α4β7研究进展

α４β７是一种整合素分子，主要介导淋巴细胞向粘膜部位的迁移和归巢，同时参与一些炎症反应，并对肠相关淋巴组织（ＧＡＬＴ）的发育，粘膜部位的免疫应答等有重要作用。     

脾虚湿蕴证溃疡性结肠炎模型构建及T淋巴细胞变化的研究

目的 构建脾虚湿蕴证溃疡性结肠炎小鼠模型及探明T淋巴细胞在该模型中的特征。方法 C57BL/6小鼠，随机分为Control组、FXY组、3%DSS组、FXY+3%DSS组和FXY+2%DSS组。采用DSS联合番泻叶(FXY)建立脾虚湿蕴证溃疡性结肠炎小鼠模型，造模结束后，HE染色观察结肠组织结构变化；ELISA法检测结肠组织炎性细胞因子的浓度，流式细胞术测定CD4/CD8 T淋巴细胞、Th1/Th2、Th17/Treg细胞水平。结果 FXY组小鼠的临床症状以腹泻为主，3%DSS组的小鼠以便血为主，而FXY+3%DSS组和FXY+2%DSS组小鼠表现出腹泻和便血同行，但FXY+3%DSS组小鼠生存率低至50%。与Control组相比，3%DSS组、FXY+3%DSS组和FXY+2%DSS组体重、结肠长度及抗炎性细胞因子IL-10、TGF-β1浓度均显著降低，而DAI、结肠重量、促炎性细胞因子TNF-α、IL-1β、IL-6浓度均显著上升；FXY+3%DSS组和FXY+2%DSS组肠系膜淋巴结中的CD4、Th1、Th17细胞百分比显著上升，而CD8、Th2、Treg细胞显著下降。结论 番泻...     

过继转输的父系抗原耐受T细胞诱导受体母-胎免疫耐受的机制研究

To study the effect of adoptive transfer of paternal antigen-tolerant T cells on recipient reactive T cells, CBA/JxDBA/2 mating was recruited as an abortion-prone model, and CBA/JxBALB/c mating as a successful pregnancy model. The abortion-prone CBA/J females mated with DBA/2 males were injected intraperitoneally with rat anti-mouse CD80 and CD86 mAb or rat isotype IgG at day 4 after gestation (time of implantation). The purified T cells were obtained from spleen of the pregnant CBA/J mice using magnetic beads at day 9 after gestation and labeled with CFSE in vitro. The CFSE-labeled T cells were intravenously injected into other CBA/J females mated with DBA/2 males at day 4 after gestation. The proliferation of recipient splenocytes in response to DBA/2 stimulator cells was evaluated at day 9 after gestation in vitro, and the expressions of intracellular cytokines and costimulatory molecules in CFSE +/- T cells were analyzed by flow cytometry. The results showed that adoptive transfer of either paternal antigen-tolerant T cells or T cells from BALB/c-mated CBA/J mice significantly suppressed the proliferation of recipient splenocytes in response to DBA/2 stimulator cells and resulted in lower frequency of cells positive for IL-2, IFN-gamma, CD28 and higher frequency of IL-10,CTLA-4-producing cells in both CFSE+ CD3+ population and CFSE- CD3+ population compared with adoptive transfer of T cells from isotype IgG-treated CBA/J mice, whereas the frequency of IL-4-producing cells did not appear significant change. Our findings suggest that paternal antigen-tolerant T cells transferred in recipient not only function as antigen-specific suppresser cells but also disable the recipient reactive T cells, which co-suppresses maternal rejection to the allogeneic fetus, thus resulting in the decrease of the embryo resorption rate of the abortion-prone mice to that of the normal pregnancy mice.     

胞质分裂阻滞细胞的微核检测及方法学初步研究

培养人体外周血淋巴细胞的微核检测,是近年来常用的体外短期检测方法之一,可用来评价被检理化因子对人体细胞的遗传毒性,及监测环境、职业接触等有害因子对人类的潜在致癌作用。为了进一步提高该方法的敏感性,根据微核起源于染色体断片与落后染色体的观