Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 1.493
Filter
1.
An. bras. dermatol ; 96(4): 416-421, July-Aug. 2021. tab, graf
Article in English | LILACS | ID: biblio-1285085

ABSTRACT

Abstract Background: Interferon (IFN)-λ1, also named Interleukin (IL)-29, is a new member of the Type III IFN or IFN-λ family. IL-29 plays an important role in the pathogenesis of many types of autoimmune and inflammatory diseases. Objective: To study the role of IL-29 in the pathogenesis of psoriasis vulgaris. Methods: The authors detected the serum levels of IL-29 in forty-one patients with psoriasis vulgaris, twenty-three patients with atopic dermatitis and thirty-eight age and gender-matched controls by sandwich Enzyme-Linked Immunosorbent Assay (ELISA). The effects of IL-29 on the expression of cytokines, such as IL-6, IL-17, IL-8, IL-4, IL10, Interferon (IFN-γ) and Tumor Necrosis Factor-α (TNF-α), in PBMCs and HaCat cells were determined by real-time quantitative PCR. Results: Our data indicated that serum IL-29 levels were significantly elevated in patients with psoriasis vulgaris when compared with atopic dermatitis patients and the control group. Moreover, Serum levels of IL-29 were closely associated with the severity of psoriasis vulgaris. Furthermore, IL-29 up-regulated the mRNA expression levels of IL-6, IL-17 and TNF-α in PBMCs from psoriasis vulgaris patients. In addition, IL-29 enhanced the IL-6 and IL-8 expression from the HaCat cells. Conclusion: This study provides the first observations on the association of IL-29 and psoriasis vulgaris and showed elevated IL-29 serum levels. The authors suggest that IL-29 may play a role in the pathogenesis of psoriasis vulgaris.


Subject(s)
Humans , Psoriasis , Interferon-gamma , Leukocytes, Mononuclear , Cytokines , Interleukins , Interferons
2.
Chinese Medical Journal ; (24): 194-204, 2021.
Article in English | WPRIM | ID: wpr-921247

ABSTRACT

BACKGROUND@#Despite improvements in disease diagnosis, treatment, and prognosis, breast cancer is still a leading cause of cancer death for women. Compelling evidence suggests that targeting cancer stem cells (CSCs) have a crucial impact on overcoming the current shortcomings of chemotherapy and radiotherapy. In the present study, we aimed to study the effects of T cells and a critical anti-tumor cytokine, interferon-gamma (IFN-γ), on breast cancer stem cells.@*METHODS@#BALB/c mice and BALB/c nude mice were subcutaneously injected with 4T1 tumor cells. Tumor growth and pulmonary metastasis were assessed. ALDEFLOUR™ assays were performed to identify aldehyde dehydrogenasebright (ALDHbr) tumor cells. ALDHbr cells as well as T cells from tumor-bearing BALB/c mice were analyzed using flow cytometry. The effects of CD8+ T cells on ALDHbr tumor cells were assessed in vitro and in vivo. The expression profiles of ALDHbr and ALDHdim 4T1 tumor cells were determined. The levels of plasma IFN-γ were measured by enzyme-linked immunosorbent assay, and their associations with the percentages of ALDHbr tumor cells were evaluated. The effects of IFN-γ on ALDH expression and the malignancy of 4T1 tumor cells were analyzed in vitro.@*RESULTS@#There were fewer metastatic nodules in tumor-bearing BALB/c mice than those in tumor-bearing BALB/c nude mice (25.40 vs. 54.67, P < 0.050). CD8+ T cells decreased the percentages of ALDHbr 4T1 tumor cells in vitro (control vs. effector to target ratio of 1:1, 10.15% vs. 5.76%, P < 0.050) and in vivo (control vs. CD8+ T cell depletion, 10.15% vs. 21.75%, P < 0.001). The functions of upregulated genes in ALDHbr 4T1 tumor cells were enriched in the pathway of response to IFN-γ. The levels of plasma IFN-γ decreased gradually in tumor-bearing BALB/c mice, while the percentages of ALDHbr tumor cells in primary tumors increased. IFN-γ at a concentration of 26.68 ng/mL decreased the percentages of ALDHbr 4T1 tumor cells (22.88% vs. 9.88%, P < 0.050) and the protein levels of aldehyde dehydrogenase 1 family member A1 in 4T1 tumor cells (0.86 vs. 0.49, P < 0.050) and inhibited the abilities of sphere formation (sphere diameter <200 μm, 159.50 vs. 72.0; ≥200 μm, 127.0 vs. 59.0; both P < 0.050) and invasion (89.67 vs. 67.67, P < 0.001) of 4T1 tumor cells.@*CONCLUSION@#CD8+ T cells and IFN-γ decreased CSC numbers in a 4T1 mouse model of breast cancer. The application of IFN-γ may be a potential strategy for reducing CSCs in breast cancer.


