Results: Mean peak stresses during compression were about five (25%), 11 (50%), and 30 MPa (75%), respectively. GAG and LDH release and numbers of CN increased whereas NO production and mRNA levels of matrix metalloproteinase (MMP)-2, -3 and a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS)-4 decreased SBE-β-CD chemical structure strain-dependently after compression. IL-1 induced an increase in GAG and NO release as well as MMP-2, -3 and ADAMTS-4 levels, but had no impact on the LDH release and slightly increased numbers of CN. However, in combination with compression the tissue responses were reduced and LDH and CN levels were increased compared to IL-1 alone.
Conclusion: Our
data suggest that a single impact compression induces cell damage and release of GAG and reduces the NO production and transcription of certain matrix-degrading enzymes. It also reduces
the capacity of meniscal tissue to respond to IL-1, which might be related to the cell damage and suggests that the compression-related GAG release might rather be the result of immediate extracellular matrix-damage than a cell-mediated event. This, however, needs to be confirmed in future studies. (C) 2012 Osteoarthritis Research Society International. Published by Elsevier Ltd. All rights reserved.”
“SETTING: Direct sputum smear microscopy is usually less sensitive than the indirect approach using concentration by centrifugation, but laboratories often do not have access to appropriate equipment. learn more An alternative method of sample concentration has been developed based on magnetic beads coated with a polymeric ligand that binds mycobacteria species. The ‘TB-Beads’ technology allows manual sample preparation using simple magnetic separation equipment prior to microscopy.
OBJECTIVE: 1)
To evaluate TB-Beads, in combination with fluorescent auramine staining, on a blind panel of 129 frozen samples from the Special Programme for Research & Training in Tropical Diseases (TDR), the World Health Organization sputum bank; and 2) to compare the microscopy results to indirect microscopy, culture and the clinical data already available on these samples.
RESULTS: The correlation between the TB-Beads protocol DZNeP solubility dmso and indirect microscopy was 96.1% (124/129). The TB-Beads protocol was 89.4% (76/85) sensitive compared to culture and 77.8% (77/99) sensitive compared to clinical diagnosis.
CONCLUSION: Capture by magnetic particles yields a concentrated sample that is immobilised over a defined area of the slide, thereby aiding microscopic analysis. TB-Beads allow laboratories that currently perform comparatively insensitive direct microscopy to implement a concentration method that has the potential to improve TB detection rates.”
“Objective: Cartilage restoration in joints with an early stage of osteoarthritis (OA) is an important clinical challenge.