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Evaluation of synaptotagmin-1 action models by all-atom molecular dynamics simulations.
FEBS Open Bio
January 2025
Institute of Neurophysiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Germany.
Neurotransmitter release is triggered in microseconds by the two C domains of the Ca sensor synaptotagmin-1 and by SNARE complexes, which form four-helix bundles that bridge the vesicle and plasma membranes. The synaptotagmin-1 CB domain binds to the SNARE complex via a 'primary interface', but the mechanism that couples Ca-sensing to membrane fusion is unknown. Widespread models postulate that the synaptotagmin-1 Ca-binding loops accelerate membrane fusion by inducing membrane curvature, perturbing lipid bilayers or helping bridge the membranes, but these models do not seem compatible with SNARE binding through the primary interface, which orients the Ca-binding loops away from the fusion site.
View Article and Find Full Text PDFA review of novel methods to assist digital planning and execution of osteotomy for upper limb deformities.
Biomed Eng Online
January 2025
Department of Orthopaedic Surgery, NHO Mito Medical Center Hospital, Ibaraki, Ibaraki, 311-3193, Japan.
Corrective osteotomy for upper limb deformities caused by fractures, trauma, or degeneration necessitates detailed preoperative planning to ensure accurate anatomical alignment, restore limb length, and correct angular deformities. This review evaluates the effectiveness of a three-dimensional (3D) preoperative planning program and an image fusion system designed for intraoperative guidance during corrective osteotomy procedures. The application processes and clinical outcomes observed with these technologies in various surgical scenarios involving the upper extremities were summarized.
View Article and Find Full Text PDFCausal analysis for multivariate integrated clinical and environmental exposures data.
BMC Med Inform Decis Mak
January 2025
Renaissance Computing Institute, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
Electronic health records (EHRs) provide a rich source of observational patient data that can be explored to infer underlying causal relationships. These causal relationships can be applied to augment medical decision-making or suggest hypotheses for healthcare research. In this study, we explored a large-scale EHR dataset on patients with asthma or related conditions (N = 14,937).
View Article and Find Full Text PDFBiomechanical simulation of bed turning post-acetabular fracture fixation.
Sci Rep
January 2025
Department of Orthopaedic, South China Hospital of Shenzhen University, Shenzhen, 518116, Guangdong, China.
Before patients begin out-of-bed exercises following internal fixation surgery for acetabular fractures, turning over in bed serves as a crucial intervention to mitigate complications associated with prolonged bed rest. However, data on the safety of this maneuver post-surgery are limited, and the biomechanical evidence remains unclear. This study aims to introduce a novel loading protocol designed to preliminarily simulate the action of turning over in bed and to compare the biomechanical properties of two fixation methods for acetabular fractures under this new protocol.
View Article and Find Full Text PDFImpact of Ga-FAPI positron emission tomography/computed tomography on staging and tumor management in patients with gastric cancer.
J Cancer Res Clin Oncol
January 2025
Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, 37 Guoxue Alley, Chengdu, Sichuan, 610041, China.
Purpose: To evaluate the added value of additional Ga-FAPI PET/CT following CT for primary staging, detection of postoperative recurrence, and management of gastric cancer patients.
Methods: We retrospectively included patients with gastric cancers who underwent contrast-enhanced computed tomography (ceCT), followed by Ga-FAPI PET/CT within 30 days. Ga-FAPI PET/CT was performed for initial staging or detection of postoperative recurrence.
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