Does Time to Theatre Affect the Ability to Achieve Fracture Reduction in Tibial Plateau Fractures?

Surgical management of displaced tibial plateau fracture (TPF) is often delayed due to accompanying soft tissue injuries sustained at the time of injury. The primary aim of this study was to assess the effect of time to surgery on fracture reduction in cases of TPF. The secondary aim was to assess the effect of preoperative demographics and residual articular step on Lysholm Scores and Knee Injury and Osteoarthritis Outcome Scores (KOOS) following fixation.

Routine clozapine assay monitoring to improve the management of treatment-resistant schizophrenia.

Aims And Method: Routine therapeutic drug monitoring in clozapine therapy has previously not been considered justifiable. Using observational data, the clinical utility of annual clozapine assay monitoring is explored within a large mental health trust.

Results: After the introduction of routine monitoring, the rate of clozapine assays rose to 2.

Fusion Assessment by MRI in Comparison With CT in Anterior Lumbar Interbody Fusion: A Prospective Study.

Study Design: Prospective cohort study.

Objectives: To evaluate the role of magnetic resonance imaging (MRI) in evaluation of fusion status following anterior lumbar interbody fusion (ALIF) and compare agreement and confidence in assessing fusion or its absence on MRI to the current standard computed tomography (CT).

Methods: A prospective follow up of patients undergoing surgery by 2 spine surgeons between 2012 and 2015 at a single institution.

Time dependent loss of trabecular bone in human tibial plateau fractures.

We investigated if time between injury and surgery affects cancellous bone properties in patients suffering tibial plateau fractures (TPF), in terms of structural integrity and gene expression controlling bone loss. A cohort of 29 TPF, operated 1-17 days post-injury, had biopsies from the fracture and an equivalent contralateral limb site, at surgery. Samples were assessed using micro-computed tomography and real-time RT-PCR analysis for the expression of genes known to be involved in bone remodeling and fracture healing.

An uncharged amine in the transition state of the ribosomal peptidyl transfer reaction.

The ribosome has an active site comprised of RNA that catalyzes peptide bond formation. To understand how RNA promotes this reaction requires a detailed understanding of the chemical transition state. Here, we report the Brønsted coefficient of the alpha-amino nucleophile with a series of puromycin derivatives.

Preparation of 5'-silyl-2'-orthoester ribonucleosides for use in oligoribonucleotide synthesis.

The recent discovery that small interfering RNAs (siRNAs) induce gene suppression in mammalian cells has sparked tremendous interest in using siRNA-based assays and high-throughput screens to study gene function. As a result, research programs at leading academic and commercial institutions have become a substantial and rapidly growing market for synthetic RNA. Important considerations in synthesizing RNA for biological gene function studies are sequence integrity, purity, scalability, and resistance to nucleases; ease of chemical modification, deprotection, and handling; and cost.

Chromophoric 5'-O-Silyl protection of N-protected 2'-ACE ribonucleosides for solid-phase RNA synthesis.

Recent advances in the understanding of the pivotal roles played by endogenous small RNAs in gene regulation have resulted in a substantial and rapidly growing market for synthetic RNA. 5'-Silyl-2'-ACE chemistry has proven to be a robust and reliable technology for the synthesis of oligoribonucleotides. This unit describes an important improvement to this chemistry, by adding a cycle-to-cycle traceability analogous to that inherent in 5'-dimethoxytrityl-based approaches.

Structural insights into the roles of water and the 2' hydroxyl of the P site tRNA in the peptidyl transferase reaction.

Peptide bond formation is catalyzed at the peptidyl transferase center (PTC) of the large ribosomal subunit. Crystal structures of the large ribosomal subunit of Haloarcula marismortui (Hma) complexed with several analogs that represent either the substrates or the transition state intermediate of the peptidyl transferase reaction show that this reaction proceeds through a tetrahedral intermediate with S chirality. The oxyanion of the tetrahedral intermediate interacts with a water molecule that is positioned by nucleotides A2637 (E.

Solid phase synthesis and binding affinity of peptidyl transferase transition state mimics containing 2'-OH at P-site position A76.

All living cells are dependent on ribosomes to catalyze the peptidyl transfer reaction, by which amino acids are assembled into proteins. The previously studied peptidyl transferase transition state analog CC-dA-phosphate-puromycin (CCdApPmn) has important differences from the transition state, yet current models of the ribosomal active site have been heavily influenced by the properties of this molecule. One significant difference is the substitution of deoxyadenosine for riboadenosine at A76, which mimics the 3' end of a P-site tRNA.