Kim, Kwang-Dong;Kim, Jin-Koo;Kim, Se-Jin;Choe, In-Seong;Chung, Tae-Hwa;Choe, Yong-Kyung;Lim, Jong-Seok
Archives of Pharmacal Research
/
v.22
no.4
/
pp.340-347
/
1999
Dendritic cells (DCs) are potent professional antigen-presenting cells (APC) capable of inducing the primary T cell response to antigen. Although tumor cells express target antigens, they are incapable of stimulating a tumor-specific immune response due to a defect in the costimulatory signal that is required for optimal activation of T cells. In this work, we describe a new approach using tumor-DC coculture to improve the antigen presenting capacity of tumor cells which does not require a source of tumor-associated antigen. Immunization of a weakly immunogenic and progressive tumor cocultured with none marrow-derived DCs generated an effective tumor vaccine. Immunization with the cocutured DCs was able to induce complete protectiv immunity against tumor challenges and was effective for the induction of tumor-specific CTL (cytotoxic T lymphocyte) activity. Furthermore, high NK cell activity was observed in mice in which tumors were rejected. In addition, immunization with tumor-pulsed DC s induced delayed tumor growth, but not tumor eradication in tumor-bearing mice. Our results demonstrate that coculture of DCs with tumors generated antitumor immunity due to the NK cell activation as well as tumor-specific T cell. This approach would be used for designing tumor vaccines using DCs when the information about tumor antigens is limited.
Background: T-cell mediated cellular immunity has been suggested as an important mechanism in mycobacterial infection and imbalance between helper/inducer and suppressor/cytotoxic T-cell has been suggested as an important immunological abnormality in the pathogenesis of tuberculosis in human. Method: To determine whether there is any difference in T-cell mediated immunity in the pathogenesis of pulmonary and extra pulmonary tuberculosis, total numbers of WBC&lymphocytes were counted and helper/inducer and suppressor/cytotoxic cells were calculated by flow cytometry. Blastogenesis after stimulation with Concanavalin-A, Phytohemagglutinin and PPD were measured by $^3H$-thymidine uptake. PPD skin test was performed as an in vivo test. Results: 1)There was no significant difference in the size of PPD skin test between pulmonary and extrapulmonary tuberculosis groups. 2)Number of total lymphocytes significantly decreased in tuberculosis patients compared with healthy control group. But there was no significant difference between pulmonary and extrapulmonary tuberculosis groups. 3) Number of HLA-DR and Interleukin-2 receptor (+) cells were significantly increased in tuberculosis patients. But there was no significant difference between pulmonary and extra pulmonary tuberculosis groups. 4) There was no significant difference in the numbers of WBC, $T_3$, $T_4$ and $T_8$ lymphocytes and $T_4/T_8$ ratio between tuberculosis patients and healthy controls. 5) There was no significant difference in the blastogenesis after stimulation with specific and non-specific blastogens between tuberculosis patients and healthy controls. 6) The percentage and absolute number of $T_4$ lymphocyte were significantly correlated with the size of PPD skin test. (r=0.689 and 0.598). Conclusion: From these results, it is concluded that there was no difference in T-cell mediated immunity between pulmonary and extra pulmonary tuberculosis group. But, because it is suspected that there might be some difference in the role of T-cell mediated immunity in the pathogenesis of pulmonary and extra pulmonary tuberculosis or even among the extrapulmonary tuberculosis patients, further studies would be required.
Background: Costimulation is a critical process in Ag-specific immune responses. Both B7.1 and CD28 molecules have been reported to stimulate T cell responses during antigen presentation. Therefore, we tested whether Ag-specific immune responses as well as protective immunity are influenced by coinjecting with B7.1 and CD28 cDNAs in a mouse HSV-2 challenge model system. Methods: ELISA was used to detect levels of antibodies, cytokines and chemokines while thymidine incorporation assay was used to evaluate T cell proliferation levels. Results: Ag-specific antibody responses were enhanced by CD28 coinjection but not by B7.1 coinjection. Furthermore, CD28 coinjection increased IgG1 production to a significant level, as compared to pgD+pcDNA3, suggesting that CD28 drives Th2 type responses. In contrast, B7.1 coinjection showed the opposite, suggesting a Th1 bias. B7.1 coinjection also enhanced Ag-specific Th cell proliferative responses as well as production of Th1 type cytokines and chemokines significantly higher than pgD+pcDNA3. However, CD28 coinjection decreased Ag-specific Th cell proliferative responses as well as production of Th1 types of cytokines and chemokine significantly lower than pgD+pcDNA3. Only MCP-1 production was enhanced by CD28. B7.1 coimmunized animals exhibited an enhanced survival rate as well as decreased herpetic lesion formation, as compared to pgD+pcDNA3. In contrast, CD28 vaccinated animals exhibited decreased survival from lethal challenge. Conclusion: This study shows that B7.1 enhances protective Th1 type cellular immunity against HSV-2 challenge while CD28 drives a more detrimental Th2 type immunity against HSV-2 challenge, supporting an opposite role of B7.1 and CD28 in Ag-specific immune responses to a Th1 vs Th2 type.
