The isolated human cortex. A Golgi analysis of Krabbe's disease

Area of Science:

• Neuroscience
• Cell Biology
• Neuropathology

Background:

• Krabbe's disease is a rare, fatal genetic disorder.
• It affects the myelin sheath of nerve cells in the central and peripheral nervous systems.
• Clinical manifestations include seizures and developmental regression.

Observation:

• A child with Krabbe's disease presented with seizures and EEG abnormalities.
• Autopsy revealed near-complete destruction of myelinated subcortical axons.
• Cortical neurons and their local connections appeared morphologically normal despite myelin loss.

Findings:

• Despite extensive myelin loss, cortical neurons retained normal morphology.
• Local intracortical synaptic connections appear to sustain neuronal structure.
• Preserved neuronal morphology highlights the importance of intrinsic neuronal circuits.

Implications:

• Synaptic remodeling within local circuits may explain cortical hyperexcitability in Krabbe's disease.
• Understanding these mechanisms could inform therapeutic strategies for leukodystrophies.
• This study emphasizes the resilience of neuronal structure supported by local connections.