title: Epigallocatechin-3-gallate attenuates cadmium-induced chronic renal injury and fibrosis.
abstract: Cadmium (Cd) pollution is a serious environmental problem. Kidney is a main target organ of Cd toxicity. This study was undertaken to investigate the potential protective effects of epigallocatechin-3-gallate (EGCG) against chronic renal injury and fibrosis induced by CdCl2. Rat model was induced by exposing to 250 mg/L CdCl2 through drinking water. The renal function was evaluated by detecting the levels of blood urea nitrogen (BUN) and serum creatinine (SCR). The oxidative stress was measured by detecting the levels of malondialdehyde (MDA), nitric oxide (NO), reduced glutathione/oxidized glutathione (GSH/GSSG) and renal enzymatic antioxidant status. Additionally, the renal levels of transforming growth factor-β1 (TGF-β1), Smad3, phosphorylation-Smad3 (pp-Smad3), α-smooth muscle actin (α-SMA), vimentin and E-cadherin were measured by western blot assay. Renal levels of microRNA-21 (miR-21), miR-29a/b/c and miR-192 were measured by quantitative RT-PCR. It was found that EGCG ameliorated the CdCl2-induced renal injury, inhibited the level of oxidative stress, normalized renal enzymatic antioxidant status and E-cadherin level, as well as attenuated the over generation of TGF-β1, pp-Smad3, vimentin and α-SMA. EGCG also decreased the production of miR-21 and miR-192, and enhanced the levels of miR-29a/b/c. These results showed that EGCG could attenuate Cd induced chronic renal injury.
authors.affiliation: Department of Pharmacy, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
authors.forename: Jinglou
authors.initials: J
authors.lastname: Chen
authors.affiliation: Department of Pharmacy, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
authors.forename: Lifen
authors.initials: L
authors.lastname: Du
authors.affiliation: Department of Pharmacy, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Pharmacy, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. Electronic address: jinglouchen@126.com.
authors.forename: Hongping
authors.initials: H
authors.lastname: Song
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D015153:Blotting, Western; D002104:Cadmium / Q000633:toxicity*; D002392:Catechin / Q000031:analogs & derivatives* / Q000494:pharmacology; D005355:Fibrosis / Q000139:chemically induced / Q000473:pathology / Q000517:prevention & control*; D007124:Immunoenzyme Techniques; D008297:Male; D018384:Oxidative Stress / Q000187:drug effects; D051381:Rats; D017208:Rats, Wistar; D051436:Renal Insufficiency, Chronic / Q000139:chemically induced / Q000473:pathology / Q000517:prevention & control*
chemical_list: D000975:Antioxidants; D002104:Cadmium; D002392:Catechin; C045651:epigallocatechin gallate
keywords: Cadmium; Epigallocatechin-3-gallate; Oxidative stress; Renal injury; Transforming growth factor-β1