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1.
Chinese journal of integrative medicine ; (12): 394-404, 2023.
Article in English | WPRIM | ID: wpr-982292

ABSTRACT

OBJECTIVE@#To examine the anti-inflammatory effect of grape seed extract (GSE) in animal and cellular models and explore its mechanism of action.@*METHODS@#This study determined the inhibitory effect of GSE on macrophage inflammation and Th1 and Th17 polarization in vitro. Based on the in vitro results, the effects and mechanisms of GSE on multiple sclerosis (MS)-experimental autoimmune encephalomyelitis (EAE) mice model were further explored. The C57BL/6 mice were intragastrically administered with 50 mg/kg of GSE once a day from the 3rd day to the 27th day after immunization. The activation of microglia, the polarization of Th1 and Th17 and the inflammatory factors such as tumor necrosis factor- α (TNF- α), interleukin-1 β (IL-1 β), IL-6, IL-12, IL-17 and interferon-γ (IFN-γ) secreted by them were detected in vitro and in vivo by flow cytometry, enzyme linked immunosorbent assay (ELISA), immunofluorescence staining and Western blot, respectively.@*RESULTS@#GSE reduced the secretion of TNF-α, IL-1 β and IL-6 in bone marrow-derived macrophages stimulated by lipopolysaccharide (P<0.01), inhibited the secretion of TNF-α, IL-1 β, IL-6, IL-12, IL-17 and IFN-γ in spleen cells of EAE mice immunized for 9 days (P<0.05 or P<0.01), and reduced the differentiation of Th1 and Th17 mediated by CD3 and CD28 factors (P<0.01). GSE significantly improved the clinical symptoms of EAE mice, and inhibited spinal cord demyelination and inflammatory cell infiltration. Peripherally, GSE downregulated the expression of toll-like-receptor 4 (TLR4) and Rho-associated kinase (ROCKII, P<0.05 or P<0.01), and inhibited the secretion of inflammatory factors (P<0.01 or P<0.05). In the central nervous system, GSE inhibited the infiltration of CD45+CD11b+ and CD45+CD4+ cells, and weakened the differentiation of Th1 and Th17 (P<0.05). Moreover, it reduced the secretion of inflammatory factors (P<0.01), and prevented the activation of microglia (P<0.05).@*CONCLUSION@#GSE had a beneficial effect on the pathogenesis and progression of EAE by inhibiting inflammatory response as a potential drug and strategy for the treatment of MS.


Subject(s)
Mice , Animals , Encephalomyelitis, Autoimmune, Experimental/pathology , Grape Seed Extract/therapeutic use , Interleukin-17 , Interleukin-1beta , Tumor Necrosis Factor-alpha/metabolism , Interleukin-6/metabolism , Th1 Cells , Mice, Inbred C57BL , Interferon-gamma/therapeutic use , Th17 Cells/metabolism , Interleukin-12/therapeutic use , Cytokines/metabolism
2.
Brasília; s.n; 1 ago. 2020.
Non-conventional in Portuguese | 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
3.
Article in English | IMSEAR | ID: sea-163007

ABSTRACT

Aims: The objective of this study was to determine the level of secretion of gammainterferon by interferon-primed and unprimed Caco-2 intestinal epithelial cells and their survival or growth following infection with Salmonella enterica subsp. enterica serovar Typhimurium (ATCC 14028), Salmonella enterica subsp. enterica serovar Typhimurium DT104 (ATCC 700408), and Candida albicans (Robin) Berkhout, anamorph (ATCC 10231) as well as the survival of the test microorganisms following infection. Study Design: Controlled laboratory experiments were performed using two different species of Salmonella and adenocarcinoma Caco-2 cells. Untreated/ unprimed Caco-2 cells served as control; Caco-2 cells’ growth and interferon production were then determined using, Enzyme Linked Immunosorbent Assay (ELISA) and flow cytometry. Place and Duration of Study: Department of Biological & Environmental Sciences Alabama A& M University and Center for Excellence in Post-Harvest Technologies, North Carolina A&T University USA April 2008 and February 2010. Methodology: Cell culture supernatants of Caco-2 intestinal epithelial cells, primed and unprimed with IFN-γ were infected with either wild-type Salmonella Typhimurium 14028, Candida albicans10231 or multi-drug resistant Salmonella Typhimurium DT104 were collected and analyzed. ELISA and flow cytometry were used to determine apoptosis, cell growth and interferon production. The Bioscreen-C Automated Growth Curve Analysis System was used under controlled environment to determine the growth of the microorganisms in the presence of different concentrations of IFN-γ. Results: Secretion of IFN-γ from Caco-2 cells that were previously treated with 50μg/ml, 20μg/ml, 10μg/ml, 5μg/ml, and 2.5 μg/ml of IFN-γ were not concentration dependent. However, the amount of IFN-γ released from Caco-2 cells was dependent on microbial stimulus type. Cells that were pretreated with 5 μg/ml and 2.5 μg/ml of IFN-γ and then infected with Salmonella Typhimurium DT104 showed an increase in the amount of IFN-γ in the culture medium after 5 minutes. IFN-y induced CaCo-2 cell death was dose-dependent for S.Typhimurium DT104 and Candida albicans. Results are reported as mean ± SEM fortriplicate values from three independent experiments at each time point and IFN-γ dose. Conclusion: These findings indicate that IFN-γ may serve as alternative antimicrobial compounds to reduce the persistence of multi-drug resistant microorganisms such as S. Typhimurium DT104. Induction of interferon-gamma production may be related to microbial virulence/pathogenicity. The potential of IFN-γ as a natural therapeutic for persistent infections in the immune-compromised populations still needs to be further investigated.


