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南京医科大学学报(自然科学版)                                  第43卷第4期
               ·452 ·                       Journal of Nanjing Medical University(Natural Sciences)  2023年4月


             ·基础研究·

              外源性IL⁃25对日本血吸虫感染引起肠壁损伤的影响



              孙思宇 ,杨宇轩 ,陈 璐 ,倪杨玥 ,常 浩 ,陈                   琳 ,侯 敏 ,徐志鹏 ,熊春蓉 ,杨             坤 ,季旻珺     1*
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               南京医科大学病原生物学系,江苏省现代病原生物学重点实验室,江苏                           南京   211166;江苏省血吸虫病防治研究所,江
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              苏 无锡 214064
             [摘    要] 目的:探究外源性白细胞介素(interleukin,IL)⁃25 对日本血吸虫感染所致小鼠肠壁损伤的影响。方法:24 只雌性
              C57BL/6J 小鼠随机分为正常组、正常+IL⁃25 组、感染组、感染+IL⁃25 组。感染组、感染+IL⁃25 组中每只小鼠感染日本血吸虫
              尾蚴40条;感染+IL⁃25组、正常+IL⁃25组小鼠于感染后或实验开始后第4周开始腹腔注射IL⁃25(0.5 μg/只,隔天注射1次,持续
              3 周)。感染6周后剖杀小鼠,取肝脏和肠组织制作病理切片,苏木素伊红(hematoxylin⁃eosin,HE)染色后观察小鼠肝脏、结肠病
              理学变化,阿尔新蓝⁃过碘酸雪夫(Alcian blue⁃periodic acid⁃Schiff,AB⁃PAS)染色观察小鼠结直肠内杯状细胞数量变化;酶联免
              疫吸附试验(enzyme⁃linked immunosorbent assay,ELISA)、实时荧光定量试验(real⁃time polymerase chain reaction,real⁃time PCR)
              检测小鼠结肠部位炎症相关因子 IL⁃10、IL⁃4、IL⁃13、肿瘤坏死因子⁃α(tumor necrosis factor α,TNF⁃α)、γ干扰素(interferon γ,
              IFN⁃γ)和IL⁃1β等的表达水平。结果:感染6周后的肠组织HE染色结果显示,日本血吸虫感染后,结直肠部位出现虫卵堆积,
              但是在经过IL⁃25注射之后,肠道损伤减轻,虫卵堆积减少;感染+IL⁃25组小鼠肠道单个肉芽肿面积显著低于感染组小鼠,但是
              感染组小鼠肝脏肉芽肿面积与感染+IL⁃25组小鼠无明显区别;AB⁃PAS结果显示IL⁃25能够显著增加日本血吸虫感染小鼠肠道
              杯状细胞数量;ELISA、real⁃time PCR结果显示感染日本血吸虫后小鼠结肠1型、2型细胞因子均有不同程度的升高,且在注射
              IL⁃25之后,呈现2型细胞因子表达量上升、1型细胞因子表达量下降的趋势。结论:IL⁃25可通过促进杯状细胞分化缓解日本
              血吸虫感染所致的肠壁损伤。
             [关键词] 日本血吸虫;肠壁损伤;IL⁃25
             [中图分类号] R383.2                    [文献标志码] A                       [文章编号] 1007⁃4368(2023)04⁃452⁃08
              doi:10.7655/NYDXBNS20230402


              Role of IL⁃25 in gut damage induced by Schistosoma japonicum infection

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              SUN Siyu ,YANG Yuxuan ,CHEN Lu ,NI Yangyue ,CHANG Hao ,CHEN Lin ,HOU Min ,XU Zhipeng ,XIONG
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              Chunrong ,YANG Kun ,JI Minjun 1*
              1 Department of Pathogen Biology,Nanjing Medical University,Jiangsu Province Key Laboratory of Modern Pathogen
              Biology,Nanjing 211166;Jiangsu Institute of Parasitic Diseases,Wuxi 214064,China
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             [Abstract] Objective:To investigate the effects of exogenous interleukin(IL)⁃25 in gut damage in mice caused by Schistosoma
              japonicum(S.japonicum)infection. Methods:Twenty ⁃ four female C57BL/6J mice were randomly divided into four groups,control
              group(n=5),control+IL⁃25(n=5),S.japonicum infection group(Inf,n=7),S.japonicum infection +IL⁃25 group(Inf+IL⁃25,n=7). Mice
              in the Inf group and Inf+IL⁃25 group were infected with forty S. japonicum cercariaes. IL⁃25 was intraperitoneally injected from the 4th
              week after infection(0.5 μg/mice every 2 days for 3 weeks). Six weeks after infection,mice were sacrificed. Hematoxylin eosin(HE)
              staining was performed in the liver and colon tissue to observed the pathological changes. Alcian blue⁃periodic and acid⁃Schiff(AB⁃PAS)
              staining was performed to observe the number of goblet cells in the colon. The levels of inflammation⁃related cytokines including IL⁃10,
              IL⁃4,IL⁃13,tumor necrosis factor α(TNF⁃α),interferon γ(IFN⁃γ),IL⁃1β in the colon were detected by enzyme linked immunosorbent
              assay(ELISA)and real ⁃ time polymerase chain reaction(real ⁃ time PCR). Results:HE staining results showed that the area of
              individual granulomas in the colon in the Inf+IL⁃25 group was significantly lower than that of mice in the Inf group,but the area of



             [基金项目] 国家自然科学基金(81971965,82272368);国家自然科学基金青年基金(81903621)
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              通信作者(Corresponding author),E⁃mail:jiminjun@njmu.edu.cn
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