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首页> 外文期刊>Archives of Toxicology >Synergistic effects of some metals contaminating mussels on the cytotoxicity of the marine toxin okadaic acid.
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Synergistic effects of some metals contaminating mussels on the cytotoxicity of the marine toxin okadaic acid.

机译:某些金属污染贻贝对海洋毒素冈田酸的细胞毒性具有协同作用。

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Okadaic acid (OA), a marine toxin is cytotoxic and promotes tumours in mouse skin. It is a specific and potent inhibitor of protein synthesis and also inhibits phosphatases A1 and A2 in vitro. In the present study, we investigated the influence of metals found at acceptable levels in mussels as environmental pollutants on the cytotoxicity of OA in Vero cells. Among the metals found in mussels (Mytilus edulis), the most represented, in terms of molar quantities per gram of dried weight are aluminium (230 nmol/g), copper (58 nmol/g), lead (16 nmol/g), mercury (14 nmol/g) and cadmium (7.4 nmol/g). A solution containing these five metals Al(3+), Cu(2+), Pb(2+), Hg(2+) and Cd(2+) combined at the concentrations detected in mussels, stimulated protein synthesis (+25%, P < 0.01), whereas different dilutions of this solution in the presence of okadaic acid (15 ng/ml, i.e. 18.7 x 10(-9) M) increased the percentage of protein synthesis inhibition from 35 to 79%. The metals also increased the lactate dehydrogenase (LDH) release into the medium and the lipid peroxidation induced by this algal toxin. In addition, these metals reduced the cell viability for an incubation period of 24 h especially at the two higher concentrations. These results indicate that metals (Al(3+), Cu(2+), Pb(2+), Hg(2+), Cd(2+)) in concentration ranges largely below the acceptable levels, synergistically increase the cytotoxicity of low concentrations of OA in cultured cells.
机译:冈田酸(OA)是一种海洋毒素,具有细胞毒性,可促进小鼠皮肤中的肿瘤。它是蛋白质合成的特异性和有效抑制剂,并且在体外还抑制磷酸酶A1和A2。在本研究中,我们调查了贻贝中可接受的金属作为环境污染物对Vero细胞中OA细胞毒性的影响。在贻贝(Mytilus edulis)中发现的金属中,以每克干重的摩尔量计,代表最多的是铝(230 nmol / g),铜(58 nmol / g),铅(16 nmol / g),汞(14 nmol / g)和镉(7.4 nmol / g)。包含这五种金属Al(3 +),Cu(2 +),Pb(2 +),Hg(2+)和Cd(2+)的溶液以贻贝中检测到的浓度组合,可刺激蛋白质合成(+ 25% ,P <0.01),而在冈田酸(15 ng / ml,即18.7 x 10(-9)M)存在下,该溶液的不同稀释度会使蛋白质合成抑制的百分比从35%增至79%。这些金属还增加了乳酸脱氢酶(LDH)释放到培养基中以及这种藻毒素诱导的脂质过氧化作用。此外,这些金属降低了细胞活力,尤其是在两种较高浓度下,在24小时的孵育时间内。这些结果表明,浓度范围内的金属(Al(3 +),Cu(2 +),Pb(2 +),Hg(2 +),Cd(2+))大大低于可接受的水平,从而协同增加了细胞毒性。培养细胞中低浓度的OA。

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