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BF-168, a candidate probe for PET, is found to specifically recognize both neuritic and diffuse plaques, with a Ki of 6.4 nM for Aβ1-42.

BF-168, a styrylbenzoxazole derivative, is a potent agent that selectively recognizes SPs and NFTs in AD brain. BF-168 is a candidate probe for PET and is found to specifically recognize both neuritic and diffuse plaques, with a Ki of 6.4 nM for Aβ1-42[1].

Intravenous injection of BF-168 in PS1/APP and APP23 transgenic mice result in specific in vivo labeling to both compact and diffuse amyloid deposits in the brain. In addition, 18F-radiolabeled BF-168 demonstrates abundant initial brain uptake (3.9% injected dose/gm at 2 min after injection) and fast clearance (t1/2=24.7 min) after intravenous administration in normal mice. Furthermore, autoradiograms of brain sections from APP23 transgenic mice at 180 min after intravenous injection of [18F]BF-168 shows selective labeling of brain amyloid deposits with little nonspecific binding[1].

[1]. Okamura N, et al. Styrylbenzoxazole derivatives for in vivo imaging of amyloid plaques in the brain. J Neurosci. 2004 Mar 10;24(10):2535-41.

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