8%-39.8%; P = .006). SVG patients had a lower risk of occlusion/death (95% confidence
interval, 14.2%-94.5%; P > .05). Sixteen amputations were performed, with no significant difference based on conduit.
Conclusions: This experience indicates a trend for single-segment quality saphenous vein to remain the conduit of choice for tibial artery bypass compared with HePTFE. Factors relevant to decreased 1-year patency for the entire cohort were end-stage renal disease and nonhealing VE-821 supplier ulceration as the indication for revascularization. Although relatively short-term, these results do support HePTFE as a viable alternative conduit for patients with absent or poor quality saphenous vein who need a tibial bypass. (J Vasc Surg 2012;56:1008-14.)”
“Introduction: Hypoxia can stimulate F-18-fluorodeoxyglucose (FDG) uptake in cultured cells. A better understanding of the underlying molecular mechanism is required to determine the value of FDG for studying tumour hypoxia.
Methods: LB-100 in vivo The effect of
hypoxia on FDG uptake, and key proteins involved in glucose transport and glycolysis, was studied in MCF7 and MDA231 breast cancer cell lines.
Results: Hypoxia induced a dose- and time-dependent increase in FDG uptake. The FOG increase was transient, suggesting that FDG uptake is only likely to be increased by acute hypoxia (<24 h). Molecular analysis indicated that hypoxia upregulated glut1 and 6-phosphofructo-2-kinase, key proteins Erythromycin involved in regulating glucose transport and glycolysis,
and that these changes were induced by Hypoxia-Inducible factor 1 (HIF1) upregulation and/or AMP-activated protein kinase activation.
Conclusions: FDG may provide useful information about the oxygenation status of cells in hypoxic regions where HIF1 upregulation is hypoxia-driven. (C) 2013 Elsevier Inc. All rights reserved.”
“In terms of resolution, mass accuracy, and sensitivity, the Orbitrap represents one of the most potent mass analyzers available today. We here elucidate the potential of interfacing Orbitrap-MS to ion-pair RP HPLC for intact protein analysis. Using gradients of ACN and monolithic columns of 1.0 and 0.10 mm id, peak capacities between 120 and 130 were achievable within 20-25 min separation time. Compared with silica-based stationary phases, protein recovery and carryover from monolithic columns were found clearly superior. Intact proteins were detectable in a mass range covering 5.7-150 kDa with LODs in the low femtomol range. Compared with UV detection, MS detection with a scanning speed of 1.6 s per spectrum on average led to a 26% increase in chromatographic peak widths, whereas chromatographic patterns were mostly preserved in extracted ion chromatograms at an acquisition rate of 0.5 s per spectrum. Isotopic resolution of multiply charged ions was demonstrated for proteins up to 42 kDa. A micro-HPLC-Orbitrap-MS setup employing a 1.