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Potential roles of transglutaminase and thioredoxin in the release of gonad-stimulating factor in Penaeus monodon: Implication from differential expression in the brain during ovarian maturation cycle
Possible roles of two enzymes in releasing reproductive hormones in Penaeus monodon based on their changing brain levels during egg development
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Abstract
Ten transcripts exhibited up-regulated expression in black tiger shrimp after suppression of gonad-inhibiting hormone.
- Gonad-stimulating factors synthesized in the brain and thoracic ganglia induce vitellogenin synthesis during ovarian maturation in crustaceans.
- A gonad-inhibiting hormone from the eyestalk negatively regulates this process.
- Five transcripts showed down-regulated expression in shrimp treated with GIH-specific dsRNA.
- Nucleotide sequence analysis revealed that the cloned thioredoxin cDNA is highly similar to thioredoxin found in other crustaceans.
- The thioredoxin gene and other up-regulated genes were expressed in the brain during the ovarian maturation cycle, with the highest levels detected in early-vitellogenic females.
- The study suggests a potential role for transglutaminase and thioredoxin in regulating the gonad-stimulating pathway in shrimp.
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