Morphological effects of Bisphenol-A on the early life stages of medaka (Oryzias latipes).
Bisphenol-A (BPA), a widely used polycarbonate plasticizer, has been of concern because it has been shown to leach out of plastics and other epoxy products. Primary sources of environmental releases are expected to be from BPA and epoxy manufacturing facilities. Although environmental concentrations may be limited, little is known about the effects of this compound on fish, particularly during their most sensitive early life stages. A pilot study exposing newly hatched medaka to 200 microg BPA/l for 96 h showed to be non-lethal. In addition, medaka embryos were exposed beginning at 5 h post-fertilization, for 9 days at 25 degrees C, to concentrations of 20 or 200 microg BPA/l (24 h static renewal). Embryos were monitored daily for development and gross abnormalities. Embryos exposed to 200 microg BPA/l did not exhibit abnormalities until after day 4. However, between days 4 and 8 the severity index (SI) score of embryos was significantly greater than those exposed to lesser concentrations. By day 9, SI scores were not statistically different among treatments. BPA caused transient embryonic deformities in medaka at environmentally relevant concentrations.
Pastva
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SD
Department of Fisheries and Wildlife, Institute of Environmental Toxicology, National Food Safety and Toxicology Center, Michigan State University, East Lansing 48824, USA. pastvast@msu.edu
Villalobos
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SA
Kannan
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Giesy
J P
JP
D000014:Abnormalities, Drug-Induced / Q000662:veterinary*; D000818:Animals; D001559:Benzhydryl Compounds; D004305:Dose-Response Relationship, Drug; D047108:Embryonic Development; D004781:Environmental Exposure; D004968:Estrogens, Non-Steroidal / Q000009:adverse effects*; D007814:Larva / Q000254:growth & development; D009990:Oryzias / Q000196:embryology* / Q000254:growth & development*; D010636:Phenols / Q000009:adverse effects*; D012720:Severity of Illness Index; D000098826:Bisphenol A Compounds
D001559:Benzhydryl Compounds; D004968:Estrogens, Non-Steroidal; D010636:Phenols; C006780:bisphenol A; D000098826:Bisphenol A Compounds