Journal of experimental zoology. Part B, Molecular and developmental evolution

Triggering egg development in Penaeus monodon using molecular signals

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Abstract

VTG mRNA levels increased in the ovary and hepatopancreas of unilateral eyestalk-ablated and inhibitor-treated shrimps.

  • Vitellogenin (VTG) synthesis is negatively regulated by vitellogenesis-inhibiting hormone (VIH) in penaeid shrimp.
  • Eyestalk ablation is commonly used to induce ovarian maturation but can lead to loss of the spawner.
  • Inhibition of the MEK pathway using U0126 resulted in no detection of phospho-MEK in treated shrimps.
  • DAX-1, SF-1, and StAR gene expression changes were associated with alterations in VIH mRNA and phospho-ERK levels.
  • The findings suggest that suppression of DAX-1 may lead to increased SF-1 and StAR protein levels, which are involved in estradiol production linked to vitellogenesis.
  • This study provides new insights into the molecular mechanisms of VIH suppression, offering a potentially less-invasive alternative to traditional methods.

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