Subject(s)
Caco-2 Cells , Candida albicans/radiation effects , Humans , Interferon-gamma/therapeutic use , Intestinal Mucosa/microbiology , Intestinal Mucosa/pathology , Intestinal Mucosa/radiation effects , Salmonella typhimurium/classification , Salmonella typhimurium/radiation effects
4.
Pesqui. vet. bras ; 32(4): 279-283, Apr. 2012. tab
Article in English | LILACS, VETINDEX | ID: lil-626458

ABSTRACT

This study aimed to evaluate the interference of tuberculin test on the gamma-interferon (INFg) assay, to estimate the sensitivity and specificity of the INFg assay in Brazilian conditions, and to simulate multiple testing using the comparative tuberculin test and the INFg assay. Three hundred-fifty cattle from two TB-free and two TB-infected herds were submitted to the comparative tuberculin test and the INFg assay. The comparative tuberculin test was performed using avian and bovine PPD. The INFg assay was performed by the BovigamTM kit (CSL Veterinary, Australia), according to the manufacturer's specifications. Sensitivity and specificity of the INFg assay were assessed by a Bayesian latent class model. These diagnostic parameters were also estimate for multiple testing. The results of INFg assay on D0 and D3 after the comparative tuberculin test were compared by the McNemar's test and kappa statistics. Results of mean optical density from INFg assay on both days were similar. Sensitivity and specificity of the INFg assay showed results varying (95% confidence intervals) from 72 to 100% and 74 to 100% respectively. Sensitivity of parallel testing was over 97.5%, while specificity of serial testing was over 99.7%. The INFg assay proved to be a very useful diagnostic method.(AU)


O presente estudo avalia a interferência do teste de tuberculinização no teste do interferon gama (INFg), estima a sensibilidade e a especificidade do INFg em condições brasileiras e simula a utilização dos testes múltiplos usando a tuberculinização comparada e o teste do INFg. Trezentos e cinquenta animais oriundos de dois rebanhos livres e dois rebanhos positivos foram submetidos à tuberculinização comparada e ao teste de INFg. A tuberculinização comparada foi realizada utilizando PPD aviária e bovina. O teste de INFg foi realizado utilizando o kit Bovigam® (CSL Veterinary, Austrália) de acordo com as especificações do fabricante. A sensibilidade e especificidade do teste de INFg foram calculadas pelo Modelo Bayesiano de Classe Latente. Esses parâmetros foram também estimados para os testes múltiplos. Os resultados do teste de INFg no D0 e D3 após o teste de tuberculinização foram comparados pelos testes estatísticos de McNemar e kappa. Os resultados das médias de densidade ótica do teste de INFg em ambos os dias foram similares. A sensibilidade e a especificidade do teste de INFg apresentaram resultados variando (95% intervalo de confiança) de 72 a 100% e 74 a 100%, respectivamente. A sensibilidade do teste em paralelo foi acima de 97,5% enquanto a especificidade do teste em série foi acima de 99,7%. O teste do INFg provou ser um método de diagnóstico muito útil.(AU)


Subject(s)
Animals , Cattle , Tuberculin Test/veterinary , Predictive Value of Tests , Interferon-gamma/therapeutic use , Tuberculin , Serologic Tests/veterinary , Mycobacterium avium/isolation & purification
5.
GEN ; 65(4): 313-317, dic. 2011. ilus
Article in Spanish | LILACS | ID: lil-664166

