new link revealed between alzheimer\s disease and healthy
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Last Updated : GMT 05:17:37
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New link revealed between alzheimer\'s disease and healthy

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Tehran - Fna

Alzheimer\'s disease and frontotemporal lobar degeneration (FTLD) are two of the most prevalent forms of neurodegenerative disorders. In a study published online August 15 in Genome Research, researchers have analyzed changes in gene expression in the aging and diseased brain, finding new clues to the biology of normal aging and neurodegenerative diseases. Recent studies have identified changes in how genes are read, or expressed, in the brain either during aging or with neurodegenerative disease. However, no previous study had directly compared gene expression changes in healthy aging with those in diseased individuals. In this report, an international team of researchers analyzed and compared changes in gene expression associated with aging and disease in a region of the brain known to be affected in both Alzheimer\'s and FTLD. Comparing samples from healthy individuals ranging from 16 to 102 years old with samples from diseased individuals, the investigation uncovered striking similarity in the changes in gene expression patterns associated with aging and the neurodegenerative diseases. \"Surprisingly, these [diseased] samples contained the same aging-related changes as healthy individuals over the age of 80,\" said Dr. Jernej Ule of the MRC Laboratory of Molecular Biology, senior author of the study. \"Aging-related changes were apparent in the diseased individuals as young as 50 years,\" noted Dr. James Tollervey of the MRC Laboratory of Molecular Biology, the first author of the study, \"roughly 25 years before we would expect to see similar changes in healthy individuals.\" While the similarities were striking, the group also observed notable differences between gene expression in the normal aging brain and expression in Alzheimer\'s and FTLD, particularly in the patterns of alternative splicing, a process by which parts of a RNA molecule are arranged differently to change the message, which can be potentially harmful if misregulated. In normal aging, changes in alternative splicing largely affected genes associated with cellular metabolism, while disease-specific changes were associated with genes involved in neuron-specific function. The group found that there were changes in the expression of several genes coding for RNA binding proteins, which is likely responsible for at least part of the observed alterations in splicing. The authors expect that this work will have broad impact for further insight into both normal aging and neurodegenerative disease. \"These findings indicate that studies of healthy aging could help unravel the processes that lead to neurodegeneration,\" said Ule. \"Conversely, our findings also indicate that studies of neurodegenerative diseases might help us understand how to delay the changes that take place in healthy individuals at an advanced age,\" added Dr. Boris Rogelj of the MRC Centre for Neurodegeneration Research at King\'s College London, a co-author of the study  

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new link revealed between alzheimer\s disease and healthy new link revealed between alzheimer\s disease and healthy

 



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new link revealed between alzheimer\s disease and healthy new link revealed between alzheimer\s disease and healthy

 



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