Published in:
01-04-2016 | Research Article
P-Glycoprotein, not BCRP, Limits the Brain Uptake of [18F]Mefway in Rodent Brain
Authors:
Jae Yong Choi, Jin Sook Song, Minkyung Lee, Woon-Ki Cho, Jin Chung, Chul Hyoung Lyoo, Chul Hoon Kim, Jiae Park, Kyo Chul Lee, Kyeong Min Kim, Jee Hae Kang, Myung Ae Bae, Young Hoon Ryu
Published in:
Molecular Imaging and Biology
|
Issue 2/2016
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Abstract
Purpose
The aim of this study was to determine whether the brain uptake of [18F]Mefway is influenced by the action of P-glycoprotein (P-gp) and breast cancer resistance protein (Bcrp) in rodents.
Procedures
[18F]Mefway was applied to rats pharmacologically inhibited with tariquidar (TQD) and to genetically disrupted mice.
Results
Pretreatment of TQD results in 160 % higher hippocampal uptake compared with control rats. In genetically disrupted mice, a maximal brain uptake value of 3.2 SUV in the triple knockout mice (tKO, Mdr1a/b(−/−)Bcrp1(−/−)) was comparable to that of the double knockout mice (dKO, Mdr1a/b(−/−)) and 2-fold those of the wild-type and Bcrp1(−/−) knockout mice. The differences of binding values were statistically insignificant between control and experimental groups. The brain-to-plasma ratios for tKO mice were also two to five times higher than those for other groups.
Conclusions
[18F]Mefway is modulated by P-gp, and not by Bcrp in rodents.