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Accelerated Brain Aging Linked to Diabetes

Type 2 diabetes may be associated with brain degeneration, according to a new multicenter study published online in the journal Radiology. The study also found that, contrary to common clinical belief, diabetes may not be directly associated with small vessel ischemic disease, where the brain does not receive enough oxygenated blood.
“We found that patients having more severe diabetes had less brain tissue, suggesting brain atrophy,” said lead author R. Nick Bryan, professor of radiology at the Perleman School of Medicine at the University of Pennsylvania. “They did not seem to have more vascular disease due to the direct effect of diabetes.”
According the American Diabetes Association (ADA), nearly 26 million people in the United States have diabetes, and 1.9 million more are diagnosed with the disease each year. Type 2 is the most common form of diabetes. In type 2 diabetes, either the pancreas does not produce enough insulin or the cells ignore the insulin that is produced. The ADA estimates that, based on current trends, as many as one in three American adults will have diabetes in the year 2050.
“As diabetes becomes more common, better understanding of the disease and its management becomes even more important in order to minimize its effect on patient health,” Bryan said.
For the study, Bryan and colleagues used magnetic resonance imaging (MRI) to investigate the association between severity and duration of type 2 diabetes mellitus and brain structure in 614 patients (mean age 62 years) at four participating centers. The mean duration of disease in the study group was 9.9 years. The researchers specifically tested whether more severe diabetes was inversely correlated with brain volumes and positively correlated with ischemic lesion volumes.
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Source: Radiological Society of North America

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