Congener-Independent Immunoassay for Microcystins and Nodularins
作者:Werner J. Fischer、Ian Garthwaite、Christopher O. Miles、Kathryn M. Ross、James B. Aggen、A. Richard Chamberlin、Neale R. Towers、Daniel R. Dietrich
DOI:10.1021/es011182f
日期:2001.12.1
microcystin (MC) heptapeptides (>60 congeners) and the nodularinpentapeptides (ca. 5 congeners). Cyanobacterial cyclic peptide toxins are harmful to man, other mammals, birds, and fish. Acute exposure to high concentrations of these toxins causes liver damage, while subchronic or chronic exposure may promote liver tumor formation. The detection of cyclic peptide cyanobacterial toxins in surface and drinking
在全球淡水和微咸水中发现了能够产生毒性肽的蓝细菌(蓝藻)(例如微囊藻和结节藻属)。这些毒素包括微囊藻毒素(MC)七肽(> 60个同类物)和结节蛋白五肽(约5个同类物)。蓝细菌环肽毒素对人类,其他哺乳动物,鸟类和鱼类有害。急性暴露于高浓度这些毒素会导致肝损害,而亚慢性或慢性暴露可能会促进肝肿瘤的形成。由于所需的检测限低,阻碍了地表水和饮用水中环肽蓝细菌毒素的检测,并且目前的常规检测仅限于少数同类物。不寻常的β-氨基酸ADDA(4E,6E-3-氨基-9-甲氧基-2,6,8-三甲基-10-苯基癸4 大多数已知(> 80%)有毒的五肽和七肽毒素同类物中都含有6-二烯酸。在这里,我们报告了两个ADDA半抗原的合成,对ADDA的抗体的升高以及竞争性间接ELISA的发展,用于利用这些抗体检测微囊藻毒素和结节蛋白。该方法的定量限为0.02-0.07 ng / mL(取决于存在的同系物),低于WHO提出的饮用水准则(1
Microcystin analogues comprised only of adda and a single additional amino acid retain moderate activity as PP1/PP2A inhibitors
作者:Brian M Gulledge、James B Aggen、Hugo Eng、Khuloud Sweimeh、A.Richard Chamberlin
DOI:10.1016/s0960-894x(03)00588-2
日期:2003.9
A series of greatly simplified microcystin analogues comprised only of Adda (the beta-amino acid common to the microcystins, nodularins, and motuporin,) and a single additional aminoacid residue was synthesized and screened for inhibition of the protein phosphatases 1 and 2A. Several of the analogues were shown to be mid-nanomolar inhibitors of the enzymes.