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. 2020 Sep 1:102:1-11.
doi: 10.1016/j.niox.2020.05.002. Epub 2020 May 26.

Total body irradiation-induced colon damage is prevented by nitrate-mediated suppression of oxidative stress and homeostasis of the gut microbiome

Weili Wang  1 , Liang Hu  2 , Shimin Chang  3 , Linsha Ma  3 , Xiangchun Li  4 , Zi Yang  5 , Conglin Du  5 , Xingmin Qu  5 , Chunmei Zhang  6 , Songlin Wang  7
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V体育官网 - Total body irradiation-induced colon damage is prevented by nitrate-mediated suppression of oxidative stress and homeostasis of the gut microbiome

Weili Wang et al. Nitric Oxide. .
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Abstract

Inorganic dietary nitrate plays vital roles in biological functions via the exogenous NO3-/NO2-/NO pathway under hypoxia and ischemia. We previously verified the antioxidative effects of inorganic nitrate in a mouse model of total body irradiation (TBI). Accordingly, in this study, we evaluated the effects of inorganic nitrate on prevention of TBI-induced colon injury and dysbiosis of the gut microbiome. Nitrate significantly rescued the abnormal biological indexes (body weight, white blood cell, red blood cell, platelet, hemoglobin level and intestinal canal lengths) induced by TBI. Then, we detected oxidative stress and DNA damage indexes (phospho-histone H2AX and p53 binding protein 1), which were both increased by irradiation (IR) and alleviated by nitrate. IR-induced apoptosis and senescence were ameliorated by inorganic nitrate. The distribution of the gut microbiome differed for mice with TBI and those receiving inorganic nitrate. The average abundance of Lactobacillus significantly increased, and that of Bacteroidales decreased at the genus level in the nitrate group compared with that in the IR alone group. At 30 days after TBI, the abundances of Bacteroides and Faecalibaculum decreased, whereas that of Lactobacillus increased in the IR + nitrate group compared with that in the IR alone group. Inorganic nitrate efficiently prevents TBI-induced colon epithelium injury and maintains the homeostasis of the gut microbiome. Thus, our results showed that inorganic nitrate might be a promising treatment for TBI induced colon injury VSports手机版. .

Keywords: Colonic mucosa; Gut microbiome; Nitrate; Oxidative stress injury; Total body irradiation. V体育安卓版.

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Conflict of interest statement

Declaration of competing interest The authors declare no conflicts of interest.

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