(C) 2010 Elsevier Inc.”
“Purpose To find models that will explain the variability in postoperative visual acuity (VA) (logarithmic: logMAR) associated find more with unilateral primary rhegmatogenous retinal detachment (RD).\n\nMethods This was a prospective clinical cohort study of 33 patients with proliferative vitreoretinopathy (PVR: PVR<C3) and 33 without PVR, all of whom were candidates for scleral buckling (SB) surgery. Central retinal artery (CRA) Doppler sonography parameters (peak systolic, end diastolic velocities and resistibility index) and intraocular pressure (IOP) were measured before SB. Immunoreactive endothelin-1 (IR-ET-1) levels in both plasma and

subretinal fluid (SRF) were measured using a radioimmunoassay. Visual outcomes were analysed by stepwise multivariate linear regression.

The preoperative parameters used in the analysis included RD duration, IOP, logMAR VA, CRA parameters, preoperative plasma levels and intraoperative levels of IR-ET-1 in the SRF.\n\nResults The models for 8-month-postoperative logMAR VA demonstrated a predictive power higher than 85%. The values of the 8-month-postoperative logMAR VA were as follows: (a) in No PVR = -0.151+0.06 preoperative duration (days), with a predictive power of 85.3%; (b) in PVR = -1.071+0.06 SRF IR-ET-1 (pg/ml) + 0.459 preoperative logMAR VA explaining 89.9% of the variability in the postoperative logMAR VA.\n\nConclusions The duration of RD and the levels of IR-ET-1 in the SRF appear to be the best explanatory variables in the models for 8-month-postoperative logMAR GNS-1480 INCB024360 ic50 VA variability in RD patients. RD surgery should be performed as soon as possible to best preserve VA. Eye (2012) 26, 1329-1336; doi:10.1038/eye.2012.153; published online 10 August 2012″
“To understand how cell physiological state affects mRNA translation, we used Shewanella oneidensis MR-1 grown under steady state conditions at either 20% or 8.5% O-2. Using a combination of quantitative proteomics and RNA-Seq, we generated high-confidence data on > 1000 mRNA and protein pairs.

By using a steady state model, we found that differences in protein-mRNA ratios were primarily due to differences in the translational efficiency of specific genes. When oxygen levels were lowered, 28% of the proteins showed at least a 2-fold change in expression. Transcription levels were sp. significantly altered for 26% of the protein changes; translational efficiency was significantly altered for 46% and a combination of both was responsible for the remaining 28%. Changes in translational efficiency were significantly correlated with the codon usage pattern of the genes and measurable tRNA pools changed in response to altered O-2 levels. Our results suggest that changes in the translational efficiency of proteins, in part due to altered tRNA pools, is a major determinant of regulated alterations in protein expression levels in bacteria.