Accumulation of amyloid precursor fragment in Alzheimer plaques
| Autor: | Eliezer Masliah, Hardy W. Chan, Robert D. Terry, Earl R. Shelton, Tsunao Saitoh, Gregory Cole |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Aging
Pathology medicine.medical_specialty Amyloid Neurite Molecular Sequence Data Hippocampus Biology Amyloid beta-Protein Precursor Epitopes Degenerative disease Alzheimer Disease mental disorders medicine Humans Senile plaques Amino Acid Sequence Protein Precursors Aged Aged 80 and over Brain Chemistry Amyloid beta-Peptides General Neuroscience Neurodegeneration P3 peptide medicine.disease Molecular biology Immunohistochemistry Neurology (clinical) Geriatrics and Gerontology Alzheimer's disease Developmental Biology Densitometry |
| Zdroj: | Neurobiology of aging. 12(2) |
| ISSN: | 0197-4580 |
| Popis: | Regenerative and degenerative neurites are components of classical senile plaques found in brain tissue of patients with Alzheimer's disease (AD). Amyloid beta/A4-protein derived from its precursor, amyloid beta/A4-protein precursor (APP/ABPP), constitutes the major portion of the amyloid core of senile plaques. A large N-terminal portion of APP (approximately Mr 100,000) is released from cells, leaving a minor C-terminal portion (approximately Mr 15,000) behind. A series of antisera against various sequences of APP were prepared and used to study the localization of each sequence in brain tissue. Plaque neurites stained as intensely as neuronal cell bodies with three antisera against the N-terminal portion of APP (N-terminal to a.a. 225), whereas five other antisera directed against the other C-terminal portions of APP (a.a. 284 to C-terminal) and antisera against the Kunitz-type protease inhibitor portion of APP stained plaque neurites less intensely than neuronal cell bodies in the hippocampus. These results suggest that a major part of the APP present in the neuritic component of senile plaques is a fragment representing the N-terminal one-third of the molecule. |
| Databáze: | OpenAIRE |
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