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find Keyword "T淋巴细胞" 47 results
  • Cytotoxic T Lymphocyte-Associated Antigen 4 Fusion Protein Induces Immunotolerance of Orthotopic Liver Transplantation in Rhesus Monkeys

    Objective To explore the effect of cytotoxic T lymphocyte-associated antigen 4 (CTLA4-Ig) fusion protein on the function of orthotopic liver allograft. Methods Orthotopic liver allograft models of rhesus monkeys were established in this study. The survival time, liver function and morphologic changes of graft were observed, respectively. The levels of IL-2 and IL-10 were detected by ELISA. Apoptosis was monitored by TUNEL.Results The average survival of control group was 6.57 d, while the average survival of CTLA4-Ig group was 14.92 d, which was statistically prolonged (Plt;0.05). Serum ALT level was highly increased, and Alb level decreased obviously in control group. While the levels of ALT and Alb kept in normal in CTLA4-Ig group. After day 3-7, the expressions of IL-2 were highly expressed in control group, while the expressions of IL-10 in CTLA4-Ig group were higher than those of control group. The severity of rejection reaction after day 3 was weaker in CTLA4-Ig group than that of control group by histological assessment. The apoptosis index after day 3 in the liver cells was highly increased in control group as compared with the CTLA4-Ig group. Conclusions CTLA4-Ig fusion protein therapy can induce immunotolerance and prolong the survival of recipients. The increasing of cytokines IL-2 or the decreasing of cytokines IL-10 may be one of the laboratory indexes in monitoring immunotolerance of transplantation.

    Release date:2016-09-08 10:50 Export PDF Favorites Scan
  • Comparison of the Change of T-Lymphocyte Subsets and Immunoglobulin in Postoperative Gastric Carcinoma Patients with Regional Intra-Artery Implantation Pump Chemotherapy Versus Peripheral Venous Chemotherapy

    Objective To observe the turbulence of regional intra-artery implantation chemotherapy and peripheral venous chemotherapy on immunologic function of patients. Methods Two weeks after radical operation of gastric carcinoma, chemotherapy was performed. Eighty-three patients were divided into two groups, one (42 patients) received peripheral venous chemotherapy (PVC) and the other (41 patients) received regional intra-artery implantation pump chemotherapy (RAIPC). The serum T-lymphocyte subsets and immunoglobulin level before and 1-4 days after the chemotherapy were measured. Results After PVC, proportion of CD3 and CD4, CD4/CD8 and IgG, IgA, IgM concentration in PVC group were significantly decreased compared with those before PVC (P<0.05, P<0.01), and it is the same when compared with postRAIPC patients except for CD4 and IgM (P<0.05). In RAIPC group, there were no significant changes in proportion of CD3, CD4 and CD8, CD4/CD8 and IgG, IgA concentration between pre- and post-RAIPC patients. Conclusion After radical operation of gastric carcinoma, RAIPC affects the immunologic function more moderate than PVC.

    Release date:2016-08-28 04:43 Export PDF Favorites Scan
  • 乳腺癌免疫逃逸机理的研究进展

    目的 综述乳腺癌细胞逃避机体免疫监视机理的研究进展。 方法 复习国内、外相关文献,从主要组织相容性抗原复合物(MHC)Ⅰ类分子表型改变、缺乏共刺激信号、肿瘤表达FasL、人类TNF相关凋亡诱导配体(TRAIL)的杀伤作用以及肿瘤抗原诱导机体免疫耐受几个方面对乳腺癌免疫逃逸机理的研究进展加以综述。 结果 MHCⅠ类分子表型改变,共刺激分子B7缺乏,肿瘤细胞表达FasL和TRAIL, 以及肿瘤抗原诱导机体免疫耐受与乳腺癌免疫逃逸有关。 结论 乳腺癌细胞通过自身抗原改变、不表达共刺激分子、诱导机体T淋巴细胞凋亡和机体免疫耐受而逃避机体免疫监视,但对其免疫逃逸机理中各种因素的相互影响和综合作用尚未被充分认识。