ABSTRACT

La adherencia o cumplimiento terapéutico es la realización del tratamiento de la hepatitis C con dosis suficientes de Interferon pegilado y Ribavirina durante el tiempo previsto, es decir 80% de las dosis inicialmente indicada, en el 80% del tiempo establecido. El objetivo de esta investigación fue determinar la adherencia al tratamiento en el grupo seleccionado, el cumplimiento de la terapia depende de varios factores que incluyen: paciente, efectos colaterales, personal médico y paramédico y todo aquello que impida reducir dosis o interrumpir la terapia. En este trabajo se revisaron 41 historias del archivo interno de la consulta de hígado del Hospital Miguel Pérez Carreño a quien se le indico tratamiento con Peg-Interferon y RBV por diagnostico de Hepatitis C, independientemente del genotipo. Se tomaron en cuenta los siguientes parámetros: sexo, edad, morbilidad asociada, efectos colaterales, motivo para suspender terapia, % de pacientes que culminaron tratamiento, etc. Se utilizo procesador Word y Excel, y análisis estadístico simple. El hallazgo primordial fue que aproximadamente solo el 29% culmino la terapia. La conclusión de esta revisión es entender la importancia de profundizar la relación médico-paciente y la conformación del equipo multidisciplinario como punto indispensable para lograr la adherencia al tratamiento y por ende una respuesta viral sostenida, objetivo primordial de la terapia.


Adherence or compliance to therapy is to apply the treatment for Hepatitis C, with the maximum dosage of Pegylated Interferon and Ribavirin along the foreseen period, i.e. 80% of the dosage initially prescribed during 80% of the established time. The completion of this objective depends on numerous factors: 1. Relating to Patients: a) patient’s education and understanding to realize the consequences of the disease and b) encouraging the patient to comply with the therapy. 2. Inherent to the treatment itself: a) appropriate management of adverse effects and b) drug tolerance of the patient. 3. Setting up a multidisciplinary team: medical doctor, nurse, psychologist, hematologist, etc. which positively influence the attitude of patient preventing dose reduction and drop-out of therapy. In this paper we reviewed 41 patient’s medical records from the internal archive of the Hepatic Department, Miguel Pérez Carreño Hospital. Those patients were treated with Peg-Interferon and RBV (Ribavirin) due to Hepatitis C diagnosis, independently on the genotype. The following parameters were taken into account: gender, age, associate morbidity, side effects, reasons for suspending therapy, % of patients who completed therapy, etc. Word processor and Excel were used and the simple statistical analysis. With the fundamental finding that, approximately, only the 29% of patients culminated the therapy. Reviewing this series allowed us to assess the importance of deepen the doctor-patient relationship, as well as setting up a multidisciplinary team, as an essential point in order to achieve the adherence to treatment and, therefore, a sustained viral response: the paramount objective of the therapy.


Subject(s)
Humans , Male , Female , Drug Resistance, Viral , Hepatitis C/diagnosis , Hepatitis C/pathology , Hepatitis C/therapy , Interferon-gamma/therapeutic use , Ribavirin/therapeutic use , Gastroenterology
6.
Rev. cuba. pediatr ; 80(3)jul.-sept. 2008. ilus
Article in Spanish | LILACS | ID: lil-505519

ABSTRACT

La linfadenitis supurada es una complicación poco frecuente que sigue a la vacunación con bacilo de Calmette-Guerin. Se describen los casos de dos niños con reacciones adversas graves inducidas por esta vacuna, en ambos casos, linfadenitis regional supurada y abscedada, un mes después de nacidos. Después de cursos infructuosos de cirugía y quimioterapia, ambos recibieron interferón gamma recombinante por vía intramuscular, en una dosis inicial de 50 000 UI/kg (máximo: 1 000 000 UI), diariamente durante las primeras 4 semanas, y se disminuyó luego la frecuencia de administración. Esta citoquina fue bien tolerada, solo se presentaron complicaciones con fiebre, que fueron controladas bien con antipiréticos. El interferón gamma recombinante puede constituir una nueva y efectiva alternativa terapéutica para el tratamiento de la linfadenitis supurada causada por este bacilo.


