Effect of age and the APOE gene on metabolite concentrations in the posterior cingulate cortex
| العنوان: | Effect of age and the APOE gene on metabolite concentrations in the posterior cingulate cortex |
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| المؤلفون: | Suri, S, Emir, U, Stagg, C, Near, J, Mekle, R, Schubert, F, Zsoldos, E, Mahmood, A, Singh-Manoux, A, Kivimaki, M, Ebmeier, K, Mackay, C, Filippini, N |
| المصدر: | Neuroimage |
| بيانات النشر: | Academic Press, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Adult, Aged, 80 and over, Male, Aging, Posterior cingulate cortex, Precuneus, Cognitive Neuroscience, Proton Magnetic Resonance Spectroscopy, Apolipoprotein E4, APOE gene, Middle Aged, Gyrus Cinguli, Article, Young Adult, Neurology, Magnetic resonance spectroscopy, Metabolites, Humans, Female, Aged |
| الوصف: | Proton magnetic resonance spectroscopy (1H-MRS) has provided valuable information about the neurochemical profile of Alzheimer's disease (AD). However, its clinical utility has been limited in part by the lack of consistent information on how metabolite concentrations vary in the normal aging brain and in carriers of apolipoprotein E (APOE) ε4, an established risk gene for AD. We quantified metabolites within an 8 cm3 voxel within the posterior cingulate cortex (PCC)/precuneus in 30 younger (20–40 years) and 151 cognitively healthy older individuals (60–85 years). All 1H-MRS scans were performed at 3 T using the short-echo SPECIAL sequence and analyzed with LCModel. The effect of APOE was assessed in a sub-set of 130 volunteers. Older participants had significantly higher myo-inositol and creatine, and significantly lower glutathione and glutamate than younger participants. There was no significant effect of APOE or an interaction between APOE and age on the metabolite profile. Our data suggest that creatine, a commonly used reference metabolite in 1H-MRS studies, does not remain stable across adulthood within this region and therefore may not be a suitable reference in studies involving a broad age-range. Increases in creatine and myo-inositol may reflect age-related glial proliferation; decreases in glutamate and glutathione suggest a decline in synaptic and antioxidant efficiency. Our findings inform longitudinal clinical studies by characterizing age-related metabolite changes in a non-clinical sample. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1095-9572 1053-8119 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=pmid_dedup__::4a22f6002dfd59248a99180a04d3ec3bTest http://europepmc.org/articles/PMC5440729Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.pmid.dedup....4a22f6002dfd59248a99180a04d3ec3b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10959572 10538119 |
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