Effects of Genotyping and Phenotyping of Cytochrome P4502E1 and Glutathione-S-transferase on the Biological Monitoring of Workers with Occupational Exposure to N,N-dimethylformamide

碩士 === 長榮大學 === 職業安全與衛生研究所 === 95 === The merabolism of N,N-dimethylformamide (DMF) in a human body involves cytochrome P450 2E1 (CYP2E1) and glutathione-S-transferase (GST). It has been known that these two enzymes own different kinds of genetic polymorphisms. The different genetic polymorphisms...

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Main Authors: Yu-Ching Chiu, 邱幼青
Other Authors: Jyun-De Wu
Format: Others
Language:zh-TW
Published: 2007
Online Access:http://ndltd.ncl.edu.tw/handle/32446917166457896334
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spelling ndltd-TW-095CJU055900132016-04-29T04:20:00Z http://ndltd.ncl.edu.tw/handle/32446917166457896334 Effects of Genotyping and Phenotyping of Cytochrome P4502E1 and Glutathione-S-transferase on the Biological Monitoring of Workers with Occupational Exposure to N,N-dimethylformamide 細胞色素P4502E1與麩胱甘硫轉移酵素基因多型性及活性表現對二甲基甲醯胺職業暴露勞工生物偵測之影響 Yu-Ching Chiu 邱幼青 碩士 長榮大學 職業安全與衛生研究所 95 The merabolism of N,N-dimethylformamide (DMF) in a human body involves cytochrome P450 2E1 (CYP2E1) and glutathione-S-transferase (GST). It has been known that these two enzymes own different kinds of genetic polymorphisms. The different genetic polymorphisms of the enzymes make the expressions of the enzyme activities for the metabolism of DMF and the health effects cause by DMF in humans become very different. The objectives of this study are: (1) to investigate the effects of genetic polymorphisms of CYP2E1 and GST on three urinary biomarkers, i.e., N-methylformamide (NMF), DMF and N-acetyl-S-(N-methylcarbamoyl)cysteine (AMCC), of DMF exposure; (2) to compare the difference of liver function between workers with and without DMF exposure and to explore the association between genetic polymorphisms and activity expressions of the DMF metabolic enzymes. One hundred and six workers (including 49 workers with DMF exposure and 57 workers without DMF exposure) were recruited in this study. For the workers with DMF exposure, personal full-shift airborne exposure, urine and blood samples were collected. For the workers without DMF exposure, urine and blood samples were collected. Passive samples (3M 3500) were used to measure the personal DMF airborne exposure. The collection of urine samples for the DMF exposed workers was conducted during work shift and in 24 hours after the end of the work shift. The samples of airborne exposure were analyzed by GC/FID (HP-5890). The amounts of DMF and NMF in the urine samples were measured by GC/NPD (Varian 3600). The amount of AMCC in the urine samples were measured by HPLC (HITACHI L-7420). The genetic polymorphisms of CYP2E1 (Pst1 and Dra1), and GST (T1 and M1) were determined by polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) from the peripheral lymphocytes. We found the average concentrations of DMF in air, DMF, NMF, and AMCC in urine were 7.59 ppm, 0.76, 9.36, and 15.29 mg/L, respectively. No any biomarkers in urine present associations with the CYP2E1 variants. Urinary AMCC, however, revealed a significant association with the variants of both GSTT1 and GSTM1 given adjusted by DMF concentrations in air. We suggested using urinary AMCC as a biomarker of DMF exposure should take into account of GST variants to avoid the erroneous exposure estimate. Jyun-De Wu 吳俊德 2007 學位論文 ; thesis 59 zh-TW
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description 碩士 === 長榮大學 === 職業安全與衛生研究所 === 95 === The merabolism of N,N-dimethylformamide (DMF) in a human body involves cytochrome P450 2E1 (CYP2E1) and glutathione-S-transferase (GST). It has been known that these two enzymes own different kinds of genetic polymorphisms. The different genetic polymorphisms of the enzymes make the expressions of the enzyme activities for the metabolism of DMF and the health effects cause by DMF in humans become very different. The objectives of this study are: (1) to investigate the effects of genetic polymorphisms of CYP2E1 and GST on three urinary biomarkers, i.e., N-methylformamide (NMF), DMF and N-acetyl-S-(N-methylcarbamoyl)cysteine (AMCC), of DMF exposure; (2) to compare the difference of liver function between workers with and without DMF exposure and to explore the association between genetic polymorphisms and activity expressions of the DMF metabolic enzymes. One hundred and six workers (including 49 workers with DMF exposure and 57 workers without DMF exposure) were recruited in this study. For the workers with DMF exposure, personal full-shift airborne exposure, urine and blood samples were collected. For the workers without DMF exposure, urine and blood samples were collected. Passive samples (3M 3500) were used to measure the personal DMF airborne exposure. The collection of urine samples for the DMF exposed workers was conducted during work shift and in 24 hours after the end of the work shift. The samples of airborne exposure were analyzed by GC/FID (HP-5890). The amounts of DMF and NMF in the urine samples were measured by GC/NPD (Varian 3600). The amount of AMCC in the urine samples were measured by HPLC (HITACHI L-7420). The genetic polymorphisms of CYP2E1 (Pst1 and Dra1), and GST (T1 and M1) were determined by polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) from the peripheral lymphocytes. We found the average concentrations of DMF in air, DMF, NMF, and AMCC in urine were 7.59 ppm, 0.76, 9.36, and 15.29 mg/L, respectively. No any biomarkers in urine present associations with the CYP2E1 variants. Urinary AMCC, however, revealed a significant association with the variants of both GSTT1 and GSTM1 given adjusted by DMF concentrations in air. We suggested using urinary AMCC as a biomarker of DMF exposure should take into account of GST variants to avoid the erroneous exposure estimate.
author2 Jyun-De Wu
author_facet Jyun-De Wu
Yu-Ching Chiu
邱幼青
author Yu-Ching Chiu
邱幼青
spellingShingle Yu-Ching Chiu
邱幼青
Effects of Genotyping and Phenotyping of Cytochrome P4502E1 and Glutathione-S-transferase on the Biological Monitoring of Workers with Occupational Exposure to N,N-dimethylformamide
author_sort Yu-Ching Chiu
title Effects of Genotyping and Phenotyping of Cytochrome P4502E1 and Glutathione-S-transferase on the Biological Monitoring of Workers with Occupational Exposure to N,N-dimethylformamide
title_short Effects of Genotyping and Phenotyping of Cytochrome P4502E1 and Glutathione-S-transferase on the Biological Monitoring of Workers with Occupational Exposure to N,N-dimethylformamide
title_full Effects of Genotyping and Phenotyping of Cytochrome P4502E1 and Glutathione-S-transferase on the Biological Monitoring of Workers with Occupational Exposure to N,N-dimethylformamide
title_fullStr Effects of Genotyping and Phenotyping of Cytochrome P4502E1 and Glutathione-S-transferase on the Biological Monitoring of Workers with Occupational Exposure to N,N-dimethylformamide
title_full_unstemmed Effects of Genotyping and Phenotyping of Cytochrome P4502E1 and Glutathione-S-transferase on the Biological Monitoring of Workers with Occupational Exposure to N,N-dimethylformamide
title_sort effects of genotyping and phenotyping of cytochrome p4502e1 and glutathione-s-transferase on the biological monitoring of workers with occupational exposure to n,n-dimethylformamide
publishDate 2007
url http://ndltd.ncl.edu.tw/handle/32446917166457896334
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