General and comparative endocrinology

How chemical signals affect egg protein gene levels in incubated ovarian tissue of kuruma prawns

Circadian Biology Weekly Brief ↗PubMed ↗DOI ↗

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Abstract

After 24 hours of incubation, various pharmacological agents decreased VTG mRNA levels in the ovarian fragments of the kuruma prawn.

  • Calcium ionophores, cyclic nucleotides, and protein kinase C activators are associated with the intracellular signalling pathways that regulate VTG synthesis.
  • The inhibitory effects on VTG mRNA levels were more pronounced in previtellogenic ovaries compared to vitellogenic ovaries.
  • The study suggests that responsiveness to the vitellogenesis-inhibiting hormone changes during ovarian development.
  • Maturity-related changes in cellular signalling mechanisms may influence the degree of responsiveness to the vitellogenesis-inhibiting hormone.

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