Serum interferon-gamma (IFN-gamma) in chronic oral candidosis

1998 ◽  
Vol 36 (5) ◽  
pp. 269-273
Author(s):  
SZKARADKIEWICZ ◽  
SZPONAR ◽  
KRZEMINSKA-JASKOWIAK ◽  
TUECKA
Keyword(s):  
Interferon Gamma ◽  
Ifn Gamma ◽  
Oral Candidosis

Serum interferon-gamma (IFN-gamma) in chronic oral candidosis

1998 ◽  
Vol 36 (5) ◽  
pp. 269-273
Author(s):  
SZKARADKIEWICZ ◽  
SZPONAR ◽  
KRZEMINSKA-JASKOWIAK ◽  
TUECKA
Keyword(s):  
Interferon Gamma ◽  
Ifn Gamma ◽  
Oral Candidosis

scholarly journals Interleukin 12 induces stable priming for interferon gamma (IFN-gamma) production during differentiation of human T helper (Th) cells and transient IFN-gamma production in established Th2 cell clones.

1994 ◽  
Vol 179 (4) ◽  
pp. 1273-1283 ◽  
Author(s):  
R Manetti ◽  
F Gerosa ◽  
M G Giudizi ◽  
R Biagiotti ◽  
P Parronchi ◽  
...  
Keyword(s):  
T Cells ◽  
Interferon Gamma ◽  
Specific Antigen ◽  
Th2 Cells ◽  
Interleukin 12 ◽  
T Helper ◽  
Ifn Gamma ◽  
Selection Of

Interleukin 12 (IL-12) facilitates the generation of a T helper type 1 (Th1) response, with high interferon gamma (IFN-gamma) production, while inhibiting the generation of IL-4-producing Th2 cells in polyclonal cultures of both human and murine T cells and in vivo in the mouse. In this study, we analyzed the effect of IL-12, present during cloning of human T cells, on the cytokine profile of the clones. The culture system used allows growth of clones from virtually every T cell, and thus excludes the possibility that selection of precommitted Th cell precursors plays a role in determining characteristics of the clones. IL-12 present during the cloning procedures endowed both CD4+ and CD8+ clones with the ability to produce IFN-gamma at levels severalfold higher than those observed in clones generated in the absence of IL-12. This priming was stable because the high levels of IFN-gamma production were maintained when the clones were cultured in the absence of IL-12 for 11 d. The CD4+ and some of the CD8+ clones produced variable amounts of IL-4. Unlike IFN-gamma, IL-4 production was not significantly different in clones generated in the presence or absence of IL-12. These data suggest that IL-12 primes the clone progenitors, inducing their differentiation to high IFN-gamma-producing clones. The suppression of IL-4-producing cells observed in polyclonally generated T cells in vivo and in vitro in the presence of IL-12 is not observed in this clonal model, suggesting that the suppression depends more on positive selection of non-IL-4-producing cells than on differentiation of individual clones. However, antigen-specific established Th2 clones that were unable to produce IFN-gamma with any other inducer did produce IFN-gamma at low but significant levels when stimulated with IL-12 in combination with specific antigen or insoluble anti-CD3 antibodies. This induction of IFN-gamma gene expression was transient, because culture of the established clones with IL-12 for up to 1 wk did not convert them into IFN-gamma producers when stimulated in the absence of IL-12. These results suggest that Th clones respond to IL-12 treatment either with a stable priming for IFN-gamma production or with only a transient low level expression of the IFN-gamma gene, depending on their stage of differentiation.