Suppurative lymphadenitis is a non frequent complication following Bacillus Calmette-Guerin (BCG) vaccination. Two paediatric patients with adverse reactions induced by the BCG vaccine are presented, both with suppurative and abscessed regional lymphadenitis, one month after birth. After failed courses of surgery and chemotherapy, they were treated with 50 000 IU/Kg (maximum: 1 000 000 IU) of recombinant interferon (IFN) gamma, intramuscularly, daily during 4 weeks and 3 or 2 tpw afterwards. The first case, a nursing girl with family history of tuberculosis, had a rapid involution of the lesions since the first month of treatment, with drainage ceasing and gradual disappearance of the inflammatory signs. At the end of the 6 months of treatment, residues of the lesions were imperceptible and new adenopathies or relapses were not detected during 4 years of follow up. The second case, a boy without family history of tuberculosis, presented more lesions. The signs of marked improvement were observed in the whole affected region one year after IFN gamma started. Their treatment was extended for almost 2 years, when the scars took the normal skin pigmentation. The cytokine was well tolerated; few febrile events were recorded, well-controlled with antipyretics. We can conclude that IFN gamma could be a new effective therapeutic alternative for the treatment of the suppurated lymphadenitis caused by BCG vaccination.


Subject(s)
Humans , Child , Interferon-gamma/therapeutic use , Lymphadenitis/complications , BCG Vaccine/adverse effects , Case Reports
7.
Indian J Exp Biol ; 2005 May; 43(5): 414-9
Article in English | IMSEAR | ID: sea-56487

ABSTRACT

The significant insights into the immunobiology of central nervous system (CNS) and brain tumor have opened up the feasibility of applying 'Immunotherapy' as an alternative to the poor prognosis of malignant brain tumor with conventional therapeutic approaches. Though cytokines like IL-2 and IFN-gamma used against glioma showed some favorable results by eliciting Th1 type immune response, a proper immunotherapeutic agent is still to be searched for. Sheep erythrocyte (SRBC), a corpuscular antigen showed a better therapeutic efficacy in terms of enhanced survival and augmentation of cell mediated immunity (CMI) in a glioma model developed by chemical carcinogen ethyl nitrosourea. Histological findings revealed most efficient glioma rejection in SRBC and combination biological response modifier (BRM) treated groups. Simultaneously E-rosetting, cytotoxicity of lymphocytes, phagocytosis and antigen presenting capacity of myeloid cells established the better therapeutic efficacy of SRBC alone than other BRMs viz. IL-2 and IFN-gamma. Even the effect of combination therapy of different BRMs showed marginal differences in facilitating glioma reduction than the single use of SRBC. These findings emphasized the application of SRBC as an exogenous BRM having the potential as a rational therapeutic adjunct against glioma.


Subject(s)
Animals , Brain Neoplasms/drug therapy , Cell Survival , Erythrocytes , Glioma/drug therapy , Immunologic Factors/therapeutic use , Interferon-gamma/therapeutic use , Interleukin-2/therapeutic use , Rats , Sheep
8.
Yonsei Medical Journal ; : 161-171, 2001.
Article in English | WPRIM | ID: wpr-195981

ABSTRACT

The avoidance of incriminated foods is one of the principal therapies for atopic dermatitis (AD). Recently, interferon (IFN)-gamma therapy has been tried in AD with limited success. The necessity of diet therapy for the success of IFN-gamma therapy in AD was evaluated. A total of 524 AD patients participated in this study and 316 patients among them were entered into open food challenge tests. As the first step, an elimination diet was administered to 43 AD patients and 30 AD patients were enrolled as an untreated control group. As the second step, 45 AD patients were treated by both IFN-gamma therapy and elimination diet alone, 30 AD patients by elimination diet alone, 50 AD patients by IFN-gamma therapy, and 43 AD patients as controls. Clinical severity reduced significantly by using only the elimination diet in 58.1% patients with varying degrees of AD. Elimination diet improved the clinical results of IFN-gamma therapy in AD. In regard to the food challenge test, 77.8% of AD patients showed an adverse reaction to at least one food. Diet therapy itself had therapeutic effects on AD and an elimination diet might be essential for the success of IFN-gamma therapy in AD.


