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Thyroid hormonal disturbances related to treatment of hepatitis C with interferon-alpha and ribavirin

DANILOVIC, Debora Lucia Seguro; MENDES-CORREA, Maria Cassia; CHAMMAS, Maria Cristina; ZAMBRINI, Heverton; MARUI, Suemi
Fonte: Faculdade de Medicina / USP Publicador: Faculdade de Medicina / USP
Tipo: Artigo de Revista Científica
ENG
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OBJECTIVE: To characterize thyroid disturbances induced by interferon-alpha and ribavirin therapy in patients with chronic hepatitis C. INTRODUCTION: Interferon-alpha is used to treat chronic hepatitis C infections. This compound commonly induces both autoimmune and non-autoimmune thyroiditis. METHODS: We prospectively selected 26 patients with chronic hepatitis C infections. Clinical examinations, hormonal evaluations, and color-flow Doppler ultrasonography of the thyroid were performed before and during antiviral therapy. RESULTS: Of the patients in our study, 54% had no thyroid disorders associated with the interferon-alpha therapy but showed reduced levels of total T3 along with a decrease in serum alanine aminotransferase. Total T4 levels were also reduced at 3 and 12 months, but free T4 and thyroid stimulating hormone (TSH) levels remained stable. A total of 19% of the subjects had autoimmune interferon-induced thyroiditis, which is characterized by an emerge of antithyroid antibodies or overt hypothyroidism. Additionally, 16% had non-autoimmune thyroiditis, which presents as destructive thyroiditis or subclinical hypothyroidism, and 11% remained in a state of euthyroidism despite the prior existence of antithyroidal antibodies. Thyrotoxicosis with destructive thyroiditis was diagnosed within three months of therapy...

Interferon-gamma and interleukin-10 production by mononuclear cells from patients with advanced head and neck cancer

Conti-Freitas, Luiz C.; Foss-Freitas, Maria C.; Mamede, C. M.; Foss, Norma T.
Fonte: HOSPITAL CLINICAS, UNIV SAO PAULO; SAO PAULO Publicador: HOSPITAL CLINICAS, UNIV SAO PAULO; SAO PAULO
Tipo: Artigo de Revista Científica
ENG
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OBJECTIVE: This study aims to evaluate the production of interferon-gamma and interleukin-10 by stimulated peripheral blood mononuclear cells isolated from patients with supraglottic laryngeal cancer before and after surgical treatment. METHODS: Fourteen patients with advanced supraglottic laryngeal cancer were studied. Cultures of peripheral blood mononuclear cells isolated during the preoperative and late postoperative periods were stimulated with concanavalin A and Bacille Calmette-Guerin, and the supernatant concentrations of interferon-gamma and interleukin-10 were measured. RESULTS: For non-stimulated cultures, the interferon-gamma levels produced by the preoperative period and the late postoperative period cultures were lower than the levels produced by the control group cultures. The interferon-gamma levels after stimulation with concanavalin A were higher in the late postoperative period cultures than in the preoperative evaluation cultures. Stimulation with Bacille Calmette-Guerin led to the production of similar levels of interferon-gamma and interleukin-10 by all cultures; thus, stimulation increased the levels of interferon-gamma produced by both the preoperative and postoperative cultures relative to the levels produced by the corresponding unstimulated cultures. CONCLUSION: Patients with advanced supraglottic laryngeal cancer exhibit an in vitro deficiency in interferongamma secretion by mononuclear cells. Stimulated cells seem to recover this function during the postoperative period.

