17α-Ethynylestradiol (EE2) is a synthetic hormone that has become a widespread problem in the aqu... more 17α-Ethynylestradiol (EE2) is a synthetic hormone that has become a widespread problem in the aquatic environments. The immunomodulatory effects of EE2 in fish have attracted much attention in recent years; however, little is known about its immunotoxicological impacts. This study was conducted to investigate the immune function of female Siamese fighting fish exposed to an environmental concentration of EE2, 10 ng/L. Aggressive reproductive behavior in this species often results in injuries to females after spawning, and thus they are a good candidate in immunotoxic actions of EE2. Fish were exposed to EE2 for 15 days and then distributed for breeding. Immune function, pathogen resistance, and survival rate were assessed after spawning. Immune responses including serum concentrations of IgM, lysozyme, complement, and bactericidal activity were lower in EE2-exposed females than the control fish. Also, EE2-exposed females showed higher mortality rate regardless of whether they were challenged with the bacterium. These results suggest that EE2 suppressed immune responses of spawned female fighting fish, thereby reducing its potential to resist against opportunistic pathogens.
Tony Trewavas of Edinburgh University claims that plants have the power to compute, show foresigh... more Tony Trewavas of Edinburgh University claims that plants have the power to compute, show foresight and remember what happens to them, to such a degree that it may be regarded as underpinning a novel form of intelligence. The only real difference between plants and animals is the ...
17α-Ethynylestradiol (EE2) is a synthetic hormone that has become a widespread problem in the aqu... more 17α-Ethynylestradiol (EE2) is a synthetic hormone that has become a widespread problem in the aquatic environments. The immunomodulatory effects of EE2 in fish have attracted much attention in recent years; however, little is known about its immunotoxicological impacts. This study was conducted to investigate the immune function of female Siamese fighting fish exposed to an environmental concentration of EE2, 10 ng/L. Aggressive reproductive behavior in this species often results in injuries to females after spawning, and thus they are a good candidate in immunotoxic actions of EE2. Fish were exposed to EE2 for 15 days and then distributed for breeding. Immune function, pathogen resistance, and survival rate were assessed after spawning. Immune responses including serum concentrations of IgM, lysozyme, complement, and bactericidal activity were lower in EE2-exposed females than the control fish. Also, EE2-exposed females showed higher mortality rate regardless of whether they were challenged with the bacterium. These results suggest that EE2 suppressed immune responses of spawned female fighting fish, thereby reducing its potential to resist against opportunistic pathogens.
Tony Trewavas of Edinburgh University claims that plants have the power to compute, show foresigh... more Tony Trewavas of Edinburgh University claims that plants have the power to compute, show foresight and remember what happens to them, to such a degree that it may be regarded as underpinning a novel form of intelligence. The only real difference between plants and animals is the ...
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