General and comparative endocrinology

Red pigment concentrating hormone in female mud crabs and how serotonin affects its levels

Circadian Biology Weekly Brief ↗PubMed ↗DOI ↗

Updated

Abstract

A full-length cDNA for the red pigment concentrating hormone (RPCH) preprohormone gene (Scyol-RPCH) was isolated from the eyestalks of female mud crabs.

  • The open reading frame of Scyol-RPCH consists of 642 nucleotides, encoding a 108 amino acid precursor protein.
  • The RPCH peptide exhibits 100% identity with similar peptides from 15 other decapods.
  • Expression of Scyol-RPCH occurs in the eyestalk, brain, and ventral nerve cord of adult mud crabs.
  • In situ hybridization reveals specific expression in various neuronal clusters within the eyestalk and brain.
  • Administration of 5-HT up-regulates RPCH gene expression in the eyestalk, indicating a potential link between 5-HT and RPCH.

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