Immunoregulatory Factors
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Study of regulatory and proinflammatory factors in chronic idiopathic urticaria and in vitro immunomodulatory effect of statins / Estudo dos fatores regulatórios e pró-inflamatórios na urticária crônica idiopática e efeito imunomodulatório in vitro das estatinas
INTRODUCTION: Chronic Idiopathic Urticaria (CIU) is a disease triggered by degranulation of basophils and mast cells with consequent histamine release and the CIU immunological profile is not well established. Statins, 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors, also display a broad immunomodulatory property. Statins have been studied in seve
Publicado em: 2010
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2. T-cell responses associated with resistance to Leishmania infection in individuals from endemic areas for Leishmania (Viannia) braziliensis
Subclinical or asymptomatic infection is documented in individuals living in endemic areas for leishmaniasis suggesting that the development of an appropriate immune response can control parasite replication and maintain tissue integrity. A low morbidity indicates that intrinsic factors could favor resistance to Leishmania infection. Herein, leishmanial T-ce
Memórias do Instituto Oswaldo Cruz. Publicado em: 12/07/2007
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3. Isolation and partial characterization of an antigen-specific T-cell factor associated with the suppression of delayed type hypersensitivity.
Antigen-specific factors associated with immunosuppressive activity, released by cultured T cells from mice tolerant to the haptens trinitrophenyl, dinitrophenyl and oxazolone, were purified by hapten affinity chromatography. Their binding specificity for antigens paralleled their immunoregulatory activity. Like some immunoglobulin molecules, these factors h
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4. v-rel induces expression of three avian immunoregulatory surface receptors more efficiently than c-rel.
The c-rel gene is a member of NF-kappa B/rel family of transcription factors that regulate expression of a variety of immunoregulatory molecules. The viral oncogene, v-rel, is a truncated and mutated form of the turkey c-rel gene expressed by reticuloendotheliosis virus, strain T. In this study, we demonstrated that three avian immunoregulatory receptors, ma
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5. Cytotoxic and immunoregulatory function of intestinal lymphocytes in Chlamydia trachomatis proctitis of nonhuman primates.
To study the role of natural killer cells and immunoregulatory T cells in the pathogenesis of proctitis due to Chlamydia trachomatis (L2 serovar), lymphocytes were obtained from the rectal mucosa and other sites of nonhuman primates and studied by using phenotypic and functional assays. In animals with lymphogranuloma venereum (LGV) proctitis, the percentage
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6. Essential Role of Interferon Regulatory Factor 3 in Direct Activation of RANTES Chemokine Transcription
Localized and systemic cytokine production in virus-infected cells play an important role in the outcome of viral infection and pathogenicity. Activation of the interferon regulatory factors (IRF) in turn is a critical mediator of cytokine gene transcription. Recent studies have focused on the 55-kDa IRF-3 gene product as a direct transcriptional regulator o
American Society for Microbiology.
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7. Alveolar epithelial type II cell: defender of the alveolus revisited
In 1977, Mason and Williams developed the concept of the alveolar epithelial type II (AE2) cell as a defender of the alveolus. It is well known that AE2 cells synthesise, secrete, and recycle all components of the surfactant that regulates alveolar surface tension in mammalian lungs. AE2 cells influence extracellular surfactant transformation by regulating,
BioMed Central.
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8. Trypanosoma cruzi-induced host immune system dysfunction: a rationale for parasite immunosuppressive factor(s) encoding gene targeting
An intense suppression of T cell proliferation to mitogens and to antigens is observed in a large number of parasitic infections. The impairment of T cell proliferation also occurred during the acute phase of Chagas' disease, caused by the intracellular protozoan parasite Trypanosoma cruzi. A wealth of evidence has accumulated that illustrates the ability of
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9. Development of a human T-cell hybridoma secreting separate B-cell growth and differentiation factors.
A cloned human T-cell hybridoma (7D5) secreting B-cell growth factor (BCGF) and B-cell differentiation factor (BCDF) was established. Supernatant from this hybrid was capable of maintaining proliferation in anti-IgM-activated normal human B cells. In addition, the hybridoma supernatant induced differentiation and antibody secretion in Staphylococcus aureus C
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10. Transforming growth factor type beta induces monocyte chemotaxis and growth factor production.
Recent studies have focused on the potential role of transforming growth factor type beta (TGF-beta) as an immunoregulatory peptide. In this context, we demonstrate that TGF-beta is a potent chemoattractant for human peripheral blood monocytes. At concentrations from 0.1 to 10 pg/ml, TGF-beta induces directed monocyte migration in vitro. Consistent with this
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11. Receptor to nucleus signaling by prolactin and interleukin 2 via activation of latent DNA-binding factors.
The mechanism of action of prolactin (PRL), a lactogenic and immunoregulatory hormone, has remained undetermined despite its critical role in development. This study identifies a DNA-binding factor induced by PRL that appears to mediate a signal from the cell surface receptor to specific gene expression in the nucleus. PRL stimulates the proliferation of Nb2
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12. Acute anterior uveitis and hepatitis B virus infection.
The aetiology of acute anterior uveitis (AAU) in the great majority of cases is unclear. Various infective agents have been postulated, however, as playing a direct or indirect part in the disease process, possibly via an immune-complex vasculitis. In an earlier study we concluded that, contrary to a previous report, hepatitis B virus (HBV) played only a sma