As a mood-altering drug, long-term alcohol consumption have significant harmful effects on the human body and people's mental functioning. This study observed that the suppression of cell mediated immunity induced in spleen of ICR mouse by long-term alcohol administration. After 8% alcohol voluntary administered for 120 days, the splenic tissue irnmunohistochemically stained by following ABC method that used monoclonal antibody including L3T4(CD4), Ly-2(CD8), IL-2 receptor(CD25R) and NK-1.1(CD56) after embedding with paraffin. The results were as follows. 1. The size of marginal zone in splenic white pulp was diminished and the number of macrophage in marginal zone was decreased in test group than control group. 2. After alcohol administration, the number of Helper T lymphocyte, cytotoxic T lymphocyte, and IL-2 receptor were decreased in periarterial lymphatic sheaths of white pulp and penicilla artery of red pulp and the degree of CD4, CD8, and CD25R positive reaction were soften. 3. In test group, the number of NK cell were decreased. These results indicated that the secretion of lymphokine as IL-2 was inhibited by long-term alcohol administration and subsequently prevent to activate and proliferate splenic T lymphocytes and NK cells as cell mediated immunity component.
Eun-Ju Ko;Youri Lee;Young-Tae Lee;Hye Suk Hwang;Yoonsuh Park;Ki-Hye Kim;Sang-Moo Kang
IMMUNE NETWORK
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v.20
no.6
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pp.51.1-51.17
/
2020
Respiratory syncytial virus (RSV) causes severe pulmonary disease in infants, young children, and the elderly. Formalin inactivated RSV (FI-RSV) vaccine trials failed due to vaccine enhanced respiratory disease, but the underlying immune mechanisms remain not fully understood. In this study, we have used wild type C57BL/6 and CD4 knockout (CD4KO) mouse models to better understand the roles of the CD4 T cells and cellular mechanisms responsible for enhanced respiratory disease after FI-RSV vaccination and RSV infection. Less eosinophil infiltration and lower pro-inflammatory cytokine production were observed in FI-RSV vaccinated CD4KO mice after RSV infection compared to FI-RSV vaccinated C57BL/6 mice. NK cells and cytokine-producing CD8 T cells were recruited at high levels in the airways of CD4KO mice, correlating with reduced respiratory disease. Depletion studies provided evidence that virus control was primarily mediated by NK cells whereas CD8 T cells contributed to IFN-γ production and less eosinophilic lung inflammation. This study demonstrated the differential roles of effector CD4 and CD8 T cells as well as NK cells, in networking with other inflammatory infiltrates in RSV disease in immune competent and CD4-deficient condition.
Objectives : To examine the effects of Gojineumja on white rats which deteriorated immunity caused by Methotrexate(MTX), first of all, MTX was fed to the rats once a day for 4 day. Methods : After the immune response of the rats are deteriorated, dried extracts of Gojineumja(GJE) mixed in water was fed to the white rats once a day for l4days. The next conclusion was made by examining the rates of B-cells and T-cells of the peripheral blood and the changes in rates of CD4+ T-cells and CD8+ T -cells of the blood sampled from the spleen and peripheral region. Especially the count of CD3+ CD4+ T-cells of the peripheral blood and the count of CD3+ CD4+ T-cells of the spleen the count of CD4+/ CD8+ T-cell of the peripheral blood and the spleen proved the significant effect of increasing immune responses statistically. Results :(1) The following are the summary of the results. (2) The percentage of B lymphocyte of peripheral blood was increased significantly in GJE group as compared with control group. (3) The percentage of CD3+ CD4+ T-cell of peripheral blood was increased significantly in GJE group as compared with control group. (4) The percentage of CD3+ CD8+ T-cell of peripheral blood was not different statistically. (5) The percentage of CD4+/ CD8+ T-cell of peripheral blood was increased significantly in GJE group as compared with control group. (6) The percentage of CD3+ CD4+ T-cell of spleen was increased significantly in GJE group as compared with control group. (7) The percentage of CD3+ CD8+ T-cell was not different statistically. (8) The percentage of CD4+ /CD8+ T-cell was not different statistically. Conclusions : Gojineumja has an effect of increasing immune responses on white rats with deteriorated immunity caused by MTX.
