嗜酸乳酸杆菌对过敏性鼻炎模型大鼠血清中组胺、IL-5、IL-12及组织中ICAM-1的影响

摘要

目的：探讨嗜酸乳酸杆菌（LBA ）对过敏性鼻炎模型大鼠血清中组胺、白细胞介素（IL ）‐5、IL‐12及组织中细胞黏附因子‐1（ICAM‐1）的影响。方法48只雄性SD大鼠随机分为对照组、模型组、LBA 组（1×1010 CUF／kg）、氯雷他定（LRD）组（5 mg／kg），每组12只；LBA组每天灌胃1次，共6周；LRD组每天灌胃1次，共7 d。对大鼠临床症状进行评分，并检测血清中组胺、IL‐5、IL‐12的水平，鼻黏膜组织ICAM‐1 mRNA及蛋白的表达，观察组织病理改变。结果 LBA能显著改善AR模型大鼠症状评分，组织病理评分，改善AR引起的鼻痒、喷嚏、清涕等症状；降低血清组胺、IL‐5水平，组织ICAM‐1 mRNA及蛋白表达，提高血清IL‐12水平，对AR有显著治疗作用。结论长期（6周）给予LBA治疗可降低血清组胺、IL‐5水平及组织中ICMA‐1的表达，提高血清IL‐12水平对A R发挥治疗作用。%Objective To study the effect of lactobacillus on serum histamine ,interleukin‐5(IL‐5) ,interleukin‐12(IL‐12) and tissue intercellular cell adhesion molecule‐1(ICAM‐1) on the rats of allergic rhinitis model .Methods Totally 48 male SD rats were randomly divided into control group ,model group ,Lactobacillus (LBA) group (1 × 1010 CUF/kg) and loratadine (LRD) group (5 mg/kg) ,there were 12 SD rats in each group .LBA Group administered once daily for a total of 6 weeks ;LRD group administered once daily for seven days .Then the clinical symptoms indexes ,the content of serum histamine ,IL‐5 ,IL‐12 ,the changes of tissue pathological ,the mRNA and protein of ICAM‐1 were compared .Results Lactobacilli can significantly improve symptoms score of allergic rhinitis in rats ,the pathological score ,reduce serum histamine ,IL‐5 levels ,ICAM‐1 mRNA and protein expression of tissue , and increase IL‐12 proportion ,thus it showed significant efficacy .Conclusion Long‐term (approximately six weeks) given lactoba‐cilli played a therapeutic role of allergic rhinitis by reducing serum histamine ,IL‐5 levels and ICM A‐1 expression in tissues ,in‐creased serum IL‐12 level .