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- W2507557936 abstract "The brain’s default mode network (DMN), having a high rate of basal energy metabolism, is vulnerable to altered glucose metabolism in type 2 diabetes mellitus (T2DM) due to insulin resistance and chronic hyperglycemia. Previous studies showed that functional connectivity and structural connectivity among the DMN nodal regions are compromised in T2DM. We applied magnetization transfer imaging to examine the impact of T2DM on the biophysical integrity of the DMN. The results showed that the biophysical integrity of macromolecular protein pools in the posterior cingulate cortex (PCC), a central DMN hub region, was selectively compromised in T2DM, whereas the other nodal regions of the DMN, including the medial prefrontal cortex, lateral inferior parietal cortex, precuneus, and medial and lateral temporal cortices, were biophysically intact compared with those of control subjects without diabetes. Furthermore, the degree of biophysical impairment of the PCC correlated with both hyperglycemia and vascular compromise, the two physiological hallmarks of diabetes. These new findings demonstrate that the PCC is vulnerable in the DMN and may shed light on the molecular neurobiology of T2DM and help to elucidate the pathophysiology of diabetes-related cognitive comorbidities and increased risk for dementia." @default.
- W2507557936 created "2016-09-16" @default.
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- W2507557936 date "2016-08-19" @default.
- W2507557936 modified "2023-10-11" @default.
- W2507557936 title "Metabolic Aberrations Impact Biophysical Integrity of Macromolecular Protein Pools in the Default Mode Network" @default.
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- W2507557936 doi "https://doi.org/10.2337/db15-1714" @default.
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