Subject(s)
Aldehydes , Animals , Breast Neoplasms , Cell Line, Tumor , Female , Humans , Interferon-gamma , Mice , Mice, Inbred BALB C , Mice, Nude , Neoplastic Stem Cells
3.
Article in Chinese | WPRIM | ID: wpr-880176

ABSTRACT

OBJECTIVE@#To investigate the changes in function of CD8@*METHODS@#Flow cytometry was used to detect the expressions of PD-1, TIM-3, and LAG-3, which were the markers of exhausted CD8@*RESULTS@#The expressions of inhibitory receptors (PD-1, TIM3 and LAG-3) on CD8@*CONCLUSION@#The exhausted CD8


Subject(s)
CD8-Positive T-Lymphocytes , Hepatitis A Virus Cellular Receptor 2 , Humans , Interferon-gamma , Lymphocyte Count , Lymphohistiocytosis, Hemophagocytic
4.
Braz. arch. biol. technol ; 64(spe): e21210127, 2021. tab, graf
Article in English | LILACS | ID: biblio-1285571

ABSTRACT

Abstract The rapid and accurate diagnosis of tuberculosis (TB), especially considering limited resources, is still a challenge. Development of new methodologies and tests are needed to overcome several disadvantages of the available standard tests. We evaluated the diagnostic potential of two antigens specific for Mycobacterium tuberculosis, the CFP10 and ESAT6 recombinant proteins, and developed stable formulations thereof. Sensitivity and specificity of the delayed-type hypersensitivity (DTH) skin testing and the induction of gamma interferon production (IFN-γ) by lymphocytes, as a non-invasive test, were evaluated using the CFP10 and ESAT6 protein formulations. The recombinant proteins produced by our group presented a high DTH response and the ability to differentiate between tuberculosis infection, BCG vaccination, and the contact with non-tuberculous mycobacteria (NTM). The production of IFN-γ by stimulation with individual and combined proteins was detected in a panel of 40 individuals and showed a specificity of 100% and a sensitivity of 90% when the two proteins were used together. Lyophilized formulations were stable under all conditions, while soluble formulations were stable under freezing at -20 ºC and -80 ºC. The proposed formulations containing the ESAT6 and CFP10 recombinant antigens constitute satisfactory tools for TB testing, suitable to be developed and implemented in a large-scale trial.


Subject(s)
Tuberculosis/diagnosis , Interferon-gamma , Mycobacterium tuberculosis/isolation & purification , Antigens/chemistry
5.
Brasília; s.n; 1 ago. 2020.
Non-conventional in Portuguese | PIE, LILACS, BRISA, PIE | ID: biblio-1117735

ABSTRACT

O Informe Diário de Evidências é uma produção do Ministério da Saúde que tem como objetivo acompanhar diariamente as publicações científicas sobre tratamento farmacológico e vacinas para a COVID-19. Dessa forma, são realizadas buscas estruturadas em bases de dados biomédicas, referentes ao dia anterior desse informe. Não são incluídos estudos pré-clínicos (in vitro, in vivo, in silico). A frequência dos estudos é demonstrada de acordo com a sua classificação metodológica (revisões sistemáticas, ensaios clínicos randomizados, coortes, entre outros). Para cada estudo é apresentado um resumo com avaliação da qualidade metodológica. Essa avaliação tem por finalidade identificar o grau de certeza/confiança ou o risco de viés de cada estudo. Para tal, são utilizadas ferramentas já validadas e consagradas na literatura científica, na área de saúde baseada em evidências. Cabe ressaltar que o documento tem caráter informativo e não representa uma recomendação oficial do Ministério da Saúde sobre a temática. Foram encontrados 16 artigos.


Subject(s)
Pneumonia, Viral/drug therapy , Coronavirus Infections/drug therapy , Betacoronavirus/drug effects , Ascorbic Acid/therapeutic use , Technology Assessment, Biomedical , Angiotensin-Converting Enzyme Inhibitors/therapeutic use , BCG Vaccine/therapeutic use , Colchicine/therapeutic use , Cross-Sectional Studies , Cohort Studies , Interferon-gamma/therapeutic use , Adrenal Cortex Hormones/therapeutic use , Antirheumatic Agents/therapeutic use , Ritonavir/therapeutic use , Interleukin 1 Receptor Antagonist Protein/therapeutic use , Lopinavir/therapeutic use , Interferon alpha-2/therapeutic use , Glucocorticoids/therapeutic use , Hydroxychloroquine/therapeutic use
6.
Rev. Ciênc. Méd. Biol. (Impr.) ; 19(1): 49-53, jun 17, 2020. tab, ilus
Article in Portuguese | LILACS | ID: biblio-1358666