Interferon-gamma and interleukin-10 production by mononuclear cells from patients with advanced head and neck cancer

Conti-Freitas, Luiz C.; Foss-Freitas, Maria C.; Mamede, Rui C. M.; Foss, Norma T.
Fonte: Faculdade de Medicina / USP Publicador: Faculdade de Medicina / USP
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
36.57%
OBJECTIVE: This study aims to evaluate the production of interferon-gamma and interleukin-10 by stimulated peripheral blood mononuclear cells isolated from patients with supraglottic laryngeal cancer before and after surgical treatment. METHODS: Fourteen patients with advanced supraglottic laryngeal cancer were studied. Cultures of peripheral blood mononuclear cells isolated during the preoperative and late postoperative periods were stimulated with concanavalin A and Bacille Calmette-Guerin, and the supernatant concentrations of interferon-gamma and interleukin-10 were measured. RESULTS: For non-stimulated cultures, the interferon-gamma levels produced by the preoperative period and the late postoperative period cultures were lower than the levels produced by the control group cultures. The interferon-gamma levels after stimulation with concanavalin A were higher in the late postoperative period cultures than in the preoperative evaluation cultures. Stimulation with Bacille Calmette-Guerin led to the production of similar levels of interferon-gamma and interleukin-10 by all cultures; thus, stimulation increased the levels of interferon-gamma produced by both the preoperative and postoperative cultures relative to the levels produced by the corresponding unstimulated cultures. CONCLUSION: Patients with advanced supraglottic laryngeal cancer exhibit an in vitro deficiency in interferongamma secretion by mononuclear cells. Stimulated cells seem to recover this function during the postoperative period.

Analise funcional da proteina humana codificada pelol novo gene de resposta a interferon ISG95; Functional analysis of the human protein encoded by the new interferon stimulated gene ISG95

Thais Haline Vaz
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 14/08/2008 PT
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36.62%
A resposta individual das células está na base da resistência do organismo à infecção viral. O principal mecanismo de resistência envolve a participação de inúmeros genes da via de sinalização dos interferons. Vários estudos vêm sendo conduzidos em larga escala para identificar genes que respondem aos mais variados tratamentos, assim como clusters gênicos relacionados a determinadas enfermidades, como a leucemia. A função do produto de muitos destes genes ainda não foi caracterizada. Numa ampla revisão destes artigos identificamos a proteína KIAA0082/ISG95 respondendo a interferon, à infecção pelo vírus da hepatite C (HCV), ao tratamento celular com oligodeoxinucleotídeos CpG, fazendo parte de um cluster de genes relacionados à leucemia e sendo super-expressa em linfócitos T ativados. Embora não possua função conhecida, esta proteína apresenta quatro domínios que indicam uma possível atividade relacionada ao metabolismo de RNA. Neste trabalho demonstramos que o promotor do gene ISG95 responde à estimulação por interferon num sistema repórter em células Vero. As atividades bioquímicas de ISG95 foram determinadas usando a proteína recombinante expressa em células de inseto Sf9. ISG95 interage com RNA e com S-adenosilmetionina...

Clinical and serological manifestations associated with interferon-alpha levels in childhood-onset systemic lupus erythematosus

Postal, Mariana; Sinicato, Nailu Angelica; Pelicari, Karina Oliveira; Marini, Roberto; Lavras Costallat, Lilian Tereza; Appenzeller, Simone
Fonte: Hospital Clinicas, Univ Sao Paulo; Sao Paulo Publicador: Hospital Clinicas, Univ Sao Paulo; Sao Paulo
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
36.64%
OBJECTIVE: To determine the serum levels of interferon alpha in childhood-onset systemic lupus erythematosus patients, their first-degree relatives and healthy controls and to evaluate the associations between serum interferon alpha and disease activity, laboratory findings and treatment features. METHODS: We screened consecutive childhood-onset systemic lupus erythematosus patients in a longitudinal cohort at the pediatric rheumatology unit of the State University of Campinas between 2009 and 2010. All patients demonstrated disease onset before the age of 16. Disease status was assessed according to the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI) and Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index (SDI). Interferon alpha levels were measured using an enzyme-linked immunoabsorbent assay. RESULTS: We included 57 childhood-onset systemic lupus erythematosus patients (mean age 17.33 +/- 4.50), 64 first-degree relatives (mean age 39.95 +/- 5.66), and 57 healthy (mean age 19.30 +/- 4.97) controls. Serum interferon alpha levels were significantly increased in childhood-onset systemic lupus erythematosus patients compared to their first-degree relatives and healthy controls. Interferon alpha levels were significantly increased in patients with positive dsDNA antibodies...

