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[Cerebral degeneration in Down's syndrome].
Folia Psychiatrica Et Neurologica Japonica
|January 1, 1979
Summary
Individuals with Down syndrome exhibit premature brain aging. Neuropathological studies reveal Alzheimer's-like changes, including mineral deposits and neurofibrillary tangles, increasing with age.
Area of Science:
- Neuropathology
- Gerontology
- Genetics
Background:
- Down syndrome (DS) is associated with an increased risk of developing Alzheimer's disease (AD)-like neuropathology.
- Understanding the spectrum and progression of these changes is crucial for managing DS cognitive health.
Observation:
- Two cases of DS (63-year-old male, 25-year-old female) presented with distinct neuropathological findings.
- The older patient showed intense Alzheimer's disease features, including congophilic angiopathy and mineral deposits.
- The younger patient exhibited early AD markers like plaque-like bodies and neurofibrillary tangles.
Findings:
- Alzheimer's disease-like pathology is common in DS patients over 50.
- Plaque-like bodies can appear in the second decade, neurofibrillary tangles in the third, and congophilic angiopathy in the fourth decade of life.
- Extensive mineral deposits, particularly calcium, are frequent and considered significant histopathological substrates in DS.
Implications:
- DS brains show accelerated aging, with pathology becoming more pronounced with age.
- Clinical presentation in long-surviving DS patients resembles non-specific brain aging rather than typical Alzheimer's disease.
- These findings highlight the importance of age-related neuropathological monitoring in individuals with Down syndrome.