Cited by 225Hypothalamic control of reproductive hormonesNeuropeptides and Animal PhysiologyNeuroendocrine regulation and behavior

Evolution of GnRH: Diving deeper

Roch, Graeme J., Busby, Ellen R., Sherwood, Nancy M.·2011·General and Comparative Endocrinology

Abstract

Gonadotropin-releasing hormone (GnRH) plays a central role in vertebrate reproduction. The evolutionary origin of this neuropeptide and its receptor is not obvious, but the advent of genomics makes it possible to examine the roots of GnRH and delve deeper into its ancestral relationships. New peptide sequences identified in invertebrates from annelids to tunicates reveal GnRH-like peptides of 10-12 amino acids. Structural conservation suggests homology between the 15 known invertebrate peptides and the 15 known vertebrate GnRHs. The functions of the invertebrate GnRH-like peptides are not necessarily related to reproduction. We suggest that structurally related families of invertebrate peptides including corazonin and adipokinetic hormone (AKH) form a superfamily of neuropeptides with the GnRH family. GnRH receptors have also been identified in invertebrates from annelids to tunicates suggesting that the origin of GnRH and its receptor extends deep in evolution to the origin of bilaterian animals. To resolve the relationship of invertebrate and vertebrate receptors, we conducted large-scale phylogenetic analysis using maximum likelihood. The data support a superfamily that includes GnRH, AKH and corazonin receptors derived from both published sequences and unpublished gene model predictions. Closely related to the GnRHR superfamily is the vasopressin/oxytocin superfamily of receptors. Phylogenetic analysis suggests a shared ancestry with deep roots. A functional role for GnRH in vertebrates or invertebrates leads to questions about the evolutionary origin of the pituitary. Our analysis suggests a functioning pituitary was the result of genomic duplications in early vertebrates.

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Crossref · 10.1016/j.ygcen.2010.12.014

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Authors
Roch, G. J., Busby, E. R., & Sherwood, N. M.
Affiliations
University of Victoria (CA)
Corresponding author
Sherwood, Nancy M.
Venue
General and Comparative Endocrinology
Publisher
Elsevier BV
Published
2011-03
Volume
171
Issue
1
Pages
1-16
ISSN
0016-6480 (ISSN-L)
OpenAlex
W2081962689
Cited by
225
References
117
Citations by year
2026: 9 · 2025: 4 · 2024: 8 · 2023: 10 · 2022: 8 · 2021: 11 · 2020: 17 · 2019: 11 · 2018: 14 · 2017: 16 · 2016: 21 · 2015: 15 · 2014: 21 · 2013: 31 · 2012: 24
FWCI
2.69
Type
journal article
Language
en
Open access
closed
Locations
  • General and Comparative Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
Keywords
gonadotropin-releasing hormone, GnRH receptor, neuropeptide evolution, corazonin, adipokinetic hormone, receptor phylogeny, genomic duplication, vertebrate reproduction, bilaterian origin
MeSH terms
Amino Acid Sequence, Animals, Humans, Gonadotropin-Releasing Hormone, Molecular Sequence Data, Phylogeny, Receptors, LHRH, Sequence Homology, Amino Acid, Evolution, Molecular

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