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Molecular characterization of a vitellogenesis-inhibiting hormone (VIH) in the mud crab (Scylla olivacea) and temporal changes in abundances of VIH mRNA transcripts during ovarian maturation and following neurotransmitter administration
Molecular details of a hormone that stops egg yolk production in mud crabs and how its gene levels change during egg development and after nerve chemical treatment
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Abstract
A full-length Scylla olivacea vitellogenesis-inhibiting hormone (Scyol-VIH) gene consists of 378 nucleotides encoding a 126-amino acid precursor protein.
- Scyol-VIH is a neuropeptide hormone that regulates vitellogenesis during gonad maturation in crustaceans.
- Expression of the Scyol-VIH gene was observed in immature female Scylla olivacea within the eyestalk, brain, and ventral nerve cord.
- Higher levels of Scyol-VIH mRNA were found in the eyestalk of immature females, decreasing with ovarian maturation.
- Scyol-VIH expression was localized to specific regions including the eyestalk X-organ and certain brain neuronal clusters.
- Eyestalk Scyol-VIH levels increased following dopamine injection, suggesting a possible regulatory mechanism.
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