Journal of Physiology & Pathology in Korean Medicine
/
v.20
no.6
/
pp.1576-1583
/
2006
In order to investigate the effect of Goamshimshinhwan(GASSW) on SD rats with deteriorated immunity caused by methotrexate. Methotrexate was fed to the SD rats once a day for 4 days. After the immune responses of the at a dosage 1,000, 500 and 250mg/kg/10ml. and the changes on body weight and gains, spleen weight, total blood leukocyte numbers, total lymphocyte numbers, the percentage of B-cell, T-cell, CD3+CD+4 T-cell, CD3+CD8+ T-cell and CD4+/CD8+ T-cell ratios in the bolld and spleen were observed. In addition, the serum IL-2 levels and productivity of IL-2 of splenic cells were also demonstrated in this study. The changes on body weight were increased significantly in 100 and 500mg/kg of GASSW groups and the changes on body gain were increased significantly in 1000mg/kg of GASSW groups as compared with control group. The changes on the spleen weight (absolutely or relatively) were increased significantly in all GASSW groups as compared with control group. The total blood leukocyte numbers were increased significantly in 1000 and 500mg/kg of GASSW groups as compared with control group. The total lymphocyte numbers were increased significantly in all GASSW groups in the blood and increased significantly in 1000 and 500mg/kg of GASSW goups in spleen as compared with control group. The percentage of B-cell and T-cell were increased significantly in 1000mg/kg of GASSW groups in the blood and increased significantly in 1000 and 500mg/kg of GASSW groups in spleen as compared with control group. The percentage of CD3+CD4+ T-cell and the serum IL-2 levels and productivity of IL-2 of splenic cells were increased significantly in 100 and 500 mg/kg of GASSW groups in the blood and spleen as compared with control group. The percentage of CD3+CD8+ T-cell were increased significantly in 1000mg/kg of GASSW groups only in spleen as compared with control groups. The CD4+/CD8+ T-cell ratios were increased significantly in 1000 and 500mg/kg of GASSW groups only in the blood as compared with control group. Goamshimshinhwan(GASSW) has immuno-stimulating effect on SD rats with deteriorated immunity caused by methotrexate.
The conceptus which are resulted by mating between two genetically non-identical partners can be considered to be an allograft to the mother science which is not rejected by the mother's immunological attack. The present studies have been, therefore, attempted in order to elucidate the mechanism by which protection of the fete-placental allograft, between the C3H/HeJ female mouse and DBA/2 male mouse occurred. For this purpose, firstly systemic immunity was investigated by measuring T and B lymphocytes subsets. Natural killer cell activity in maternal splenic tissue and by observing the effects of pregnancy serums, progesterone and hCG on immune systems. Secondly, local immunity also investigated by measuring T lymphocytes subsets, natural killer cell activity in lymph nodes draining the uterus. The subsets of Thy-1.2$^+$ cells and L 3T4$^+$ cells decreased slightly while the subsets of Ly2$^+$ cell increased significantly compared with those of the control group beyond the mid-gestational stage. The subsets of B cell gradually in-creased from the mid-gestational stage untill delivery. The natural killer cell activity in the maternal splenic tissue significantly increased during the period of 5th to 8th day of gestation. The natural killer cell activity was significantly suppressed by the pregnancy serums and non-pregnant serums compared with those of serum-free group. The treatment of hCG significantly suppressed natural killer cell activity in the dose dependent manner (1 unit/ml-1000 unit/ml) while pro-gesterone increased the natural killer cell activity at phamarcological dose only. In the lymph nodes draining the uterus, the subsets of Thy-1.2$^+$ cells significantly increased during the period of implantation and L3T4$^+$ cell subsets slightly increased during the mid-gestational stage. The subsets of Ly2$^+$ cell increased significantly during the mid-gestational stage, but decreasing slightly be-fore delivery. The natural killer cell activity was significantly elevated after the implantation period in the lymph nodes draining the uterus. The natural killer cell activity of the lymph nodes draining the uterus was higher than those of splenic tissue during the same periods of gestation. It is therefore, concluded that during the pregnancy, the phenomena which the fete-placental allograft has not been rejected and rather protected from the maternal immunological attack might be due to local immune suppression in fete-maternal interface tissues rather than systemic immune suppression. And the subsets of Thy-1.2$^+$ cells and L3T4$^+$ cells mainly contribute to accepting allograft in early stage of pregnancy, while the subsets of Ly2$^+$ cell and the subsets of B cell increased significantly compared with those of the control group beyond the mid-gestational stage, so their role in systemic immunity and local immunity gradually increased from the mid-gestational stage until delivery.