ABSTRACT

Introdução: o Teste Cutâneo Tuberculínico (TCT) tem sido utilizado como diagnóstico para a Tuberculose Infecção Latente (TBIL). Os profissionais de saúde, principalmente os que trabalham com assistência a pacientes com tuberculose (TB), têm risco elevado de contrair a doença ou a TBIL. Normas de biossegurança e qualificação da equipe de trabalho são fundamentais para o controle da Tb entre os profissionais de saúde. Atualmente testes diagnósticos mais específicos para a TBIL têm sido utilizados como alternativa para o padronizado TCT, dentre eles o QuantiFERON-TB Gold (QTF®). Objetivo: comparar e avaliar os resultados obtidos no QTF® e Teste Cutâneo Tuberculínico dos profissionais de saúde de um centro de referência terciário para Tuberculose. Metodologia: o projeto foi aprovado pelo Comitê de Ética em Pesquisa da Fundação Bahiana Desenvolvimento Científico e pelo Comitê de Ética em Pesquisa da instituição hospitalar. Foi utilizado o banco de dados do setor de medicina ocupacional da Instituição e os 87 voluntários que atenderam aos critérios do estudo foram categorizados e distribuídos em dois grupos: TCT negativo (<5mm) e TCT positivo (>5mm). Foi realizada coleta de sangue para o teste QTF®. Resultados: dos 47 profissionais de saúde TCT negativo 53,2% tiveram resultado QTF negativo. Dos 40 profissionais TCT positivo, 67,5% apresentaram resultado QTF® positivo. O grau de concordância do índice kappa foi de 0,24. Conclusão: O QTF® não mostrou uma especificidade superior quando comparado ao TCT.


Introduction: tuberculin Skin test (TST) is a test used to Latent tuberculosis Infection (LTBI) diagnosis. Health professional, principally those that work with tuberculosis (TB) patients, have a high risk of contract and developing the disease or LTBI. Biosecurity norms and professional qualification are fundamentals to TB control in care centers. Actually some diagnosis tests with higher specificity of LTBI are used as an alternative to the TST, such as QuantiFERON-TB Gold (QTF®). Objective: to compare and evaluate the results obtained in the Quantiferon-TB Gold® and TST, of health professionals from a tertiary referral center for Tuberculosis. Methodology: the project was approved by a Research Ethics Committee of FBDC, and by the CEP of the hospital institution. The data base of the occupational medicine sector and the health professionals were categorized and distributed in two groups: Negative Tuberculin test and Positive Tuberculin test. The 93 volunteers who met the criteria and agreed to participate, signed the consent form, with subsequent data collection. A blood collection was also performed to perform Quantiferon-TB Gold® test. Results: of the 47 PS negative Tuberculin test, 53.2% had negative Quantiferon-TB Gold® results and 46.8% positive. Of the health professional positive Tuberculin test, 32.5% presented negative Quantiferon-TB Gold® result and 67.5% positive. Conclusion: quantiferon-TB Gold® did not show superior specificity when compared to Tuberculin test on this coorte.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Tuberculin Test , Interferon-gamma , Health Personnel , Latent Tuberculosis , Cross-Sectional Studies , Retrospective Studies , Observational Study
7.
Braz. j. med. biol. res ; 53(1): e8669, Jan. 2020. tab, graf
Article in English | LILACS | ID: biblio-1055478

ABSTRACT

This study aimed to investigate the therapeutic effect of fasudil on treating experimental autoimmune neuritis (EAN). Twenty-four EAN mice were randomly assigned to fasudil treatment (Fasudil group) or saline treatment (EAN model group) for 28 days. Clinical symptom score was evaluated every other day; inflammatory cell infiltration, demyelination, anti-myelin basic protein (MBP), inflammatory cytokines, inducible nitric oxide synthase (iNOS), and arginase-1 were detected in sciatic nerves at day 28. Th1, Th2, Th17, and Tregs proportions in splenocytes were detected at day 28. Clinical symptom score was found to be attenuated in the Fasudil group compared to the EAN model group from day 12 to day 28. Sciatic nerve inflammatory cell counts by HE staining and demyelination by luxol fast blue staining were both reduced, while MBP was increased in the Fasudil group compared to the EAN model group at day 28. Interferon γ (IFN-γ) and interleukin (IL)-17 were reduced, while IL-4 and IL-10 were elevated in the Fasudil group at day 28. Sciatic nerve M1 macrophages marker iNOS was decreased while M2 macrophages marker arginase-1 was increased in the Fasudil group at day 28. CD4+IFN-γ+ (Th1) and CD4+IL-17+ (Th17) cell proportions were both decreased, CD4+IL-4+ (Th2) cell proportion was similar, while CD25+FOXP3+ (Treg) cell proportion in splenocytes was increased in the Fasudil group. In summary, fasudil presented a good therapeutic effect for treating EAN by attenuating Th1/Th17 cells and promoting Tregs activation as well as M2 macrophages polarization.


Subject(s)
Animals , Female , Rabbits , Interleukins/blood , Interferon-gamma/blood , T-Lymphocytes, Helper-Inducer/drug effects , Neuritis, Autoimmune, Experimental/drug therapy , Sciatic Nerve/drug effects , Sciatic Nerve/metabolism , Time Factors , Real-Time Polymerase Chain Reaction , RNA, Mitochondrial , Mice, Inbred C57BL , Neuritis, Autoimmune, Experimental/blood
8.
Article in English | WPRIM | ID: wpr-762457