Retinopatia em paciente portador de hepatite C tratado com interferon peguilado e ribavirina: relato de caso

Ávila,Marcos Pereira de; Freitas,André Moraes; Isaac,David Leonardo Cruvinel; Bastos,André Luis de Moura; Pena,Rafael Valadares
Fonte: Conselho Brasileiro de Oftalmologia Publicador: Conselho Brasileiro de Oftalmologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2006 PT
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36.59%
O interferon é uma citocina imunomoduladora utilizada no tratamento de diversas doenças, incluindo infecções crônicas pelo vírus da hepatite C. O interferon peguilado é uma nova forma de interferon, desenvolvida para aumentar o tempo de meia-vida da droga. Uma série de efeitos adversos têm sido associados ao uso do interferon, dentre eles a toxicidade ocular com desenvolvimento de retinopatia. As lesões oculares típicas incluem exsudatos algodonosos e hemorragias retinianas no pólo posterior, particularmente em torno do disco óptico. Descrevemos o caso de paciente tratado com associação de interferon peguilado e ribavirina com diminuição da acuidade visual e quadro oftalmológico compatível com retinopatia associada ao interferon. Quatro semanas após a suspensão do interferon, houve melhora da acuidade visual e diminuição importante das alterações retinianas.

Some biological properties of the human amniotic membrane interferon

Ferreira,P. C. P.; Roque,L. de la; Rumjanek,V. M.; Golgher,R. R.
Fonte: Instituto Oswaldo Cruz, Ministério da Saúde Publicador: Instituto Oswaldo Cruz, Ministério da Saúde
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/1992 EN
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Human amniotic interferon was investigated to define the species specificity of its antiviral action and compare its anti-cellular and NK cell stimulating activities with those of other human interferons. The antiviral effect was titrated in bovine (RV-IAL) and monkey (VERO) cells. Amniotic interferon exhibited, in bovine cells, 5% of the activity seen in monkey cells, while alpha interferon displayed 200%. No effect was detected with either beta or gamma interferon in bovine cells. Daudi cells were exposed to different concentrations of various interferons and the cell numbers were determined. The anticellular effect of the amniotic interferon reached its peak on the third day of incubation. Results suggested a higher activity for alpha and gamma interferons and a lower activity for beta when compared to amniotic interferon. Using total mononuclear cells as effector cells and K 562 as target cell in a 51Cr release assay, it was demonstrated that low concentrations of amniotic interferon consistently stimulated NK cell activity in cells derived from several donors, the results indicating a higher level of activity with this interferon than with alpha and beta interferons.

Interferon therapy shifts natural killer subsets among egyptian patients with chronic hepatitis C

Fathy,Amal; Eldin,Mohamed Mohy; Metwally,Lobna; Eida,Mohamed; Abdel-Rehim,Marwa; Esmat,Gamal
Fonte: Brazilian Society of Infectious Diseases Publicador: Brazilian Society of Infectious Diseases
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2010 EN
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36.61%
Natural killer cells can be divided into five subpopulations based on the relative expression of CD16 and CD56 markers. The majority of natural killer cells are CD56dim, which are considered to be the main cytotoxic effectors. A minority of the natural killer cells are CD56bright, and function as an important source of immune-regulatory cytokines. Shifts of these subsets have been reported in patients with chronic hepatitis C virus infection. We sought to investigate the shift of natural killer subsets among Egyptian patients with chronic HCV and to analyze the influence of interferon therapy on this shift. We applied a flow cytometric analysis of peripheral blood natural killer subsets for 12 interferon-untreated and 12 interferon-treated patients with chronic HCV, in comparison to 10 control subjects. Among interferon-untreated patients, there was a significant reduction of CD56-16+ (immature natural killer) cells. Among interferon-treated patients, the absolute count of natural killer cells was reduced, with expansion of the CD56bright subset and reduction of the CD56dim16+ subset. Natural killer subset counts were not significantly correlated to HCV viral load and were not significantly different among interferon responders and non-responders. In conclusion...

