Add time:08/04/2019 Source:sciencedirect.com
The blood–brain barrier permeability of ginkgolide B was examined using positron emission tomography (PET) probes of a 18F-incorporated ginkgolide B ([18F]-2) and a 11C-incorporated methylbenzyl-substituted ginkgolide B ([11C]-3). PET studies in monkeys showed low uptake of [18F]-2 into the brain, but small amounts of [11C]-3 were accumulated in the parenchyma. Furthermore, when cyclosporine A was preadministered to rats, the accumulation of [18F]-2 in the rat brain did not significantly change, however, the accumulation of [11C]-3 was five times higher than that in the control rat. These results provide effective approaches for investigating the drug potential of ginkgolides.
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