The study will investigate sex steroid-regulated gene expression in two sexually dimorphic brain regions i.e. the preoptic region, the bed nucleus of stria terminalis and the ventromedial hypothalamic nucleus, which are part of the neural network controlling sexually dimorphic behaviours […]
The mammalian brain and pituitary gland (hypophysis) are clearly target organs for steroid and thyroid hormone action. There is also evidence that prenatal (in utero) or neonatal (young) exposure to high concentrations of some chemicals can affect the developing nervous […]
The aim of the study was to study neuro-endocrine regulation, particularly the brain-pituitary-gonad (BPG) axis, 3 freshwater fish species (catfish, trout and tilapia) exposed to 4-nonyl phenol (4-NP) or oestradiol (EE). The research also sought to establish an immortalised gonadotroph […]
An in vivo screening test for oestrogenicity was developed jointly by three laboratories by measuring vitellogenin in fathead minnows after up to 21 days exposure. This method will be further refined by determination of (anti-)androgens and aromatase inhibitors in the […]
Evaluate the published information on the reproductive endocrinology of aquatic invertebrates with a view to evaluate their potential use in aquatic hazard identification of endocrine modulators.
Conduct a literature review on present understanding of sex determination mechanisms in wildlife and the current use of markers of genetic sex for wildlife species selected for use in the testing and evaluation of effects of endocrine modulators. This knowledge […]
The objective of this project was the evaluation and validation of the Hershberger assay as part of the official OECD validation of this test method. This test, developed under the EDTA programme, is designed to help detect chemicals interfering with […]
The objective of this project was the evaluation and validation of the uterotrophic assay as part of the official OECD validation of this test method. This uterotrophic bioassay is intended to identify the in vivo activity of compounds that are […]
Concerns that toxicological test guidelines may not optimally detect effects on the endocrine system have lead to proposals to enhance the current sub-acute rodent OECD Test Guideline No. 407 (OECD 1995). The efficacy of the modified enhanced (phase 2) protocol […]
OECD Test Guideline Validation: to provide a set of defined test chemicals for the OECD test methods development for endocrine active chemicals and to guarantee that test method validation under OECD leads to reliable results by always using the same […]
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