Clinical and serological manifestations associated with interferon-α levels in childhood-onset systemic lupus erythematosus

Postal,Mariana; Sinicato,Nailu Angélica; Peliçari,Karina Oliveira; Marini,Roberto; Lavras Costallat,Lilian Tereza; Appenzeller,Simone
Fonte: Faculdade de Medicina / USP Publicador: Faculdade de Medicina / USP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2012 EN
Relevância na Pesquisa
36.64%
OBJECTIVE: To determine the serum levels of interferon alpha in childhood-onset systemic lupus erythematosus patients, their first-degree relatives and healthy controls and to evaluate the associations between serum interferon alpha and disease activity, laboratory findings and treatment features. METHODS: We screened consecutive childhood-onset systemic lupus erythematosus patients in a longitudinal cohort at the pediatric rheumatology unit of the State University of Campinas between 2009 and 2010. All patients demonstrated disease onset before the age of 16. Disease status was assessed according to the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI) and Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index (SDI). Interferon alpha levels were measured using an enzyme-linked immunoabsorbent assay. RESULTS: We included 57 childhood-onset systemic lupus erythematosus patients (mean age 17.33±4.50), 64 firstdegree relatives (mean age 39.95±5.66), and 57 healthy (mean age 19.30±4.97) controls. Serum interferon alpha levels were significantly increased in childhood-onset systemic lupus erythematosus patients compared to their firstdegree relatives and healthy controls. Interferon alpha levels were significantly increased in patients with positive dsDNA antibodies...

Cellular Mechanisms of Interferon Production

Vilček, Jan
Fonte: The Rockefeller University Press Publicador: The Rockefeller University Press
Tipo: Artigo de Revista Científica
Publicado em 01/07/1970 EN
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36.66%
Rabbit kidney cell cultures stimulated with either double-stranded polyinosinate-polycytidylate (poly I:poly C) or with ultraviolet-irradiated Newcastle disease virus (UV-NDV) produce two types of interferon response, designated "early" and "late," respectively. The early response is suppressed by inhibitors of RNA or protein synthesis and is therefore thought to represent de novo synthesis of interferon. Circumstantial evidence suggested that this interferon response is regulated by a translation control mechanism. Late interferon production with poly I:poly C only took place in the presence of inhibitors of RNA or protein synthesis. The late interferon is therefore likely to be derived by the activation of an interferon precursor. The stimulation of late poly I:poly C-induced interferon production by cycloheximide suggested the existence of a second, posttranslational level of control of interferon production. This posttranslation control seems to be activated by interferon. UV-NDV can probably suppress the synthesis of the posttranslation inhibitory protein, and therefore it stimulates a late interferon response in the absence of inhibitors of RNA or protein synthesis. It is postulated that both the translation and posttranslation inhibitor participate in the development of a cellular refractory state to repeated interferon stimulation. The picture of interferon which emerges from this study is one of a heterogenous class of proteins whose production is controlled by cellular repressors acting at various levels.