Interferon-gamma downregulates CFTR gene expression in epithelial cells

1994 ◽  
Vol 267 (5) ◽  
pp. C1398-C1404 ◽  
Author(s):  
F. Besancon ◽  
G. Przewlocki ◽  
I. Baro ◽  
A. S. Hongre ◽  
D. Escande ◽  
...  
Keyword(s):  
Gene Expression ◽  
Interferon Gamma ◽  
Posttranscriptional Regulation ◽  
Bacterial Infections ◽  
Cftr Gene ◽  
Mrna Levels ◽  
Dependent Manner ◽  
Necrosis Factor Alpha ◽  
Ifn Gamma ◽  
Cl Transport

Cystic fibrosis (CF) is caused by mutations in the CF transmembrane conductance regulator (CFTR) gene, resulting in defective transepithelial Cl- transport. The regulation of CF gene expression is not fully understood. We report that interferon-gamma (IFN-gamma), but not IFN-alpha or -beta, downregulates CFTR mRNA levels in two colon-derived epithelial cell lines, HT-29 and T84, in a time- and concentration (from 0.1 IU/ml)-dependent manner. IFN-gamma has no effect on the transcription rate of the CFTR gene but reduces CFTR mRNA half-life, indicating that it exerts a posttranscriptional regulation of CFTR expression, at least partly, through destabilization of the transcripts. Cells treated with IFN-gamma contain subnormal amounts of 165-kDa CFTR protein. Assays of adenosine 3',5'-cyclic monophosphate-stimulated 36Cl- efflux and whole cell currents show that CFTR function is diminished in IFN-gamma-treated cells. IFN-gamma and tumor necrosis factor-alpha synergistically reduce CFTR gene expression. Our results suggest that production of these cytokines in response to bacterial infections and inflammatory disorders may alter transmembrane Cl- transport.

scholarly journals Dysregulation of interleukin 4, interleukin 5, and interferon gamma gene expression in steroid-resistant asthma.

1995 ◽  
Vol 181 (1) ◽  
pp. 33-40 ◽  
Author(s):  
D Y Leung ◽  
R J Martin ◽  
S J Szefler ◽  
E R Sher ◽  
S Ying ◽  
...  
Keyword(s):  
Gene Expression ◽  
Binding Affinity ◽  
Interferon Gamma ◽  
Messenger Rna ◽  
Oral Prednisone ◽  
Interleukin 2 ◽  
Interleukin 4 ◽  
Cytokine Gene Expression ◽  
Ifn Gamma ◽  
Steroid Resistant

In steroid-resistant (SR) asthma, there is a lack of clinical responsiveness to oral prednisone. Previous studies indicate that this may be explained by the effect of the combination of interleukin 2 (IL-2) and IL-4 on glucocorticoid receptor binding affinity. By contrast, steroid-sensitive (SS) asthmatics respond well to glucocorticoids, and this is accompanied by a decrease in the numbers of bronchoalveolar lavage (BAL) messenger RNA+ (mRNA+) cells expressing IL-4 and IL-5, and an increase in interferon gamma (IFN-gamma) transcripts. In the present study, we hypothesized that SR asthma is associated with alterations in T helper types 1/2 (Th2/Th1)-type cytokine gene expression. BAL was performed in six SR asthmatics and six SS asthmatics, before and after a 1-wk course of 40 mg daily prednisone. mRNA+ cells for IL-2, IL-4, IL-5, and IFN-gamma was measured by in situ hybridization using 35S-labeled RNA probes. Before prednisone therapy, there were significantly greater numbers of BAL cells (per 1,000) expressing IL-2 mRNA (p < 0.01) and IL-4 mRNA (p < 0.05) in SR asthmatics as compared with SS asthmatics, but no differences between the two groups in the numbers of BAL cells expressing IFN-gamma or IL-5 mRNA expression were observed. After a 1-wk course of prednisone, IL-2 expression was not altered in either group. However, SS asthmatics had a significant decrease in the numbers of BAL cells expressing mRNA for IL-4 (p < 0.01) and IL-5 (p < 0.001), and a rise in the numbers of IFN-gamma mRNA+ cells (p < 0.01). In contrast, after prednisone treatment, SR asthmatics had no significant change in either the number of BAL cells expressing mRNA for IL-4 or IL-5. Of note, there was an unexpected decrease in the numbers of IFN-gamma mRNA+ cells (p = 0.05). Our current findings indicate that SR asthma is associated with a dysregulation of the expression of the genes encoding for Th2/Th1 cytokines in airway cells and is compatible with the concept that a combination of IL-2 and IL-4 induce glucocorticoid (GR) binding affinity and T cell responsiveness to glucocorticoids.

