PIXSIC: A Wireless Intracerebral Radiosensitive Probe in Freely Moving Rats

Abstract : The aim of this study was to demonstrate the potential of a wireless pixelated β+-sensitive intracerebral probe (PIXSIC) for in vivo positron emission tomographic (PET) radiopharmacology in awake and freely moving rodents. The binding of [ 11 C]raclopride to D 2 dopamine receptors was measured in anesthetized and awake rats following injection of the radiotracer. Competitive binding was assessed with a cold raclopride injection 20 minutes later. The device can accurately monitor binding of PET ligands in freely moving rodents with a high spatiotemporal resolution. Reproducible time-activity curves were obtained for pixels throughout the striatum and cerebellum. A significantly lower [ 11 C]raclopride tracer–specific binding was observed in awake animals. These first results pave the way for PET tracer pharmacokinetics measurements in freely moving rodents.
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Laure Balasse, Julia Maerk, Frédéric Pain, Aurélie Genoux, Sylvain Fieux, et al.. PIXSIC: A Wireless Intracerebral Radiosensitive Probe in Freely Moving Rats. Molecular Imaging, Decker Publishing, 2015, 14 (484–489), ⟨10.2310/7290.2015.00020⟩. ⟨in2p3-01235714⟩

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