IFN -r Enhances Induction of Chemokines Mig and IP10 mRNA from THP - 1 Cells Stimulated with Lipoarabinomannan / 대한면역학회지

Lipoarabinomannans (LAM) is believed as a potential virulence factor of Mycobacterium tuberculosis. LAM exhibits marked differences in biological activities depending on the types, arabinofuranosyl-terminated LAM (AraLAM) derived from a rapidly growing Mycobacterium sp. and heavily mannosylated LAM (ManLAM) derived from the Erdman strain. Collaboration between macrophages and T cells, especially macrophage activation by gamma interferon (IFN-r) and chemoattraction of T cells at the very inflammatory foci would be essential in defence against M. tubercu/osis. Chemokines Mig and IP-10 are inducible by IFN-r from macrophages and have been shown to act in vitro as T cell chemoattractants. However, little is known of LAMs capacity to induce chemokines Mig and IP-10 in macrophages. In this experiment, Mig and IP10 mRNA was expressed in the delayed-type hypersensitivity (DTH) against BCG in BCG-immune mice. In some experiments, both Mig and IP-10 mRNA was evidently induced with different time courses in THP-1 cells stimulated with whole live M. tubercu/osis H37Rv (Erdman). To investigate whether Mig and IP-10 genes are differentially induced depending on the type of LAM, PCR amplification was used to detect mRNA of Mig and IP-10 from the THP-1 human monocytic cells stimulated with LAM. AraLAM, but not ManLAM, induced weakly Mig and IP-10 mRNA in the THP-1 cells. The induction of Mig and IP-10 was dependent upon the dose of AraLAM and exhibited different time courses. The mRNA for Mig and IP-10 was induced within 2 hr and 4 hr from the initiation of treatrnent and has disappeared by 8 hr and 24 hr under the experimental conditions used in this study, respectively. IFN-y at 100 U/ml, but not at 10 U/ml, was itself a good stimulus of both Mig and IP- 10 expression, and synergized with either AraLAM or ManLAM for induction of both Mig and IP-10. The expression patterns of MCP-3 were somewhat similar to those of Mig and IP10 in all of the experiments. These data indicate that IFN-r may contribute to effective macrophage function if macrophages are not fully affected by ManLAM, and chemokines Mig and IP-10 may a role in recruitment of T cells at inflammatory foci of tuberculosis.

The Effect of Ultraviolet lrradiation on Susceptibility of Listeria monocytogenes lnfection and the Production of Cytokines / 대한면역학회지

Although the effect of ultraviolet (UV) irradiation on immune response was reported to supress cellular immune response, the exact mechanism was not elucidated. As recent development in cytokine research progress, it is well-known that immune response is regulated by cytokines and especially cellular immune response is induced by interferon (IFN)-r and interleukin (IL)-12 which is mainly produced from lymphocytes and macrophages respectively. Therefore our purpose was to elucidate the UV effect on cellular immune response and its mechanism. We have investigated the changes of host resistance by injection of Listeria monocytogenes which is an intracellular parasite after UVB irradiation in C57BL/6 mice which is known to have relatively strong cellular immune response. In addition we also have investigated the changes in the production of IFN-r from lymphocytes and the production of tumor necrosis factor (TNF)-a and IL-12 from macrophages in mice by UVB irradiation. The increase of mouse spleen index and susceptibility of iisteria monocytogenes infection was correlated with the decreased production of IFN-r, TNF-a and IL-12, which was known to induce the suppression of cellular imrnune response.