ABSTRACT

BACKGROUND: The interferon-gamma (IFN-γ) releasing assay (IGRA) is widely used for latent tuberculosis infection (LTBI) diagnosis. We evaluated the analytical performance of a new automated chemiluminescent immunoanalyzer-based IGRA (CLIA-IGRA), AdvanSure I3 (LG Life Sciences, Seoul, Korea) and compared it with that of the QuantiFERON-TB Gold In-Tube (QFT-GIT) assay. METHODS: Repeatability and reproducibility were evaluated at four levels. Detection capability, including limit of blank (LoB), limit of detection (LoD), and limit of quantification (LoQ), was evaluated using IFN-γ standard material (National Institute for Biological Standards and Control code: 87/586). Agreement between the results of two assays was evaluated using 341 blood samples from healthcare workers and patients at a tertiary care hospital. To determine the cut-off value of CLIA-IGRA for diagnosing LTBI, the ROC curve was analyzed. RESULTS: Repeatability and reproducibility were 4.86–7.00% and 6.36–7.88% CV, respectively. LoB, LoD, and LoQ were 0.022, 0.077, and 0.249 IU/mL, respectively. IFN-γ values between CLIA-IGRA and QFT-GIT showed a strong correlation within the analytical measurable range of both assays, especially when the value was low. Qualitative comparison of the two assays yielded a 99.1% overall agreement (kappa coefficient=0.98). A cut-off value of 0.35 IU/mL was appropriate for diagnosing LTBI. CONCLUSIONS: CLIA-IGRA is a reliable assay for LTBI diagnosis, with performance similar to that of QFT-GIT.


Subject(s)
Biological Science Disciplines , Delivery of Health Care , Diagnosis , Humans , Interferon-gamma , Latent Tuberculosis , Limit of Detection , ROC Curve , Seoul , Tertiary Healthcare
9.
Article in Chinese | WPRIM | ID: wpr-827182

ABSTRACT

OBJECTIVE@#To investigate the effects of different routes in placental mesenchymal stem cells (PMSC) on serum expression levels of IL-4, IL-17, TNF-α and IFN-γ in aplastic anemia (AA) rats.@*METHODS@#The rat model of aplastic anemia (AA rats) was established by 5-fluorouracil combined with busulfan. The rats was divided into four groups: control, experimental, PMSC-injected into the tail vein, and PMSC-injected into the medullary cavity. The general state of rats in each group was observed in detail before and after treatment. The serum levels of interleukin-4 (IL-4) , interleukin-17 (IL-17), tumor necrosis factor-α (TNF-α), interferon-γ (IFN-γ) were measured by enzyme-linked immunosorbent assay (ELISA) at week 1, 3 and 5 after treatment.@*RESULTS@#The serum levels of TNF-α, IFN-γ and IL-17 in the experimental group were significantly higher than those in the control group, while the level of IL-4 was significantly decreased (P<0.05). The levels of TNF-α, IFN-γ and IL-17 gradually decreased after treatment while the level of IL-4 increased. By the fifth week, the above indexes were closed to the control group (P>0.05), and the levels of TNF-α, IFN-γ and IL-17 in the group with PMSCs injected via the medullary cavity decrease more significantly than those group with PMSC injected via the tail vein, but level of IL-4 was not significantly different between two groups.@*CONCLUSION@#The level of serum hematopoietic negative regulators increase significantly, and the level of hematopoietic promoting factors decreases significantly in aplastic anemia rats. PMSC can down-regulate the level of hematopoietic negative regulators and up-regulate the level of hematopoietic promoting factors in the rats with aplastic anemia, and the inhibition of hematopoietic negative regulators by intramedullary injection is more significant than that by caudal vein injection.


Subject(s)
Anemia, Aplastic , Animals , Female , Hematopoietic Stem Cell Transplantation , Interferon-gamma , Mesenchymal Stem Cells , Placenta , Pregnancy , Rats , Tumor Necrosis Factor-alpha
10.
Article in Chinese | WPRIM | ID: wpr-828939

ABSTRACT

OBJECTIVE@#To assess the effect of neutralizing CD96 on natural killer (NK) cell functions in mice with pulmonary infection and explore the possible mechanism.@*METHODS@#Male BALB/c mice were randomly divided into infection group (Cm group), anti-CD96 treatment group (anti-CD96 group) and control group (=5). In the former two groups, was inoculated intranasal administration to establish mouse models of pulmonary infection, and the mice in the control group received intranasal administration of the inhalation buffer. In anti-CD96 group, the mice were injected with anti-CD96 antibody intraperitoneally at the dose of 250 μg every 3 days after the infection; the mice in Cm group received intraperitoneal injections of saline. The body weight of the mice was recorded daily. The mice were sacrificed 5 days after infection, and CD96 expression was detected by quantitative real-time PCR and Western blotting. HE staining and pathological scores were used to evaluate pneumonia of the mice. The inclusion body forming units (IFUs) were detected in the lung tissue homogenates to assess lung tissue chlamydia load. Flow cytometry and ELISA were used to assess the capacity of the lung NK cells to produce interferon-γ (IFN-γ) and regulate macrophages and Th1 cells.@*RESULTS@# infection inhibited CD96 expression in NK cells of the mice. Compared with those in Cm group, the mice in antiCD96 mice showed significantly milder lung inflammation ( < 0.05) and reduced chlamydia load in the lung tissue ( < 0.05). Neutralizing CD96 with anti-CD96 significantly enhanced IFN-γ secretion by the NK cells ( < 0.05) and augmented the immunoregulatory effect of the NK cells shown by enhanced responses of the lung macrophages ( < 0.05) and Th1 cells ( < 0.05).@*CONCLUSIONS@#Inhibition of CD96 alleviates pneumonia in -infected mice possibly by enhancing IFN-γ secretion by NK cells and augmenting the immunoregulatory effect of the NK cells on innate and adaptive immunity.


