C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/283, 167/48,
C07D 211/90 (2006.01) C07D 213/53 (2006.01) C07D 213/82 (2006.01) C07D 277/04 (2006.01) C07D 285/00 (2006.01) C07F 13/00 (2006.01) C07F 15/00 (2006.01) C07K 5/06 (2006.01) G01N 33/60 (2006.01)
Patent
CA 1266864
Abstract of the Disclosure A dihydropyridine?pyridinium salt type of redox, or chemical, delivery system for the site- specific and/or site-enhanced delivery of a radio- nuclide to the brain is provided. A chelating agent capable of chelating with a radionuclide and having a primary, secondary or tertiary amino function can be converted to the corresponding analogue in which said function is replaced with a dihydropyri- dine?pyridinium salt redox system and then complexed with a radionuclide to provide a new radiopharmaceutical that, in its lipoidal dihydropyridine form, penetrates the blood-brain barrier ("BBB") and allows increased levels of radionuclide concentration in the brain, particularly since oxidation of the dihydropyridine moiety in vivo to the ionic pyridinium salt retards elimination from the brain while elimination from the general circulation is accelerated. This radionuclide delivery system is well suited for use in scintigraphy and similar radiographic techniques.
487166
Swabey Ogilvy Renault
University Of Florida
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