Disease |
Type of Aggregation |
Cellular Localization |
Factor Involved |
Brain Region Affected |
Alzheimer's Disease (AD) |
Neuritic Plaques |
Extracellular |
Amyloid beta peptide |
Cortex, hippocampus, basal forebrain, brain stem |
Neurofibrillary tangles |
Intracellular |
Hyperphosphorylated Tau |
Parkinson's Disease (PD) |
Lewy Body |
Intracellular (Cytoplasm) |
α-Synuclein |
Substantia nigra, cortex, locus ceruleus, rephe (dopaminergic neurons) |
Huntington's Disease (HD) |
Intranuclear inclusions & cytoplasmic aggregates |
Intracellular |
Huntingtin with polyglutamate expansion |
Striatum, basal ganglia, cortex, others |
Amyotrophic Lateral Sclerosis (ALS) |
Bonina bodies and axonal spheroids |
Intracellular (Cytoplasm) |
Various ALS genes |
Spinal motor neurons and motor cortex |
Prion Disease |
Amyloid Plaque |
Intracellular & Extracellular |
Prion protein |
Cortex, brain stem, thalamus, cerebellum, other |