Subject(s)
Animals , Antigens, CD , Chlamydia Infections , Chlamydia muridarum , Interferon-gamma , Killer Cells, Natural , Lung Injury , Male , Mice , Mice, Inbred BALB C , Mice, Inbred C57BL
11.
Article in Chinese | WPRIM | ID: wpr-828520

ABSTRACT

OBJECTIVE@#To assess the effect of neutralizing CD96 on natural killer (NK) cell functions in mice with pulmonary infection and explore the possible mechanism.@*METHODS@#Male BALB/c mice were randomly divided into infection group (Cm group), anti-CD96 treatment group (anti-CD96 group) and control group (=5). In the former two groups, was inoculated intranasal administration to establish mouse models of pulmonary infection, and the mice in the control group received intranasal administration of the inhalation buffer. In anti-CD96 group, the mice were injected with anti-CD96 antibody intraperitoneally at the dose of 250 μg every 3 days after the infection; the mice in Cm group received intraperitoneal injections of saline. The body weight of the mice was recorded daily. The mice were sacrificed 5 days after infection, and CD96 expression was detected by quantitative real-time PCR and Western blotting. HE staining and pathological scores were used to evaluate pneumonia of the mice. The inclusion body forming units (IFUs) were detected in the lung tissue homogenates to assess lung tissue chlamydia load. Flow cytometry and ELISA were used to assess the capacity of the lung NK cells to produce interferon-γ (IFN-γ) and regulate macrophages and Th1 cells.@*RESULTS@# infection inhibited CD96 expression in NK cells of the mice. Compared with those in Cm group, the mice in antiCD96 mice showed significantly milder lung inflammation ( < 0.05) and reduced chlamydia load in the lung tissue ( < 0.05). Neutralizing CD96 with anti-CD96 significantly enhanced IFN-γ secretion by the NK cells ( < 0.05) and augmented the immunoregulatory effect of the NK cells shown by enhanced responses of the lung macrophages ( < 0.05) and Th1 cells ( < 0.05).@*CONCLUSIONS@#Inhibition of CD96 alleviates pneumonia in -infected mice possibly by enhancing IFN-γ secretion by NK cells and augmenting the immunoregulatory effect of the NK cells on innate and adaptive immunity.


Subject(s)
Animals , Antigens, CD , Metabolism , Chlamydia Infections , Allergy and Immunology , Chlamydia muridarum , Interferon-gamma , Genetics , Metabolism , Killer Cells, Natural , Metabolism , Lung Injury , Genetics , Male , Mice , Mice, Inbred BALB C , Mice, Inbred C57BL
12.
Rev. bras. oftalmol ; 78(3): 202-209, May-June 2019. tab
Article in Portuguese | LILACS | ID: biblio-1013668

ABSTRACT

Resumo A detecção precisa da infecção latente por tuberculose está se tornando cada vez mais importante devido ao aumento do uso de medicamentos imunossupressores e da epidemia do vírus da imunodeficiência humana, o que aumentou o risco de reativação à tuberculose ativa (TB). O Teste IGRA QuantiFERON® TB Gold apresenta vantagens frente ao teste de PPD como por exemplo, requer somente uma coleta de amostra sanguínea ; não há necessidade que o paciente retorne ao laboratório para leitura e interpretação dos resultados; Os resultados são objetivos, não requerem interpretação do leitor ou interferência de critérios subjetivos; trata-se de um teste in vitro, portanto não há "efeito booster" (potenciação da reação tuberculínica); o teste não é afetado por vacinação prévia por BCG ou infecção por outras espécies de micobactérias. Limitações são descritas, apesar de raras, como reações cruzadas deste método com infecções por algumas espécies de micobactérias não-tuberculosis (incluindo Mycobacterium kansasii, Mycobacterium szulgai e Mycobacterium marinum). Ainda há poucos dados sobre o teste IGRA em certas populações, como por exemplo, em crianças, pacientes imunocomprometidos e mulheres grávidas. Nestes grupos, a interpretação do teste pode ser difícil e mais estudos se fazem necessários.


Abstract Precise detection of latent tuberculosis infection is becoming increasingly important due to increased use of immunosuppressive drugs and the human immunodeficiency virus epidemic , which increased the risk of reactivation to active tuberculosis (TB).The QuantiFERON® TB Gold IGRA Test has advantages over the skin test for TB, otherwise known as a Mantoux tuberculin test, for example, requires only a blood sample collection; there is no need for the patient to return to the laboratory for reading and interpretation of the results; The results are objective, do not require interpretation of the reader or interference of subjective criteria; it is an in vitro test, so there is no "booster effect" (potentiation of the tuberculin reaction); the test is not affected by prior BCG vaccination or infection with other species of mycobacteria. Limitations are described, although rare, as cross-reactions of this method with infections by some species of non-tuberculosis mycobacteria (including Mycobacterium kansasii, Mycobacterium szulgai and Mycobacterium marinum). There is still little data on the IGRA test in certain populations, such as in children, immunocompromised patients and pregnant women. In these groups, the interpretation of the test can be difficult and more studies are needed.


