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Remyelination in the human central nervous system
N R Ghatak1, R T Leshner, A C Price
1Department of Pathology (Neuropathology), Medical College of Virginia, Virginia Commonwealth University, Richmond 23298.
Journal of Neuropathology and Experimental Neurology
|September 1, 1989
Summary
Early remyelination in the human central nervous system (CNS) is possible, even in young patients. This study observed early myelin repair in a adolescent, leading to significant functional recovery and lesion resolution.
Area of Science:
- Neuroscience
- Neuropathology
- Demyelinating Diseases
Background:
- Remyelination, the repair of myelin sheaths, occurs in the human central nervous system (CNS), but its initial stages and full extent remain poorly understood.
- Limited data exists on the early morphological changes and functional outcomes of remyelination in human CNS demyelinating lesions.
Observation:
- A biopsy from a 15-year-old boy, two weeks post-symptom onset, revealed a demyelinated lesion with early signs of remyelination.
- The lesion showed increased cellularity with numerous oligodendrocytes actively forming new myelin.
- Astrocytes contained oligodendrocytes, a novel observation in this context.
Findings:
- Morphological evidence of early remyelination was observed in the human CNS biopsy.
- The patient experienced complete functional recovery and near-total resolution of white matter lesions over several months.
- These findings suggest that early remyelination can lead to extensive myelin repair and clinical recovery.
Implications:
- Clinically significant remyelination is achievable in the human CNS.
- The observed process closely resembles remyelination in experimental animal models, suggesting conserved mechanisms.
- This study provides crucial insights into the potential for myelin repair in neurological disorders.