lipids t cells and nkt cells in microbial immunity
Báo cáo y học: "Heterogeneity of CD4+ and CD8+ memory T cells in localized and generalized Wegener’s granulomatosis." potx
... as response in vitro to chemotactic gradients, cytokine release and cytotoxic activity of distinct T cell populations Detection of the inducible inflammatory chemokine receptors CCR5 and CCR3 on ... steps mediated by selectin and adhesion molecules, chemokine receptors support the selective recruitment of differentiated T cells into tissues through interaction with endothelial and tissue-expressed ... described Thus, the local cytokine milieu might depend on the site and extent of disease activity [4,5] The shift in the cytokine profile in granulomatous lesions of the respiratory tract might be...
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Báo cáo y học: "Decreased effector memory CD45RA+CD62L– CD8+ T cells and increased central memory CD45RA–CD62L+ CD8+ T cells in peripheral blood of rheumatoid arthritis patients" ppt
... control group (P > 0.9, by Student’s t- test), between the age of the SLE patient group and the corresponding healthy control group (P > 0.9, by Student’s t- test), and between the RA patient group ... cells in RA may indicate an increase in the migration of these cells into sites of inflammation, and therefore may contribute to ongoing synovial inflammation Competing interests None declared 13 ... these phenotypes in RA may provide important insights into T- cell homeostasis, and we therefore examined the distribution of CD4+ and CD8+ T cells into these subpopulations because such a study may...
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Báo cáo y học: "Prevalence, clinical relevance and characterization of circulating cytotoxic CD4+CD28– T cells in ankylosing spondylitis" ppt
... of these CD4+ T cells in AS disease Thus, the model of CD4+CD28– NK T cells initiating and sustaining immune responses, and providing a link between the adaptive and the innate immune systems, ... cervical rotation in sitting position, chin to jugulum distance, thoracic Schober test, chest expansion and fingers to floor distance, but not tragus to wall distance, intermalleolar distance, modified ... under identical conditions, differences in the apoptotic rate cannot be attributed to tissue culture conditions In the healthy control Available online http://arthritis-research.com/content/5/5/R292...
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Báo cáo y học: "Regulating the immune system: the induction of regulatory T cells in the periphery Jane H Buckner1 and Steven F Ziegler2" pot
... when the body is threatened by infection or injury In this setting T cells will become activated, and will recruit other T cells and other inflammatory cells and mediators to the site As the response ... death, TR cells lead to the induction of T regulator (Tr1) cells and Th3 cells, which feed back to inhibit inflammation, and the TR cells inhibit proliferation of antigen-specific and bystander ... differentiating into TR cells following activation are derived from a separate lineage of CD4+ T cells, and whether their induction is a result of the initial activation early in the inflammatory...
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Báo cáo y học: "The role of regulatory T cells in antigen-induced arthritis: aggravation of arthritis after depletion and amelioration after transfer of CD4+CD25+ T cells" doc
... of Treg cells [37] With this in mind, it could be interesting to investigate whether the accumulated Treg cells in patients with arthritis function properly in vivo and whether these patients ... foreign antigen mBSA clearly demonstrates that their suppressive effect is not strictly limited to autoreactive T cells Taking into consideration that Treg cells are also critically involved in the ... of the T- cell compartment is still activated 14 days after intra-articular antigen challenge in the absence of Treg cells Compatible with these findings is that the production of cytokines in...
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Báo cáo y học: "Role of regulatory T cells in experimental arthritis and implications for clinical use" potx
... might not be a feasible option treatment decreases the infiltrate in joints Furthermore, RA patients relapse shortly after withdrawal of anti-TNF-α [19] and thus, despite the dampening of joint inflammation ... that Treg isolated from patients with active RA before treatment with anti-TNF-α were unable to suppress proinflammatory cytokine secretion from activated T cells and monocytes After anti-TNF-α treatment ... instead very active The authors provided a startling explanation for this apparent incongruence, in their discovery that tissue-infiltrating effector (pathogenic) T cells were less prone to be...
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Báo cáo y học: "Regulatory T cells in systemic lupus erythematosus: past, present and future" pot
... intact in cultures without antigen-presenting cells The functional activity of both patient and healthy control Tregs, however, was decreased in the presence of the patient’s antigen-presenting ... Overproduction of type I interferons in SLE matures dendritic cells (DCs) into immunogenic antigen-presenting cells that strongly contribute to the T- cell and B-cell hyperactivity characteristic of this ... not be able to overcome the strength of T- cell stimulation or the inhibitory effects of proinflammatory cytokines produced by other cells It is known that strong Toll-like receptor stimulation...
