863918-78-9

Methoxy-X04 is a brain-permeable fluorescent probe for amyloid-β (Aβ) to detect and quantify plaques, tangles, and cerebrovascular amyloid. It displays high in vitro binding affinity (K_i = 26.8 nM) for fibrillar β-sheet deposits and is used to image Aβ plaques in the brains of living APP/PS1 mice, a transgenic model of familial Alzheimer''s disease. For in vivo imaging, APP/PS1 mice were injected with methoxy-X04 at a dose of 10 mg/kg, i.p., 24 hours prior to two-photon imaging. Methoxy-X04 displays an excitation peak at 750 nm with emission between 460 and 500 nm.

Methoxy-X04 is a small molecule Aβ-binding agent, which exhibits anti-amyloid effects.

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[2] STEFFEN BURGOLD. In vivo multiphoton imaging reveals gradual growth of newborn amyloid plaques over weeks[J]. Acta Neuropathologica, 2010, 121 3: 327-335. DOI: 10.1007/s00401-010-0787-6