期刊
THERANOSTICS
卷 6, 期 8, 页码 1220-1231出版社
IVYSPRING INT PUBL
DOI: 10.7150/thno.15362
关键词
hepatic encephalopathy; positron emission tomography; neuroinflammation; ibuprofen
资金
- National Natural Science Foundation of China [81322020, 81230032, 81171313]
- Program for New Century Excellent Talents in the University [NCET-12-0260]
Neuroinflammation is considered to be the pathogenesis of hepatic encephalopathy (HE), and imaging neuroinflammation is implicated in HE management. C-11-PK11195, a typical translocator protein (TSPO) radiotracer, is used for imaging neuroinflammation. However, it has inherent limitations, such as short half-life and limited availability. The purpose of this study was to demonstrate the efficiency of new generation TSPO radiotracer, F-18-DPA-714, in detecting and monitoring neuroinflammation of chronic HE. This study was divided into two parts. The first part compared F-18-DPA-714 and C-11-PK11195 radiotracers in ten HE induced rats [bile duct ligation (BDL) and fed hyperammonemic diet (HD)] and 6 control rats. The animal subjects underwent dynamic positron emission tomography (PET) during 2-day intervals. The C-11-PK11195 PET study showed no differences in whole brain average percent injected dose per gram (% ID/g) values at all time points (all P>0.05), while the F-18-DPA-714 PET study showed higher whole brain average % ID/g values in HE rats compared to control group rats at 900 s to 3300 s after injecting radiotracer (all P<0.05). The second part of the study evaluated the effectiveness of ibuprofen (IBU) treatment to chronic HE. Forty rats were classified into six groups, including Sham+normal saline (NS), Sham+IBU, BDL+NS, BDL+HD+ NS, BDL+IBU, and BDL+HD+ IBU groups. F-18-DPA-714 PET was used to image neuroinflammation. Whole and regional brain average % ID/g values, neurological features, inflammatory factors and activated microglia showed better in the IBU groups than in the NS groups (all P<0.05) and no difference was seen in the Sham groups compared to IBU groups (all P>0.05). In conclusion, this study demonstrated that F-18-DPA-714 is an ideal TPSO radiotracer for imaging neuroinflammation and monitoring anti-neuroinflammation treatment efficacy of chronic HE.
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