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[Study on genetic polymorphism of NQO1 and susceptibility to benzene poisoning]. 2004

Yan Chen, and Zhiying Ji, and Jianning Xu, and Chunling Wu, and Guilan Li
Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing 100050, China.

OBJECTIVE To explore the relationship between genetic polymorphism of NQO1 and susceptibility to benzene poisoning (BP). METHODS The genetic polymorphism of NQO1 for 100 patients with benzene poisoning and 90 workers exposed to benzene who were engaged in the same working time and job title as patients with benzene poisoning were detected by PCR-RFLP. RESULTS There was a 2.82-fold (95% CI: 1.42-5.58 ) increased risk of BP in the subjects with NQO1 C609T mutation genotype (T/T) compared with those carrying heterozygous (C/T) and wild type (C/C), and there was a 2.94-fold (95% CI: 1.25-6.90) increased risk of BP in the subjects with NQO1 C609T mutation genotype (T/T) compared with those carrying wild type (C/C) . There was a trend that the risk of BP in subjects with NQO1 C609T mutation genotype (T/T) was higher than those carrying heterozygous (C/T) and even higher than those carrying wild type (C/C) (chi2(trend) = 6.01, P = 0.014). CONCLUSIONS The subjects with NQO1 C609T mutation genotype (T/T) were more susceptive to benzene and NQO1 is as a biomarker to assessment the risk of benzene poisoning for individual.

UI MeSH Term Description Entries
D009154 Mutation Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations. Mutations
D009784 Occupational Diseases Diseases caused by factors involved in one's employment. Diseases, Occupational,Occupational Illnesses,Disease, Occupational,Illnesse, Occupational,Illnesses, Occupational,Occupational Disease,Occupational Illnesse
D011110 Polymorphism, Genetic The regular and simultaneous occurrence in a single interbreeding population of two or more discontinuous genotypes. The concept includes differences in genotypes ranging in size from a single nucleotide site (POLYMORPHISM, SINGLE NUCLEOTIDE) to large nucleotide sequences visible at a chromosomal level. Gene Polymorphism,Genetic Polymorphism,Polymorphism (Genetics),Genetic Polymorphisms,Gene Polymorphisms,Polymorphism, Gene,Polymorphisms (Genetics),Polymorphisms, Gene,Polymorphisms, Genetic
D012150 Polymorphism, Restriction Fragment Length Variation occurring within a species in the presence or length of DNA fragment generated by a specific endonuclease at a specific site in the genome. Such variations are generated by mutations that create or abolish recognition sites for these enzymes or change the length of the fragment. RFLP,Restriction Fragment Length Polymorphism,RFLPs,Restriction Fragment Length Polymorphisms
D005838 Genotype The genetic constitution of the individual, comprising the ALLELES present at each GENETIC LOCUS. Genogroup,Genogroups,Genotypes
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001554 Benzene Toxic, volatile, flammable liquid hydrocarbon byproduct of coal distillation. It is used as an industrial solvent in paints, varnishes, lacquer thinners, gasoline, etc. Benzene causes central nervous system damage acutely and bone marrow damage chronically and is carcinogenic. It was formerly used as parasiticide. Benzol,Benzole,Cyclohexatriene
D016133 Polymerase Chain Reaction In vitro method for producing large amounts of specific DNA or RNA fragments of defined length and sequence from small amounts of short oligonucleotide flanking sequences (primers). The essential steps include thermal denaturation of the double-stranded target molecules, annealing of the primers to their complementary sequences, and extension of the annealed primers by enzymatic synthesis with DNA polymerase. The reaction is efficient, specific, and extremely sensitive. Uses for the reaction include disease diagnosis, detection of difficult-to-isolate pathogens, mutation analysis, genetic testing, DNA sequencing, and analyzing evolutionary relationships. Anchored PCR,Inverse PCR,Nested PCR,PCR,Anchored Polymerase Chain Reaction,Inverse Polymerase Chain Reaction,Nested Polymerase Chain Reaction,PCR, Anchored,PCR, Inverse,PCR, Nested,Polymerase Chain Reactions,Reaction, Polymerase Chain,Reactions, Polymerase Chain
D016660 NAD(P)H Dehydrogenase (Quinone) A flavoprotein that reversibly catalyzes the oxidation of NADH or NADPH by various quinones and oxidation-reduction dyes. The enzyme is inhibited by dicoumarol, capsaicin, and caffeine. DT Diaphorase,Menadione Reductase,Phylloquinone Reductase,Quinone Reductase,Vitamin K Reductase,Diaphorase, DT,Reductase, Menadione,Reductase, Phylloquinone,Reductase, Quinone,Reductase, Vitamin K

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