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Báo cáo y học: " The role of γδ T cells in airway epithelial injury and bronchial responsiveness after chlorine gas exposure in mice" pps
... attenuated inflammatory response The contribution of γδ T cells to epithelial regeneration in the intestine is not evident in the airways Competing interests The author(s) declare that they have ... representing less than 10% of the total T cells in the lung and are described as being virtually absent from the bronchial epithelium itself [18] This observation is consistent with the finding that ... γδ T cells in determining the magnitude of the inflammatory response to acute epithelial injury and in maintaining and repairing the epithelial barrier [16] Chen et al have found that a deficiency...
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Báo cáo sinh học: " Protection against the allergic airway inflammation depends on the modulation of spleen dendritic cell function and induction of regulatory T cells in mice" docx
... and mature DCs, resulting in tolerogenic interaction with T cells in SIT We found that the combination of DNA vaccination with Fc and OVA had better effects onOVAinduced alterations in the spleen ... pathway of regulation of type immunity in asthma Competing interests The authors declare that they have no competing interests Authors' contributions YL performed all analyses and wrote the initial ... maintained in the culture medium and incubated overnight at 37°C in a 5% CO2 atmosphere After incubation, DCs with the adherence capacity in the first hours of culture become nonadherent and float in the...
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The role of CD8 t cells in the differentiation of TNF iNOS producing dendritic cells and TH1 responses
... Abstract In this study, we showed that activated human CD8 T- cells could induce DCs to produce IL-12p70 in vitro and this interaction also resulted in the production of a cytokine milieu that ... unprecedented ability to activate naive T cells (Steinman and Cohn, 1974) These cells are now known as the primary instigators of the adaptive immunity as they are vital for detecting, alerting and ... up-regulated by factors that activate DCs including LPS and TNF-α Interestingly, recent studies have shown that memory CD8 T cells protected DCs from killing through cytotoxic granules by releasing TNF-α...
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Study on membranes and cathode catalysts in microbial fuel cells
... across the membranes Other than this, loss determined by kinetics also exists in bioelectrocatalyst system as substrate turnover at the catalytic active sites (ηturnover) At increasing current density ... concentration overpotential It typically exists in biological systems which mostly operated at near-neutral pH range and at often low ionic strength, attributed to the insufficient proton transfer ... applications in a time frame of at least two months (3) The catalysts must be costeffective with low toxicity to the environment and human health (4) The catalysts could be applied directly onto cathode...
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Báo cáo y học: "Nature of Regulatory T Cells in the Context of Allergic Disease." ppsx
... applicability that will have persistent clinical effectiveness that can be built within a short duration of therapy time.1 107 Early and Late Effects of SIT on Mast Cells, Basophils, and Eosinophils SIT ... mucosa represents a unique immunologic unit with the first contact with the allergen within the gastrointestinal tract, where immune tolerance is the natural outcome Freshly isolated oral LCs expressed ... Further studies are required to elucidate the in vivo role of these cells and their subsets Effects of SIT on Dendritic Cells To understand the mechanisms of action of SIT, some cardinal steps...
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Báo cáo y học: "The expansion of CD4+CD28– T cells in patients with rheumatoid arthritis" potx
... T cells contribute to the cell infiltrate and exhibit increased survival after apoptotic stimuli Resistance to apoptosis in CD28– T cells is due to elevated expression of antiapoptotic protein ... required In all patients, X-rays were made of the chest, hands, feet, and, when required, other joints The evaluation of the subjects included physical examinations with attention to pattern of joint ... 4.82% in patients with limited joint manifestations, 7.05% in those with advanced joint involvement, and 10.35% in those with extra-articular manifestations R211 Arthritis Research & Therapy Vol...
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Báo cáo y học: " Induction of IL-10-producing CD4+CD25+ T cells in animal model of collagen-induced arthritis by oral administration of type II collagen" pptx
... elevated production of TGF-β from tolerized lymphocytes as well, and it would therefore be very interesting to investigate the role of Th3 cells In order to further define the characteristics of cells ... agents, the plates were incubated with previously collected supernatants for hour at room temperature The plates were then washed and incubated for hour at room temperature with biotinconjugated rat ... function that are involved in the induction of peripheral tolerance in an orally tolerized mouse model of arthritis R218 Our findings indicate that the serum levels of proinflammatory and anti-inflammatory...
