Thierry Bailhache

TL;DR: Examining the brains of adult male and female rainbow trout failed to demonstrate any evidence that gonadotrophin‐releasing hormone neurons coexpress estrogen receptor in the brain of the rainbow trout, but double‐staining studies showed that, although some estrogen receptor‐positive cells were in close proximity to gonadtrophin releasing hormone‐immunoreactive perikarya, careful examination of 550 gonadOTrophinreleasing hormones failed to demonstrating any evidence of coexpression.

TL;DR: The majority of transgenic animals that had integrated one copy of the transgene into their genome and transmitted it through the germline reached maturity at the same time as did nontransgenic individuals, although the maturation of AS(+) animals seemed to be more asynchronous.

TL;DR: The data indicate that target cells for estradiol are essentially located in brain regions involved in the neuroendocrine control of pituitary functions and having direct connections with the hypophysis, in partial agreement with those obtained after injection of tritiated‐estradiol in other teleots species.

TL;DR: Immunocytochemistry performed on brain and pituitary of female trout revealed the presence of rtER in neurons located in the ventral telencephalon, preoptic area and mediobasal hypothalamus, as well as cells in the proximal pars distalis of the pituitsary.

TL;DR: Recent data obtained in the laboratory regarding the distribution and regulation of expression of estrogen receptors in the brain and pituitary gland of the rainbow trout are reviewed, using both in situ hybridization or immunohistochemistry.