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南京医科大学学报(自然科学版)                                  第41卷第5期
               ·652 ·                     Journal of Nanjing Medical University(Natural Sciences)   2021年5月


             ·基础医学·

              肠上皮11β⁃HSD1特异性敲除小鼠的小肠上皮屏障功能的研究



              王梦茜,金 燚,夏 凡,俞 静,丁国宪                 *
              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:探究小鼠肠上皮11β⁃羟类固醇脱氢酶(11β⁃hydroxysteroid dehydrogenase,11β⁃HSD1)基因特异性敲除对小肠
              上皮屏障功能的影响。方法:在C57BL/6J小鼠构建肠上皮特异性11β⁃HSD1敲除模型,野生型对照组和11β⁃HSD1敲除组分别
              给予高脂饮食喂养(第6周开始,喂养8周)。通过免疫组化方法观察小鼠小肠上皮绒毛、隐窝、杯状细胞数量、紧密连接蛋白⁃1
             (zona occludens⁃1,ZO⁃1)和炎症标志物F4/80的变化。结果:11β⁃HSD1基因敲除能够改变高脂饮食肥胖小鼠的绒毛长度和杯
              状细胞数量,显著减轻高脂饮食肥胖小鼠的小肠上皮炎症,改变紧密连接蛋白表达。结论:高脂饮食导致的小鼠小肠上皮屏障
              功能变化与11β⁃HSD1的作用密切相关。
             [关键词] 11β⁃HSD1特异性敲除;肠上皮;屏障功能;炎症
             [中图分类号] R329.25                   [文献标志码] A                       [文章编号] 1007⁃4368(2021)05⁃652⁃05
              doi:10.7655/NYDXBNS20210503


              Study on intestinal epithelial barrier function of 11β⁃hydroxysteroid dehydrogenase(11 β ⁃
              HSD1)specific knockout mouse

                                                              *
              WANG Mengxi,JIN Yi,XIA Fan,YU Jin,DING Guoxian
              Division of Geriatric Endocrinology,the First Affiliated Hospital of Nanjing Medical University,Nanjing 210029,
              China


             [Abstract] Objective:This study aims to explore the effect of 11β ⁃ hydroxysteroid dehydrogenase(11β ⁃ HSD1)gene specific
              knockout on intestinal epithelial barrier function in mice. Methods:the 11β⁃HSD1 knockout model was established in C57BL/6J mice.
              The wild⁃type control group and 11β⁃HSD1 knockout group were fed with high⁃fat diet(from the 6th week,feed for 8 weeks). The
              number of villi,crypts,goblet cells,and expression changes of ZO⁃1 and F4/80 were detected by immunohistochemistry. Results:11β⁃
              HSD1 gene knockout could change the villus length and goblet cell number of obese mice fed with high⁃fat diet,significantly reduce
              the intestinal epithelial inflammation and change the expression of tight junction protein in obese mice fed with high ⁃ fat diet.
              Conclusion:The changes of intestinal epithelial barrier function induced by high⁃fat diet are closely related to the effect of 11β⁃HSD1.
             [Key words] 11β⁃HSD1 specific knockout;intestinal epithelium;barrier function;inflammation
                                                                            [J Nanjing Med Univ,2021,41(05):652⁃656]




                                                                                            [2]
                  内脏肥胖与胰岛素抵抗、2 型糖尿病等代谢综                         的松变成有活性的氢化可的松 。11β⁃HSD1 水平
              合征密切相关,更是一种“慢性低度炎症性疾病”,                           的升高导致糖皮质激素活性增加,进而产生内脏肥
                                       [1]
                                                                                                 [3]
              是心脑血管疾病的罪魁祸首 。临床研究发现,11β⁃                         胖、高血压、血脂紊乱、胰岛素抵抗等 。
              羟类固醇脱氢酶(11β⁃hydroxysteroid dehydrogenase,              肠道是人体营养吸收的主要器官 ,同时又是
                                                                                                   [4]
              11β⁃HSD1)的升高与内脏肥胖的发生密切相关。作                        抵御化学物质和病原侵袭的第一细胞屏障和免疫
              为一种广泛的、高度可调控的酶,11β⁃HSD1是糖皮                        防御组织,因而在营养代谢和免疫反应中均起到重
              质激素作用的放大器,在人体内可催化无活性的可                            要的调节作用。肥胖不仅导致肠道微生物紊乱,还

             [基金项目] 国家自然科学基金面上项目(81870613)                      可通过紧密连接蛋白的破坏使肠道通透性增加,细
                                                                                                    [5]
              ∗                                                 菌内毒素穿透肠道,引起机体低度炎症 。但肠上
              通信作者(Corresponding author),E⁃mail:dinggx@njmu.edu.cn
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