Interferon and Interferon Inducers in Protozoal Infections

Jahiel, Rene I.
Fonte: The Rockefeller University Press Publicador: The Rockefeller University Press
Tipo: Artigo de Revista Científica
Publicado em 01/07/1970 EN
Relevância na Pesquisa
36.68%
Several interferon inducers (Newcastle disease virus, statolon, and poly rI:poly rC) as well as exogenous mouse interferon protect mice from sporozoite-induced Plasmodium berghei malaria, as long as they are administered before the end of the preerythrocytic phase of development of the parasite. The protective effect of the interferon inducers was related to their interferon-inducing effect; the protective effect of the interferon preparations was related to the interferon titer of the preparations, and it exhibited other attributes of interferon such as species specificity. In contrast to sporozoite-induced infection, blood forms-induced P. berghei malaria was only weakly susceptible to the protective effect of interferon inducers. This difference may provide an approach to study the mechanism of protection. The growth in cell cultures of another intracellular protozoon, Toxoplasma gondii, is also inhibited by interferon (22). The fact that P. berghei and T. gondii (as well as another group of intracellular parasites susceptible to interferon, the Chlamydia) have their own ribosomes raises questions, concerning the role of host cell ribosomes in the host cell-parasite relationship of these intracellular parasites and in the mechanism of interferon action against them...

Circulating Interferon Production in the Mouse : Origin and nature of cells involved and influence of animal genotype

De Maeyer, Edward; De Maeyer-Guignard, Jaqueline; Jullien, Pierre
Fonte: The Rockefeller University Press Publicador: The Rockefeller University Press
Tipo: Artigo de Revista Científica
Publicado em 01/07/1970 EN
Relevância na Pesquisa
36.64%
A radiobiological study of circulating interferon production in the mouse was undertaken in the hope of elucidating the site(s) of circulating interferon production. After total body X-irradiation of the animals, different radiosensitivities of circulating interferon production were observed with different viral inducers. Myxovirus-induced circulating interferon production was especially radiosensitive. Moreover, a study of interferon production in syngeneic and xenogeneic radiochimeras demonstrated that cells producing NDV (Newcastle disease virus)-induced circulating interferon were derived from hematopoietic stem cells. In addition, treatment of mice with antilymphocyte serum significantly reduced NDV- and Sendai virus-induced circulating interferon, as opposed to other inducers. Taken together, these results strongly suggest that the lymphocyte is the major source of myxovirus-induced circulating interferon. A survey of interferon production in 12 inbred mouse strains, using NDV as inducer, revealed the existence of low and high producers. A Mendelian analysis carried out with low producing Balb/c and high producing C57BL indicated that the difference between low and high interferon producers was caused by a single, autosomal, codominant factor.

Alergia à proteína do leite de vaca em crianças: avaliação clínica e concentrações séricas de interferon- γ e interleucina- 4

das Graças Moura Lins, Maria; Eugenia Farias Almeida Motta, Maria (Orientador)
Fonte: Universidade Federal de Pernambuco Publicador: Universidade Federal de Pernambuco
Tipo: Outros
PT_BR
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36.59%
Introdução O diagnóstico da alergia à proteína do leite de vaca através de sintomas é bastante falível, representa mais ou menos a metade dos casos suspeitos. A produção e as concentrações do Interferon-γ e Interleucina-4 têm sido estudadas como sinalizadores das reações inflamatórias na alergia à proteína do leite de vaca em atividade e na tolerância oral com ações contrarreguladoras. Objetivos. 1- Determinar a frequência de alergia em crianças com sintomas de intolerância ao leite de vaca. 2 - Determinar as concentrações séricas do interferon-gama e da interleucina-4 em crianças com sintomas suspeitos de alergia à proteína do leite de vaca. Método. Foram estudada 65 crianças (2-84 meses), com intolerância ao leite de vaca, foram estudadas. Informações da história clínica, níveis e IgE total e específicas, Interferon-γ, Interleucina-4 e teste do desencadeamento alimentar oral, realizado para determinação das crianças com e sem alergia à proteína do leite de vaca foram registrados em formulário estruturado.Os sintomas entre os dois grupos foram analisados. As idades e citocinas foram sumarizadas como medianas e comparadas pelo teste de Mann-Whitney. As diferenças entre as variáveis categóricas foram determinadas pelo teste qui-quadrado. Os testes estatísticos foram considerados significantes com p< 0...