Subject(s)
Humans , Uveitis/diagnosis , Tuberculin Test , Tuberculosis, Ocular/diagnosis , Interferon-gamma Release Tests/methods , Tuberculin/analysis , Comparative Study , Interferon-gamma/analysis , Mycobacterium tuberculosis/isolation & purification
13.
Acta cir. bras ; 34(12): e201901206, 2019. tab
Article in English | LILACS | ID: biblio-1054688

ABSTRACT

Abstract Purpose To evaluate the effects of prednisolone against sodium diclofenac both with ciprofloxacin compared to artificial tears on the symptoms and signs of acute viral conjunctivitis. Methods Study included 37 patients diagnosed with acute conjunctivitis and distributed by three groups: A (1% prednisolone acetate + ciprofloxacin (0.3%); B (Sodium diclofenac (0.1%) + ciprofloxacin (0.3%) and C (artificial tears + ciprofloxacin (0.3%). Patients received medication 6/6 hours daily. Signs and symptoms (e.g. lacrimation, burning, photophobia, etc.) were scored at baseline and on the first, third, fifth and seventh days and in the end of treatment using a standardized questionnaire and slit lamp anterior segment examination. Results All three groups demonstrated an improvement in the signs and symptoms of conjunctivitis in their follow-up visits. There was no significant difference in symptom and sign scores between Group A and B and B and C in the study visits ( p >0.05). However, the comparison between groups A and C showed a clinical trend (p=0.05) on third evaluation suggesting better clinical action using the corticosteroids. Conclusion The prednisolone acetate was not superior to the use of sodium diclofenac or artificial tears in relieving the signs and symptoms of viral conjunctivitis.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Young Adult , Prednisolone/analogs & derivatives , Ciprofloxacin/administration & dosage , Anti-Inflammatory Agents, Non-Steroidal/administration & dosage , Conjunctivitis, Viral/drug therapy , Diclofenac/administration & dosage , Adrenal Cortex Hormones/administration & dosage , Ophthalmic Solutions/administration & dosage , Prednisolone/administration & dosage , Acute Disease , Analysis of Variance , Interleukins/analysis , Interferon-gamma , Tumor Necrosis Factor-alpha/analysis , Treatment Outcome , Nitric Oxide Synthase/analysis , Lubricant Eye Drops/administration & dosage
14.
Article in Korean | WPRIM | ID: wpr-766545

ABSTRACT

In order to eliminate tuberculosis worldwide by 2050, effective management of latent tuberculosis infection is essential, and policy-makers have begun to recognize the importance of scaling up preventive therapy. The current guideline recommends targeted latent tuberculosis infection testing that identifies high-risk groups based on risk stratification for progression from latent infection to active disease. Both the tuberculin skin test and interferon-gamma releasing assay have a similar diagnostic efficacy for predicting progression to active tuberculosis. The Korean guideline recommends 9-month isoniazid monotherapy as the standard treatment; however, more evidence supports that short course rifampicin-based regimen is both more effective and tolerable than isoniazid monotherapy.


Subject(s)
Diagnosis , Interferon-gamma , Interferon-gamma Release Tests , Isoniazid , Latent Tuberculosis , Skin Tests , Tuberculin , Tuberculosis
15.
Article in English | WPRIM | ID: wpr-766139

ABSTRACT

The 2018 National Guideline for Tuberculosis Control, which was published by the Korea Centers for Diseases Prevention and Control (KCDC), mandates conducting an epidemiological survey among close contacts of active tuberculosis patients at public institutions such as schools. In the procedure for these surveys, the tuberculin skin test (TST) is mandated as the screening test for latent tuberculosis infection in elementary school students. However, several guidelines recommend using the interferon-gamma releasing assay (IGRA) for contacts aged over 5 years with a Bacillus Calmette–Guérin vaccination history. The main reason for this is that IGRA has a higher specificity and lower false positive rate than TST. In addition, IGRA requires only a single visit to draw blood and the results are available within 24 hours. These advantages could promote cooperation from both parents and students in conducting these surveys. Thus, these findings regarding the benefits of IGRA for surveys of close contacts at elementary schools should be incorporated into the KCDC guideline.


