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排序方式: 共有9283条查询结果,搜索用时 15 毫秒
991.
Dessy Rachmawati B. Mary E. von Blomberg Cornelis J. Kleverlaan Rik J. Scheper Ingrid M.W. van Hoogstraten 《The Journal of prosthetic dentistry》2017,117(5):677-684
Statement of problem
Oral metal exposure has been associated with systemic and local adverse reactions, probably due to elemental release from the alloys. Although supraphysiological concentrations of salts from dentally applied metals can activate innate cells through TLR4 (Ni, Co, Pd) and TLR3 (Au), whether direct exposure to solid alloys can also trigger innate immune reactivity is still unknown.Purpose
The purpose of this in vitro study was to determine whether dental cast alloy specimens can activate innate cells and influence their responsiveness to bacterial endotoxin.Material and methods
Human monocyte-derived dendritic cells (MoDC) and THP-1 cells were cultured on top of different alloy specimens (Ni-Cr, Co-Cr, Pd-Cu, Pd-Ag, Ti-6Al-4V, amalgam, gold, and stainless steel) or in alloy-exposed culture medium with or without endotoxin (lipopolysaccharide [LPS]; Escherichia coli 055:B5). Interleukin-8 (IL-8) production was used as the parameter for innate stimulation and evaluated by enzyme-linked immunosorbent assay after 24 hours of culture. The statistical significance of the effects of various casting alloys on the secretion of IL-8 was analyzed by using the nonparametric Wilcoxon rank sum test (α=.05).Results
Dental cast alloys induced IL-8 production in MoDC and THP-1 cells, with Au and Pd-Cu providing the strongest stimulation. The alloy-exposed culture media tested contained sufficient stimulatory metal ions to induce detectable IL-8 production in THP-1 cells, except for the Ni-Cr and stainless steel exposed media. Au and Pd-Cu alloys were also most effective in potentiating LPS responsiveness as measured by IL-8 production.Conclusions
Using an in vitro culture system to expose MoDC and THP-1 cells to different alloy specimens this study showed that contact with the solid alloys, in particular when they contain Pd or Au, can trigger innate immune responses and augment responsiveness to bacterial endotoxin. 相似文献992.
Objectives
To review the past 10 years of research in the diagnostic accuracy of magnetic resonance imaging (MRI) and clinical signs of temporomandibular joint (TMJ) disorders with pain, sound, and function limitation in the existing literature.Methods
A review of the literature was performed to search for all articles published between 2006 and 2016, and those that met the selection criteria were examined.Results
The MRI results ranged from 25.3 to 69% for findings in TMJ with sound, 17–74.5% for findings in TMJ with function limitation, and 13.3–77% for findings in TMJ with pain. The reasons for the TMJ symptoms were variable and MRI findings for temporomandibular disorders were seen in asymptomatic patients as well as symptomatic patients. No singular outcome measure can be suggested as a predictor for TMJ symptoms on MRI images.Conclusions
To increase study comparability with MRI, a standardized terminology and evidence-based guidelines are required for correlations of clinical symptoms and MRI findings.993.
Economic evaluation of occupational therapy in Parkinson's disease: A randomized controlled trial
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995.
IL‐7 and immobilized Kit‐ligand stimulate serum‐ and stromal cell‐free cultures of precursor B‐cell lines and clones
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Yohei Kawano Georg Petkau Ingrid Wolf Julia Tornack Fritz Melchers 《European journal of immunology》2017,47(1):206-212
Long‐term proliferating, DHJH‐rearranged mouse precursor B‐cell lines have previously been established in serum‐ and IL‐7‐containing media from fetal liver, but not from bone marrow. Serum and stromal cells expose these pre‐B cells to undefined factors, hampering accurate analyses of ligand‐dependent signaling, which controls pre‐B cell proliferation, survival, residence and migration. Here, we describe a novel serum‐free, stromal cell‐free culture system, which allows us to establish and maintain pre‐B cells not only from fetal liver, but also from bone marrow with practically identical efficiencies in proliferation, cloning and differentiation. Surprisingly, recombinant kit‐ligand, also called stem cell factor, produced as a kit‐ligand‐Fc fusion protein, suffices to replace stromal cells and serum, provided that it is presented to cultured pre‐B cells in an optimal density in plate‐bound, insolubilized, potentially crosslinking form. Additional recombinant CXCL12 and fibronectin have a minor influence on the establishment and maintenance of pre‐B cell lines and clones from fetal liver, but are necessary to establish such cell lines from bone marrow. 相似文献
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Jérémy B. Coquart Frédéric Lemaître Ingrid Castres Sylvain Saison Frédéric Bart Jean-Marie Grosbois 《COPD》2015,12(5):533-538
The aims of this study were to test the reproducibility of the 6-minute stepper test (6MST), and evaluate its accuracy in detecting improved functional capacity after pulmonary rehabilitation (PR) in patients with chronic obstructive pulmonary disease (COPD). Thirty-five COPD outpatients performed two 6MSTs in the same session, before (6MST1 and 6MST2) and after (6MST3 and 6MST4) PR. The performance, perceived exertion, heart rate and arterial oxygen saturation were measured during each 6MST. The performance was higher during the second 6MST of the same session (before PR: 514 strokes during the 6MST2 > 471 strokes during the 6MST1, and after PR: 559 strokes during the 6MST4 > 508 strokes during the 6MST3; p = 0.04). After PR, 6MST performance was higher than before PR (6MST3 > 6MST1 and 6MST4 > 6MST2; P < 0.01). The bias (the difference in the number of strokes) between the two 6MSTs from the same session (before PR: 6MST2-6MST1 = 42 strokes vs after PR: 6MST4-6MST3 = 52 strokes) was not different (P = 0.34). However, both bias were greater than 0 (P < 0.001). The mean performances for the two 6MSTs of the same session (before PR: 6MST1 and 6MST2 and after PR: 6MST3 and 6MST4) were correlated with the bias between these performances (P < 0.01; r = 0.32). The perceived exertions were lower after PR (P < 0.02). The systematic improvement of performance (8–10%) during the second 6MST of the each session may be explained from the warming of hydraulic jacks of the stepper and/or learning effect. On the other hand, the 6MST seems sufficiently sensitive to detect functional capacity improvements after PR in patients with COPD. 相似文献
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