scholarly journals Anti-inflammatory activity of released-active antibodies to interferon-gamma, CD4-receptor, and histamine against respiratory-syncytial viral infection

2019 ◽  
pp. 85-89
Author(s):  
А.Г. Емельянова ◽  
С.А. Тарасов ◽  
С.Г. Морозов
Keyword(s):  
Interferon Gamma ◽  
Inflammatory Cells ◽  
Negative Control ◽  
Ifn Gamma ◽  
Cd4 Receptor ◽  
Cause Of Deaths ◽  
Prophylactic Use ◽  
Syncytial Virus ◽  
One Year

Актуальность. Респираторно-синцитиальный вирус (РСВ) вызывает наиболее опасные инфекции у детей, особенно до 1 года, являясь основной причиной смертельных исходов, и способствует развитию бронхиальной астмы. Эффективной терапии в отношении вызываемой им инфекции не существует, а меры профилактики ограничены. Перспективным может быть использование препаратов на основе релиз-активных антител (РА АТ), действие которых направлено на иммунные реакции организма. Целью работы являлось изучение эффектов РА АТ к ИФН-гамма, CD4-рецептору и гистамину при РСВ-инфекции in vivo при их профилактическом введении. Методы. Мышей линии Balb/c инфицировали интраназально РСВ в дозе 5 × 106 ТЦД50/мышь, в течение 5 суток до инфицирования животным вводили РА АТ к ИФН-гамма, CD4-рецептору и гистамину, или отрицательный контроль (вода очищенная). Через 6 суток после инфицирования оценивали инфильтрацию клеток воспаления в дыхательные пути. Результаты. РА АТ к ИФН-гамма, CD4-рецептору и гистамину статистически значимо (p < 0,05) снижают общую инфильтрацию клеток воспаления в легкие, а также уровень лимфоцитов и макрофагов по сравнению с контрольными группами. Заключение. Профилактическое применение РА АТ к ИФН-гамма, CD4-рецептору и гистамину способствует снижению выраженности воспаления дыхательных путей экспериментальных животных, зараженных РСВ. Background. Respiratory syncytial virus (RSV) causes the most dangerous infections in children, especially those under one year, being the main cause of deaths and contributing to the development of bronchial asthma. There is no effective treatment for the causative infection, and preventive measures are limited. The use of drugs based on released-active antibodies (RA Abs) that target the immune response may be promising. Aim. The aim of the work was to study preventive effects of RA Abs to interferon-gamma (IFN-gamma), CD4 receptor, and histamine on RSV infection in vivo. Methods Balb /c mice were infected with RSV intranasally at a dose of 5 × 106 TCID50 per mouse. For 5 days prior to infection, RA Abs to IFN-gamma, CD4 receptor, and histamine or the negative control (purified water) were intragastrically administered to the animals. Infiltration of inflammatory cells into the respiratory tract was evaluated 6 days after infection. Results. RA Abs to IFN-gamma, CD4 receptor, and histamine significantly (p < 0.05) reduced the total infiltration of inflammatory cells into the lungs, as well as levels of lymphocytes and macrophages compared with the control groups. Conclusion. The prophylactic use of RA Abs to IFN-gamma, CD4 receptor, and histamine helps to alleviate severity of airway inflammation in experimental animals infected with RSV.

scholarly journals Human recombinant interferon gamma enhances neonatal polymorphonuclear leukocyte activation and movement, and increases free intracellular calcium.

