title: Interindividual difference in expression of human Ah receptor and related P450 genes.
abstract: The genomic clones of human aryl hydrocarbon receptor (Ahr) and Ahr nuclear translocator (Arnt) were isolated, and the structures of exon-intron junctions of these genes were partially determined. Based on the sequence information, a quantitative RT-PCR analysis was developed, and the expression of these genes was studied in various human tissues. mRNAs for Ahr and Arnt were widely expressed in human tissues and abundantly in lung. Individual difference in expression levels of Ahr and Arnt mRNA was observed in liver, lung and blood. In order to examine whether expression levels of Ahr and Arnt were associated with those of CYP1A1, we studied the expression of these mRNAs in blood among 20 healthy subjects, taking account of individuals' cigarette smoking habits. We found that the expression levels of CYP1A1 appeared to associate with those of Ahr and Arnt mRNAs (P < 0.06), and also that the expression of Ahr and Arnt was influenced by cigarette smoking. The expression of human Ahr and Arnt is reported here for the first time, providing a quantitative RT-PCR analysis as a useful tool for further studies.
authors.affiliation: Department of Biochemistry, Saitama Cancer Center Research Institute, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Hayashi
authors.forename: J
authors.initials: J
authors.lastname: Watanabe
authors.forename: K
authors.initials: K
authors.lastname: Nakachi
authors.forename: H
authors.initials: H
authors.lastname: Eguchi
authors.forename: O
authors.initials: O
authors.lastname: Gotoh
authors.forename: K
authors.initials: K
authors.lastname: Kawajiri
mesh_terms: D000328:Adult; D000368:Aged; D051784:Aryl Hydrocarbon Receptor Nuclear Translocator; D001483:Base Sequence; D003577:Cytochrome P-450 Enzyme System / Q000097:blood / Q000235:genetics*; D004268:DNA-Binding Proteins; D005260:Female; D015870:Gene Expression; D006801:Humans; D007206:Individuality; D008099:Liver / Q000502:physiology; D008168:Lung / Q000502:physiology; D008875:Middle Aged; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction / Q000379:methods; D011506:Proteins / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics; D012194:RNA-Directed DNA Polymerase / Q000378:metabolism; D018336:Receptors, Aryl Hydrocarbon / Q000235:genetics* / Q000378:metabolism; D012907:Smoking / Q000009:adverse effects; D014157:Transcription Factors
chemical_list: C497396:ARNT protein, human; D004268:DNA-Binding Proteins; D011506:Proteins; D012333:RNA, Messenger; D018336:Receptors, Aryl Hydrocarbon; D014157:Transcription Factors; D051784:Aryl Hydrocarbon Receptor Nuclear Translocator; D003577:Cytochrome P-450 Enzyme System; D012194:RNA-Directed DNA Polymerase