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- W2017123279 abstract "► Key endocrine genes were measured in male and female juvenile yellow perch. ► Pituitary gh and liver igf1b mRNA were correlated with growth in both sexes. ► Sex-specific expression of liver estrogen receptors was found. ► Dietary estrogen increased liver esr1 mRNA expression. The present study examines the expression of growth-regulating genes ( gh , prl , smtl and igf1b ), the estrogen receptors ( esr1 and esr2a ) and aromatase ( cyp19a1a ) in developing yellow perch. To gain an initial understanding into the endocrine control of growth preceding and involved with sexual size dimorphism (SSD), where females have been reported to grow faster and larger than males, young of the year fish were sampled for length, weight and tissues at several time points (102–421 days post-hatch (dph)). Positive growth was seen in both sexes over the sampling interval, but SSD was not manifested. Using real-time quantitative PCR, we found that pituitary growth hormone ( gh ) and liver insulin-like growth factor-1b ( igf1b ) mRNA levels were significantly affected by dph and levels were found to be correlated with growth in both sexes. Liver cyp19a1a , esr1 and esr2a mRNA levels were significantly influenced by dph, whereas there was a significant dph * sex interaction on liver esr2a mRNA levels with males having higher levels than females at 379 and 421 dph. Ovarian cyp19a1a decreased with dph, but there were no changes in esr1 or esr2a mRNA levels. Dietary treatment of juvenile (∼300 dph) females with 20 mg/kg diet 17β-estradiol resulted in significantly higher liver esr1 mRNA levels and a sustained hepatosomatic index ( I H ). Across all data sets liver esr2a mRNA levels showed the most significant positive correlation with liver igf1b mRNA levels. These findings show that growth is accompanied by increases in pituitary gh , liver igf1b and liver esr1 and esr2a mRNAs in juvenile yellow perch." @default.
- W2017123279 created "2016-06-24" @default.
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- W2017123279 creator A5066746359 @default.
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- W2017123279 date "2011-04-01" @default.
- W2017123279 modified "2023-09-24" @default.
- W2017123279 title "Developmental expression and estrogen responses of endocrine genes in juvenile yellow perch (Perca flavescens)" @default.
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- W2017123279 doi "https://doi.org/10.1016/j.ygcen.2011.01.003" @default.
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