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Comparative Sensitivity of MRI Indices for Myelin Assessment in Spinal Cord Regions.
Tomography
January 2025
Laboratory for Biomarker Imaging Science, Graduate School of Biomedical Science and Engineering, Hokkaido University, N15 W7, Kita-ku, Sapporo 060-8638, Japan.
Although multiple magnetic resonance imaging (MRI) indices are known to be sensitive to the noninvasive assessment of myelin integrity, their relative sensitivities have not been directly compared. This study aimed to identify the most sensitive MRI index for characterizing myelin composition in the spinal cord's gray matter (GM) and white matter (WM). MRI was performed on a deer's ex vivo cervical spinal cord.
View Article and Find Full Text PDFBrain microstructure alterations in subjective cognitive decline: a multi-component T2 relaxometry study.
Brain Commun
January 2025
Department of Clinical Psychology and Psychobiology, Universidade de Santiago de Compostela (USC), Santiago de Compostela 15782, Spain.
Previous research has revealed patterns of brain atrophy in subjective cognitive decline, a potential preclinical stage of Alzheimer's disease. However, the involvement of myelin content and microstructural alterations in subjective cognitive decline has not previously been investigated. This study included three groups of participants recruited from the Compostela Aging Study project: 53 cognitively unimpaired adults, 16 individuals with subjective cognitive decline and hippocampal atrophy and 70 with subjective cognitive decline and no hippocampal atrophy.
View Article and Find Full Text PDFCP/HA/HGF Conductive Composite Scaffolds with Synergistic Electrical Stimulation for Nerve Regeneration.
Macromol Biosci
January 2025
College of Life Science and Technology, Jinan University, Guangzhou, 510630, China.
The challenge of nerve regeneration stems from the diminished vitality of mature neurons post-injury. The construction of a suitable microenvironment at the injury site to facilitate axonal regeneration is a crucial aspect of nerve injury repair. In this work, a conductive and biocompatible composite material, CP/HA/HGF, is designed by grafting polypyrrole onto chitosan and compounding it with hyaluronic acid and functional short peptides for neural regeneration.
View Article and Find Full Text PDFHypoxia-induced conversion of sensory Schwann cells into repair cells is regulated by HDAC8.
Nat Commun
January 2025
Institute of Developmental Biology and Neurobiology, Faculty of Biology, Johannes Gutenberg University Mainz, Mainz, Germany.
After a peripheral nerve injury, Schwann cells (SCs), the myelinating glia of the peripheral nervous system, convert into repair cells that foster axonal regrowth, and then remyelinate or re-ensheath regenerated axons, thereby ensuring functional recovery. The efficiency of this mechanism depends however on the time needed for axons to regrow. Here, we show that ablation of histone deacetylase 8 (HDAC8) in SCs accelerates the regrowth of sensory axons and sensory function recovery.
View Article and Find Full Text PDFMagnetic field-oriented conductive decellularized extracellular matrix hydrogel synergizes with electrical stimulation to promote spinal cord injury repair and electrophysiological function restoration.
Biomater Adv
December 2024
Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Engineering Research Center of Biomedical Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, PR China. Electronic address:
Spinal cord injury (SCI) results in electrophysiological and behavioral dysfunction. Electrical stimulation (ES) is considered to be an effective treatment for mild SCI; however, ES is not applicable to severe SCI due to the disruption of electrical conduction caused by tissue defects. Therefore, the use of conductive materials to fill the defects and restore electrical conduction in the spinal cord is a promising therapeutic strategy.
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