PMID- 31545278 OWN - NLM STAT- MEDLINE DCOM- 20200204 LR - 20200204 IS - 1950-6007 (Electronic) IS - 0753-3322 (Linking) VI - 118 DP - 2019 Oct TI - The renal protection of flavonoid-rich ethanolic extract from silkworm green cocoon involves in inhibiting TNF-alpha-p38 MAP kinase signalling pathway in type 2 diabetic mice. PG - 109379 LID - S0753-3322(19)32835-5 [pii] LID - 10.1016/j.biopha.2019.109379 [doi] AB - BACKGROUND: Diabetic nephropathy (DN) is one of the major complications of diabetes. Sericin and flavonoids are two bioactive substances which have been demonstrated to have some therapeutical effect on diabetic nephropathy. The aim of this paper is to investigate the effect of ethanolic extract (EE) rich in quercetin and kaempferol and their glucosides from the green cocoon of silkworm Bombyx mori on DN in type 2 diabetic (T2D) mice induced by high-fat and streptozotocin (STZ). METHODS: Ethanolic extract from the green cocoon shell of silkworm Bombyx mori was used as material. Diabetic mice were orally treated with three doses (150, 250 and 350 mg/kg) of the extract for 7 weeks, then the levels of oxidases and related inflammatory factors were measured in kidneys. RESULTS: Compared with the negative control, EE administration resulted in an evident reduction in blood glucose levels and an improvement of the body weight in diabetic mice. Oral EE could inhibit the expressions of renal tumour necrosis factor TNF-alpha, monocyte chemoattractant protein-1 (MCP-1), fibronectin (FN) and P38 mitogen-activated protein kinase (p38 MAPK) in T2D mice. Moreover, the levels of superoxide dismutase (SOD) and glutathione peroxidase (GSH-px) were significantly elevated in T2D mice treated with EE. CONCLUSIONS: The activities of anti-fibrosis and anti-inflammation contributed to the renal protective effects by reducing oxidative stress, which might be mediated by the inhibition of the TNF-alpha-p38 MAP kinase signalling pathway. It is suggested that the ethanolic extract from silkworm green cocoon might be potential as an herbal medicine for DN. CI - Copyright (c) 2019 The Authors. Published by Elsevier Masson SAS.. All rights reserved. FAU - Wang, Hai-Yan AU - Wang HY AD - Silk Biotechnology Laboratory, School of Biology and Basic Medical Sciences, Soochow University, China. FAU - Zhao, Jin-Ge AU - Zhao JG AD - Silk Biotechnology Laboratory, School of Biology and Basic Medical Sciences, Soochow University, China. FAU - Wei, Zheng-Guo AU - Wei ZG AD - Silk Biotechnology Laboratory, School of Biology and Basic Medical Sciences, Soochow University, China. Electronic address: szwei2002@126.com. FAU - Zhang, Yu-Qing AU - Zhang YQ AD - Silk Biotechnology Laboratory, School of Biology and Basic Medical Sciences, Soochow University, China. Electronic address: sericult@suda.edu.cn. LA - eng PT - Journal Article DEP - 20190828 PL - France TA - Biomed Pharmacother JT - Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie JID - 8213295 RN - 0 (Antioxidants) RN - 0 (Blood Glucose) RN - 0 (Fibronectins) RN - 0 (Flavonoids) RN - 0 (Inflammation Mediators) RN - 0 (Plant Extracts) RN - 0 (Protective Agents) RN - 0 (Tumor Necrosis Factor-alpha) RN - 3K9958V90M (Ethanol) SB - IM MH - Administration, Oral MH - Animals MH - Antioxidants/metabolism MH - Blood Glucose/metabolism MH - Body Weight/drug effects MH - Bombyx MH - Diabetes Mellitus, Experimental/blood/*drug therapy/enzymology MH - Diabetes Mellitus, Type 2/blood/*drug therapy/enzymology MH - Ethanol/chemistry MH - Fasting/blood MH - Fibronectins/metabolism MH - Flavonoids/chemistry/pharmacology/*therapeutic use MH - Inflammation Mediators/metabolism MH - Kidney/drug effects/*pathology MH - MAP Kinase Signaling System/*drug effects MH - Male MH - Mice, Inbred ICR MH - Plant Extracts/administration & dosage/pharmacology/*therapeutic use MH - Protective Agents/administration & dosage/pharmacology/*therapeutic use MH - Tumor Necrosis Factor-alpha/*metabolism OTO - NOTNLM OT - Antioxidase OT - Diabetic nephropathy OT - Ethanolic extract OT - Sericin EDAT- 2019/09/24 06:00 MHDA- 2020/02/06 06:00 CRDT- 2019/09/24 06:00 PHST- 2019/06/13 00:00 [received] PHST- 2019/08/16 00:00 [revised] PHST- 2019/08/22 00:00 [accepted] PHST- 2019/09/24 06:00 [entrez] PHST- 2019/09/24 06:00 [pubmed] PHST- 2020/02/06 06:00 [medline] AID - S0753-3322(19)32835-5 [pii] AID - 10.1016/j.biopha.2019.109379 [doi] PST - ppublish SO - Biomed Pharmacother. 2019 Oct;118:109379. doi: 10.1016/j.biopha.2019.109379. Epub 2019 Aug 28.