title: DMA(V) in Drinking Water Activated NF-κB Signal Pathway and Increased TGF-β and IL-1β Expressions in Bladder Epithelial Cells of Rats.
abstract: Dimethylarsinic acid (DMA(V)) is the main product of arsenic methylation metabolism in vivo and is rat bladder carcinogen and tumor promoting agent. In this study, we measured the expressions of mRNA and proteins of NF-κB pathway members, IKKα, IKKβ, p65, and p50 in rat bladder epithelium by qRT-PCR and immunohistochemical analysis after rats received drinking water containing 100 and 200 ppm DMA(V) for 10 weeks. Transforming growth factor-β (TGF-β) immunoexpression in rat bladder epithelium and urine level of IL-1β also were determined. We found that DMA(V) dramatically increased the mRNA levels of NF-κB p50 and IKKα in the bladder epithelium of rats compared to the control group. Immunohistochemical examinations showed that DMA(V) increased immunoreactivities of IKKα, IKKβ, and phospho-NF-κB p50 in the cytoplasm and phospho-NF-κB p50 and p65 in nucleus of rat urothelial cells. In addition, DMA(V) treated rats exhibited significantly increased inflammatory factor TGF-β immunoreactivity in bladder epithelium and IL-1β secretion in urine. These data suggest that DMA(V) could activate NF-κB signal pathway and increase TGF-β and IL-1β expressions in bladder epithelial cells of rats.
authors.affiliation: Department of Environmental and Occupational Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, China.
authors.forename: Siqi
authors.initials: S
authors.lastname: Cao
authors.affiliation: Department of Environmental and Occupational Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, China.
authors.forename: Shengnan
authors.initials: S
authors.lastname: Liu
authors.affiliation: Department of Environmental and Occupational Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Wang
authors.affiliation: Department of Environmental and Occupational Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, China.
authors.forename: Jieyu
authors.initials: J
authors.lastname: Liu
authors.affiliation: Department of Environmental and Occupational Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, China.
authors.forename: Mengdan
authors.initials: M
authors.lastname: Li
authors.affiliation: Department of Environmental and Occupational Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Environmental and Occupational Health, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, China.
authors.forename: Shuhua
authors.initials: S
authors.lastname: Xi
mesh_terms: D000818:Animals; D002101:Cacodylic Acid / Q000494:pharmacology*; D060766:Drinking Water / Q000737:chemistry*; D004847:Epithelial Cells / Q000187:drug effects / Q000276:immunology; D005260:Female; D007150:Immunohistochemistry; D053583:Interleukin-1beta / Q000032:analysis*; D016328:NF-kappa B / Q000502:physiology*; D051381:Rats; D017208:Rats, Wistar; D015398:Signal Transduction / Q000187:drug effects* / Q000502:physiology; D016212:Transforming Growth Factor beta / Q000032:analysis*; D001743:Urinary Bladder / Q000187:drug effects* / Q000276:immunology
chemical_list: D060766:Drinking Water; D053583:Interleukin-1beta; D016328:NF-kappa B; D016212:Transforming Growth Factor beta; D002101:Cacodylic Acid