Subject(s)
Adult , Child , Child, Preschool , Female , Humans , Male , Adolescent , Dermatitis, Atopic/drug therapy , Dermatitis, Atopic/diet therapy , Food Hypersensitivity/diet therapy , Interferon-gamma/therapeutic use , Treatment Outcome
9.
Rev. Fac. Odontol. Univ. Antioq ; 11(1): 69-74, jul.-dic. 1999. tab
Article in Spanish | LILACS | ID: lil-264529

ABSTRACT

Los individuos inmunocomprometidos frecuentemente presentan afección del sistema estomatológico, requiriendo la participación del odontólogo para una atención integral que preserve la cavidad bucal en buenas condiciones, posibilitando una adecuada nutrición y evirtando la diseminación de infecciones desde este sistema. El síndrome de Hiper-IgE (SHIEIR) es una inmunodeficiencia primaria poco frecuente, caracterizada por concentraciones séricas elevadas de IgE, asociadas a la presencia de abscesos recurrentes de tejidos superficiales y profundos debidos especialmente a Staphylococcus aureus. Un análisis reciente de 30 pacientes con SHIEIR y 50 de sus familiares, lo ha caracterizado como un desorden multisistémico que afecta el sistema inmune, la piel, la dentición, el esqueleto y el tejido conjuntivo. Desde el punto de vista odontológico, se ha reportado un retardo en la exfoliación y erupción dentariaas, pero otras manifestaciones en el sistema estomatológico han sido analizadas en detalle y sólo se reportaron superficialmente, como son la presencia de dientes supernumerarios y la candidiasis bucal recurrente. Se plantea la participación del odontólogo en el diagnóstico y tratamiento de las manifestaciones orales de los pacientes con esta inmunodeficiencia, como una parte importante del abordaje integral que tiene gran valor en la evolución de los pacientes con inmunocompromiso


Subject(s)
Humans , Male , Female , Tooth Abnormalities/diagnosis , Tooth Abnormalities/therapy , Immunoglobulin E/immunology , Mouth Diseases/etiology , Job Syndrome/complications , Job Syndrome/epidemiology , Ascorbic Acid/administration & dosage , Anti-Bacterial Agents/therapeutic use , Candidiasis, Oral/etiology , Tooth Eruption/physiology , Interferon-gamma/therapeutic use , Job Syndrome/drug therapy , Immunologic Deficiency Syndromes/diagnosis , Immunologic Deficiency Syndromes/pathology , Staphylococcus aureus/pathogenicity , Tooth, Supernumerary/etiology
10.
Rio de Janeiro/Belo Horizonte; s.n; 1999. x,110 p. ilus.
Thesis in Portuguese | LILACS | ID: lil-536122

ABSTRACT

Estudamos o papel da degradação do triptofano pela indoleamina 2,3-dioxigenase (INDO) no controle da replicação do T. cruzzi ou T. gondii em fibroblastos e macrófagos humanos estimulados com rIFN-gama e/ou rTNF-alfa. O T. gondii foi utlizado como controle, por ser sensível à degradação do triptofano induzida pelo rIFN-gama. A estimulação de fibroblastos humanos com rIFN-gama e o rTNF-alfa inibiu consideravelmente o desenvolvimento do T. gondii, mas não influenciou o desenvolvimento do T. cruzi. O desenvolvimento do T. gondii foi triptofano dependente, enquanto que o do T. cruzi foi triptofano independente. Ao contrário dos fibroblastos parentais, os fibroblastos defectivos na via de transdução de sinal do IFN-gama (JAKI, JAK2 e STAT1alfa) não modularam o desenvolvimento intracelular de T. gondii e nem expressaram mRNA da INDO quando estimulados pelo rIFN-gama. Houve uma pequena indução de mRNA da INDO em fibroblastos parentais e mutantes (JAK2) estimulados com rTNF-alfa, que provavelmente foi estimulado através da indução da síntese de IFN-es em fibroblastos humanos. O rIFN-gama e/ou rTNF-alfa induziram expressiva atividade tripanosomicida em macrófagos humanos. A estimulação de macrófagos humanos com rIFN-gama ou rIFN-gama + rTNF-alfa, produziu uma considerável expressão do mRNA da INDO, e pouca expressão foi detectada quando as células foram estimuladas apenas com rTNF-alfa. A adição de triptofano, ou do inibidor da INDO, norharmane, à cultura de macrófagos humanos ativados com rIFN-gama e/ou rTNF-alfa, não reverteu a inibição do crescimento do parasita, mostrando que a degradação do triptofano não é um mecanismo responsável pelo efeito tripanosomicida de macrófagos humanos ativados com rIFN-gama e/ou rTNF-alfa. Os catabólitos do triptofano (ácido quinolínico, ácido quinurênico e L-quinurenina) inibiram parcialmente o desenvolvimento do T. cruzi em macrófagos humanos. A amplificação por PCR do DNA T. cLsintese de Escherichia coli ou Neurospora crassa e Saccharomyces cerevisae e a hibridização cruzada via dot blot utilizando como sondas os produtos de PCR, sugerem a possibilidade da existência da enzima triptofano sintetase em T. cruzi, o que explicaria a insensibilidade do parasita à depleção do triptofano. Alternativamente reconhecemos que mais estudos devam ser feitos para a comprovação da existência da enzima em T. cruzi.