    Release date:2016-08-28 04:43 Export PDF Favorites Scan
  • Experimental Study on Gut Mucosal CellMediated Immunity after Major Hepatectomy and Its Relation to Bacteria Translocation in Rats

    ObjectiveTo investigate the change of cellmediated immunity in gut mucosa after major hepatectomy and to study its relationship with the bacteria translocation.MethodsFortyeight Spraguedawley adult male rats were randomly allocated into two groups, the sham operation group and the operation group. Besides without the hepatectomy, the sham operation group has the same course with the operation group. Seventy percent hepatectomy rats are divided as postoperative 6 h group (n=6),12 h group (n=6),24 h group (n=6) and 72 h group (n=6). Sixhour, 12hour, 24hour and 72hour after operation specimens were taken from jejunoileum respectively. Immunohistochemical staining was performed on frozen sections and image pattern analysis was used. We also investigate the change of liver function. ResultsTwentyfour hours and 72 hours after 70% hepatectomy, there was a significant reduction in the number of CD3+,CD4+and CD8+ T lymphocytes in the mucosal lamina propria of the operation group compared with the sham operation group (Plt;0.05). There was significant difference between these two groups in liver function change (Plt;0.05).ConclusionThere is an altered pattern of intestinal mucosal T lymphocytes after major hepatectomy, then the local cellmediated immunity was depressed, which may be the cause of translocation of enteric bacteria.

    Release date:2016-08-28 04:49 Export PDF Favorites Scan
  • The Effect of CD3AK Cells on T Lymphocyte Subsets and Its Functions of Patients with Primary Liver Carcinoma

    Objective To explore the effect of CD3AK cells on T lymphocyte subsets and its functions of patients with primary liver carcinoma (PLC). MethodsFiftyeight patients with PLC were divided into two groups, CD3AK group (n=37), control group (n=21). Eleven blood donors were taken as normal control. All patients from the treatment group were given 2×109 CD3AK cells once a day for 5 days on the 1st day after operation, having received IL2 at a dose of 100 units per 24 hour by intravenous injection starting 30 minutes before administration of CD3AK cells. T lymphocyte subsets, IL2R, NK activity, LAK activity and proliferative activity were determined. ResultsThe CD4/CD8 ratio, expression of IL2R, proliferative activity, NK activity and LAK activity of T lymphocytes from the treatment group were significantly higher than those of control respectively.Conclusion The adoptive transfer of CD3AK cells could improve the disorder of T lymphocyte subsets and its functions and provide the patients with PLC with fresh abundant effectors against tumor.

    Release date:2016-08-28 05:11 Export PDF Favorites Scan
  • The Costimulatory Pathway B7CD28/CTLA4 and the Islets of Langerhans Transplantation

    ObjectiveTo investigate the significant effect of costimulatory pathway B7CD28/CTLA4 on the islets of Langerhans transplantation. MethodsThe literatures were reviewed to summarize the molecular structure and functions of the pathway and the related animal experiments.ResultsThe costimulatory pathway B7CD28/CTLA4 was one of the signaling pathways of T cells activation and proliferation. If the costimulatory signals were absent, Tlymphocyte would be induced to the clonalanegy. Through blocking the costimulatory pathway mediated by CD28, CTLA4Ig prolonged to the islets of Langerhans survival in recipients. ConclusionBy the studies of the costimulatory pathway, it is helpful to understand the immune mechanism of the survival of islet grafts.

