Understanding relaxin signalling at the cellular level

Adam L. Valkovic, Ross AD Bathgate, Chrishan S. Samuel, Martina Kocan

Research output: Contribution to journalReview ArticleResearchpeer-review

11 Citations (Scopus)


The peptide hormone relaxin mediates many biological actions including anti-fibrotic, vasodilatory, angiogenic, anti-inflammatory, anti-apoptotic, and organ protective effects across a range of tissues. At the cellular level, relaxin binds to the G protein-coupled receptor relaxin family peptide receptor 1 (RXFP1) to activate a variety of downstream signal transduction pathways. This signalling cascade is complex and also varies in diverse cellular backgrounds. Moreover, RXFP1 signalling shows crosstalk with other receptors to mediate some of its physiological functions. This review summarises known signalling pathways induced by acute versus chronic treatment with relaxin across a range of cell types, it describes RXFP1 crosstalk with other receptors, signalling pathways activated by other ligands targeting RXFP1, and it also outlines physiological relevance of RXFP1 signalling outputs. Comprehensive understanding of the mechanism of relaxin actions in fibrosis, vasodilation, as well as organ protection, will further support relaxin's clinical potential.

Original languageEnglish
Pages (from-to)24-33
Number of pages10
JournalMolecular and Cellular Endocrinology
Publication statusPublished - 1 May 2019


  • GPCR
  • Insulin-like peptides
  • Relaxin
  • RXFP1

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