Development of high-throughput screening assays for profiling snake venom phospholipase A2 activity after chromatographic fractionation

被引:10
|
作者
Still, Kristina B. M. [1 ,2 ]
Slagboom, Julien [1 ,2 ]
Kidwai, Sarah [1 ]
Xie, Chunfang [1 ,2 ]
Zhao, Yumei [3 ]
Eisses, Bastiaan [1 ]
Jiang, Zhengjin [3 ]
Vonk, Freek J. [1 ,4 ]
Somsen, Govert W. [1 ,2 ]
Casewell, Nicholas R. [5 ,6 ]
Kool, Jeroen [1 ,2 ]
机构
[1] Vrije Univ Amsterdam, Amsterdam Inst Mol & Life Sci, Div BioAnalyt Chem, De Boelelaan 1085, NL-1081 HV Amsterdam, Netherlands
[2] Ctr Analyt Sci Amsterdam CASA, Amsterdam, Netherlands
[3] Jinan Univ, Coll Pharm, Inst Pharmaceut Anal, Huangpu Ave West 601, Guangzhou 601, Peoples R China
[4] Nat Biodivers Ctr, Leiden, Netherlands
[5] Univ Liverpool Liverpool Sch Trop Med, Ctr Snakebite Res & Intervent, Pembroke Pl, Liverpool L3 5QA, Merseyside, England
[6] Univ Liverpool Liverpool Sch Trop Med, Ctr Drugs & Diagnost, Liverpool L3 5QA, Merseyside, England
基金
英国惠康基金;
关键词
GEOGRAPHIC VARIATIONS; COLORIMETRIC ASSAY; PHOSPHATIDYLCHOLINE; INHIBITION; ENZYMES;
D O I
10.1016/j.toxicon.2020.05.022
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
Many organisms, ranging from plants to mammals, contain phospholipase A(2) enzymes (PLA(2)s), which catalyze the production of lysophospholipids and fatty acid proinflammatory mediators. PLA(2)s are also common constituents of animal venoms, including bees, scorpions and snakes, and they cause a wide variety of toxic effects including neum-, myo-, cyto-, and cardio-toxicity, anticoagulation and edema. The aim of this study was to develop a generic method for profiling enzymatically active PLA(2)s in snake venoms after chromatographic separation. For this, low-volume high-throughput assays for assessment of enzymatic PLA(2) activity were evaluated and optimized. Subsequently, the assays were incorporated into a nanofractionation platform that combines high-resolution fractionation of crude venoms by liquid chromatography (LC) with bioassaying in 384-well plate format, and parallel mass spectrometric (MS) detection for toxin identification. The miniaturized assays developed are based on absorbance or fluorescence detection (respectively, using cresol red or fluorescein as pH indicators) to monitor the pH drop associated with free fatty acid formation by enzymatically active PLA(2)s. The methodology was demonstrated for assessment of PLA(2) activity profiles of venoms from the snake species Bothrops asper, Echis carinatus, Echis coloratus, Echis ocellatus, Oxyuranus scutellatus and Daboia russelii russelii.
引用
收藏
页码:28 / 38
页数:11
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