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Báo cáo y học: "Direct Toll-like receptor 2 mediated co-stimulation of T cells in the mouse system as a basis for chronic inflammatory joint disease" ppsx
... upper 5'-TCT GCT GTG CCC TTC TCC TGT TGA-3' mTLR2 lower 5'-GGC CGC GTC GTT GTT CTC GT-3' mTLR4 upper 5'-AGC CGG AAG GTT ATT GTG GTA GT-3' mTLR4 lower 5'-TGC CGT TTC TTG TTC TTC CTC T- 3' mTLR6 upper ... that bacterial lipoproteins directly stimulate alloreactive CTLs to proliferate and to secrete IFN-γ via TLR-2 adds another facet to the functional potential of T effector cells The fact that ... endothelial barriers TLR ligands can activate T cells independent of antigenic specificity release of inflammatory cytokines T/ TE T/ TE T/ TE B burgdorferi T/ TE pre-activated T cells and T effector...
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Báo cáo y học: "Use of HLA-B27 tetramers to identify low-frequency antigen-specific T cells in Chlamydia-triggered reactive arthritis" docx
... blood with both methods (tetramer staining and intracellular cytokine staining), we investigated whether enrichment of these cells could be achieved by short-term stimulation with autologous ... Chlamydia-infected DCs By doing this we intended to obtain a higher frequency of tetramer-positive CD8+ T cells, to underline the specificity of tetramer staining Available online http://arthritis-research.com/content/6/6/R521 ... staining difficult We confirmed our tetramer staining result in one patient by expansion of peptide-specific CD8+ T cells followed by tetramer staining with increased amounts of tetramer-binding...
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Báo cáo y học: "Use of soluble MHC class II/peptide multimers to detect antigen-specific T cells in human disease." pps
... α-chains and β-chains are secreted into the supernatant of baculovirusinfected moth cells in the correctly folded, biologically active state In addition, the constructs include a cassette encoding the ... Kotzin These findings question the original premise that cells staining positive with class II/peptide multimers would significantly outnumber those that proliferate in response to the particular ... narrowing of the TCR repertoire after secondary immunization, resulting from the loss of cells with lowest affinity and an increase in cells with higher affinity for peptide/MHC binding Other studies...
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Báo cáo y học: "egulatory T cells in rheumatoid arthritis" ppsx
... anti-TNF-treated patients with RA that were depleted of Tregs [38] Together, these data might underline the potential role of cytokines in maintaining chronic inflammation in vivo An alternative ... CD4+CD25high T cells from patients with active RA with regard to their ability to suppress pro-inflammatory cytokine production that reverts after treatment with TNF-neutralizing agents Additional ... leading to the accumulation of CD4+CD25+ T cells in the rheumatic joint might relate to the fact that inflammatory cytokines such as IL-2 and costimulatory molecules cause CD4+CD25+ T cells to...
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Báo cáo y học: "CD134 as target for specific drug delivery to T cells in adjuvant arthritis" pps
... about this time T cells start to infiltrate the joints [17] The present data therefore suggest that early in AA, CD134+ T cells, after activation in the PLN, can migrate to Available online http://arthritis-research.com/content/7/3/R604 ... experiments and participated in the interpretation of the results WVE participated in the design of the study and in its coordination LE participated in the experiments, statistical analysis and interpretation ... (data not shown) tion by activated CD4 T cells in vitro Anti-CD134-mediated+targeting does not lead to liposome internalization by activated CD4+ T cells in vitro A2b T cells were cultured with...
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Báo cáo y học: "Skewed distribution of proinflammatory CD4+CD28null T cells in rheumatoid arthritis" docx
... 4a–c These results suggest that the access of CD4+CD28null T cells to the joint is restricted to certain TCR-Vβ subsets, and that RA patients can be divided into two distinct groups with regard to ... fluid Interestingly, the TCR-Vβ dominant CD4+CD28null T- cell subsets did not respond either to pp65 or to immediate early antigens, indicating that the TCR-Vβ dominant subsets might be reactive to ... distribution in the inflamed joint compared with that in peripheral blood Consistent with the limited number of CD4+CD28null T cells in the joints, these cells were not associated with joint destruction...
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