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首页> 外文期刊>Marine biology >The invasive sea slug Pleurobranchaea maculata is a vector of two potent neurotoxins in coasts of Argentina
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The invasive sea slug Pleurobranchaea maculata is a vector of two potent neurotoxins in coasts of Argentina

机译：侵袭性海参Pleurobranchaea maculata是阿根廷沿海地区两种强效神经毒素的载体

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摘要

Toxic exotic organisms can have profound effect as new vectors of keystone compounds in non-native areas. In recent years the invasive sea slug Pleurobranchaea maculata has been reported as thriving along the oriental coasts of South America. The same species had been previously found to contain high levels of tetrodotoxins (TTXs) in its native range. With the aim of determining toxin contents for the introduced individuals we performed mouse bioassays (MBA) and liquid chromatography tandem-mass spectrometry analyses (LC-MS/MS) in three distant populations (-38 degrees 0211, -57 degrees 3128; -40 degrees 2959, -60 degrees 1409; -42 degrees 4415, -65 degrees 0140) and followed the temporal variation in toxin contents in one of them, from June 2014 to January 2015. Relative low levels of TTXs were detected jointly with high levels of PSTs. This is the first identification of TTXs in the temperate coasts of the southwestern Atlantic and the first detection of PSTs in a pleurobranch, in both adults and eggs. Concentrations of PSTs and TTXs varied widely among individuals and populations, and through time. Our results provide new hints on the origin and acquisition mechanisms of these toxins in P. maculata and highlight the risk posed by the introduction of this new vector of potent neurotoxins for seafood safety and marine communities in the invaded area.
机译：有毒的外来生物作为非本地地区主要的梯形化合物的载体，可以产生深远的影响。近年来，有报道称入侵性海参Pleurobranchaea maculata沿着南美的东方海岸蓬勃发展。先前已经发现同一物种在其天然范围内含有高水平的四氧还蛋白（TTX）。为了确定所引入个体的毒素含量，我们在三个远处种群（-38度0211，-57度3128； -40）中进行了小鼠生物测定（MBA）和液相色谱串联质谱分析（LC-MS / MS） 2014年6月至2015年1月，其中一种毒素的含量相对较低，而高含量的TTX含量则在2014年6月至2015年1月之间。 PST。这是在西南大西洋温带沿海地区首次鉴定出TTX，也是在胸支中成年和卵中首次检测到PST。 PST和TTX的浓度在个人和人群之间以及时间上差异很大。我们的结果为斑节对虾中这些毒素的来源和获取机制提供了新的提示，并突出了这种新的强效神经毒素载体对入侵地区的海鲜安全和海洋社区的危害。

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  • 来源
    《Marine biology》 |2019年第7期|82.1-82.11|共11页
  • 作者

    Farias Nahuel E.; Goya Alejandra B.; Schwindt Evangelina; Obenat Sandra; Dhanji-Rapkova Monika; Turner Andrew D.;

  • 作者单位

    Univ Nacl Mar del Plata, FCEyN, Lab Invertebrados, Mar Del Plata, Buenos Aires, Argentina|Consejo Nacl Invest Cient & Tecn, IIMyC, Mar Del Plata, Buenos Aires, Argentina;

    Ctr Reg Buenos Aires Sur SENASA, Dept Toxinas Marinas, Lab Reg Mar del Plata, Serv Nacl Sanidad & Calidad Agroalimentaria, Mar Del Plata, Buenos Aires, Argentina;

    Grp Ecol Ambientes Costeros GEAC IBIOMAR CONICET, Puerto Madryn, Argentina;

    Univ Nacl Mar del Plata, FCEyN, Lab Invertebrados, Mar Del Plata, Buenos Aires, Argentina|Consejo Nacl Invest Cient & Tecn, IIMyC, Mar Del Plata, Buenos Aires, Argentina;

    CEFAS, Barrack Rd, Weymouth DT4 8UB, Dorset, England;

    CEFAS, Barrack Rd, Weymouth DT4 8UB, Dorset, England;

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