Early regulation of brain aromatase (cyp19a1b) by estrogen receptors during zebrafish development

K. Mouriec, J. J. Lareyre, S. K. Tong, Y. Le Page, C. Vaillant, E. Pellegrini, F. Pakdel, B. C. Chung, Olivier Kah, Isabelle Anglade

Research output: Contribution to journalArticlepeer-review

80 Citations (Scopus)


Early expression of estrogen receptors (esr) and their role in regulating early expression of cyp19a1b encoding brain aromatase were examined in the brain of zebrafish. Using in toto hybridization and quantitative reverse transcriptase-polymerase chain reaction (RT-PCR), a significant increase in the expression of esr1, esr2a, and esr2b was observed between 24 and 48 hours postfertilization (hpf). In toto hybridization demonstrated that esr2a and esr2b, but not esr1, are found in the hypothalamus. Using real-time RT-PCR, an increase in cyp19a1b mRNAs occurs between 24 and 48 hpf, indicating that expression of cyp19a1b is temporally correlated with that of esr. This increase is blocked by the pure anti-estrogen ICI182,780. Furthermore, E2 treatment of cyp19a1b-GFP (green fluorescent protein) transgenic embryos results in appearance of GFP expression in the brain as early as 25 hpf. These results indicate that basal expression of cyp19a1b expression in the brain of developing zebrafish most likely relies upon expression of esr that are fully functional before 25 hpf.

Original languageEnglish
Pages (from-to)2641-2651
Number of pages11
JournalDevelopmental Dynamics
Issue number10
Publication statusPublished - Oct 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Developmental Biology


Dive into the research topics of 'Early regulation of brain aromatase (cyp19a1b) by estrogen receptors during zebrafish development'. Together they form a unique fingerprint.

Cite this