Hormones and receptors in fish

Do duplicates matter?

Graeme J. Roch, Sheng Wu, Nancy M. Sherwood

Research output: Contribution to journalArticle

Abstract

Modern fish are the result of major changes in evolution including three possible duplications of the whole genome. Retained duplicate genes are often involved with metabolism, transcription, neurogenic processes and development. Here we examine the consequences of the most recent (350 mya) teleost-specific duplication in five fishes (zebrafish, fugu, medaka, stickleback and rainbow trout) in regard to duplicate copies of hormones and receptors in the secretin superfamily. This subset of genes was selected as the superfamily is limited to ten hormones and their receptors and includes some important members: glucagon, growth hormone-releasing hormone (GHRH), pituitary adenylate cyclase-activating polypeptide (PACAP) and vasoactive intestinal polypeptide (VIP). We used reports from the literature and an extensive database search of the fish genomes to evaluate the status of the superfamily and its duplicate genes. We found that all five fish species have an almost complete set of orthologs with the human superfamily of hormones, although they lack secretin and its receptor. Receptor orthologs are present in zebrafish, fugu, medaka, stickleback and to a lesser extent in salmonids. Zebrafish retain duplicate copies for seven hormones and five receptors. Duplicated genes in fugu, medaka, stickleback and salmonids are also present, based mainly on genome annotation or mRNA transcription. Separate chromosome locations and synteny support zebrafish duplicates as the result of large-scale duplications. Novel changes in fish include the modification of a duplicate glucagon receptor to a GLP-1 receptor and, unlike humans, the presence of bioactive and specific PHI and GHRH-like peptide receptors. We conclude that fish duplicates in the secretin superfamily are a rich, mostly unexplored area for endocrine research.

Original languageEnglish (US)
Pages (from-to)3-12
Number of pages10
JournalGeneral and Comparative Endocrinology
Volume161
Issue number1
DOIs
StatePublished - Mar 2009
Externally publishedYes

Fingerprint

Fishes
Takifugu
hormones
Hormones
Zebrafish
Oryzias
Smegmamorpha
Danio rerio
receptors
Gasterosteidae
Duplicate Genes
fish
secretin
Salmonidae
somatoliberin
duplicate genes
Growth Hormone-Releasing Hormone
Genome
genome
transcription (genetics)

Keywords

  • 7TM receptors
  • Family B receptors
  • Fugu
  • Gene duplicates
  • GHRH
  • GHRH-LP
  • GIP
  • GLP-1
  • GLP-2
  • Glucagon
  • Hormones
  • Medaka
  • PACAP
  • PHI
  • PRP
  • Rainbow trout
  • Salmonids
  • Secretin superfamily
  • Stickleback
  • Teleost fish
  • VIP
  • Whole genome duplication
  • Zebrafish

ASJC Scopus subject areas

  • Endocrinology

Cite this

Hormones and receptors in fish : Do duplicates matter? / Roch, Graeme J.; Wu, Sheng; Sherwood, Nancy M.

In: General and Comparative Endocrinology, Vol. 161, No. 1, 03.2009, p. 3-12.

Research output: Contribution to journalArticle

Roch, Graeme J. ; Wu, Sheng ; Sherwood, Nancy M. / Hormones and receptors in fish : Do duplicates matter?. In: General and Comparative Endocrinology. 2009 ; Vol. 161, No. 1. pp. 3-12.
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