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- W2029552542 endingPage "1338" @default.
- W2029552542 startingPage "1329" @default.
- W2029552542 abstract "Abstract During development all zebrafish males first develop a “juvenile ovary” that later degenerates and transforms into a testis. In this study, individuals undergoing gonadal transformation were identified from a vas::egfp transgenic line and used for gene expression analysis of anti‐Müllerian hormone ( amh ), ovarian aromatase ( cyp19a1a ) and 11β‐hydroxylase ( cyp11b , also known as P450 11β ) by real‐time polymerase chain reaction and in situ hybridization. In the “normal (i.e., nontransforming) juvenile ovary” cyp19a1a was expressed around the oocytes, but cyp11b and amh could not be detected. During gonadal transformation cyp19a1a was down‐regulated and could not be detected anymore; in contrast amh was up‐regulated and highly expressed at similar regions where cyp19a1a had been expressed earlier. Furthermore, the normalized transcript levels of cyp19a1a and amh showed a reciprocal picture, i.e., the higher was the level of amh , the lower was that of cyp19a1a . Expression of cyp11b was also up‐regulated but later than amh , and its localization was not related to the position of degenerating oocytes. These data indicate that amh is a candidate gene down‐regulating cyp19a1a , leading to “juvenile ovary‐to‐testis” transformation. Whereas, cyp11b or its product, 11‐ketotestosterone, is unlikely to be the inducer of zebrafish gonad transformation, as proposed earlier for some protogynous hermaphroditic fish species. Developmental Dynamics 236:1329–1338, 2007. © 2007 Wiley‐Liss, Inc." @default.
- W2029552542 created "2016-06-24" @default.
- W2029552542 creator A5003140858 @default.
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- W2029552542 date "2007-03-28" @default.
- W2029552542 modified "2023-10-07" @default.
- W2029552542 title "Anti-Müllerian hormone and 11 β-hydroxylase show reciprocal expression to that of aromatase in the transforming gonad of zebrafish males" @default.
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- W2029552542 doi "https://doi.org/10.1002/dvdy.21129" @default.
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