Interferon-α-2b and oral cytarabine ocfosfate for newly diagnosed chronic myeloid leukaemia; Interferon-alpha-2b and oral cytarabine ocfosfate for newly diagnosed chronic myeloid leukaemia

Mollee, P.; Arthur, C.; Hughes, T.; Januszewicz, H.; Grigg, A.; Bradstock, K.; Wolf, M.; Gibson, J.; Schwarer, A.; Spencer, A.; Browett, P.; Hawkins, T.; Seldon, M.; Herrmann, R.; Watson, A.; Seymour, J.; Martin, N.; Shina, S.; Low, C.; Wright, S.; et al.
Fonte: Oxford Univ Press Publicador: Oxford Univ Press
Tipo: Artigo de Revista Científica
Publicado em //2004 EN
Relevância na Pesquisa
36.61%
Background: Treatment with interferon and subcutaneous cytarabine produces superior cytogenetic responses in chronic myeloid leukaemia (CML) than treatment with interferon alone, but at the expense of greater toxicity. Cytarabine ocfosfate (YNK01) is an oral precursor of cytarabine that may overcome some of the inconvenience and toxicities associated with subcutaneous cytarabine administration. Patients and methods: We studied the efficacy and tolerability of combination therapy with interferon-α-2b and YNK01 in patients with newly diagnosed, untreated CML. Forty patients were treated with interferon-α-2b (5 MU/m2/day) plus monthly courses of YNK01 (600 mg/day for 10 days) for 1 year. Results: The 6-month complete haematological response rate was 63% and the 1-year major cytogenetic response rate was 30%, with 10% of cytogenetic responses being complete. With a median follow-up of 57 months, the estimated 5-year overall survival was 86% (95% confidence interval 70% to 94%). Treatment tolerability was poor, with toxicity leading to discontinuation of one or both drugs in 60% of cases. The median daily dose of interferon α-2b was 7.75 MU and the median dose of YNK01 was 600 mg/day for each 10-day treatment cycle. Conclusions: Interferon-α-2b and YNK01 produce cytogenetic responses comparable to those achieved with interferon-α-2b and parenteral cytarabine...

Morbus Behçet: Langzeitprognose nach Therapie mit Interferon alfa-2a; Behçet´s disease: Long-term prognosis after therapy with Interferon alpha-2a

Möhle, Antje Corinna
Fonte: Universidade de Tubinga Publicador: Universidade de Tubinga
Tipo: Dissertação
DE_DE
Relevância na Pesquisa
36.7%
1. Hintergrund Beim Morbus Behçet handelt es sich um eine Multisystemerkrankung mit dem histologischen Korrelat einer leukozytoklastischen Vaskulitis. Neben oralen und genitalen Aphthen, Hauteffloreszenzen und einer Oligoarthritis stehen Uveitiden im Vordergrund. Trotz immunsuppressiver Therapie ist die Visusprognose äußerst schlecht. Bei bis zu 74% der Patienten mit Augenbeteiligung resultiert nach 5 bis 10 Jahren ein Visus von 0,1 oder schlechter. Ein neuer Ansatz bei okulärem Morbus Behçet ist die Therapie mit Interferon alfa. Zielsetzung dieser Studie war es, die langfristige Visusentwicklung sowie Anzahl und Dauer der rezidiv-freien Intervalle bei Patienten mit schwerem okulärem Morbus Behçet, welche mit Interferon alfa-2a therapiert wurden, zu untersuchen. 2. Methoden Es wurden 96 Augen von 53 Patienten mit Morbus Behçet mit aktiver, unter Immunsuppression therapierefraktärer Panuveitis und/oder retinaler Vaskulitis untersucht. Die Nachbeobachtungszeit lag zwischen 2,0 und 12,6 Jahren. Die Dauer des ersten bzw. gegebenenfalls zweiten Behandlungszyklus mit Interferon sowie die Häufigkeit und Dauer der rezidiv-freien Zeit nach Absetzen von Interferon wurden erfasst. Außerdem wurde die Sehschärfe am Ende des Beobachtungszeitraums mit der Sehschärfe bei Remission der Augenbeteiligung verglichen. 3. Ergebnisse Bei 52 Patienten (98...

