Woods Hole Oceanographic Institution

Tim Verslycke

»Copepod diapause
»Lobster Shell Disease
»Crustacean molting receptor
»Lobster Shell Disease
»Mysids as test models for endocrine disruption testing
»Chlorotriazines in the Scheldt estuary
»Energy allocation in grasshopper
»Estrogens in Scheldt estuary
»Marsupial development in mysids to evaluate endocrine disruption
»B[a]P effects on steroid metabolism in mysid
»Ciona CYP3 genes
»Methoprene, nonylphenol, and estrone effects on mysid vitellogenesis
»Methoprene effects on mysid molting
»Mysid growth
»Mysid vitellin ELISA
»Mysid vitellin
»An analytical method to detect estrogens in water
»High levels of endocrine disruptors in wild mysid populations
»Energy allocation in wild mysid populations
»Cellular energy allocation validation with scope for growth
»Dolphin delivery prediction
»PhD thesis
»Endocrine disruptor effects on steroid and energy metabolism in mysid
»Mysid review
»TBT effects on steroid metabolism in mysid
»Metal mixture toxicity to mysid
»TBT effects on energy metabolism in mysid
»dichlorobenzene effects in zebrafish
»Ethinylestradiol effects on amphipod sexual development
»Metabolic studies with mysids
»Abiotic stress and energy metabolism in mysid
»Induced vitellogenesis in rainbow trout
»Steroid metabolism in mysid
»Endocrine disruption in freshwater snails
»Invasive mysid in Belgium

An Ghekiere, Martina Fenske, Tim Verslycke, Charles Tyler, Colin Janssen, Development of a quantitative enzyme-linked immunosorbent assay for vitellin in the mysid Neomysis integer (Crustacea, Mysidacea), Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology 142(1):43-49, 2005

Mysid crustaceans have been put forward by several regulatory bodies as suitable test organisms to screen and test the potential effects of environmental endocrine disruptors. Despite the well-established use of mysid reproductive endpoints such as fecundity, egg development time, and time to first brood release in standard toxicity testing, little information exists on the hormonal regulation of these processes. Control of vitellogenesis is being studied intensively because yolk is an excellent model for studying mechanisms of hormonal control, and vitellogenesis can be chemically-disrupted. Yolk protein or vitellin is a major source of nourishment during embryonic development of ovigorous egg-laying invertebrates. The accumulation of vitellin during oocyte development is  vital for the production of viable offspring.  In this context, we developed a competitive enzyme-linked immunosorbent assay (ELISA) for vitellin of the estuarine mysid Neomysis integer. Mysid vitellin was isolated using gel filtration, and the purified vitellin was used to raise polyclonal antibodies. The ELISA was sensitive within a working range of 4 to 500 ng vitellin / ml. Serial dilutions of whole body homogenates from female N. integer and the vitellin standard showed parallel binding curves, validating the specificity of the ELISA. The intra- and interassay coefficients of variation were 8.2 and 13.8%, respectively. Mysid vitellin concentrations were determined from ovigorous females and eggs at different developmental stages. The availability of a quantitative mysid vitellin ELISA should stimulate further studies on the basic biology of this process in mysids. Furthermore, it could provide a means to better understand and predict chemically-induced reproductive effects in mysids. doi:10.1016/j.cbpa.2005.07.006

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