Search results for "Type I"
showing 10 items of 966 documents
Inhibition of the NF-κB Signaling Pathway Mediates the Anti-inflammatory Effects of Petrosaspongiolide M
2003
Petrosaspongiolide M (PT) is a potent secretory phospholipase A(2) inhibitor and anti-inflammatory agent. This marine metabolite reduced the production of nitrite, prostaglandin E(2), and tumor necrosis factor-alpha in the mouse air pouch injected with zymosan. These effects were also observed in mouse peritoneal macrophages stimulated with zymosan. Inhibition of these inflammatory mediators was related to reductions in inducible nitric oxide synthase, cyclo-oxygenase-2, and tumor necrosis factor-alpha expression. Since nuclear factor-kappaB (NF-kappaB) appears to play a central role in the transcriptional regulation of these proteins by macrophages, we investigated the effects of PT on thi…
Lovastatin stimulates p75 TNF receptor (TNFR2) expression in primary human endothelial cells
2005
HMG-CoA reductase inhibitors (statins) exert pleiotropic physiological effects. Among others they attenuate cellular responses to genotoxic and inflammatory stress. We investigated the effect of lovastatin on the expression level of TNF receptors (TNFR) in primary human endothelial cells (HUVEC). ELISA, FACS and immunocytochemical analyses show that lovastatin selectively increases the cell surface expression of TNFR2 without affecting the expression level of TNFR1. This effect of lovastatin is independent from inhibition of cell-cycle progression since cells both in G1- and G2-phase showed elevated levels of TNFR2 after lovastatin treatment. To analyze the physiological relevance of lovast…
Cytokine components and mucosal immunity in the oviduct of Xenopus laevis (amphibia, pipidae)
2011
Abstract Most studies on the mucosal immunity in female reproductive tissues have been performed in mammals. In all species, apart from their reproductive strategies, immunity in the genital mucosa is required to defend the host against luminal pathogens. In this study we investigated the role of the innate immunity of the oviductal mucosa of Xenopus laevis , an amphibian characterized by external fertilization. In particular we examined the expression and localization of Interleukin-1β (IL1B), Macrophage migration inhibitory factor (MIF) and Interleukin-1 receptor type 1 (IL1R1) in different oviductal portions including an upper glandular region, an intermediate and a lower aglandular regi…
Interferon-beta: a therapeutic for autoimmune lupus in MRL-Faslpr mice.
2005
Type I interferons are associated with lupus. Genes that are regulated by IFN-alpha are upregulated in pediatric lupus patients. Gene deletion of the IFN-alpha/beta receptor in experimental lupus-like NZB mice results in reduced disease activity. Conversely, IFN-beta is a well-established treatment in multiple sclerosis, another autoimmune disease. For determining whether IFN-beta treatment is harmful or beneficial in lupus, MRL-Fas(lpr) mice were injected with this type I IFN. Treatment was initiated in MRL-Fas(lpr) mice with mild and advanced disease. IFN-beta was highly effective in prolonging survival and ameliorating the clinical (renal function, proteinuria, splenomegaly, and skin les…
Dendritic Cell-Specific Deletion of β-Catenin Results in Fewer Regulatory T-Cells without Exacerbating Autoimmune Collagen-Induced Arthritis.
2015
Dendritic cells (DCs) are professional antigen presenting cells that have the dual ability to stimulate immunity and maintain tolerance. However, the signalling pathways mediating tolerogenic DC function in vivo remain largely unknown. The beta-catenin pathway has been suggested to promote a regulatory DC phenotype. The aim of this study was to unravel the role of beta-catenin signalling to control DC function in the autoimmune collagen-induced arthritis model (CIA). Deletion of beta-catenin specifically in DCs was achieved by crossing conditional knockout mice with a CD11c-Cre transgenic mouse line. Bone marrow-derived DCs (BMDCs) were generated and used to study the maturation profile of …
Characterization of the Adjuvant Effect of IL-12 and Efficacy of IL-12 Inhibitors in Type II Collagen-Induced Arthritis
1996
A destructive joint disease can be induced in susceptible DBA/1 mice by immunization with type II collagen emulsified with oil and either killed Mycobacterium tuberculosis or IL-12 as adjuvant. Cellular and humoral anti-collagen immune mechanisms appear to be involved in the pathogenesis of arthritis. We have characterized the adjuvant effect or IL-12 in more detail and addressed the question whether mycobacteria might act via the induction of endogenous IL-12. Injections of IL-12 into collagen-immunized DBA/1 mice promoted the development of IFN-gamma-producing CD4+ T cells and strongly upregulated the production of complement-fixing IgG2a and IgG2b antibodies resulting in severe arthritis…
Pirmā tipa cukura diabēta pacientu klīniskais novērojums endokrinologa praksē: metabolās kompensācijas novērtējums, akūto komplikāciju blakusslimību …
2017
Pētījuma darba galvenais mērķis ir analizēt dažāda smaguma hipoglikēmiju biežumu pirmā tipa cukura diabēta pacientiem un salīdzināt to ar diabēta metabolo kompensāciju. Materiāli un metodes: pētījumā tika analizētas „Latvijas Universitātes Medicīniskās pēcdiploma izglītības institūta” Dr.med. Kristīnes Ducenas pacientu ambulatorās kartes. Tika analizēti pacientu dati ar apstiprinātu diagnozi – pirmā tipa cukura diabēts. Atsevišķi tika apstrādāti dati par pacienta dzimumu, vecumu, cukura diabēta ilgumu (gados), HbA1C līmeni un citām autoimūnām blakussaslimšanām. Atkarībā no HbA1c līmeņa, pētījuma dalībnieki tika sadalīti sekojošās grupās: ●Pirmā grpa- laba diabēta kompensācija (HbA1c 7,5%). …
Myostatin/activin blocking combined with exercise reconditions skeletal muscle expression profile of mdx mice
2015
Duchenne Muscular Dystrophy is characterized by muscle wasting and decreased aerobic metabolism. Exercise and blocking of myostatin/activin signaling may independently or combined counteract muscle wasting and dystrophies. The effects of myostatin/activin blocking using soluble activin receptor-Fc (sActRIIB-Fc) administration and wheel running were tested alone or in combination for seven weeks in dystrophic mdx mice. Expression microarray analysis revealed decreased aerobic metabolism in the gastrocnemius muscle of mdx mice compared to healthy mice. This was not due to reduced home-cage physical activity, and was further downregulated upon sActRIIB-Fc treatment in enlarged muscles. However…
Osteogenic differentiation of periodontal fibroblasts is dependent on the strength of mechanical strain
2012
Abstract Objective During orthodontic therapy the correct strength of mechanical strain plays a key role for bone remodelling during tooth movement. Aim of this study was to investigate the osteogenic differentiation of human periodontal ligament fibroblasts (HPdLF) depending on the applied strength of mechanical strain compared to osteoblasts (HOB). Design HPdLF and HOB were loaded with different strengths (1%, 5% and 10%) of static mechanical strain (SMS) for 12 h in vitro. Viability was verified by MTT and apoptosis by TUNEL assay. Gene expression of cyclin D1, collagen type-1 (COL-I), alkaline phosphatase (ALP), osteocalcin, osteoprotegerin (OPG) and receptor activator of the NF-κB liga…
Deficiency of Nrf2 accelerates the effector phase of arthritis and aggravates joint disease
2011
14 páginas, 8 figuras, 1 tabla.-- et al.