Understanding the developmental mechanisms of humoral immunity against intranasal antigens is essential for the development of therapeutic approaches against air-borne pathogens as well as allergen-induced pulmonary inflammation. Follicular helper T (Tfh) cells expressing CXCR5 are required for humoral immunity by providing IL-21 and ICOS costimulation to activated B cells. However, the regulation of Tfh cell responses against intranasal antigens remains unclear. Here, we found that the generation of Tfh cells and germinal center B cells in the bronchial lymph node against intranasal proteinase antigens was independent of $TGF-{\beta}$. In contrast, administration of STAT3 inhibitor STA-21 suppressed the generation of Tfh cells and germinal center B cells. Compared with wild-type OT-II T cells, STAT3-deficient OT-II T cells transferred into recipients lacking T cells not only showed significantly reduced frequency Tfh cells, but also induced diminished IgG as well as IgE specific for the intranasal antigens. Cotransfer study of wild-type OT-II and STAT3-deficient OT-II T cells revealed that the latter failed to differentiate into Tfh cells. These findings demonstrate that T cell-intrinsic STAT3 is required for the generation of Tfh cells to intranasal antigens and that targeting STAT3 might be an effective approach to ameliorate antibody-mediated pathology in the lung.
Park, Jung-Sun;Park, Soo-Young;Cho, Hyun-Il;Sohn, Hyun-Jung;Kim, Tai-Gyu
IMMUNE NETWORK
/
v.11
no.3
/
pp.182-189
/
2011
Background: Cytotoxic T lymphocytes (CTLs) appear to play an important role in the control and prevention of human cytomegalovirus (HCMV) infection. The pp65 antigen is a structural protein, which has been defined as a potential target for effective immunity against HCMV infection. Incorporation of an 11 amino acid region of the HIV TAT protein transduction domain (Tat) into protein facilitates rapid, efficient entry into cells. Methods: To establish a strategy for the generation of HCMV-specific CTLs in vitro, recombinant truncated N- and C-terminal pp65 protein (pp65 N&C) and N- and C-terminal pp65 protein fused with Tat (Tat/pp65 N&C) was produced in E.coli system. Peripheral blood mononuclear cells were stimulated with dendritic cells (DCs) pulsed with pp65 N&C or Tat/pp65 N&C protein and immune responses induced was examined using IFN-${\gamma}$ ELISPOT assay, cytotoxicity assay and tetramer staining. Results: DCs pulsed with Tat/pp65N&C protein could induce higher T-cell responses in vitro compared with pp65N&C. Moreover, the DCs pulsed with Tat/pp65 N&C could stimulate both of $CD8^+$ and $CD4^+$ T-cell responses. The T cells induced by DCs pulsed with Tat/pp65 N&C showed higher cytotoxicity than that of pp65-pulsed DCs against autologous lymphoblastoid B-cell line (LCL) expressing the HCMV-pp65 antigen. Conclusion: Our results suggest that DCs pulsed with Tat/pp65 N&C protein effectively induced pp65-specific CTL in vitro. Tat fusion recombinant protein may be useful for the development of adoptive T-cell immunotherapy and DC-based vaccines.
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