Changes in the intestinal flora of rats under high altitude hypoxia
10.16438/j.0513-4870.2020-1628
- VernacularTitle:高原低氧环境对大鼠肠道菌群的影响
- Author:
Gui-qin LIU
1
;
Xue BAI
2
;
Ya-bin DUAN
2
;
Jun-bo ZHU
2
;
Jian-xin YANG
2
;
Qian WANG
3
;
Yang ZHOU
3
;
Wen-qi GU
3
;
Xiang-yang LI
3
,
4
Author Information
1. College of Eco-Environmental Engineering, Qinghai University, Xining 810016, China
2. Research Center for High Altitude Medicine, Qinghai University, Xining 810001, China
3. Medical College of Qinghai University, Xining 810001, China
4. State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
- Publication Type:Research Article
- Keywords:
plateau;
hypoxia;
intestinal flora;
16S rDNA;
ifferential microbiota of gut microorganisms;
iversity
- From:
Acta Pharmaceutica Sinica
2021;56(4):1100-1108
- CountryChina
- Language:Chinese
-
Abstract:
The structure and diversity of the intestinal flora in rats exposed to high altitude hypoxia was investigated. Animal experiments strictly follow the regulations of Medical Laboratory Animal Ethics Committee of Qinghai University, School of Medicine. SD rats were randomly divided into a control group, a moderate altitude hypoxia group, and a high altitude hypoxia group. The pH value of the feces was measured and histopathological changes in the small intestine were determined by HE staining, and the intestinal flora were characterized by 16S rDNA high throughput sequencing technology on the 3rd, 7th, 15th, and 30th day of hypoxia exposure. Compared with the control group, the fecal pH value of rats in the moderate altitude hypoxia group and the high altitude hypoxia group was decreased significantly. The lamina propria and submucosa capillaries were slightly dilated and congested on the 3rd day in the moderate altitude hypoxia group. In the high altitude hypoxia group the submembrane capillaries were dilated and congested, the lamina propria of the mucosa showed mild edema, and the lymphatic vessels were dilated on the 7th day. The composition and diversity of intestinal flora in these rats changed significantly with prolonged exposure to the high altitude hypoxic environment. A total of 35 phyla, 87 classes, 205 orders, 337 families, 638 genera, and 256 species were annotated in the three groups of rats, including Firmicutes, Clostridia, Clostridiales, Ruminococcaceae, Akkermansia, and Lactobacillus_murinus. Compared with the control group, the intestinal flora of the hypoxic groups showed the most significant changes by the 15th day. There were 9 microbiota of gut microorganisms with relative abundance in the moderate altitude hypoxia group, of which Rikenellaceae_RC9_gut_group bacteria was the most common, there were 19 different microbiota of gut microorganisms with higher relative abundance in the high altitude hypoxia group, of which Ruminococcaceae bacteria was the most common. The results of this study indicate significant changes in the intestinal flora with high altitude hypoxia, and establish a foundation for further research on the initiation and development of diseases and drug metabolism in high altitude hypoxia.