1991 ◽  
Vol 173 (3) ◽  
pp. 767-770 ◽  
Author(s):  
H R Hill ◽  
N H Augustine ◽  
H S Jaffe
Keyword(s):  
Intracellular Calcium ◽  
Interferon Gamma ◽  
Messenger Rna ◽  
Intrinsic Defect ◽  
Mononuclear Leukocytes ◽  
Developmental Defect ◽  
Phagocytic Cells ◽  
Ifn Gamma ◽  
Recombinant Interferon ◽  
Free Intracellular Calcium

In previous studies, we have reported that after chemotactic factor stimulation, PMNs from neonates fail to undergo certain critical activation steps. Furthermore, the concentration of free intracellular calcium reached is significantly below that of PMNs from adults. Interferon-gamma (IFN-gamma) is a lymphokine that has been shown to activate phagocytic cells, and IFN-gamma messenger RNA production by neonatal mononuclear leukocytes has been reported to be depressed. In the present studies, we found that recombinant human IFN-gamma markedly enhanced the chemotactic responses of PMNs from neonates to levels that were not different from that of PMNs from adults. Furthermore, preincubation of the neonatal cells with this recombinant human lymphokine also corrected the abnormality in intracellular calcium metabolism. These results suggest that this developmental defect in phagocytic cell movement may be the result of an intrinsic defect in IFN-gamma production resulting in deficiency of this critical phagocyte-activating lymphokine.

scholarly journals Involvement of P-glycoprotein in the transmembrane transport of interleukin-2 (IL-2), IL-4, and interferon-gamma in normal human T lymphocytes

Blood ◽  
1996 ◽  
Vol 88 (5) ◽  
pp. 1747-1754 ◽  
Author(s):  
J Drach ◽  
A Gsur ◽  
G Hamilton ◽  
S Zhao ◽  
J Angerler ◽  
...  
Keyword(s):  
T Lymphocytes ◽  
Interferon Gamma ◽  
T Cell Activation ◽  
Interleukin 2 ◽  
Rhodamine 123 ◽  
Enzyme Linked Immunosorbent Assay ◽  
Ifn Gamma ◽  
Human T Lymphocytes ◽  
P Glycoprotein ◽  
Normal Human

Abstract The physiological role of the multidrug resistance P-glycoprotein (P- gp), which is expressed by normal human T lymphocytes, is still largely unknown. To investigate whether or not P-gp is involved in the transport of cytokines, peripheral blood lymphocytes were stimulated with phytohemagglutinin (PHA) in the absence or presence of P-gp inhibitors, and concentrations of cytokines (interleukin-2 [IL-2], IL- 4, IL-6, interferon-gamma [IFN-gamma]) in the supernatants of these cultures were quantitated by enzyme-linked immunosorbent assay. P-gp inhibitors included verapamil (Ver), tamoxifen (Tmx), and the P-gp specific monoclonal antibody UIC2. Release of IL-2 was significantly suppressed by these inhibitors at concentrations that were also effective in blocking efflux of Rhodamine-123 from normal T lymphocytes. IL-2 mRNA expression in lymphocytes was not different between PHA control and the cultures with P-gp inhibitors. Ver and Tmx did not interfere with T-cell activation as determined by CD25 and CD69 expression. In a nonhematological model, the P-gp expressing HCT-8 adenocarcinoma cell line, exogenously added IL-2 was shown to exert an inhibitory effect on P-gp mediated Rhodamine-123 efflux. In addition, transepithelial transport of IL-2 by electrophysiologically tight and polarized HCT-8 monolayers was examined. A time-dependent flux of IL-2 across dense monolayers, which was partially inhibited by Ver, was observed. We also investigated whether or not P-gp inhibitors suppressed release of other cytokines produced by activated T cells (IL- 4, IL-6, IFN-gamma). Release of IL-4 and IFN-gamma was significantly inhibited by Ver, Tmx, and UIC2; however, release of IL-6 remained unaffected. These data show P-gp mediated transmembrane flux of IL-2 in T lymphocytes and HCT-8 cells. We conclude that P-gp participates in the transport of cytokines (IL-2, IL-4, and IFN-gamma) in normal peripheral T lymphocytes.

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