کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6805990 | 1433568 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Brain glucose and acetoacetate metabolism: a comparison of young and older adults
ترجمه فارسی عنوان
متابولیسم قند و متابولیسم اتوکارتون: مقایسه بین افراد جوان و سالخوردگان
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
سالمندی
چکیده انگلیسی
The extent to which the age-related decline in regional brain glucose uptake also applies to other important brain fuels is presently unknown. Ketones are the brain's major alternative fuel to glucose, so we developed a dual tracer positron emission tomography protocol to quantify and compare regional cerebral metabolic rates for glucose and the ketone, acetoacetate. Twenty healthy young adults (mean age, 26 years) and 24 healthy older adults (mean age, 74 years) were studied. In comparison with younger adults, older adults had 8 ± 6% (mean ± SD) lower cerebral metabolic rates for glucose in gray matter as a whole (p = 0.035), specifically in several frontal, temporal, and subcortical regions, as well as in the cingulate and insula (p ⤠0.01, false discovery rate correction). The effect of age on cerebral metabolic rates for acetoacetate in gray matter did not reach significance (p = 0.11). Rate constants (minâ1) of glucose (Kg) and acetoacetate (Ka) were significantly lower (â11 ± 6%; [p = 0.005], and â19 ± 5%; [p = 0.006], respectively) in older adults compared with younger adults. There were differential effects of age on Kg and Ka as seen by significant interaction effects in the caudate (p = 0.030) and post-central gyrus (p = 0.023). The acetoacetate index, which expresses the scaled residuals of the voxel-wise linear regression of glucose on ketone uptake, identifies regions taking up higher or lower amounts of acetoacetate relative to glucose. The acetoacetate index was higher in the caudate of young adults when compared with older adults (p ⤠0.05 false discovery rate correction). This study provides new information about glucose and ketone metabolism in the human brain and a comparison of the extent to which their regional use changes during normal aging.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neurobiology of Aging - Volume 35, Issue 6, June 2014, Pages 1386-1395
Journal: Neurobiology of Aging - Volume 35, Issue 6, June 2014, Pages 1386-1395
نویسندگان
Scott Nugent, Sebastien Tremblay, Kewei W. Chen, Napatkamon Ayutyanont, Auttawut Roontiva, Christian-Alexandre Castellano, Melanie Fortier, Maggie Roy, Alexandre Courchesne-Loyer, Christian Bocti, Martin Lepage, Eric Turcotte, Tamas Fulop,