Prevalence and clinical impact of vitamin D deficiency in critically ill Korean patients with traumatic injuries: a single-center, prospective, observational study

Background This study investigated the prevalence and impact of 25-hydroxyvitamin D (25(OH) vitamin D) deficiency in critically ill Korean patients with traumatic injuries. Methods This prospective observational cohort study assessed the 25(OH) vitamin D status of consecutive trauma patients admitted to the trauma intensive care unit (TICU) of Kyungpook National University Hospital between January and December 2018. We analyzed the prevalence of 25(OH) vitamin D deficiency and its impact on clinical outcomes. Results There were no significant differences in the duration of mechanical ventilation (MV), lengths of TICU and hospital stays, and rates of nosocomial infection and mortality between patients with 25(OH) vitamin D <20 ng/ml and those with 25(OH) vitamin D ≥20 ng/ml within 24 hours of TICU admission. The duration of MV and lengths of TICU and hospital stays were shorter and the rate of nosocomial infection was lower in patients with 25(OH) vitamin D level ≥20 ng/ml on day 7 of hospitalization. The duration of MV, lengths of TICU and hospital stays, and nosocomial infection rate were significantly lower in patients with increased concentrations compared with those with decreased concentrations on day 7 of hospitalization, but the mortality rate did not differ significantly. Conclusions The 25(OH) vitamin D level measured within 24 hours after TICU admission was unrelated to clinical outcomes in critically ill patients with traumatic injuries. However, patients with increased 25(OH) vitamin D level after 7 days of hospitalization had better clinical outcomes than those with decreased levels

Paper on a disc: balancing the capillary-driven flow with a centrifugal force

This paper describes the active control of the capillary-driven flow in paper using a centrifugal device.close191

Prediction of ferroelectricity-driven Berry curvature enabling charge- and spin-controllable photocurrent in tin telluride monolayers

In symmetry-broken crystalline solids, pole structures of Berry curvature (BC) can emerge, and they have been utilized as a versatile tool for controlling transport properties. For example, the monopole component of the BC is induced by the time-reversal symmetry breaking, and the BC dipole arises from a lack of inversion symmetry, leading to the anomalous Hall and nonlinear Hall effects, respectively. Based on first-principles calculations, we show that the ferroelectricity in a tin telluride monolayer produces a unique BC distribution, which offers charge- and spin-controllable photocurrents. Even with the sizable band gap, the ferroelectrically driven BC dipole is comparable to those of small-gap topological materials. By manipulating the photon handedness and the ferroelectric polarization, charge and spin circular photogalvanic currents are generated in a controllable manner. The ferroelectricity in group-IV monochalcogenide monolayers can be a useful tool to control the BC dipole and the nonlinear optoelectronic responses

High-Throughput Genotyping in Metastatic Esophageal Squamous Cell Carcinoma Identifies Phosphoinositide-3-Kinase and BRAF Mutations

Background: Given the high incidence of metastatic esophageal squamous cell carcinoma, especially in Asia, we screened for the presence of somatic mutations using OncoMap platform with the aim of defining subsets of patients who may be potential candidate for targeted therapy. Methods and Materials We analyzed 87 tissue specimens obtained from 80 patients who were pathologically confirmed with esophageal squamous cell carcinoma and received 5-fluoropyrimidine/platinum-based chemotherapy. OncoMap 4.0, a mass-spectrometry based assay, was used to interrogate 471 oncogenic mutations in 41 commonly mutated genes. Tumor specimens were prepared from primary cancer sites in 70 patients and from metastatic sites in 17 patients. In order to test the concordance between primary and metastatic sites from the patient for mutations, we analyzed 7 paired (primary-metastatic) specimens. All specimens were formalin-fixed paraffin embedded tissues and tumor content was >70%. Results: In total, we have detected 20 hotspot mutations out of 80 patients screened. The most frequent mutation was PIK3CA mutation (four E545K, five H1047R and one H1047L) (N = 10, 11.5%) followed by MLH1 V384D (N = 7, 8.0%), TP53 (R306, R175H and R273C) (N = 3, 3.5%), BRAF V600E (N = 1, 1.2%), CTNNB1 D32N (N = 1, 1.2%), and EGFR P733L (N = 1, 1.2%). Distributions of somatic mutations were not different according to anatomic sites of esophageal cancer (cervical/upper, mid, lower). In addition, there was no difference in frequency of mutations between primary-metastasis paired samples. Conclusions: Our study led to the detection of potentially druggable mutations in esophageal SCC which may guide novel therapies in small subsets of esophageal cancer patients