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Journal ArticleDOI

Absence of linkage of chromosome 21q21 markers to familial Alzheimer's disease

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TLDR
No evidence for linkage was found between familial Alzheimer's disease (FAD) and chromosome 21q21 markers (D 21S1/D21S72 and the amyloid beta gene) and data indicate that FAD is genetically heterogeneous.
Abstract
Alzheimer's disease is the most common form of dementia among the elderly population. Although the etiology is unknown, inheritance plays a role in the pathogenesis of the disease. Recent work indicates that an autosomal dominant gene for Alzheimer's disease is located on chromosome 21 at band q21. In the present study of a group of autopsy-documented kindreds, no evidence for linkage was found between familial Alzheimer's disease (FAD) and chromosome 21q21 markers (D21S1/D21S72 and the amyloid beta gene). Linkage to the D21S1/D21S72 locus was excluded at recombination fractions (theta) up to 0.17. Linkage to the amyloid gene was excluded at theta = 0.10. Apparent recombinants were noted in two families for the amyloid gene and in five families for the D21S1/D21S72 locus. These data indicate that FAD is genetically heterogeneous.

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Journal ArticleDOI

Segregation of a missense mutation in the amyloid precursor protein gene with familial Alzheimer's disease.

TL;DR: A locus segregating with familial Alzheimer's disease (AD) has been mapped to chromosome 21, close to the amyloid precursor protein (APP) gene as discussed by the authors, which suggests that some cases of AD could be caused by mutations in the APP gene.

Segregation of a missense mutation in the amyloid precursor protein gene with familial alzheimers-disease

TL;DR: It is demonstrated that in this kindred, which shows linkage to chromosome 21 markers, there is a point mutation in the APP gene that causes an amino-acid substitution close to the carboxy terminus of the β-amyloid peptide.
Journal ArticleDOI

Physical basis of cognitive alterations in Alzheimer's disease: synapse loss is the major correlate of cognitive impairment.

TL;DR: Both linear regressions and multivariate analyses correlating three global neuropsychological tests with a number of structural and neurochemical measurements performed on a prospective series of patients with Alzheimer's disease and 9 neuropathologically normal subjects reveal very powerful correlations with all three psychological assays.
Journal ArticleDOI

The molecular pathology of Alzheimer's disease.

TL;DR: The salient features of the altered biochemistry of AD brain tissue and the possible role of these changes in the pathogenesis of this complex disease are reviewed here.
References
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Journal ArticleDOI

Clinical diagnosis of Alzheimer's disease : report of the NINCDS-ADRDA Work Group under the auspices of Department of Health and Human Services Task Force on Alzheimer's Disease

TL;DR: The criteria proposed are intended to serve as a guide for the diagnosis of probable, possible, and definite Alzheimer's disease; these criteria will be revised as more definitive information becomes available.
Journal ArticleDOI

A technique for radiolabeling DNA restriction endonuclease fragments to high specific activity

TL;DR: A technique for conveniently radiolabeling DNA restriction endonuclease fragments to high specific activity is described, and these "oligolabeled" DNA fragments serve as efficient probes in filter hybridization experiments.

A technique for radiolabeling DNA restriction endonuclease fragments to high specific activity

TL;DR: In this article, a technique for conveniently radiolabeling DNA restriction endonuclease fragments to high specific activity is described, where DNA fragments are purified from agarose gels directly by ethanol precipitation and are then denatured and labeled with the large fragment of DNA polymerase I, using random oligonucleotides as primers.
Journal ArticleDOI

The precursor of Alzheimer's disease amyloid A4 protein resembles a cell-surface receptor

TL;DR: An apparently full-length complementary DNA clone coding for the A4 polypeptide is isolated and sequenced and suggests that the cerebral amyloid deposited in Alzheimer's disease and aged Down's syndrome is caused by aberrant catabolism of a cell-surface receptor.
Journal ArticleDOI

Amyloid plaque core protein in Alzheimer disease and Down syndrome

TL;DR: The shared 4-kDa subunit indicates a common origin for the amyloids of the plaque core and of the congophilic angiopathy of Alzheimer disease and Down syndrome.
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