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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/43417

Title: Increase in estrogen signaling in the early brain of orange-spotted grouper Epinephelus coioides: a mini-review
Authors: Nagarajan G
Aruna A
Chang CF
Contributors: 國立臺灣海洋大學:水產養殖學系
Keywords: 10.1007/s10695-012-9667-4
Date: 2013-02
Issue Date: 2017-08-03T03:15:25Z
Publisher: Fish Physiology Biochemical
Abstract: Abstract:Despite neurosteroidogenic enzymes are playing important roles in the regulation of brain development and function, the potential link between brain and gonad by the action of steroid hormones during gonadal sex differentiation is still not clear in teleosts. In this mini-review, we summarized our understanding on the early brain development related to the synthesis of neurosteroids and receptor signaling during gonadal sex differentiation in protogynous orange-spotted grouper, Epinephelus coioides (functional females for the first 6 years of life and start to sex change around the age of 7 years) and protandrous black porgy (functional males for the first 2 years of life but begin to change sex during the third year). We found a similar profile in the increased expression of brain aromatase gene (aromatatse B or cyp19a1b), aromatase activity, estradiol (E(2)), and estrogen signaling in the brain of both grouper and black porgy fish during gonadal sex differentiation. In contrast to mammals, teleost fish Cyp19a1b expressed in a unique cell type, a radial glial cell, which is acted as progenitors in the brain of developing and adult fish. In agreement with these pioneer studies, we demonstrated that the grouper cyp19a1b/Cyp19a1b was expressed in radial glial cells. Further, in vivo data in the grouper brain showed that exogenous E(2) upregulated Cyp19a1b immunoreactivity (ir) in radial glial cells. These data suggest the possible roles of Cyp19a1b and E(2) in early brain development which is presumably related to gonadal sex differentiation.
Relation: 39(1), pp.95-101
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/43417
Appears in Collections:[水產養殖學系] 期刊論文

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