Subject(s)
Chagas Disease/diagnosis , Toxoplasma/parasitology , Toxoplasma/pathogenicity , Trypanosoma cruzi/enzymology , Trypanosoma cruzi/parasitology , Fibroblasts/parasitology , Interferon-gamma/therapeutic use , Macrophages/parasitology , Receptors, Interferon/therapeutic use , Tryptophan/metabolism , Tryptophan/therapeutic use
11.
Rio de Janeiro/Belo Horizonte; s.n; 1999. x, 110 p. ilus.
Thesis in Portuguese | LILACS, ColecionaSUS | ID: biblio-933761

ABSTRACT

Estudamos o papel da degradação do triptofano pela indoleamina 2,3-dioxigenase (INDO) no controle da replicação do T. cruzzi ou T. gondii em fibroblastos e macrófagos humanos estimulados com rIFN-gama e/ou rTNF-alfa. O T. gondii foi utlizado como controle, por ser sensível à degradação do triptofano induzida pelo rIFN-gama. A estimulação de fibroblastos humanos com rIFN-gama e o rTNF-alfa inibiu consideravelmente o desenvolvimento do T. gondii, mas não influenciou o desenvolvimento do T. cruzi. O desenvolvimento do T. gondii foi triptofano dependente, enquanto que o do T. cruzi foi triptofano independente. Ao contrário dos fibroblastos parentais, os fibroblastos defectivos na via de transdução de sinal do IFN-gama (JAKI, JAK2 e STAT1alfa)não modularam o desenvolvimento intracelular de T. gondii e nem expressaram mRNA da INDO quando estimulados pelo rIFN-gama. Houve uma pequena indução de mRNA da INDO em fibroblastos parentais e mutantes (JAK2) estimulados com rTNF-alfa, que provavelmente foi estimulado através da indução da síntese de IFN-es em fibroblastos humanos. O rIFN-gama e/ou rTNF-alfa induziram expressiva atividade tripanosomicida em macrófagos humanos.


A estimulação de macrófagos humanos com rIFN-gama ou rIFN-gama + rTNF-alfa, produziu uma considerável expressão do mRNA da INDO, e pouca expressão foi detectada quando as células foram estimuladas apenas com rTNF-alfa. A adição de triptofano, ou do inibidor da INDO, norharmane, à cultura de macrófagos humanos ativados com rIFN-gama e/ou rTNF-alfa, não reverteu a inibição do crescimento do parasita , mostrando que a degradação do triptofano não é um mecanismo responsável pelo efeito tripanosomicida de macrófagos humanos ativados com rIFN-gama e/ou rTNF-alfa. Os catabólitos do triptofano (ácido quinolínico, ácido quinurênico e L-quinurenina)inibiram parcialmente o desenvolvimento do T. cruzi em macrófagos humanos. A amplificação por PCR do DNA T. cLsintese de Escherichia coli ou Neurospora crassa e Saccharomyces cerevisae e a hibridização cruzada via dot blot utilizando como sondas os produtos de PCR, sugerem a possibilidade da existência da enzima triptofano sintetase em T. cruzi, o que explicaria a insensibilidade do parasita à depleção do triptofano. Alternativamente reconhecemos que mais estudos devam ser feitos para a comprovação da existência da enzima em T. cruzi


Subject(s)
Plants, Medicinal/chemistry , Toxoplasma/parasitology , Toxoplasma/pathogenicity , Trypanosoma cruzi/enzymology , Trypanosoma cruzi/parasitology , Fibroblasts/parasitology , Interferon-gamma/therapeutic use , Macrophages/parasitology , Receptors, Interferon/therapeutic use , Tryptophan/metabolism , Tryptophan/therapeutic use
12.
An. bras. dermatol ; 73(supl. 2): 35-8, jul.-ago. 1998.
Article in Portuguese | LILACS | ID: lil-222217

ABSTRACT

Revisäo dos conhecimentos atuais sobre a terapêutica da dermatite atópica, discutindo as principais opçöes com a finalidade de se chegar ao consenso sobre o assunto.


