期刊
ANNALS OF NUCLEAR MEDICINE
卷 29, 期 1, 页码 78-83出版社
SPRINGER
DOI: 10.1007/s12149-014-0911-0
关键词
Dementia with Lewy bodies; Glucose metabolism; Amyloid deposit; PET
资金
- Japan Society for the Promotion of Science KAKENHI Grant [50534103]
- 21st Century Research and Development Incentive Wages at Kinki University
- Grants-in-Aid for Scientific Research [25461854] Funding Source: KAKEN
There is evidence that some cases of patients with dementia with Lewy bodies (DLB) can demonstrate Alzheimer disease (AD) like reduced glucose metabolism without amyloid deposition. The aim of this study was to clarify whether regional hypometabolism is related to amyloid deposits in the DLB brain and measure the degree of regional hypometabolism. Ten consecutive subjects with DLB and 10 AD patients who underwent both Pittsburgh compound B (PiB)-PET and F-18-fluoro-2-deoxyglucose (FDG)-PET were included in this study. Regional standardized uptake value ratio (SUVR)s normalised to cerebellar cortices were calculated in the FDG- and PiB-PET images. All AD patients and five DLB patients showed amyloid deposits (PiB positive). In the DLB group the parietotemporal and occipital metabolism were significantly lower than those in the AD group but there was no difference between the posterior cingulate hypometabolism between DLB and AD groups. There were no differences in regional glucose metabolism between PiB positive and negative DLB patients. In the DLB brain, it is suggested that decreased regional glucose metabolism is unrelated to amyloid deposits, although the hypometabolic area overlaps with the AD hypometabolic area and the degree of parietotemporal and occipital hypometabolism in DLB brain is much larger than that in AD brain.
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