Ischiadic nerves of 24-month old rats were examined by electron-microscopic technique. It was established that a large part of myelin fibres had degenerative changes, manifested at various degree. Axonal cylinder was atrophied even to complete disappearance. Myelin fibres endured degeneration, ending with sequestration and fragmentation. In part of the involved fibres the myelin sheaths preserved their intactness, but collapsed due to atrophy of the axon.
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Front Neuroanat
January 2025
Department of Anatomy, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates.
Neuropathic pain is a pervasive health concern worldwide, posing significant challenges to both clinicians and neuroscientists. While acute pain serves as a warning signal for potential tissue damage, neuropathic pain represents a chronic pathological condition resulting from injury or disease affecting sensory pathways of the nervous system. Neuropathic pain is characterized by long-lasting ipsilateral hyperalgesia (increased sensitivity to pain), allodynia (pain sensation in response to stimuli that are not normally painful), and spontaneous unprovoked pain.
View Article and Find Full Text PDFFront Cell Neurosci
January 2025
Laboratório de Neurodegeneração e Reparo - Departamento de Anatomia Patológica, Hospital Universitário Clementino Fraga Filho, HUCFF/UFRJ, Rio de Janeiro, Brazil.
Background: Following transection, nerve repair using the polylactic acid (PLA) conduit is an effective option. In addition, inosine treatment has shown potential to promote nerve regeneration. Therefore, this study aimed to investigate the regenerative potential of inosine after nerve transection and polylactic acid conduit repair.
View Article and Find Full Text PDFEgypt J Immunol
January 2025
Department of Clinical Pathology, Faculty of Medicine, Assiut University, Assiut 71515, Egypt.
Multiple sclerosis (MS) is a disease of the central nervous system, characterized by progressive demyelination and inflammation. MS is characterized by immune system attacks on the myelin sheath surrounding nerve fibers. Genome-wide association studies revealed a polymorphism in the signal transducer and activator of transcription 4 (STAT4) gene that increases risk for MS.
View Article and Find Full Text PDFJ Mol Histol
January 2025
School of Stomatology, The First Affiliated Hospital of Harbin Medical University, Harbin Medical University, Harbin, 150000, China.
Facial nerve injuries lead to significant functional impairments and psychological distress for affected patients. Effective repair of these injuries remains a challenge. For longer nerve gaps, the regeneration outcomes after nerve grafting remain suboptimal due to limited sources and postoperative immune responses.
View Article and Find Full Text PDFBiomedicines
December 2024
Department of Histology, Jagiellonian University Medical College, Kopernika 7, 31-034 Krakow, Poland.
Background: The levels of β-amyloid precursor protein (β-APP), tau protein, and phosphorylation of tau (p-tau) protein were examined by quantitative immunohistochemistry in the spinal cord sections of mice suffering from experimental autoimmune encephalomyelitis (EAE) in the successive phases of the disease: onset, peak, and chronic.
Methods: EAE was induced in C57BL/6 mice by immunization with MOG35-55 peptide. The degree of pathological changes was assessed in cross-sections of the entire spinal cord.
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