Subject(s)
Bacillus , Humans , Interferon-gamma , Interferon-gamma Release Tests , Korea , Latent Tuberculosis , Mass Screening , Mycobacterium tuberculosis , Parents , Sensitivity and Specificity , Skin Tests , Tuberculin , Tuberculin Test , Tuberculosis , Vaccination
16.
Yonsei Medical Journal ; : 1093-1102, 2019.
Article in English | WPRIM | ID: wpr-762049

ABSTRACT

PURPOSE: Staphylococcal enterotoxin B (SEB) has been well-documented to induce liver injury. miRNA-222-3p (miR-222-3p) was implicated in SEB-induced lung injury and several liver injuries. This study aimed to explore the role of miR-222-3p in SEB-induced liver injury. MATERIALS AND METHODS: Expression of miR-222-3p and suppressors of cytokine signaling 1 (SOCS1) was detected using real-time quantitative PCR and western blot. Liver injury was determined by levels of aspartate aminotransferase (AST), alanine aminotransferase (ALT), and inflammatory cytokines, numbers of infiltrating mononuclear cells using AST/ALT assay kit, enzyme-linked immunosorbent assay (ELISA), and hematoxylin-eosin staining, respectively. Target binding between miR-222-3p and SOCS1 was predicted on targetScan software, and confirmed by luciferase reporter assay. RESULTS: SEB induced liver injury in D-galactosamine (D-gal)-sensitized mice, as demonstrated by increased serum levels of AST and ALT, elevated release of interferon-gamma (INF-γ), tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), and IL-2, and promoted infiltrating immune cells into liver. Expression of miR-222-3p was dramatically upregulated, and SOCS1 was downregulated in SEB-induced liver injury both in mice and splenocytes. Moreover, miR-222-3p knockout (KO) mice exhibited alleviated liver injury accompanied with SOCS1 upregulation. Besides, splenocytes under SEB challenge released less INF-γ, TNF-α, IL-6, and IL-2 during miR-222-3p knockdown. Mechanically, SOCS1 was targeted and downregulated by miR-222-3p. Upregulation of SOCS1 attenuated INF-γ, TNF-α, IL-6, and IL-2 release in SEB-induced splenocytes; downregulation of SOCS1 could block the suppressive role of miR-222-3p knockdown in SEB-induced splenocytes. CONCLUSION: Inhibition of miR-222-3p relieves SEB-induced liver inflammatory injury by upregulating SOCS1, thereby providing the first evidence of miR-222-3p in SEB-induced liver injury.


Subject(s)
Alanine Transaminase , Animals , Aspartate Aminotransferases , Blotting, Western , Cytokines , Down-Regulation , Enterotoxins , Enzyme-Linked Immunosorbent Assay , Interferon-gamma , Interleukin-2 , Interleukin-6 , Liver , Luciferases , Lung Injury , Mice , Polymerase Chain Reaction , Tumor Necrosis Factor-alpha , Up-Regulation
17.
Article in Chinese | WPRIM | ID: wpr-775066

ABSTRACT

OBJECTIVE@#To study the mRNA level of runt-related transcription factor 3 (RUNX3) in children with bronchiolitis and its clinical significance in bronchiolitis.@*METHODS@#A total of 54 young children with bronchiolitis were enrolled as the bronchiolitis group, among whom 28 with atopic constitution were enrolled in the atopic bronchiolitis group and 26 with non-atopic constitution were enrolled in the non-atopic bronchiolitis group. A total of 48 healthy young children were enrolled as the healthy control group, among whom 24 with atopic constitution were enrolled in the atopic healthy control group and 24 with non-atopic constitution were enrolled in the non-atopic healthy control group. Quantitative real-time PCR was used to measure the mRNA level of RUNX3 in peripheral blood mononuclear cells. ELISA was used to measure the serum levels of interleukin-4 (IL-4) and interferon gamma (IFN-γ).@*RESULTS@#The bronchiolitis group had a significantly lower mRNA level of RUNX3 than the healthy control group, and the atopic bronchiolitis group had a significantly lower mRNA level of RUNX3 than the non-atopic bronchiolitis, atopic healthy control, and non-atopic healthy control groups (P<0.05). The bronchiolitis group had a significantly higher serum level of IL-4 than the healthy control group, and the atopic bronchiolitis group had a significantly higher serum level of IL-4 than the non-atopic healthy control group (P<0.05). The bronchiolitis group had a significantly lower serum level of IFN-γ than the healthy control group, and the atopic bronchiolitis group had a significantly lower serum level of IFN-γ than the non-atopic bronchiolitis, atopic healthy control, and non-atopic healthy control groups (P<0.05). The correlation analysis showed that the mRNA level of RUNX3 was negatively correlated with the serum level of IL-4 and was positively correlated with the serum level of IFN-γ (P<0.05).@*CONCLUSIONS@#Measurement of RUNX3 gene expression in peripheral blood mononuclear cells has a certain value in identifying children with atopic constitution at high risk of asthma among children with bronchiolitis.