Subject(s)
Humans , Dermatitis, Atopic/etiology , Dermatitis, Atopic/drug therapy , Dermatitis, Atopic/therapy , Interferon-gamma/therapeutic use , Prednisone/therapeutic use
14.
Arch. argent. dermatol ; 47(2): 53-66, mar.-abr. 1997. ilus
Article in Spanish | LILACS | ID: lil-196996

ABSTRACT

La leshmaniasis es producida por un protozoo, trasmitida por muchos mosquitos hematófagos (Lutzomia brasiliensis), artrópodos (Rhipicephalus turanicus) y probablemente triatomideos (Triatoma infestans, Pansterongilus infestans). En Bolivia existen tres formas de leishmaniasis: cutánea, mucocutánea y visceral, producidas por el mismo agente etiológico, con tres diferentes fases evolutivas relacionadas con mecanismos inmunológicos dependientes de muchos factores. Las tres responden a diversas drogas, a veces inespecíficas, que son empleadas para otras enfermedades (plasmodios, trichomonas, giardias, hongos y bacilos de Koch). Las sales antimoniales pentavalentes son las más comúnmente usadas, con resultados variables, a veces adversos, por su toxicidad, ineficacia ineficiencia y, sobre todo, resistencia y difícil manejo. Se ha demostrado que la L. cutánea tratada con glucantime, anfotericina B y otros presenta posteriormente lesiones mucocutáneas. Por otro lado, leishmaniosos que curaron espontáneamente han mostrado lesiones secundarias en forma ocasional. Lo que demuestra que en esta enfermedad existe una falla inmunológica, razón por la que usamos un inmunomodulador (DECARIS-clorhidrato de levamisol-, que es un antiparasitario), con buenos resultados (95 por ciento de éxito), sobre todo por su bajo costo, uso cómodo y efectos colaterales mínimos. Finalmente concluimos que en el momento actual no existe un leishmanicida eficaz para el tratamiento de esta enfermedad. El tratamiento inmunológico parece ser muy prometedor


Subject(s)
Humans , Allopurinol/therapeutic use , Antimony Sodium Gluconate/therapeutic use , Leishmaniasis, Cutaneous/drug therapy , Leishmaniasis, Mucocutaneous/drug therapy , Leishmaniasis/drug therapy , Levamisole/therapeutic use , Allopurinol/administration & dosage , Antimony Sodium Gluconate/administration & dosage , Antimony Sodium Gluconate/adverse effects , Antiparasitic Agents/therapeutic use , Bolivia/epidemiology , Diagnosis, Differential , Disease Vectors/classification , Interferon-gamma/administration & dosage , Interferon-gamma/therapeutic use , Itraconazole/administration & dosage , Itraconazole/therapeutic use , Leishmaniasis, Cutaneous/diagnosis , Leishmaniasis, Cutaneous/immunology , Leishmaniasis, Mucocutaneous/diagnosis , Leishmaniasis, Mucocutaneous/immunology , Leishmaniasis/pathology , Leishmaniasis/transmission , Leishmania/classification , Levamisole/administration & dosage , Metronidazole/administration & dosage , Metronidazole/therapeutic use
15.
Dermatol. rev. mex ; 40(4): 268-72, jul.-ago. 1996.
Article in Spanish | LILACS | ID: lil-181589

ABSTRACT

En el presente artículo se revisan reportes de la literatura referentes a avances recientes en la terapéutica dermatológica, enfatizando los relativos a procedimientos quirúrgicos, enfermedades infecciosas y parasitarias observadas en nuestro medio


Subject(s)
Humans , Male , Female , Middle Aged , Acne Vulgaris/drug therapy , Interferon-gamma/therapeutic use , Leishmania , Skin Diseases/drug therapy , Skin Diseases/microbiology , Skin Diseases/parasitology , Skin Diseases/surgery
17.
Rev. Inst. Med. Trop. Säo Paulo ; 37(5): 391-6, set.-out. 1995. tab
Article in English | LILACS | ID: lil-165505

ABSTRACT

Se evaluo la efectividad del interferon-µ (IFN-µ) recombinante de rata en un modelo experimental de criptococosis desarollado en ratones Balb/C inoculados por via intraperitoneal con la cepa Rivas de Cryptococcus neoformas (C. neoformans). Se tuvieron en cuenta el tiempo de sobrevida de los animales, el aspecto macroscopico de los organos en la autopsia, la presencia de levaduras capsuladas en los tejidos y la siembra masiva de un homogenato de cerebro. El tratamiento con IFN-µ, en dosis diarias de 10.000 UI, no modifico estos parametros cuando la dosis infectante fue de 10 indice 7 levaduras y el tratamiento se retardo 5 dias post-infeccion (media de sobrevida de 21 vs. 23 dias en los grupos de control y tratados con IFN-µ, respectivamente)...