Interferón gamma en el manejo de la enfermedad granulomatosa crónica en el paciente pediátrico

Medina Ramos, Diana Carolina; Bohorquez Garnica, Andrés
Fonte: Facultad de medicina Publicador: Facultad de medicina
Tipo: info:eu-repo/semantics/bachelorThesis; info:eu-repo/semantics/acceptedVersion Formato: application/pdf
SPA
Relevância na Pesquisa
36.66%
Antecedentes: La enfermedad granulomatosa crónica aumenta el riesgo de infecciones. El interferón gamma se ha venido utilizando como parte del tratamiento; sin embargo, su eficacia no ha sido explorada por una revisión sistemática. Objetivo: Determinar y analizar la eficacia del uso del interferón gamma en el manejo de pacientes en edad pediátrica con diagnóstico de enfermedad granulomatosa crónica. Metodología: Se realizó una revisión sistemática de la literatura. La búsqueda se hizo en cuatro bases de datos y un registro público de ensayos clínicos. Se realizó un enfoque cualitativo y cuantitativo. Para variables cualitativas se emplearon como indicadores el riesgo relativo y para las cuantitativas la diferencia del promedio. Resultados: Se incluyeron tres estudios, dos de ellos estudios no aleatorizados. Un solo ensayo clínico de buena calidad mostró evidencia sobre la utilidad del uso del interferón en la reducción de la infección severa. Conclusión: Es posible que el uso del interferón gamma se relacione con mejoría de varios desenlaces clínicos del paciente. Es necesario realizar más ensayos clínicos controlados de buena calidad que permitan explorar la eficacia del tratamiento en esta indicación. Palabras clave: Enfermedad granulomatosa crónica...

Clinical and serological manifestations associated with interferon-α levels in childhood-onset systemic lupus erythematosus

Postal, Mariana; Sinicato, Nailu Angélica; Peliçari, Karina Oliveira; Marini, Roberto; Lavras Costallat, Lilian Tereza; Appenzeller, Simone
Fonte: Universidade de São Paulo. Faculdade de Medicina Publicador: Universidade de São Paulo. Faculdade de Medicina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; ; Formato: application/pdf
Publicado em 01/01/2012 ENG
Relevância na Pesquisa
36.64%
OBJECTIVE: To determine the serum levels of interferon alpha in childhood-onset systemic lupus erythematosus patients, their first-degree relatives and healthy controls and to evaluate the associations between serum interferon alpha and disease activity, laboratory findings and treatment features. METHODS: We screened consecutive childhood-onset systemic lupus erythematosus patients in a longitudinal cohort at the pediatric rheumatology unit of the State University of Campinas between 2009 and 2010. All patients demonstrated disease onset before the age of 16. Disease status was assessed according to the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI) and Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index (SDI). Interferon alpha levels were measured using an enzyme-linked immunoabsorbent assay. RESULTS: We included 57 childhood-onset systemic lupus erythematosus patients (mean age 17.33±4.50), 64 firstdegree relatives (mean age 39.95±5.66), and 57 healthy (mean age 19.30±4.97) controls. Serum interferon alpha levels were significantly increased in childhood-onset systemic lupus erythematosus patients compared to their firstdegree relatives and healthy controls. Interferon alpha levels were significantly increased in patients with positive dsDNA antibodies...

