism, endocrine homeostasis and emotional processing. It is therefore implicated as a potential target for treatment of various central nervous system diseases. Since selective agonists of RXFP3 are restricted to relaxin-3 and its analogs, we conducted a high-throughput screening campaign against 32,021 synthetic and natural product-derived compounds using a cyclic adenosine monophosphate (cAMP) measurement-based method. Only one compound, WNN0109-C011, was identified following primary screening, secondary screening and dose-response studies. Although displayed agonistic effect in cells overexpressing the human RXFP3, it also showed cross-reactivity with the human RXFP4. This hit compound may provide not only a chemical probe to investigate the function of RXFP3/4, but also a novel scaffold for the development of RXFP3/4 agonists.

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