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Myeloperoxidase-mediated oxidation of organophosphorus pesticides as a pre-step in their determination by AChE based bioanalytical methods

Authorized Users Only
2010
Authors
Pasti, Tamara Lazarevic
Momic, Tatjana
Onjia, Antonije E.
Vujisić, Ljubodrag V.
Vasic, Vesna
Article (Published version)
Metadata
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Abstract
In order to improve the sensitivity of assays for inhibitors of the enzyme acetylcholine esterase (AChE), an effective method was developed for the conversion of the organophosphate pesticides (OPs) diazinon, malathion, chlorpyrifos, azinphos-methyl and phorate into more toxic inhibitors. This was accomplished by converting them from the thio form into their oxo form using the enzyme myeloperoxidase. The oxo forms, which are the only products of conversion, were determined by AChE bioassays, using either the free enzyme, or a flow injection analysis manifold with immobilized AChE and spectrophotometric detection. All modified OPs exhibited inhibitory power at ppb levels and within 10 min. The method is considered to represent an excellent means for improving the sensitivity of assays for determination of OPs.
Keywords:
Organophosphate pesticides / Myeloperoxidase / Oxidation / Bioanalytics / Acethylcholinesterase
Source:
Microchimica Acta, 2010, 170, 3-4, 289-297
Publisher:
  • Springer Wien, Wien
Funding / projects:
  • Ministry of Science and Environmental Protection of the Republic of Serbia

DOI: 10.1007/s00604-010-0324-2

ISSN: 0026-3672

WoS: 000281384000011

Scopus: 2-s2.0-77956180737
[ Google Scholar ]
12
11
URI
https://cherry.chem.bg.ac.rs/handle/123456789/1106
Collections
  • Publikacije
Institution/Community
Hemijski fakultet
TY  - JOUR
AU  - Pasti, Tamara Lazarevic
AU  - Momic, Tatjana
AU  - Onjia, Antonije E.
AU  - Vujisić, Ljubodrag V.
AU  - Vasic, Vesna
PY  - 2010
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1106
AB  - In order to improve the sensitivity of assays for inhibitors of the enzyme acetylcholine esterase (AChE), an effective method was developed for the conversion of the organophosphate pesticides (OPs) diazinon, malathion, chlorpyrifos, azinphos-methyl and phorate into more toxic inhibitors. This was accomplished by converting them from the thio form into their oxo form using the enzyme myeloperoxidase. The oxo forms, which are the only products of conversion, were determined by AChE bioassays, using either the free enzyme, or a flow injection analysis manifold with immobilized AChE and spectrophotometric detection. All modified OPs exhibited inhibitory power at ppb levels and within 10 min. The method is considered to represent an excellent means for improving the sensitivity of assays for determination of OPs.
PB  - Springer Wien, Wien
T2  - Microchimica Acta
T1  - Myeloperoxidase-mediated oxidation of organophosphorus pesticides as a pre-step in their determination by AChE based bioanalytical methods
VL  - 170
IS  - 3-4
SP  - 289
EP  - 297
DO  - 10.1007/s00604-010-0324-2
UR  - Kon_2106
ER  - 
@article{
author = "Pasti, Tamara Lazarevic and Momic, Tatjana and Onjia, Antonije E. and Vujisić, Ljubodrag V. and Vasic, Vesna",
year = "2010",
abstract = "In order to improve the sensitivity of assays for inhibitors of the enzyme acetylcholine esterase (AChE), an effective method was developed for the conversion of the organophosphate pesticides (OPs) diazinon, malathion, chlorpyrifos, azinphos-methyl and phorate into more toxic inhibitors. This was accomplished by converting them from the thio form into their oxo form using the enzyme myeloperoxidase. The oxo forms, which are the only products of conversion, were determined by AChE bioassays, using either the free enzyme, or a flow injection analysis manifold with immobilized AChE and spectrophotometric detection. All modified OPs exhibited inhibitory power at ppb levels and within 10 min. The method is considered to represent an excellent means for improving the sensitivity of assays for determination of OPs.",
publisher = "Springer Wien, Wien",
journal = "Microchimica Acta",
title = "Myeloperoxidase-mediated oxidation of organophosphorus pesticides as a pre-step in their determination by AChE based bioanalytical methods",
volume = "170",
number = "3-4",
pages = "289-297",
doi = "10.1007/s00604-010-0324-2",
url = "Kon_2106"
}
Pasti, T. L., Momic, T., Onjia, A. E., Vujisić, L. V.,& Vasic, V.. (2010). Myeloperoxidase-mediated oxidation of organophosphorus pesticides as a pre-step in their determination by AChE based bioanalytical methods. in Microchimica Acta
Springer Wien, Wien., 170(3-4), 289-297.
https://doi.org/10.1007/s00604-010-0324-2
Kon_2106
Pasti TL, Momic T, Onjia AE, Vujisić LV, Vasic V. Myeloperoxidase-mediated oxidation of organophosphorus pesticides as a pre-step in their determination by AChE based bioanalytical methods. in Microchimica Acta. 2010;170(3-4):289-297.
doi:10.1007/s00604-010-0324-2
Kon_2106 .
Pasti, Tamara Lazarevic, Momic, Tatjana, Onjia, Antonije E., Vujisić, Ljubodrag V., Vasic, Vesna, "Myeloperoxidase-mediated oxidation of organophosphorus pesticides as a pre-step in their determination by AChE based bioanalytical methods" in Microchimica Acta, 170, no. 3-4 (2010):289-297,
https://doi.org/10.1007/s00604-010-0324-2 .,
Kon_2106 .

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