Produção de interferon ou substância semelhante em culturas EB3 inoculadas com soros humanos contendo antígeno Austrália; The interferon or interferon-like substance production of EB3 cells after inoculation with human sera containing Australia antigen

Candeias, J. A. N.
Fonte: Universidade de São Paulo. Faculdade de Saúde Pública Publicador: Universidade de São Paulo. Faculdade de Saúde Pública
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Artigo Avaliado pelos Pares Formato: application/pdf
Publicado em 01/09/1975 POR
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36.61%
Culturas de células EB3, quando inoculadas com soros humanos contendo antígeno Austrália, produzem interferon ou substância semelhante em títulos significativamente mais elevados do que as culturas controle, não inoculadas. As culturas de células EB3 inoculadas com soros humanos negativos para o antígeno Austrália comportam-se de modo idêntico às culturas controle, no que respeita aos títulos de interferon, ou substância semelhante. Sugere-se a possibilidade daquele efeito poder servir de indicador de uma possível interação entre as células EB3 e o antígeno Austrália.; The production of interferon or an interferon-like substance by EB3 cell cultures exposed to human sera containing Australia antigen is described. The normal pattern of interferon production by EB3 cells not inoculated with human sera is modified, after exposure to human positive sera for Australia antigen and it is suggested that this modification may provide a criterion for interaction of Australia antigen and EB3 cells.

Virus B e interferón

Avendaño-Alvarado,Gerardo
Fonte: Acta Médica Costarricense Publicador: Acta Médica Costarricense
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/11/2008 ES
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La aparición de nuevas drogas y formas de diagnóstico, han transformado la hepatitis crónica B de una enfermedad fatal a una manejable y aún curable. Se distinguen dos tipos de enfermedad crónica por virus B, la que se desarrolla con antígeno e positivo y la que cursa con antígeno e negativo. La enfermedad crónica puede presentarse con ALT normal, ALT en continua elevación, fluctuaciones de ALT sin llegar a ser normales o elevaciones intermitentes. El éxito de la terapia antiviral para el virus B incluye, suprimir la replicación viral al nivel más bajo posible, lograr mejoría bioquímica e histológica y prevenir el desarrollo de complicaciones. Existen dos estrategias de tratamiento para el virus B, una de duración limitada (interferones) y otra de largo plazo (análogos nucleós(t)idos). Existen factores que influencian favorablemente la respuesta al tratamiento con interferón: niveles bajos de HBV DNA, niveles altos de ALT, niveles bajos de HBeAg y genotipos A y B. En el manejo de la enfermedad crónica tanto por virus B e ( + ) y e ( - ) se han utilizado interferón αlfa y actualmente el interferón pegilado α-2a. El interferón pegylado también ha mostrado ser superior al interferón simple en cuanto a normalización de ALT...

Sobrevida de los pacientes con carcinoma renal avanzado tratados con Interferón

Ares Valdés,Yolanda
Fonte: Archivos Españoles de Urología (Ed. impresa) Publicador: Archivos Españoles de Urología (Ed. impresa)
Tipo: info:eu-repo/semantics/article; journal article; info:eu-repo/semantics/publishedVersion Formato: text/html; application/pdf
Publicado em 01/02/2009 SPA
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Objetivo: Determinar la sobrevida de los pacientes con carcinoma renal metastásico tratados con Interferón. Métodos: Estudio retrospectivo longitudinal de 18 pacientes atendidos en el Hospital Universitario Manuel Fajardo entre julio del 2002 a septiembre del 2007, con diagnóstico de carcinoma renal metastásico tratados con cirugía radical e Interferón Alfa 2b recombínante adyuvante a la cirugía o como monoterapia. Resultados: El 74%, 14/18 de los pacientes fueron masculinos, el 26%, 5/18 femeninos. Al 72%, 13/18 se les realizó cirugía radical más Interferón y el 28%, 5/18 se le administró el Interferón como monterapía. Se observó respuesta completa en el 22%, 4/18 y progresión en el 78%, 14/18. La sobrevida fue del 50%, 33%, 28% y 22% a 1, 2, 4 y 5 años respectivamente. Conclusiones: No se encontró respuesta significativa. No hubo regresión de la carga tumoral en ningún caso con el uso del Interferón. La sobrevida fue mejor en los casos que se les realizó nefrectomía radical más Interferón que en los casos tratados con Interferón como monoterapia.