Tumor Necrosis Factor-alpha and Interferon-r Secretory Capacity of Mononuclear Leukocytes after Incubation in Patient with Acute Myocardial Infarction

BACKGROUND: Studies of human coronary plaque specimens have shown that T lymphocytes and macrophages are present in all types of lesions, from fatty streaks to advanced plaques. There is growing evidence for a pathogenic role for immune response in progression of atherosclerosis. This study was designed to investigate cytokine production by mononuclear leukocytes from patients with myocardial infarction. METHOD: We measured the kinetics of secretion of tumor necrosis factor-alpha (TNF-alpha) and interferon-r (IFN-r) by mononuclear leukocytes from 8 control subjects and 12 patients with acute myocardial infarction. Mononuclear leukocytes were isolated and incubated with plant lectin mitogen concanavalin-A for 24 and 48 hours. TNF-alpha and IFN-r secretions were measured by ELISA. RESULTS:There were no significant differences between TNF-alpha and IFN-r secretions by mononuclear leukocytes at and before 24 hours of incubation from both patients and control subjects, but TNF-alpha and IFN-r secretions at 48 hours of incubation were higher (p<0.005, p<0.05) in patients when compared with control subjects. TNF-alpha and IFN-r secretions by mononuclear leukocytes after incubation correlated with the peak level of creatine phosphokinase (CK) and CK-MB. CONCLUSION: Increased cytokine secretory capacity of mononuclear leukocytes may be due to the acute inflammatory response of myocardial infarction. Further trials may be needed to determined the effects of increase in secretory capacity of mononuclear leukocytes before myocardial infarction.

Isolation and Characterization of Tumor Cell - Derived Immunoregulatory Factors / 대한면역학회지

It has been known that the immunological functions against cancer cells were diminished, and these phenomena result from the inhibition of cell-mediated immunity by substance(s) secreted from cancer cells. It was also reported that the immunological functions decreased in patients with stomach cancer, which is the most frequent cnacer in Korean. However, the nature and function of the inhibitory factor(s) orignated from stomach cancer have not been identified. To elucidate effects of immuological inhibitory factor(s) secreted from cancer cells, SNU-1 (stomach cancer) and SW480 P109/R3P2 (colon cancer) were used in this study. Jurkat T cell line, an acute T cell leukemia, was pre-incubated with fractionated cancer cell culture supernatant for 3 days, then was stimulated with PMA, PWVanti-CD28 mAb or PMA/ionomycin for 8 hrs respectively. Fraction of SNU-1 (3 - 10 kDa) and above 10 kDa of SW480 P109/R3P2 inhibited the expression of IFN-r mRNA when Jurkat T cell was stimulated with PMA. However, there were no difference in IL-2 and IL-4 gene expression response to either PMA/anti-CD28 mAb or PMA/ionomycin. These results show that cancer cells secret some inhibitory factor(s) acting on the immune response, especially IFN-r gene expression of the Jurkat T cells response to PMA. Therefore, it suggests that the inhibitory factor(s) secreted from cancer cells influences on. the PKC-dependent pathway related to the signal transduction by PMA.

Th1 Cytokine ( IFN-gamma ) Secretion Pattern of Peripheral Blood Mononuclear Cells Response to Trophoblast Antigen in Women with Unexplained Recurrent Spontaneous Abortion and Normal Fertile Controls / 대한산부인과학회잡지

OBJECTIVE: A dichotomous Thl and Th2 cytokine profile has been associated with reproductive failure and success, respectively. The purpose of our study was to determine the levels of Thl cytokine (IFN- y ) secreted by peripheral blood mononuclear cells (PBMCs) form women with unexplained recurrentabortion (URA) and fertile controls in response to trophoblast antigen. METHODS: PBMCs were isolated from 30 nonpregnant women with URA and from 10 nonpregnant fertile controls. Following 4 days of culture (1 * 10(6) cells/mL) with and without a protein extract derived from a trophoblast cell line (30 ug/mL, protein). None of the women had allergies, atopy or recent infection. Cytokines were measured in supernatants with enzyme-linked immunosorbent assay (ELISA) kits. IFN- r kit was obtained from BOISOURCE (lower limit of sensitivity, 15.6 pg/mL for IFN- r ). All values below the lowest limit of sensitivity as determined by test kit standards were considered negative. The cytokine stimulation test is considered positive if the IFN- r concentration increases by 200% or more with the trophoblast antigen stimulation. Datas are presented as mean+ SEM. Nonparametric testing (Mann-Whitney U) was used for analysis with P<0.05 considered statistically significant. RESULTS: The Thl-type cytokine (IFN- r ) was detected in 20(67%) of 30 supernatants from women with URA. In contrast, 2 (20%) of trophoblast-activated PBMC culture supernatants from the 10 parus women with normal reproductive histories was detected IFN- r and but were significantly lower than levels in women with URA who had secreted IFN- r upon trophoblast stimulation (99.80+ 18.17 pg/mL versus 166.47 + 36.96 pg/mL, p<0.05). Spontaneous secretion of IFN- r was significantly higher in culture supernatants from women with URA than in supernatants from women with successful reproductive histories (41.36.09+6.99 pg/mL versus 25.89+9.34 pg/mL, p<0.05). CONCLUSION: These data indicate that there are significant differences between women with URA and women with normal reproductive histories in their regulation of the Thl-cytokine (IFN- r) in response to trophoblast. Thl-type immunity to trophoblast is associated with URA and may play a role in reproductive failure.

