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第43卷第8期                           南京医科大学学报(自然科学版)
                  2023年8月                   Journal of Nanjing Medical University(Natural Sciences)     ·1047 ·


               ·基础研究·

                11β⁃羟化类固醇脱氢酶敲除对高脂饮食喂养小鼠认知功能的

                影响



                曹   清,秦 丽,刘        娟 *

                南京医科大学第一附属医院老年医学科,江苏 南京                   210029



               [摘   要] 目的:探究11β⁃羟化类固醇脱氢酶1(11β⁃hydroxysteroid dehydrogenase,11β⁃HSD1)基因敲除对小鼠整体代谢和认
                知功能的影响。方法:将C57BL/6J为遗传背景的野生对照组及11β⁃HSD1基因敲除组各15只小鼠高脂喂养20周,代谢笼评估
                能量代谢,行为学评估观察小鼠认知功能,电镜评估海马体的线粒体结构,免疫荧光及PCR确定其认知功能、线粒体功能相关
                基因及炎症基因的变化。结果:11β⁃HSD1基因敲除能够提高高脂喂养小鼠学习和记忆能力,改善握力,改善海马体的微结构、
                线粒体含量变多,认知相关基因、线粒体呼吸功能相关基因上调,炎症相关基因改变。结论:11β⁃HSD1敲除后高脂饮食喂养小
                鼠认知功能显著改善,握力显著提高,可能是治疗认知功能障碍的有效靶点。
               [关键词] 11β⁃羟化类固醇脱氢酶1;认知功能;海马体;线粒体
               [中图分类号] R329.26                   [文献标志码] A                     [文章编号] 1007⁃4368(2023)08⁃1047⁃08
                doi:10.7655/NYDXBNS20230802


                Effect of 11β ⁃hydroxysteroid dehydrogenase knockout on cognitive function in high⁃fat
                diet⁃induced obese mice

                CAO Qing,QING Li,LIU Juan *
                Division of Geriatric Endocrinology,the First Affiliated Hospital of Nanjing Medical University,Nanjing 210029,
                China


               [Abstract] Objective:To investigate the effect of 11β⁃hydroxysteroid dehydrogenase(11β⁃HSD1)gene knockout on the metabolism
                and cognitive function of mice. Methods:A total of 15 mice each in the C57BL/6J genetic background wild control group and 11β⁃
                HSD1 gene knockout group were fed with high fat for 20 weeks. We then assessed energy metabolism by metabolic cage,observed their
                cognitive function by behavioral evaluation,evaluated hippocampus mitochondria by electron microscope,and determined changes in
                cognitive function,mitochondrial function⁃related genes,and inflammatory genes by immunofluorescence and RT⁃PCR. Results:The
                11β ⁃ HSD1 gene knockout in showed the enhanced learning and memory ability,increased grip strength,improved hippocampal
                microstructure,amplified mitochondrial content,up⁃regulated the genes related to cognition and mitochondrial respiratory function,and
                changed the inflammatory genes. Conclusion:Our study demonstrated that knockout 11β ⁃ HSD1 significantly improved cognitive
                function and grip strength mice fed high⁃fat diet,therefore may be an effective target for the treatment of cognitive dysfunction.
               [Key words] 11β⁃hydroxylsteroid dehydrogenase 1;cognitive function;hippocampus;mitochondria
                                                                            [J Nanjing Med Univ,2023,43(08):1047⁃1054]




                    随着当今人口老龄化不断加剧,衰老相关性疾                          代谢紊乱与认知功能障碍密切相关。人体研究发
                病已成为老年医学研究的重点,代谢紊乱性疾病和                            现,痴呆患者有高达39%的人患有2型糖尿病,而糖
                认知功能障碍是其中的重中之重。实际上,肥胖、                            尿病又使认知功能下降的风险增加2~4倍。动物研
                                                                  究证实,高脂饮食诱导的肥胖小鼠不仅具备代谢紊
               [基 金 项 目] 国 家 自 然 科 学 基 金 面 上 项 目(81871106,
                82071584)                                         乱的特征,也呈现认知功能损害的表现,被称为高
                ∗
                通信作者(Corresponding author),E⁃mail:lioujane@njmu.edu.cn  脂饮食诱导的认知功能损害(high⁃fat diet⁃induced
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