目的使用粪菌移植方法经口途径获得阿尔茨海默症人源肠道菌群(human flora-associated,HFA模型小鼠,并通过生物信息学、组织病理学等方法对模型进行评价。方法无菌雌性C57BL/6J小鼠28只,随机分为阿尔茨海默症模型(AD)组和对照(CON)组,...目的使用粪菌移植方法经口途径获得阿尔茨海默症人源肠道菌群(human flora-associated,HFA模型小鼠,并通过生物信息学、组织病理学等方法对模型进行评价。方法无菌雌性C57BL/6J小鼠28只,随机分为阿尔茨海默症模型(AD)组和对照(CON)组,分别经口途径接种阿尔茨海默症患者及健康志愿者的新鲜粪便悬液,在移植6、10周后每组安乐7只动物,取粪便进行16S r DNA检测;取脑组织和血液进行Aβ含量、细胞因子检测,脑组织进行组织病理学检查。结果CON组与AD组动物体重增长差异无显著性。α-多样性分析,在造模后两个时间点AD组Simpson指数升高(P<0.05,P<0.01),ACE(P<0.05)和Chao1(P<0.05),Shannon指数降低(P<0.05,P<0.01),与CON组比较差异有显著性。在科水平,AD组拟杆菌科丰度升高(P<0.01,P<0.05),毛螺菌科(P<0.001)、消化链球菌科(P<0.01)丰度降低;在属水平,AD组拟杆菌属丰度升高(P<0.01,P<0.05),梭菌属(P<0.01,P<0.05)、毛螺菌属(P<0.01,P<0.0001)、寄生菌属(P<0.01,P<0.001)丰度降低,与CON比较差异有显著性。β-多样性分析结果,AD组、CON组不同时间点肠型分布在相同区域,不同组别肠型分布在不同区间。2组动物的肠道菌群在微生物物种构成方面存在显著性差异(P<0.05)。AD组小鼠在建模10周时血液和脑中Aβ40含量升高(P<0.05,P<0.01),与CON组比较差异有显著性。与老年斑形成相关的细胞因子检测,IL-1β在建模6周时浓度降低(P<0.05);IL-10在建模6周时升高(P<0.01);TGF-β在建模10周时浓度降低(P<0.01),与CON组比较差异有统计学意义。组织病理学检查未见老年斑生成。结论本研究通过接种患者粪便悬液的方法建立了阿尔茨海默症人源菌群小鼠模型,模型小鼠肠道菌群的结构丰度、与老年斑生成相关细胞因子含量等指标的改变与阿尔茨海默症病人的临床表现类似。展开更多
Affiliationunit: The CAS Bureau for Coordinated Development Between Nature & Society The WDC, standing for the World Data Center,is one of the subordinate bodies under the International Council of Scientific Union...Affiliationunit: The CAS Bureau for Coordinated Development Between Nature & Society The WDC, standing for the World Data Center,is one of the subordinate bodies under the International Council of Scientific Unions (ICSU) for the benefit of the international community of scientists and provides a global mechanism of data management for all disciplinary developments related to the Earth, environment and Sun. The WDC is in charge of the collection, archiving, distribution and exchange of these data, which cover a variety of time scales ranging from seconds to millennia and con tain baseline information for scientific research, in line with procedures and standards展开更多
Affiliation unit: Lanzhou Institute of Glaciology and Cold Regions Environment, CAS Brief history: The Laboratory of Ice Core and Cold Regions Environment (LICCRE) was formally approved to open domestically and intern...Affiliation unit: Lanzhou Institute of Glaciology and Cold Regions Environment, CAS Brief history: The Laboratory of Ice Core and Cold Regions Environment (LICCRE) was formally approved to open domestically and internationally by Chinese Academy of Sciences in April 1997. It is attached to the Lanzhou Institute of Glaciology and Geocryology, CAS.展开更多
文摘目的使用粪菌移植方法经口途径获得阿尔茨海默症人源肠道菌群(human flora-associated,HFA模型小鼠,并通过生物信息学、组织病理学等方法对模型进行评价。方法无菌雌性C57BL/6J小鼠28只,随机分为阿尔茨海默症模型(AD)组和对照(CON)组,分别经口途径接种阿尔茨海默症患者及健康志愿者的新鲜粪便悬液,在移植6、10周后每组安乐7只动物,取粪便进行16S r DNA检测;取脑组织和血液进行Aβ含量、细胞因子检测,脑组织进行组织病理学检查。结果CON组与AD组动物体重增长差异无显著性。α-多样性分析,在造模后两个时间点AD组Simpson指数升高(P<0.05,P<0.01),ACE(P<0.05)和Chao1(P<0.05),Shannon指数降低(P<0.05,P<0.01),与CON组比较差异有显著性。在科水平,AD组拟杆菌科丰度升高(P<0.01,P<0.05),毛螺菌科(P<0.001)、消化链球菌科(P<0.01)丰度降低;在属水平,AD组拟杆菌属丰度升高(P<0.01,P<0.05),梭菌属(P<0.01,P<0.05)、毛螺菌属(P<0.01,P<0.0001)、寄生菌属(P<0.01,P<0.001)丰度降低,与CON比较差异有显著性。β-多样性分析结果,AD组、CON组不同时间点肠型分布在相同区域,不同组别肠型分布在不同区间。2组动物的肠道菌群在微生物物种构成方面存在显著性差异(P<0.05)。AD组小鼠在建模10周时血液和脑中Aβ40含量升高(P<0.05,P<0.01),与CON组比较差异有显著性。与老年斑形成相关的细胞因子检测,IL-1β在建模6周时浓度降低(P<0.05);IL-10在建模6周时升高(P<0.01);TGF-β在建模10周时浓度降低(P<0.01),与CON组比较差异有统计学意义。组织病理学检查未见老年斑生成。结论本研究通过接种患者粪便悬液的方法建立了阿尔茨海默症人源菌群小鼠模型,模型小鼠肠道菌群的结构丰度、与老年斑生成相关细胞因子含量等指标的改变与阿尔茨海默症病人的临床表现类似。
文摘Affiliationunit: The CAS Bureau for Coordinated Development Between Nature & Society The WDC, standing for the World Data Center,is one of the subordinate bodies under the International Council of Scientific Unions (ICSU) for the benefit of the international community of scientists and provides a global mechanism of data management for all disciplinary developments related to the Earth, environment and Sun. The WDC is in charge of the collection, archiving, distribution and exchange of these data, which cover a variety of time scales ranging from seconds to millennia and con tain baseline information for scientific research, in line with procedures and standards
文摘Affiliation unit: Lanzhou Institute of Glaciology and Cold Regions Environment, CAS Brief history: The Laboratory of Ice Core and Cold Regions Environment (LICCRE) was formally approved to open domestically and internationally by Chinese Academy of Sciences in April 1997. It is attached to the Lanzhou Institute of Glaciology and Geocryology, CAS.
