Alteration patterns of brain glucose metabolism: comparisons of healthy controls, subjective memory impairment and mild cognitive impairment.

Abstract

BACKGROUND:

Some groups have focused on the detection and management of subjective memory impairment (SMI) as the stage that precedes mild cognitive impairment (MCI). However, there have been few clinical studies that have examined biomarkers of SMI to date.

PURPOSE:

To investigate the differences in glucose metabolism as a prodromal marker of dementia in patients with SMI, MCI, and healthy controls using brain F-18 fluoro-2-deoxyglucose positron emission tomography (FDG-PET).

MATERIAL AND METHODS:

Sixty-eight consecutive patients with SMI, 47 patients with MCI, and 42 age-matched healthy subjects were recruited. All subjects underwent FDG-PET and detailed neuropsychological testing. FDG-PET images were analyzed using the statistical parametric mapping (SPM) program.

RESULTS:

FDG-PET analysis showed glucose hypometabolism in the periventricular regions of patients with SMI and in the parietal, precentral frontal, and periventricular regions of patients with MCI compared with healthy controls. Interestingly, hypometabolism on FDG-PET was noted in the parietal and precentral frontal regions in MCI patients compared to SMI patients.

CONCLUSION:

The results suggest that hypometabolism in the periventricular regions as seen on FDG-PET may play a role as a predictive biomarker of pre-dementia, and the extension of reduced glucose metabolism into parietal regions likely reflects progression of cognitive deterioration.

• Authors: In-Uk Song, Eun Kyoung Choi, Jin Kyoung Oh, Yong-An Chung, Sung-Woo Chung
• Journal: Acta radiologica (Stockholm, Sweden : 1987) (Acta Radiol) Vol. 57 Issue 1 Pg. 90-7 (Jan 2016) ISSN: 1600-0455 [Electronic] England
• PMID: 25538106 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © The Foundation Acta Radiologica 2014.

Chemical References

• Radiopharmaceuticals
• Fluorodeoxyglucose F18
• Glucose

Topics

• Aged
• Brain (diagnostic imaging, metabolism)
• Case-Control Studies
• Cognitive Dysfunction
• Female
• Fluorodeoxyglucose F18
• Glucose (metabolism)
• Humans
• Magnetic Resonance Imaging
• Male
• Memory Disorders
• Neuropsychological Tests
• Positron-Emission Tomography (methods)
• Prospective Studies
• Radiopharmaceuticals