Oxidized-low density lipoprotein level among Organophosphates (OPs) pesticide exposed workers

Organophosphate (OP) is one of the widely used pesticides worldwide. It has been shown to induce oxidative stress in both animal and human. Oxidative stress may stimulate the oxidation of lipoprotein particularly the low density-lipoprotein (LDL) which is known to promote atherogenesis. PON1 is high...

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Main Authors:	Abdullah, Nor Zamzila, Ishaka, Aminu, Samsuddin, Niza, Mohd Rus, Razman
Format:	Article
Language:	English
Published:	College of Pathologists, Academy of Medicine Malaysia 2010
Subjects:	RA0421 Public health. Hygiene. Preventive Medicine RB Pathology
Online Access:	http://irep.iium.edu.my/13593/ http://irep.iium.edu.my/13593/ http://irep.iium.edu.my/13593/1/Malaysian_Journal_of_Pathology_2010.pdf

id	iium-13593
recordtype	eprints
spelling	iium-135932012-01-10T07:27:22Z http://irep.iium.edu.my/13593/ Oxidized-low density lipoprotein level among Organophosphates (OPs) pesticide exposed workers Abdullah, Nor Zamzila Ishaka, Aminu Samsuddin, Niza Mohd Rus, Razman RA0421 Public health. Hygiene. Preventive Medicine RB Pathology Organophosphate (OP) is one of the widely used pesticides worldwide. It has been shown to induce oxidative stress in both animal and human. Oxidative stress may stimulate the oxidation of lipoprotein particularly the low density-lipoprotein (LDL) which is known to promote atherogenesis. PON1 is high density-lipoprotein (HDL) related enzyme which is recognized for its function to hydrolyze OPs into a relatively less toxic substance and prevent atherosclerosis by hydrolyzing oxidized-LDL (ox-LDL). Low PON1 activities were reported in OPs exposed individuals, while in different studies it was associated with a higher risk of coronary artery disease (CAD). However, a link between chronic OP exposure, PON1 activity and ox-LDL which is known for its contribution in the development of atherosclerosis has not yet been reported. The aim of this report was to compare the level of PON 1 activities and ox-LDL between workers who are exposed to OPs and the comparative non-exposed group. Methods: A cross sectional study was carried among 51 selected pesticides sprayers from 4 farms in Kuantan who fulfilled the criteria while 48 control subjects were selected based on matching process of age, ethnicity and income bracket. Serum samples were analyzed for ox-LDL by ELISA method while PON1 activities were determined spectrophotometrically after the hydrolysis of substrates paraoxon, phenylacetate and diazoxon. Results: A significantly lower diazoxonase activity and higher ox-LDL level (p<0.001) was observed among the OP exposed group. The PON1 to ox-LDL ratio which probably reflect the ability of PON1 to hydrolyze ox-LDL were also significantly lower (p<0.05) among the OPs exposed group. Conclusion: Our data demonstrated that the increased ox-LDL may result from the reduced serum antioxidant capacity of PON1 in OPs exposed individuals. This may contribute to the development of atherosclerosis. A larger scale study is required to confirm our observation. College of Pathologists, Academy of Medicine Malaysia 2010-12 Article PeerReviewed application/pdf en http://irep.iium.edu.my/13593/1/Malaysian_Journal_of_Pathology_2010.pdf Abdullah, Nor Zamzila and Ishaka, Aminu and Samsuddin, Niza and Mohd Rus, Razman (2010) Oxidized-low density lipoprotein level among Organophosphates (OPs) pesticide exposed workers. The Malaysian Journal of Pathology, 32 (2). pp. 152-153. ISSN 0126-8635 http://www.mjpath.org.my/2010.2/index.html
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	RA0421 Public health. Hygiene. Preventive Medicine RB Pathology
spellingShingle	RA0421 Public health. Hygiene. Preventive Medicine RB Pathology Abdullah, Nor Zamzila Ishaka, Aminu Samsuddin, Niza Mohd Rus, Razman Oxidized-low density lipoprotein level among Organophosphates (OPs) pesticide exposed workers
description	Organophosphate (OP) is one of the widely used pesticides worldwide. It has been shown to induce oxidative stress in both animal and human. Oxidative stress may stimulate the oxidation of lipoprotein particularly the low density-lipoprotein (LDL) which is known to promote atherogenesis. PON1 is high density-lipoprotein (HDL) related enzyme which is recognized for its function to hydrolyze OPs into a relatively less toxic substance and prevent atherosclerosis by hydrolyzing oxidized-LDL (ox-LDL). Low PON1 activities were reported in OPs exposed individuals, while in different studies it was associated with a higher risk of coronary artery disease (CAD). However, a link between chronic OP exposure, PON1 activity and ox-LDL which is known for its contribution in the development of atherosclerosis has not yet been reported. The aim of this report was to compare the level of PON 1 activities and ox-LDL between workers who are exposed to OPs and the comparative non-exposed group. Methods: A cross sectional study was carried among 51 selected pesticides sprayers from 4 farms in Kuantan who fulfilled the criteria while 48 control subjects were selected based on matching process of age, ethnicity and income bracket. Serum samples were analyzed for ox-LDL by ELISA method while PON1 activities were determined spectrophotometrically after the hydrolysis of substrates paraoxon, phenylacetate and diazoxon. Results: A significantly lower diazoxonase activity and higher ox-LDL level (p<0.001) was observed among the OP exposed group. The PON1 to ox-LDL ratio which probably reflect the ability of PON1 to hydrolyze ox-LDL were also significantly lower (p<0.05) among the OPs exposed group. Conclusion: Our data demonstrated that the increased ox-LDL may result from the reduced serum antioxidant capacity of PON1 in OPs exposed individuals. This may contribute to the development of atherosclerosis. A larger scale study is required to confirm our observation.
format	Article
author	Abdullah, Nor Zamzila Ishaka, Aminu Samsuddin, Niza Mohd Rus, Razman
author_facet	Abdullah, Nor Zamzila Ishaka, Aminu Samsuddin, Niza Mohd Rus, Razman
author_sort	Abdullah, Nor Zamzila
title	Oxidized-low density lipoprotein level among Organophosphates (OPs) pesticide exposed workers
title_short	Oxidized-low density lipoprotein level among Organophosphates (OPs) pesticide exposed workers
title_full	Oxidized-low density lipoprotein level among Organophosphates (OPs) pesticide exposed workers
title_fullStr	Oxidized-low density lipoprotein level among Organophosphates (OPs) pesticide exposed workers
title_full_unstemmed	Oxidized-low density lipoprotein level among Organophosphates (OPs) pesticide exposed workers
title_sort	oxidized-low density lipoprotein level among organophosphates (ops) pesticide exposed workers
publisher	College of Pathologists, Academy of Medicine Malaysia
publishDate	2010
url	http://irep.iium.edu.my/13593/ http://irep.iium.edu.my/13593/ http://irep.iium.edu.my/13593/1/Malaysian_Journal_of_Pathology_2010.pdf
first_indexed	2023-09-18T20:22:44Z
last_indexed	2023-09-18T20:22:44Z
_version_	1777408215290478592

Oxidized-low density lipoprotein level among Organophosphates (OPs) pesticide exposed workers

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