Pathogenesis of brain and spinal cord atrophy in multiple sclerosis

Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging
Alireza MinagarRoger E Kelley

Abstract

For more than a century, multiple sclerosis was viewed as a disease process characterized by oligodendrocyte and myelin loss, and research into the pathogenesis of multiple sclerosis was mainly focused on the mechanisms of inflammation. However, with development of more sophisticated neuroimaging and molecular biology techniques, attention has shifted to new aspects of pathogenesis of multiple sclerosis: axonal loss and neurodegeneration. Evidence is increasing that tissue destruction, primarily axonal loss and neurodegeneration, is a key element in the pathogenesis of multiple sclerosis. In addition, it is now known that brain and spinal cord atrophy begins early in the disease process of multiple sclerosis and advances relentlessly throughout the course of the disease. Cumulative data suggest that axonal loss is the major determinant of progressive neurologic disability in patients with multiple sclerosis. Magnetic resonance imaging and magnetic resonance spectroscopy in patients with multiple sclerosis for < 5 years indicate brain atrophy and loss of axonal integrity. Neurodegeneration and axonal loss in patients with multiple sclerosis are initially accompanied by a local response from oligodendrocyte progenitor cells and s...Continue Reading

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