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1芒柄花素对免疫抑制小鼠小肠黏膜免疫功能的影响显示文摘本研究旨在探讨芒柄花素(FMN)对免疫抑制小鼠小肠黏膜免疫功能的影响。将50只昆明种小鼠随机分为5组,分别为空白对照组、免疫抑制模型组以及FMN低、中、高剂量组,每组10只。试验共28 d,前7 d,空白对照组小鼠每天灌胃0.6 mL生理盐水,其他组小鼠灌胃40 mg/(kg·d)环磷酰胺(CTX)0.6 mL;后21 d,空白对照组与免疫抑制模型组小鼠每天灌胃0.6 mL生理盐水,FMN低、中、高剂量组小鼠分别灌胃50、150、250 mg/(kg·d)FMN 0.6 mL,末次给药24 h后,处死小鼠并测定小鼠脾脏和胸腺指数;采用酶联免疫吸附试验(ELISA)法测定小肠黏膜组织匀浆中白细胞介素-2(IL-2)、白细胞介素-6(IL-6)及分泌型免疫球蛋白A(sIgA)的含量;常规石蜡包埋组织切片,苏木精-伊红(HE)染色法与过碘酸雪夫(PAS)染色法测定小肠绒毛高度、隐窝深度、绒腺比、上皮内淋巴细胞(IELs)数量以及杯状细胞数量;透射电子显微镜观察小肠黏膜超微结构特性。结果表明:CTX成功复制了小鼠免疫抑制模型,且免疫抑制小鼠小肠黏膜免疫屏障明显受损。FMN各剂量组均可以提高免疫抑制小鼠肠黏膜免疫功能,其中以FMN中剂量组作用最明显,与免疫抑制模型组相比,胸腺指数、小肠黏膜IL-2、IL-6含量差异显著(P<0.05),脾脏指数和肠黏膜sIgA含量差异极显著(P<0.01)。同时,FMN能不同程度地修复免疫抑制小鼠小肠绒毛结构,使小肠绒毛高度和绒腺比增加。电镜观察显示,FMN能不同程度地修复免疫抑制小鼠小肠黏膜上皮细胞的超微结构损伤,维持上皮细胞完整性和连续性。综上所述,FMN可显著改善和促进免疫抑制小鼠小肠黏膜免疫功能的恢复和增强,同时,还可减少小肠黏膜损伤,恢复和促进小肠黏膜结构和功能的稳定。毛甜甜 白衡 贾宁 2022动物营养学报2022,34,4:4
2Serologic diagnosis of celiac disease: May it be suitable for adults?显示文摘The diagnosis of coeliac disease(CD)in adult patients requires the simultaneous assessment of clinical presentation,serology,and typical histological picture of villous atrophy.However,several years ago,the European Society of Pediatric Gastroenterology,Hepatology,and Nutrition guidelines approved new criteria for the diagnosis in children:Biopsy could be avoided when antitransglutaminase antibody(TGA)values exceed the cut-off of×10 upper limit of normal(ULN)and anti-endomysium antibodies are positive,independently from value.This“no biopsy”approach is a decisive need for pediatric population,allowing to avoid stressful endoscopic procedures in children,if unnecessary.This approach relies on the correlation existing in children between TGA levels and assessment of mucosal atrophy according to Marsh’s classification.Several lines of evidence have shown that patients with villous atrophy have markedly elevated TGA levels.Therefore,we aim to perform a narrative review on the topic in adults.Despite that some studies confirmed that the×10 ULN threshold value has a very good diagnostic performance,several lines of evidence in adults suggest that TGA cut off should be different from that of pediatric population for reaching a good correlation with histological picture.In conclusion,the heterogeneity of study reports as well as some conditions,which may hamper the serological diagnosis of CD(such as seronegative CD and non-celiac villous atrophy)and are much more common in adults than in children,could represent a limitation for the“no biopsy”approach to CD diagnosis in patients outside the pediatric age.Giuseppe Losurdo Milena Di Leo Edoardo Santamato Monica Arena Maria Rendina Carmelo Luigiano Enzo Ierardi Alfredo Di Leo 2021World Journal of Gastroenterology2021,27,42:0
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