Development and applications of solid-phase extraction and liquid chromatography-mass spectrometry methods for quantification of microcystins in urine, plasma, and serum

被引:29
|
作者
Palagama, Dilrukshika S. W. [1 ]
Baliu-Rodriguez, David [1 ]
Lad, Apurva [2 ]
Levison, Bruce S. [3 ]
Kennedy, David J. [2 ]
Hailer, Steven T. [2 ]
Westrick, Judy [4 ]
Hensley, Kenneth [5 ]
Isailovic, Dragan [1 ]
机构
[1] Univ Toledo, Coll Nat Sci & Math, Dept Chem & Biochem, Toledo, OH 43606 USA
[2] Univ Toledo, Med Ctr, Dept Med, Hlth Sci Campus, Toledo, OH 43614 USA
[3] Univ Toledo, Med Ctr, Dept Physiol & Pharmacol, Hlth Sci Campus, Toledo, OH 43614 USA
[4] Wayne State Univ, Coll Liberal Arts & Sci, Dept Chem, Detroit, MI 48202 USA
[5] Arkansas Coll Osteopath Med, Dept Biochem Cellular & Mol Biol, Ft Smith, AR 72916 USA
关键词
Solid-phase extraction; Biofluids; Microcystins; Quantification; LC-MS; MS/MS; BLUE-GREEN-ALGA; CYANOBACTERIAL TOXINS; BIOLOGICAL EVIDENCE; EXPOSURE; WATER; LR; EXCRETION; TOXICITY; LIVER; PEPTIDE;
D O I
10.1016/j.chroma.2018.08.023
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
The protocols for solid-phase extraction (SPE) of six microcystins (MCs; MC-LR, MC-RR, MC-LA, MC-LF, MC-LW, and MC-YR) from mouse urine, mouse plasma, and human serum are reported. The quantification of those MCs in biofluids was achieved using HPLC-orbitrap-MS in selected-ion monitoring (SIM) mode, and MCs in urine samples were also quantified by ultra-HPLC-triple quadrupole-tandem mass spectrometry (UHPLC-QqQ-MS/MS) in multiple reaction monitoring (MRM) mode. Under optimal conditions, the extraction recoveries of MCs from samples spiked at two different concentrations (1 mu g/L and 10 mu g/L) ranged from 90.4% to 104.3% with relative standard deviations (RSDs) <= 4.7% for mouse urine, 90.4-106.9% with RSDs <= 6.3% for mouse plasma, and 90.0-104.8% with RSDs <= 5.0% for human serum. Matrix-matched internal standard calibration curves were linear with R-2 >= 0.9950 for MC-LR, MC-RR and MC-YR, and R-2 >= 0.9883 for MC-LA, MC-LF, and MC-LW. The limits of quantification (LOQs) in spiked urine samples were similar to 0.13 mu g/L for MC-LR, MC-RR, and MC-YR, and similar to 0.50 mu g/L for MC-LA, MC-LF, and MC-LW, while the LOQs in spiked plasma and serum were similar to 0.25 mu g/L for MC-LR, MC-RR, and MC-YR, and similar to 1.00 mu g/L for MC-LA, MC-LF, and MC-LW. The developed methods were applied in a proof-of-concept study to quantify urinary and blood concentrations of MC-LR after oral administration to mice. The urine of mice administered 50 mu g of MC-LR per kg bodyweight contained on average 1.30 mu g/L of MC-LR (n = 8), while mice administered 100 mu g of MC-LR per kg bodyweight had average MC-LR concentration of 2.82 mu g/L (n = 8). MC-LR was also quantified in the plasma of the same mice. The results showed that increased MC-LR dosage led to larger urinary and plasma MC-LR concentrations and the developed methods were effective for the quantification of MCs in mouse biofluids. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码:66 / 77
页数:12
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