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Abstract Title:

Euterpe oleracea Mart. seed extract protects against renal injury in diabetic and spontaneously hypertensive rats: role of inflammation and oxidative stress.

Abstract Source:

Eur J Nutr. 2017 Jan 20. Epub 2017 Jan 20. PMID: 28105508

Abstract Author(s):

Viviane da Silva Cristino Cordeiro, Graziele Freitas de Bem, Cristiane Aguiar da Costa, Izabelle Barcellos Santos, Lenize Costa Reis Marins de Carvalho, Dayane Teixeira Ognibene, Ana Paula Machado da Rocha, Jorge José de Carvalho, Roberto Soares de Moura, Angela Castro Resende

Article Affiliation:

Viviane da Silva Cristino Cordeiro

Abstract:

PURPOSE: Euterpe oleracea Mart. (açaí) seed extract (ASE), through its anti-hypertensive, antioxidant and anti-inflammatory properties, may be useful to treat or prevent human diseases. Several evidences suggest that oxidative stress and inflammation contribute to the pathogenesis of diabetic nephropathy; therefore, we tested thehypothesis that ASE (200 mg/kg(-1)day(-1)) prevents diabetes and hypertension-related oxidative stress and inflammation, attenuating renal injury.

METHODS: Male rats with streptozotocin (STZ)-induced diabetes (D), and spontaneously hypertensive rats with STZ-induced diabetes (DH) were treated daily with tap water or ASE (D + ASE and DH + ASE, respectively) for 45 days. The control (C) and hypertensive (H) animals received water.

RESULTS: The elevated serum levels of urea and creatinine in D and DH, and increased albumin excretion in HD were reduced by ASE. Total glomeruli number in D and DH, were increased by ASE that also reduced renal fibrosis in both groups by decreasing collagen IV and TGF-β1 expression. ASE improved biomarkers of renal filtration barrier (podocin and nephrin) in D and DH groups and prevented the increased expression of caspase-3, IL-6, TNF-α and MCP-1 in both groups. ASE reduced oxidative damage markers (TBARS, carbonyl levels and 8-isoprostane) in D and DH associated with a decrease in Nox 4 and p47 subunit expression and increase in antioxidant enzyme activity in both groups (SOD, catalase and GPx).

CONCLUSION: ASE substantially reduced renal injury and prevented renal dysfunction by reducing inflammation, oxidative stress and improving the renal filtration barrier, providing a nutritional resource for prevention of diabetic and hypertensive-related nephropathy.

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Sayer Ji
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