RESUMO
BACKGROUND: SCUBE1 has recently been studied as a diagnostic biomarker for acute coronary syndrome, ischemic stroke, and acute mesenteric ischemia. The aim of this study is to evaluate the value of SCUBE1 and routine parameters used in patients diagnosed with acute appendicitis. METHODS: Of the 150 patients admitted to the emergency department whose initial diagnosis were acute appendicitis (AA), 103 patients were excluded from the study for various reasons. Forty-seven patients with a definitive diagnose of AA and 43 volunteers were enrolled in the study. SCUBE1, Alvarado scoring (ASK), C-reactive protein (CRP), and routine tests were compared between the two groups. RESULTS: SCUBE1 was not statistically significant between the patient and the control groups (p = 0.209). SCUBE1 was significantly higher in the CRP (+) group (p = 0.048). Both the diameter of the appendix on computerized tomography (CT) and SCUBE1 levels increased proportionally (p = 0.043). CRP was significantly higher in the perforated appendicitis (PA) compared to non-perforated appendicitis (NPA) (p = 0.007). White blood cell (WBC) count was not differential for perforation (p = 0.06). CONCLUSIONS: Although SCUBE1 was significantly higher in CRP (+) patients, it was not a diagnostic biomarker for AA. There was a positive correlation between SCUBE1 values and the diameter of appendix measured on CT.
Assuntos
Apendicite , Doença Aguda , Biomarcadores , Proteína C-Reativa , Proteínas de Ligação ao Cálcio , Humanos , Contagem de Leucócitos , Proteínas de MembranaAssuntos
Adenocarcinoma Mucinoso/diagnóstico , Neoplasias Colorretais/diagnóstico , Adenocarcinoma Mucinoso/diagnóstico por imagem , Adenocarcinoma Mucinoso/patologia , Adulto , Neoplasias Colorretais/diagnóstico por imagem , Neoplasias Colorretais/patologia , Diagnóstico Diferencial , Humanos , Imageamento por Ressonância Magnética , Masculino , Recidiva Local de Neoplasia , Tomografia Computadorizada de Emissão , Tomografia Computadorizada por Raios XRESUMO
Amphiphilic graft copolymers having polysulfone (PSf) backbones and poly(ethylene glycol) (PEG) side chains were synthesized via reaction of an alkoxide formed from PEG and a base (sodium hydride) with chloromethylated polysulfone. The resulting polysulfone-graft-poly(ethylene glycol), PSf-g-PEG, materials were hydrophilic but water insoluble, rendering them potentially useful as biomaterial coatings. PSf-g-PEG films exhibited high resistance to protein adsorption and cell attachment. When used as an additive in PSf membranes prepared by immersion precipitation, the graft copolymer preferentially segregates to the membrane surface, delivering enhanced wettability, porosity and protein resistance compared to unmodified PSf membranes. The surface properties of PSf-g-PEG modified membranes render them desirable candidates for hemodialysis.
Assuntos
Polietilenoglicóis/química , Polímeros/química , Sulfonas/química , Animais , Linhagem Celular , Cloro/química , Espectroscopia de Ressonância Magnética , Metilação , Camundongos , Microscopia Eletrônica de Varredura , Estrutura Molecular , Polietilenoglicóis/síntese químicaRESUMO
The manufacturing of plastics traditionally involves melt processing at temperatures typically greater than 200 degrees C-to enable extrusion or moulding under pressure into desired forms-followed by solidification. This process consumes energy and can cause substantial degradation of polymers and additives (such as flame retardants and ultraviolet stabilizers), limiting plastics performance and recyclability. It was recently reported that the application of pressure could induce melt-like behaviour in the block copolymer polystyrene-block-poly(n-butyl methacrylate) (PS-b-PBMA), and this behaviour has now been demonstrated in a range of other block copolymer systems. These polymers have been termed baroplastics. However, in each case, the order-to-disorder transition, which gives rise to the accompanying change in rheology from soft solid to melt, was observed at temperatures far exceeding the glass transition temperatures (T(g)) of both components. Here we show that baroplastic systems containing nanophase domains of one high-T(g) and one low-T(g) component can exhibit melt-like flow under pressure at ambient temperature through an apparent semi-solid partial mixing mechanism that substantially preserves the high-T(g) phase. These systems were shredded and remoulded ten times with no evident property degradation. Baroplastics with low-temperature formability promise lower energy consumption in manufacture and processing, reduced use of additives, faster production and improved recyclability, and also provide potential alternatives to current thermoplastic elastomers, rubber-modified plastics, and semi-crystalline polymers.