Genetic Studies on Chromosome 12 in Late-Onset Alzheimer Disease

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Genetic studies on chromosome 12 in late-onset Alzheimer disease.

CONTEXT The only genetic locus universally accepted to be important as a risk factor for late-onset Alzheimer disease (AD) is the apolipoprotein E (APOE) locus on chromosome 19. However, this locus does not account for all the risk in late-onset disease, and a recent report has suggested a second locus on chromosome 12p11-12. OBJECTIVE To look for evidence of linkage on chromosome 12 and to t...

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Genome-wide association study implicates a chromosome 12 risk locus for late-onset Alzheimer disease.

Only Apolipoprotein E polymorphisms have been consistently associated with the risk of late-onset Alzheimer disease (LOAD), but they represent only a minority of the underlying genetic effect. To identify additional LOAD risk loci, we performed a genome-wide association study (GWAS) on 492 LOAD cases and 498 cognitive controls using Illumina's HumanHap550 beadchip. An additional 238 cases and 2...

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Effect of heterogeneity on the chromosome 10 risk in late-onset Alzheimer disease.

With the exception of ApoE (APOE), no universally accepted genetic association has been identified with late-onset Alzheimer disease (AD). A broad region of chromosome 10 has engendered continued interest generated from both preliminary genetic linkage and candidate gene studies. To better examine this region, we combined unbiased genetic linkage with candidate gene association studies. We geno...

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Pathophysiology of Late Onset Alzheimer Disease

As the world population has aged, the number of people affected by Alzheimer Disease is rapidly increasing in the world. It is important for clinicians to recognize early signs and symptoms of dementia and to note potentially modifiable risk factors and early disease markers. Accumulation of A┚ peptides may be the key event in pathogenesis of AD. The exact mechanism by which A┚ peptide depositi...

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Mutational Screening in Exon 6 of the PSEN2 Gene in Iranian Patients with Late-Onset Alzheimer\'s Disease

Background and Aims: One of the most important genes involved in Alzheimer's disease (AD) is the presenilin2 (PSEN2) gene, which is one of the main constituents of the gamma-secretase complex. Mutations in this gene promote the formation of amyloid plaques resulting in AD. The study aimed to evaluate the mutation variant in exon 6 of the PSEN2 gene in patients with Late-Onset AD (LOAD). Due to ...

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ژورنال

عنوان ژورنال: JAMA

سال: 1998

ISSN: 0098-7484

DOI: 10.1001/jama.280.7.619