Effect of Cytokines on Expression of Intercellular Adhesion Molecule - 1 in Nasal Epithelial Cells / 대한면역학회지

Intexcellular adhesion molecule-10CAM- 1) is an important moleade in aehating immune and inflammatory responses. It is found on the surface of hematopoietic and nonhematopoietic cells. It can act as an adhesive ligand for integrins such as LFA-1 (CD1&/CD11a) and MAC-1 (CD18/ CD11b). ICAM-1 is basally expressed in sigaificant amount on a limited number of cell types, including monocytes and endothelial ceRs. But it is inducible or upregulated by INF-r, IL-1p and TNF-a on many cell types. IL-4, a pleiotropic cytokine and mast cell differentiation factor, is upregulated in human allergic disease and stimulates expression of vascular adhesion molecule-1 (VCAM-1) in endothelial cells. IL-4 also promotes expression of surhce ICAM-1 in human mast cells and dermal fidroblasts. So in allergic rhinitis and asthma, IL-4 may be an important cytokine implicated in the pathogenesis of inflammation. We studied the effect of INF-r and IL-4 on expression of ICAM-1 in human nasal epithelial cells (HNEC). HNEC were prepared by primary culture method of monolayer culture of dissociated cells hom human inferior nasal turbinate mucosa. Nasal mucosa were obtained by partial turbinectomy of septal deviation patients. Primary cultured cells were charaterized as an epithelial cell type by indirect immuno-fluorescence assay using antilmdies against cytokeratin-pan, cytokeratin No. 8, vimentin and von Willebrand factor. Using fluorescence activated cell sorter (Coulter EI1TE), we analyzed the quantitative expression of ICAM-1 on HNEC. Treatment of HNEC with IFN-r (1ng/ml) for 24 hours caused about 8 fold increase of the surface ICAM-1 compared with constitutive expression by mean fluorescence intensity (MIF) but IL-4 had little effect. Theses foundings suggest that IFN-r is a potent ICAM-1 inducer in HNEC and further studies are necessary for the role of IL-4 on HNEC.

Immunomodulators Extracted from Korean - style Fermented Soybean Paste and Their Function . 1 . Isolation of B Cell Mitogen from Korean - style Fermented Soybean Paste / 대한면역학회지

Responses of mouse lymphocytes to the soybean paste fermented by Korean traditional fashion was examined to clarify its effects in cytokine production in vitro. A fraction of the soybean paste (KFSP-100) was prepared by precipitation with ammonium sulfate and by filtration through ultrafiltration membrane. KFSP-100 were added into cultures of fresh mouse splenic cells in vitro. KFSP-100 significantly enhanced the amount of IL-6 and TNF-a produced by macrophages and IL-6 and IFN-r produced by lymphocytes. Production of IL-12 by macrophages was not much affected by KFSP-100 treatments. The most noticeable finding was the fact that lymphocytes treated with KFSP-100 proliferated to an exceeding numbers (more than 10 times to the control) in 72 hours. The KFSP-100-induced proliferative response was specific to B cells since almost all of the KFSP-100-induced cells in the cultures of splenic cells were B cells. Furthermore, such a proliferative responses were equally observed only in cultures of purified B cells but not in cultures of T cells. In thermostability test, the biologically active components of the KFSP-100 is assumed to be either linear protein or glycoprotein. KFSP-100 did not induce agglutination of lymphocytes demonstrated by lectins in the same cells. These observations suggest that KFSP-100 may be a novel mitogen for B lymphocytes. The component (s) responsible for the B cell proliferation in KFSP-100 might be a factor gained by natural fermentation. None of the fractions of not fermented soybean paste prepared by the same methods demonstrate the same effect.

