浙江农业学报 ›› 2026, Vol. 38 ›› Issue (5): 845-856.DOI: 10.3969/j.issn.1004-1524.20250344

• 动物科学 • 上一篇    下一篇

纯化米糠对D-半乳糖诱导的亚急性衰老小鼠抗氧化能力和肠道菌群的影响

覃海桑1,2(), 李建强2, 刘钊君2, 吴宇航2, 顾杰3, 张戈3, 姜元荣3, 李进军2, 王欣2, 匡建2, 边祥雨2, 史芳舒2, 陈荫1, 闻正顺1,4,*(), 李小琼2,*()   

  1. 1 浙江海洋大学 食品与药学学院, 浙江 舟山 316022
    2 浙江省农业科学院 食品科学研究所, 农产品质量安全全国重点实验室, 浙江 杭州 310021
    3 丰益(上海)生物技术研发中心有限公司, 上海 200137
    4 湘湖实验室, 浙江 杭州 311231

Effects of purified rice bran on antioxidant capacity and gut microbiota in D-galactose-induced subacute aging mice

QIN Haisang1,2(), LI Jianqiang2, LIU Zhaojun2, WU Yuhang2, GU Jie3, ZHANG Ge3, JIANG Yuanrong3, LI Jinjun2, WANG Xin2, KUANG Jian2, BIAN Xiangyu2, SHI Fangshu2, CHEN Yin1, WEN Zhengshun1,4,*(), LI Xiaoqiong2,*()   

  1. 1 Food and Pharmacy College, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China
    2 State Key Laboratory for Quality and Safety of Agro-Products, Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
    3 Wilmar (Shanghai) Biotechnology Research & Development Center Co., Ltd., Shanghai 200137, China
    4 Xianghu Laboratory, Hangzhou 311231, China
  • Received:2025-04-28 Published:2026-05-25 Online:2026-06-02

摘要:

米糠是粮食加工过程中的副产物,富含膳食纤维,具有良好的营养与功能价值。本研究采用α-淀粉酶对米糠进行酶解,制备纯化米糠(PRB),并探讨其对D-半乳糖(D-gal)诱导的亚急性衰老小鼠行为能力、抗氧化水平及肠道菌群组成的调节作用。结果显示,D-gal处理显著(p<0.05)损害小鼠的运动与认知功能,而PRB干预能有效缓解该损伤,且呈剂量依赖性反应,高剂量组效果最为显著。抗氧化指标方面,PRB可显著提高小鼠体内超氧化物歧化酶(SOD)活性与谷胱甘肽(GSH)含量,降低丙二醛(MDA)含量,从而缓解氧化应激反应。肠道菌群分析结果表明,PRB可通过调节微生物多样性,抑制有害菌如脱硫弧菌属(Desulfovibrio)的相对丰度,促进有益菌如双歧杆菌属(Bifidobacterium)、理研菌属(Rikenella)的增殖,从而改善肠道菌群失衡。同时,PRB显著促进短链脂肪酸(SCFA,主要包括乙酸、丙酸、丁酸和戊酸)的生成,有助于调节肠道pH值,维持肠道环境稳态。PRB通过多维度机制协同改善衰老相关氧化损伤与肠道菌群紊乱,促进机体健康。

关键词: 纯化米糠, 衰老, 肠道菌群, 短链脂肪酸, 抗氧化

Abstract:

Rice bran, a by-product of grain processing, is rich in dietary fiber and possesses valuable nutritional and functional properties. This study aimed to evaluate the physiological effects of purified rice bran (PRB), produced via α-amylase hydrolysis, on behavioral function, antioxidant capacity, and gut microbiota composition in a murine model of subacute aging induced by D-galactose (D-gal). The results showed that D-gal treatment significantly (p<0.05) impaired locomotor and cognitive functions. In contrast, PRB supplementation effectively alleviated these deficits dose-dependently, with the high-dose group showing the most pronounced improvement. In terms of antioxidant capacity, PRB significantly increased the superoxide dismutase (SOD) activity and glutathione (GSH) content, yet reduced malondialdehyde (MDA) content, thereby alleviating oxidative stress. Gut microbiota analysis revealed that PRB regulated microbial diversity, suppressed harmful bacteria such as Desulfovibrio, and promoted the growth of beneficial genera such as Bifidobacterium, Rikenella, promoting microbial homeostasis. Moreover, PRB significantly enhanced the production of short-chain fatty acid (SCFA), including acetic, propionic, butyric, and valeric acids, contributing to intestinal pH value regulation and homeostasis. Overall, PRB exerted synergistic effects on oxidative stress and gut dysbiosis in aging mice, suggesting its potential to promote gut health and overall well-being.

Key words: purified rice bran, aging, gut microbiota, short-chain fatty acid, antioxidation

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