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exia, Sarcopenia and Muscle published by John Wiley & Sons Ltd on behalf of Society on Sarcopenia, Cachexia and Wasting Disorders.Nanopores have become powerful and versatile tools for measuring single molecules since its emergence in the mid-1990s. They can be used to sense a wide variety of analytes including metal ions, small organic molecules, DNA/RNA, proteins, etc., to monitor chemical reactions, and to sequence DNA. Recently, enzymes have been studied using nanopore technologies. In this Minireview, we highlight recent efforts in developing nanopore enzymology and categorize the related work into three groups (i) measuring enzymatic activities with nanopore-enzyme hybrid; (ii) measuring enzymatic activities through sensing their catalytic products with nanopores; (iii) the use of enzymes for DNA sequencing and DNA/protein translocation. In the end, we discuss challenges and opportunities in nanopore enzymology. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.OBJECTIVE To investigate the optimal level of femoral neck for measuring femoral anteversion to predict postoperative stem anteversion in Crowe type I developmental dysplasia of the hip. METHODS This retrospective study analyzed 108 Crowe type I hips that underwent THA between January 2016 and December 2017, including 70 women and 19 men with a mean age of 63.08 ± 9.13 (range, 41-83) years. The single-wedge stem was used in 37 hips, the double-wedge stem was used in 71 hips. Computed tomography scans were performed pre- and post-operation. Femoral anteversion at six levels of the proximal femur were measured via preoperative two-dimensional computed tomography. Femoral anteversion at the level of the femoral neck osteotomy plane and postoperative stem anteversion were measured via three-dimensional reconstructed models. RESULTS The mean follow-up period was 18.5 months (range, 12-27 months). The mean preoperative Harris Hip Score was 51.5 ± 8.7 and improved to 90.4 ± 7.8 (P less then 0.001) by the last foll 10-mm level above the proximal base of lesser trochanter (22.65 ± 12.92) displayed the smallest difference (-1.72° ± 8.90°) and a good correlation (r = 0.764) with postoperative stem anteversion for all 108 hips, with a moderate correlation of 0.465 for single-wedge stem hips and an excellent correlation of 0.821 for double-wedge stem hips. CONCLUSION For Crowe type I hips, femoral anteversion would be different if it was measured via different levels of the femoral neck. The 10-mm level above the proximal base of the lesser trochanter could be an optimum choice for measuring femoral anteversion to predict postoperative stem anteversion. © 2020 The Authors. Orthopaedic Surgery published by Chinese Orthopaedic Association and John Wiley & Sons Australia, Ltd.OBJECTIVES To assess the clinical significance of a novel optical coherence tomography (OCT)-derived volumetric parameter of stent expansion by comparing it with the conventional parameters in real-world practice. BACKGROUND The clinical significance of novel parameters in real-world practice including longer and smaller stents remains to be elucidated. METHODS A total of 226 de novo lesion treated with drug-eluting stents in 208 consecutive patients were enrolled. click here Stent expansion was retrospectively assessed on the final OCT images after stent implantation. The novel parameter was the minimum expansion index (MEI) calculated using a novel algorithm that yields the ideal lumen area in each frame by taking into account vessel tapering. The device-oriented clinical end point (DoCE) included cardiac death, target vessel-related myocardial infarction, ischemia-driven target lesion revascularization. RESULTS The MEI in the lesions with a DoCE (n = 22) at 2 years and cases without a DoCE (n = 204) was 64.3 ± 12.0% and 78.5 ± 14.6%, respectively (p less then .001). In the receiver operating characteristic curve analyses, the areas under the curve for the MEI (0.787; p less then .001) were larger than that for %stent expansion (0.718; p = .001) and minimum stent area (0.664; p = .004) in predicting the DoCE. The best cutoff of MEI for predicting the DoCE was 74.0. CONCLUSIONS The novel MEI was better than the conventional %stent expansion and minimum stent area for predicting DoCE. © 2020 Wiley Periodicals, Inc.INTRODUCTION Hemorrhage and infection are two main causes of death in patients with myelodysplastic syndromes (MDS), and it is becoming increasingly clear that platelet dysfunction can also affect the process of hemostasis and anti-infection. The aim of this study was to evaluate activation function and immune-related function of platelets in MDS. METHODS We included 29 MDS patients and divided them into different subgroups (low-risk group and high-risk group; untreated group and treated group; pretransfusion group and post-transfusion group) according to IPSS-R score, hypomethylating agents (HMAs) therapy, and platelet transfusion history. Platelet light scatter properties, expression of CD41a, activation-associated phenotypes (CD62p and CD63), and immune-associated phenotypes (CD154 and TLR4) were detected by multiparameter flow cytometry. RESULTS Expression of CD41a was decreased (P .05). Significantly decreased expression frequency and intensity of activation phenotype CD63 were found in patients with MDS (P less then .05). Low-risk MDS showed lower expression frequency while high-risk MDS showed reduced mean fluorescence intensity (MFI) of CD63. Decreased expression of CD154 and TLR4 was found in MDS patients (P less then .05) which was significantly elevated after HMAs therapy (P less then .05). Particularly, MFI of CD154 and TLR4 reduced in high-risk MDS patients (P less then .05). CONCLUSION Myelodysplastic syndromes patients displayed defective expression of both activation- and immune-associated platelet phenotypes, with differential mechanisms between low-risk and high-risk groups regarding phenotype alterations. The findings confirmed impaired platelet phenotypes in MDS which may assist in the diagnosis and identification of MDS patients. © 2020 John Wiley & Sons Ltd.
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