【摘要】 目的　探讨大鼠胰岛B细胞功能对Th1/Th2淋巴细胞分化的影响及其机制。方法　 2 0 0 2 - 11～ 2 0 0 3- 0 9在北京大学人民医院将 4 0只雄性SD大鼠随机分A、B、C、D和E组 ,每组 8只。A组 :腹腔注射链脲菌素(STZ)建成 1型糖尿病模型 ;B组 :腹腔注射卵清蛋白 (OVA )致敏 +OVA激发建成哮喘大鼠模型 ;C组 :腹腔注射STZ +OVA致敏和激发 ;D组 :腹腔注射STZ +皮下注射胰岛素 +OVA致敏和激发 ;E组为对照组。检测各组血清C肽浓度、支气管肺泡灌洗液 (BALF)IL 4和IFN γ质量浓度。结果　与对照组比较 ,A、C组的血清C肽浓度显著下降 ,而BALF的IFN γ质量浓度显著增高 ,IL 4质量浓度显著下降 ;与C组比较 ,D组经注射胰岛素后 ,其BALF中的IFN γ质量浓度显著降低 (137 6 3± 9 94vs 111 0 0± 12 14 ,P <0 0 5 ) ,IL 4质量浓度显著增高 (11 0 0± 3 93vs15 6 3± 2 6 7,P <0 0 5 )。结论　大鼠胰岛B细胞功能对Th1/Th2淋巴细胞的分化有调节作用。更多还原

【Abstract】 Objective To investigate the effects of islet B cells of rat on the differentiation of T-helper lymphocytes and its potential mechanism.Methods Forty male SD rats were equally divided into five groups.Group-A:render diabetes by injection of streptozotocin (STZ);Group-B:OVA sensitized and then OVA challenged to render asthma;Group-C:render diabetes and then OVA sensitized,and challenged;Group-D:render diabetes,and then insulin subcutaneous injection,OVA sensitized,and challenged;Group-E:nondiabetes,nonsensitized,only OVA challenged.Bronchoalveolar lavage (BAL) was performed in rats from each group 24h after challenged and BAL fluid was used to detect IFN-γ and IL-4.Blood glucose was estimated,total and differential leukocyte counts were carried out in blood samples and C-peptide concentration was tested in serum.Results The C-peptide concentration in serum was decreased significantly,while INF-γ expression was higher,and IL-4 expression was markedly lower in BAL fluid in both group-A and group-C when compared with that of controls,respectively.Compared with group-C,IL-4 expression was increased and INF-γ were significantly lower,respectively in BAL fluid of group-D after insulin subcutaneous injection.Conclusion Islet B cells of rat might modulate the differentiation of T-helper lymphocyte.更多还原