    Release date:2016-08-28 05:12 Export PDF Favorites Scan
  • THE COMPARATIVE STUDY ON THE ESTABLISHMENT AND ITS CONDITION FOR THE CLONE OF RECIPIENT AGAINST DONOR ANTIGEN-SPECIFIC T LYMPHOCYTES

    【Abstract】Objective To explore the feasibility that the recipient against donor antigen-specific T lymphocytes clones are formed,and the suicide genes are induced into the clone. In the end it may induce the transplanted-organ tolerance. Methods The recipient rats were immunized by the donor rats-splenocytes, then the recipient’s T cell were isolated, purified and diluted with limited-dilute methods into single cell.The T cells were cultured by adding raise cells,ConA or IL2 under the different concentration and at last the T cell clone were formed. Results A stable recipient against donor antigen-specific T cell clone was established. The difference among the different immune groups was very significant(tgt;t0.05). The T cell clone was not formed without raise cells or only with raise cells. The rare clone could be formed by ConA stimulation but without IL-2. The clone-forming rate was associated with concentration of IL-2. ConclusionThe mature T cell is able to proliferate to form clone when the condition is suitable. The recipient is immunized with donor rats spleen cellular antigen. The T cells clones selected in the end are donor antigen-specific.

    Release date:2016-08-28 05:30 Export PDF Favorites Scan
  • EFFECT OF INDUCING DIFFERENATION OF ALL TRANS RETINOIC ACID ON IMMUNITY OF PATIENTS WITH GASTRIC CARCINOMA

    Objective To evaluate the effect of inducing differenation of all trans retinoic acid (ATRA) on immunologic function of patients with gastric cancer. Methods T-lymphocyte subsets(T-Ls) and interleukin-2 receptor(sIL-2R) of 56 patients with gastric cancer after treatment of ATRA were studied. Results In radical gastric cancer resection group, the serum CD3,CD4 and CD4/CD8 rate were higher and sIL-2R were lower than those in the control group, after treatment of ATRA, CD3,CD4 and CD4/CD8 rate and sIL2R were as high as those in the control group. In the non-operative or palliative gastric resection group, CD3,CD4 and CD4/CD8 rates were increased markedly and the serum sIL-2R was decreased significantly than those in the control group. Conclusion ATRA inducing differenation can improve the immunity of the patients with gastric cancer.

    Release date:2016-08-28 05:30 Export PDF Favorites Scan
  • EFFECTS OF TUMOR INFILTRATING LYMPHOCYTES ON CELLULAR IMMUNOLOGIC FUNCTION OF PATIENTS WITH BREAST CANCER

    【Abstract】Objective The effects of tumor infiltrating lymphocytes (TIL) on cellular immunologic function of patients with breast cancer were studied. Methods Twenty five patients with breast cancer were treated by the TIL that were isolated from tissue of tumor. T cell subgroups and natural killer cell (NK cell) activity of peripheral blood, the levels of serum soluble interleukin-2 receptor (sIL-2R) were assayed before and after treatment. Results CD3, CD4, CD4/CD8 and NK cell activity were ascended obviously, and CD8, sIL-2R were descended obviously after the treatment of TIL. Conclusion TIL can enhance the cellular immunologic function of patients with breast cancer.

    Release date:2016-08-28 05:30 Export PDF Favorites Scan
  • EFFECT OF INTRAPERITONEAL HYPERTHERMO-CHEMOTHERAPY ON T-LYMPHOCYTE SUBSETS AND sIL2R LEVEL IN PATIENTS WITH GASTROINTESTINAL MALIGNANCY TUMOR

    To evaluate the effect of intraperitoneal hyperthermo-chemotherapy (IPHC) on immunologic function of patients with gastrointestinal malignant tumor (GMT). The authors determined the serum T-lymphocyte subsets (T-LS) and interleukin-2 receptor (sIL-2R) of 32 patients with GMT after IPHC, and compared the two indexes with 20 healthy control group. Results: Before IPHC the serum CD+3, CD+4, CD+8 and CD+4/CD+8 were higher and sIL-2R were lower than control group, after IPHC, CD+3, CD+4, CD+8 and CD+4/CD+8 increased obviously (P<0.01) and the serum sIL-2R decreased significantly (P<0.01). Conclusion: The IPHC can improve the patients immunologic function.

    Release date:2016-08-29 09:18 Export PDF Favorites Scan
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