Subject(s)
Animals , Male , Mice , Cryptococcosis/therapy , Interferon-gamma/therapeutic use , Murine Acquired Immunodeficiency Syndrome/therapy , Drug Evaluation/methods , Mice, Inbred Strains , Cryptococcus neoformans/analysis
18.
Rev. bras. alergia imunopatol ; 18(3): 108-17, maio-jun.1995. ilus, tab
Article in Portuguese | LILACS | ID: lil-154259

ABSTRACT

Therapy with rIFN-ç did not cause an induction of NO synthesis by neutrophils or mononuclear cells from CGD patients, nor changed any of the immunological parameters of these patients. These results indicate that O2- production is not essential for NO synthesis in human leukocytes and that therapy with rIFN-ç in CGD patients does not induces NO synthesis by their leucocytes. The mechanisms by which rIFN-ç therapy produces clinical improvement remain to be investigated


Subject(s)
Humans , Granulomatous Disease, Chronic/therapy , Interferon-gamma/therapeutic use , Interferon-gamma/pharmacokinetics , Interferon-gamma/pharmacology , Leukocytes, Mononuclear/drug effects , Neutrophils , Nitric Oxide/pharmacokinetics , Nitric Oxide/pharmacology
19.
An. bras. dermatol ; 70(2): 103-7, mar.-abr. 1995. ilus
Article in Portuguese | LILACS | ID: lil-175825

ABSTRACT

Fundamento - A leishmaniose tegumentar americana é endêmica no Nordeste brasileiro. Objetivo - Contribuir com mais uma avaliaçäo do itraconazol enquanto agente terapêutico contra a leishmaniose. Método - Vinte e seis pacientes do sexo masculino, com idade entre 18 e vinte anos, com período médio de três meses de doença foram incluídos no estudo. Como meio de diagnóstico foram usados anamnese e aspecto clínico da lesäo, pesquisa direta da leishmania na lesäo, reaçäo de Montenegro e imunofluorescência indireta. Todos os pacientes receberam 100mg/dia de itraconazol, por via oral, durante sessenta dias, tendo apenas um necessitado complementaçäo por mais trinta dias. Resultados - Foi obtida regressäo total das lesöes nos 26 pacientes, com seguimento de nove meses sem alteraçöes. Conclusäo - Considera-se o itraconazol mais uma opçäo terapêutica contra a leishmaniose


Subject(s)
Humans , Male , Adult , Itraconazole/therapeutic use , Leishmania/parasitology , Leishmaniasis, Cutaneous/diagnosis , Leishmaniasis, Cutaneous/epidemiology , Leishmaniasis, Cutaneous/drug therapy , Fluorescent Antibody Technique , Glycoproteins/administration & dosage , Interferon-gamma/therapeutic use , Leishmaniasis/classification
20.
Infectol. microbiol. clin ; 7(6): 138-43, 1995.
Article in Spanish | LILACS | ID: lil-189380

ABSTRACT

Chlamydia trachomatis biovar TRIC es un microorganismo procariota de parasitismo intracelular obligado que infecta las células del epitelio escamoso columnar de las membranas mucosas. En la patogenia de las infecciones producidas por Chlamydia trachomatis están involucrados mecanismos de hipersensibilidad con la participación de linfocitos T citotóxicos, macrófagos e interleuquinas en respuesta a proteínas de shock térmico producidas por el microorganismo. El espectro de patologías incluye infecciones oculares como tracoma y paratracoma; infecciones genitales femeninas asintomáticas y sintomáticas que derivan en infertilidad por obstrucción tubaria, preñez ectópica o infecciones neonatales; infecciones masculinas asintomáticas y sintomáticas como causa probable de infertilidad masculina. La alta prevalencia de Chlamydia trachomatis requiere un análisis de la situación epidemiológica de cada región y la elaboración de programas de salud para su control.


Subject(s)
Humans , Chlamydia Infections/immunology , Chlamydia trachomatis/pathogenicity , Interferon-gamma/therapeutic use , Arthritis, Reactive/immunology , Chlamydia Infections/classification , Chlamydia Infections/physiopathology , Chlamydia trachomatis/drug effects , Chlamydia trachomatis/ultrastructure
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