Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University, Yangling, Shaan Xi, China.
Department of Food Science, Cornell University, Ithaca, NY, 14853, United States.
Redox Biol. 2020 May;32:101535. doi: 10.1016/j.redox.2020.101535. Epub 2020 Apr 10.
Intermittent fasting (IF) has been reported to have beneficial effects on improving gut function via lowering gut inflammation and altering the gut microbiome diversity. In this study, we aimed to investigate the differential effects of three different common IF treatments, alternate day fasting (ADF), time-restricted fasting (TRF), and intermittent energy restriction (IER), on a dextran sodium sulfate (DSS)-induced colitis mouse model. The results indicated that TRF and IER, but not ADF improved the survival rates of the colitis mice. TRF and IER, but not ADF, reversed the colitis pathological development by improving the gut barrier integrity and colon length. Importantly, TRF and IER suppressed the inflammatory responses and oxidative stress in colon tissues. Interestingly, TRF and IER also attenuated colitis-related anxiety-like and obsessive-compulsive disorder behavior and alleviated the neuroinflammation and oxidative stress. TRF and IER also altered the gut microbiota composition, including the decrease of the enrichments of colitis-related microbes such as Shigella and Escherichia Coli, and increase of the enrichments of anti-inflammatory-related microbes. TRF and IER also improved the short chain fatty acid formation in colitis mice. In conclusion, the TRF and IER but not ADF exhibited the protective effects against colitis and related behavioral disorders, which could be partly explained by improving the gut microbiome compositions and preventing gut leak, and consequently suppressing the inflammation and oxidative damages in both colon and brain. The current research indicates that proper IF regimens could be effective strategies for nutritional intervention for the prevention and treatment of colitis.
间歇性禁食(IF)已被报道通过降低肠道炎症和改变肠道微生物多样性对改善肠道功能具有有益作用。在这项研究中,我们旨在研究三种不同的常见 IF 治疗方法(隔日禁食(ADF)、限时进食(TRF)和间歇性能量限制(IER))对葡聚糖硫酸钠(DSS)诱导的结肠炎小鼠模型的差异影响。结果表明,TRF 和 IER,但不是 ADF,提高了结肠炎小鼠的存活率。TRF 和 IER,但不是 ADF,通过改善肠道屏障完整性和结肠长度来逆转结肠炎的病理发展。重要的是,TRF 和 IER 抑制了结肠组织中的炎症反应和氧化应激。有趣的是,TRF 和 IER 还减轻了结肠炎相关的焦虑样和强迫症行为,并减轻了神经炎症和氧化应激。TRF 和 IER 还改变了肠道微生物群落的组成,包括减少结肠炎相关微生物(如志贺氏菌和大肠杆菌)的富集,增加抗炎相关微生物的富集。TRF 和 IER 还改善了结肠炎小鼠中的短链脂肪酸形成。总之,TRF 和 IER 但不是 ADF 对结肠炎和相关行为障碍表现出保护作用,这部分可以通过改善肠道微生物群落组成和防止肠道渗漏来解释,从而抑制结肠和大脑中的炎症和氧化损伤。目前的研究表明,适当的 IF 方案可能是预防和治疗结肠炎的营养干预的有效策略。