Efficient Production of Retroviruses Encoding Human Costimulatory Molecule, B7 - 1 ( CD80 ) / 대한면역학회지

No abstract available.

The clicicopathological observations and detection of human papillomavirus in Koreans with Bowen"s disease / 대한피부과학회지

BACKGROUND: The main function of melanocyte is known to proiect the skin from hazardous sun-light. But, some investigators have claimed lately that melanocytes are also related to the immunologic role in the epidermis becauase these cells produce IL-1 activity and IL-lb convertase activity, in vitro. OBJECTIVE: Our purposee were to investigate the effects of rIFN-b on the proliferation of melanocytes, melanin content, and the expression of HLA-DR aritign on melanocytes after a rIFN-y exposure. MEHTODS: The number of melanocytes, the melanin content, and the expression of HLA-DR antigen were evaluated on culturect human melanocytes according to a time sequence and various concentrations of rIFN-y. RESULTS: Antiproliferative activity on melanocytes was dependent on the exposure time and the concentration of rIFN-r. According to the exposure time and the concentration of rIFN-r, melanogenic activity was inhibited or stimulated, Normal melanocytes didnt express HLA-DR antigen, but when normal melanocytes were exposed to rIFN-r, the expression of HLA-DR antigen increased in a timeand concentration-dependent fashion. After the removal of rIFN-r fiom the culture media the expression of HLA-DR antigen on melanocytes also disappeared. CONCLUSION: In our study, melanocytes seem to be related to the irnmunologic role in the epidermis because these cells expressed HLA-DR antigen after rIFN-r exposue and we think that study could help to investigate between melanocytes and immunalogic mechanisms in various inflammatory skin diseases.

Effect of suction blister fluid and IFN-gamma on HLA-A,B,C and HLA-DR espression in cultures human melanocytes / 대한피부과학회지

HLA-A, B, C and HLA-DR are very important in the regulation of immune response and of transplant success or failure, but there have been a few reports about F3I A expression in melanocyt.es, a minor population of cpidermal cells. In the treatment of stable or segmental vitiligo, allogeneic melanocytes graft could t)e potentially useful if rejection does not. occur. The aim of this study was to examine the expression of HI.A-A, B, C and HI.A-DR in cultured hurnan melanocytes with and without. stimulation by INF-r and suction blister fliid. All strains of cultured me- lanocytes expressed HLA-A, B, C regardless of stmulation, but HLA-DR was expressed only following stimulation of INI-r. HLA expression in me]anocytes appears to be similar to that in keratinocytes.

The effects of scoparone on the content of IL-4 and IFN-r in asthmatic guinea pigs / 中国药理学通报

AIM To study the changes of IgE, IL-4 and IFN-y in serum and pulmonary tissue homogenate of asthmatic guinea pigs and the effects of scoparone on them. METHODS To divide animals into three groups: control, asthma and scoparone treatment groups. Choose the model guinea pigs of asthma sensitized with OA, and observe the changes of IgE, IL-4 and IFN-r in serum and pulmonary tissue homogenate of asthmatic guinea pigs and the effects of scoparone on them by means of chemolumi nescence, radio immunoassay, enzyme-linked immunoabsordent assay. RESULTS IgE and IL-4 in serum and pulmonary tissue homoge-nate of asthmatic guinea pigs obviously increase (P