Cited by 192Hypothalamic control of reproductive hormonesReproductive biology and impacts on aquatic speciesNeuropeptides and Animal Physiology

Isolation and characterization of a GnRH-like peptide from Octopus vulgaris

Iwakoshi, Eiko, Takuwa-Kuroda, Kyoko, Fujisawa, Yuko, Hisada, Miki, Ukena, Kazuyoshi, Tsutsui, Kazuyoshi, Minakata, Hiroyuki·2002·Biochemical and Biophysical Research Communications

Abstract

Gonadotropin-releasing hormone (GnRH) is the key peptide in the hypothalamo-hypophysial-gonadal axis, the core of regulation of reproduction in vertebrates. In this study, an octopus peptide with structural features similar to vertebrate GnRHs was isolated from brains of Octopus vulgaris. This peptide showed luteinizing hormone-releasing activity in quail anterior pituitary cells. A cDNA encoding the precursor protein was cloned. The RT-PCR transcripts were expressed in the supraesophageal and subesophageal brains, peduncle complex, and optic gland. The presence of the peptide in the different brain region was confirmed with enzyme-linked immunosorbent assay and time-of-flight mass spectrometric analysis. Immunoreactive neuronal cell bodies and fibers were observed in the subpedunculate lobe that controls the optic-gland activity. Optic gland nerves and glandular cells in the optic gland were immunostained. The isolated peptide may be octopus GnRH that contributes to octopus reproduction not only as a neurohormone but also as an endocrine hormone.

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Crossref · 10.1006/bbrc.2002.6594

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Authors
Iwakoshi, E., Takuwa-Kuroda, K., Fujisawa, Y., Hisada, M., Ukena, K., Tsutsui, K., & Minakata, H.
Affiliations
Hiroshima University (JP)
Corresponding author
Minakata, Hiroyuki
Venue
Biochemical and Biophysical Research Communications
Publisher
Elsevier BV
Published
2002-03
Volume
291
Issue
5
Pages
1187-1193
ISSN
0006-291X (ISSN-L)
OpenAlex
W2011815428
Cited by
192
References
24
Citations by year
2026: 3 · 2025: 1 · 2024: 3 · 2023: 3 · 2022: 5 · 2021: 8 · 2020: 6 · 2019: 8 · 2018: 2 · 2017: 5 · 2016: 10 · 2015: 11 · 2014: 3 · 2013: 9 · 2012: 8
FWCI
12.77
Type
journal article
Language
en
Open access
closed
Locations
  • Biochemical and Biophysical Research Communications (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Reproductive biology and impacts on aquatic species
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
gonadotropin-releasing hormone, Octopus vulgaris, luteinizing hormone secretion, anterior pituitary cells, cDNA cloning, neurohormones, cephalopod reproduction
MeSH terms
Amino Acid Sequence, Animals, Base Sequence, Central Nervous System, Immunohistochemistry, Gonadotropin-Releasing Hormone, Molecular Sequence Data, Peptides, DNA, Complementary, Octopodiformes

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