模拟失重环境对人源化肠道菌群小鼠肠道菌群结构和生理影响研究
首发时间:2024-04-09
摘要:目的:采用人源化肠道菌群小鼠来模拟宇航员和尾部悬吊模拟失重来研究空间环境对宇航员肠道菌群等的影响,为失重所致健康损害提供科学依据。方法:采用人源化小鼠尾部悬吊20天的实验方案来进行研究,40只KM小鼠随机分为空白对照组、悬尾组、人源化对照组和人源化悬尾组,每组10只。实验结束收集小鼠粪便样本进行肠道菌群研究。结果:与非人源化组相比,人类样本中拟杆菌属和副拟杆菌属的丰度较高,人源化结束后,人源化组样本中拟杆菌属和副拟杆菌属的丰度升高。与空白对照组相比,悬尾组另枝菌属丰度降低。与人源化对照组相比,人源化悬尾组乳杆菌属丰度降低。与悬尾组悬尾0天相比,悬尾组悬尾20天的阿克曼氏菌丰度降低。与人源化悬尾组悬尾0天相比,人源化悬尾组悬尾20天的阿克曼氏菌丰度降低。结论:人类肠道菌群定植到了小鼠体内。长时间暴露在失重环境中可能导致人源化悬尾组和悬尾组小鼠肠道菌群紊乱,增加患糖尿病和非酒精性脂肪肝的风险。
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Study on the effects of simulated weightlessness environment on the structure and physiology of intestinal microbiota in humanized intestinal microbiota mice
Abstract:Objective:To study the effects of space environment on astronauts\' intestinal microbiota by using humanized intestinal microbiota mice to simulate astronauts and tail suspension to simulate weightlessness, so as to provide a scientific basis for the health damage caused by weightlessness. Methods:A 20-day experimental protocol was used to suspend the tail of humanized mice, and 40 KM mice were randomly divided into blank control group, tail suspension group, humanized control group and humanized tail suspension group, with 10 mice in each group. At the end of the experiment, fecal samples of mice were collected for intestinal microbiota study. Results:Compared with the non-humanized group, the abundance of Bacteroides and parabacteroides in the human group was higher, and the abundance of Bacteroides and parabacteroides in the humanized group increased after the humanization ended. Compared with the blank control group, the abundance of Alistips in the tail suspension group was reduced. Compared with the humanized control group, the abundance of Lactobacillus in the humanized tail suspension group was reduced. The abundance of Akkermansia in the overhang group for 20 days was reduced compared with the suspension of the tail group at 0 days. Compared with the humanized suspension group with a suspension of 0 days, the abundance of Akkermansia at 20 days in the humanized suspension group was reduced. Conclusion:Human intestinal microbiota colonized in mice. Prolonged exposure to weightlessness may lead to intestinal microbiota disorders in humanized suspensory and suspensory mice, increasing the risk of diabetes and nonalcoholic fatty liver disease.
Keywords: MetaboliteSpace environment Simulated microgravity Humanized mouse Intestinal flora
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模拟失重环境对人源化肠道菌群小鼠肠道菌群结构和生理影响研究
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