tailieunhanh - Báo cáo y học: "A targeted lipidomics approach to the study of eicosanoid release in synovial joints"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài:A targeted lipidomics approach to the study of eicosanoid release in synovial joints. | de Grauw et al. Arthritis Research Therapy 2011 13 R123 http content 13 4 R123 RESEARCH ARTICLE Open Access A targeted lipidomics approach to the study of eicosanoid release in synovial joints Janny C de Grauw1 Chris HA van de Lest2 and Paul René van Weeren1 Abstract Introduction Articular tissues are capable of producing a range of eicosanoid mediators each of which has individual biological effects and may be affected by anti-inflammatory treatment. We set out to develop and evaluate a high performance liquid chromatography-tandem mass spectrometry HPLC-MS MS approach for the simultaneous analysis of multiple eicosanoid lipid mediators in equine synovial fluid SF and to illustrate its use for investigation of the in vivo effects of non-steroidal anti-inflammatory drug NSAID treatment. Methods Synovial fluid samples were obtained from normal joints of 6 adult horses at baseline 0 hr and at 8 24 and 168 hours after experimental induction of transient acute synovitis with horses treated once daily with oral NSAID meloxicam mg kg or placebo. Following solid-phase extraction SF lipid mediator quantitation was based on liquid chromatography-electrospray ionization-tandem mass spectrometry LC-ESI-MS MS analysis and results were compared between disease states using linear discriminant analysis LDA and analysis of variance ANOVA with multiple comparisons corrections. Results Of a total of 23 mediators targeted 14 could be reliably identified and quantified in SF samples based on detection of characteristic fragment ions at retention times similar to those of commercial standards. LDA analysis of baseline 8 24 and 168 hour synovial fluid samples revealed a separation of these groups into discrete clusters reflecting dynamic changes in eicosanoid release over the course of synovitis. Prostaglandin PG E2 was significantly lower in NSAID vs. placebo treated samples at all time points PGE1 11-hydroxyeicosatetraenoic acid 11-HETE and 13 .

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