The Impact of Chitooligosaccharides with a Certain Degree of Polymerization on Diabetic Nephropathic Mice and High Glucose-damaged HK-2 Cells

Overview

Journal Food Sci Nutr

Specialty Biotechnology

Date 2024 Jun 14

PMID 38873468

Authors

Yuwen Liu

Ran Zhang

Jiaqi Zou

Hao Yin

Mengyao Zhao

Liming Zhao

Affiliations

Soon will be listed here.

Abstract

Diabetic nephropathy (DN) is a primary diabetic complication ascribed to the pathological changes in renal microvessels. This study investigated the nuclear factor erythroid 2-related factor 2 (Nrf2)/Kelch ECH associating protein (Keap1)/antioxidant response element (ARE) signaling pathway impact of chitooligosaccharides (COS) with a certain degree of polymerization (DP) on DN mouse models and high glucose-damaged human kidney 2 (HK-2) cells. The findings indicated that COS effectively reduced the renal function indexes (uric acid [UA], urinary albumin excretion rate [UAER], urine albumin-to-creatinine ratio [UACR], blood urea nitrogen [BUN], and creatinine [Cre]) of DN mice. It increased ( < .05) the superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) antioxidant enzyme activity in the serum and kidneys, and decreased ( < .05) the malondialdehyde (MDA) content. The mechanistic investigation showed that COS significantly increased ( < .05) and downstream target gene (, , , and ) expression, and substantially decreased ( < .05) expression. The protein level was consistent with the messenger RNA (mRNA) level in in vitro and in vivo models. The docking data indicated that COS and Keap1 protein binding included six hydrogen bond formation processes (Gly364, Arg415, Arg483, His436, Ser431, and Arg380). The COS intervention mechanism may be related to the Nrf2/Keap1/ARE antioxidant pathway. Therefore, it provides a scientific basis for COS application in developing special medical food for DN patients.

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