In vivo and in vitro inhibitory action of 17β-estradiol and environmental estrogen 4-nonylphenol on gonad-inhibiting hormone (GIH) expression in the eyestalks of Litopenaeus vannamei

Nov 5, 2015Genetics and molecular research : GMR

17β-estradiol and environmental estrogen 4-nonylphenol reduce hormone that controls reproduction in shrimp eyestalks

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Abstract

LvGIH expression decreased significantly during the ovarian maturation cycle of L. vannamei.

  • 17β-estradiol (E2) and the environmental estrogen nonylphenol (NP) significantly reduced LvGIH transcript levels in vivo.
  • The estrogen receptor antagonist tamoxifen (TAM) neutralized the inhibitory action of E2 on LvGIH expression in a dose-dependent manner.
  • In vitro culture of ovary fragments with E2 led to a significant decrease in LvGIH expression over time.
  • The findings suggest that estrogen may regulate GIH expression in L. vannamei eyestalks, contributing to ovarian development.

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