Subject(s)
Asthma , Bronchiolitis , Child , Child, Preschool , Core Binding Factor Alpha 3 Subunit , Genetics , Humans , Interferon-gamma , Leukocytes, Mononuclear
18.
Article in Chinese | WPRIM | ID: wpr-774001

ABSTRACT

Objective To analyze the levels of cytokines (IL-2,IFN-γ,IL-6,IL-10) associated with Th1 and Th2 cells in HLA-DQ8 transgenic mice model of ocular experimental autoimmune myasthenia gravis (oEAMG) induced by recombinant H-AChR γ subunit immunization.Methods DQ8 mice were immunized with 20 μg of AChR γ subunit,20 μg of crude E. coli extract (E. coli group),or complete Freund's adjuvant (CFA) only (CFA group). All mice were immunized on days 0,30,and 60. Mice were euthanized 28 days after the third immunization,and draining lymph node cells (LNC) and spleen lymphocytes were cultured in vitro. The supernatant was collected to observe the interleukin(IL)-2,interferon(IFN)-γ,IL-6,IL-10 production by ELISA.Results LNCs and spleen lymphocytes of H-AChR γ subunit-immunized mice exhibited significantly enhanced IFN-γ (F=76.332,P<0.001;F=34.865,P<0.001) and IL-2 (F=42.835,P<0.001;F=38.030,P<0.001),which associated with Th1 cells,as compared to E. coli group and CFA group. There were no significant differences in IL-6 (F=1.325,P=0.284;F=1.935,P=0.166) and IL-10 (F=0.908,P=0.417;F=1.189,P=0.322) levels,which secreted by Th2 cells,among these three groups.Conclusion Th1 cytokines play key roles in the pathogenesis of oEAMG,while the mechanism of Th2 cytokines for oEAMG remains unclear.


Subject(s)
Animals , Cytokines , Escherichia coli , HLA-DQ Antigens , Interferon-gamma , Mice , Mice, Transgenic , Receptors, Cholinergic , Th1 Cells , Th2 Cells
19.
Article in Chinese | WPRIM | ID: wpr-773697

ABSTRACT

The aim of this paper was to study the influence of triptolide in the immune response pathways of acquired immune deficiency syndrome( AIDS). Target proteins of triptolide and related genes of AIDS were searched in PubChem and Gene databases on line. Molecular networks and canonical pathways comparison analyses were performed by bioinformatics software( IPA). There were 15 targets proteins of triptolide and 258 related genes of AIDS. Close biological relationships of molecules of triptolide and AIDS were established by networks analysis. There were 21 common immune response pathways of triptolide and AIDS,including neuroinflammation signaling pathway,Th1 and Th2 activation pathway and role of pattern recognition receptors in recognition of bacteria and viruses. Triptolide stimulated immune response pathways by the main molecules of IFNγ,JAK2,NOD1,PTGS2,RORC. IFNγ is the focus nodes of triptolide and AIDS,and regulates genes of AIDS directly or indirectly. Triptolide may against AIDS by regulating molecules IFNγ in immune response pathways.


Subject(s)
Acquired Immunodeficiency Syndrome , Drug Therapy , Allergy and Immunology , Computational Biology , Diterpenes , Pharmacology , Epoxy Compounds , Pharmacology , Gene Regulatory Networks , Humans , Interferon-gamma , Genetics , Phenanthrenes , Pharmacology , Receptors, Pattern Recognition , Allergy and Immunology , Signal Transduction , T-Lymphocytes , Allergy and Immunology
20.
Article in Chinese | WPRIM | ID: wpr-772129

ABSTRACT

OBJECTIVE@#To investigate the interaction between interleukin-17 (IL-17) and interferon-γ (IFN-γ) and how their interaction affects the growth of mouse hepatoma Hepa1-6 cells.@*METHODS@#Hepa1-6 cells treated with IL-17 and IFN-γ either alone or in combination were examined for changes in cell proliferation using MTT assay and in cell cycle distribution using flow cytometry. Western blotting was used to detect the protein expression levels of proliferating cell nuclear antigen (PCNA), cyclin D1, P21 and P16 and the phosphorylation of p38MAPK, ERK1/2 and Stat1 in the cells.@*RESULTS@#Compared with control group, IFN-γ treatment obviously inhibited the growth and proliferation of Hepa1-6 cells, induced cell cycle arrest at G0/G1 phase, reduced the protein expression of PCNA and cyclin D1, and increased the protein expression of P21. IL-17 alone had no effect on the growth of Hepa1-6 cells. In the combined treatment, IL-17 significantly antagonized the effects of IFN-γ. Compared with those treated with IFN-γ alone, the cells with the combined treatment showed significantly decreased G0/G1 cell population, increased the protein expressions of PCNA and cyclin D1, and decreased the protein expression of P21. IL-17 significantly inhibited IFN-γ-induced phosphorylation of p38MAPK and ERK1/2 without affecting the phosphorylation of Stat1.@*CONCLUSIONS@#IL-17 obviously reverses the antitumor effects of IFN-γ to promote the proliferation of mouse hepatoma cells and accelerate the development of hepatocellular carcinoma.


Subject(s)
Animals , Carcinoma, Hepatocellular , Metabolism , Pathology , Cell Cycle , Cell Line, Tumor , Cell Proliferation , Cyclin D1 , Metabolism , Cyclin-Dependent Kinase Inhibitor p21 , Metabolism , Interferon-gamma , Interleukin-17 , Pharmacology , Liver Neoplasms , Metabolism , Pathology , Mice , Neoplasm Proteins , Metabolism , Proliferating Cell Nuclear Antigen , Metabolism
SELECTION OF CITATIONS
SEARCH DETAIL