Preliminary research on 1-(4-bromo-2-nitroimidazol-1-yl)-3-[ 18 F]fluoropropan-2-ol as a novel brain hypoxia PET tracer in a rodent model of stroke
摘要:
The synthesis of the new radiotracer precursor 4-Br-NITTP and the radiolabeling of the new tracer 1-(4-bromo-2-nitroimidazol-1-yl)-3-[F-18]fluoropropan-2-ol (4-Br-[F-18]FMISO) is reported. The cyclic voltammetry behaviour, neuronal cell toxicity, transport through the brain endothelial cell monolayer, in vivo PET imaging and preliminary calculations of the tracer uptake for a rodent model of stroke were studied for the new compound and the results were compared to those obtained with [F-18]FMISO, the current gold standard PET hypoxia tracer. The new PET brain hypoxia tracer is more easily reduced, has higher ClogP than [F-18]FMISO and it diffuses more rapidly through brain endothelial cells. The new compound is non-toxic to neuronal cells and it allows the in vivo mapping of stroke in mice with higher sensitivity. 4-Br-[F-18]FMISO is a good candidate for further development in ischemic stroke. (C) 2015 Elsevier Masson SAS. All rights reserved.
[EN] NITROIMIDAZOLE DERIVATIVES<br/>[FR] DÉRIVÉS DE NITROIMIDAZOLE
申请人:GE HEALTHCARE LTD
公开号:WO2011151320A1
公开(公告)日:2011-12-08
The present invention provides novel compounds useful in the treatment and diagnosis of mycobacterial infections. Compounds of the present invention have enhanced biological properties as compared to the related known compounds. The present invention also provides a precursor compound useful in the synthesis of certain compounds of the invention, and a method to obtain these compounds using said precursor compound. Methods of treatment and diagnosis in which the compounds of the invention find use are also provided.
A diagnostic agent for infectious diseases which is capable of distinguishing among different kinds of bacterial species and which allows simple and non-invasive measurement and/or imaging in a short period of time is provided; and a screening method for a therapeutic agent for infectious diseases caused by microorganisms are provided.
A diagnostic agent for infectious diseases caused by nitroimidazole susceptible microorganisms, containing an imidazole derivative or a fused imidazole derivative having at least one nitro group on an imidazole ring, or a labeled form thereof as an active ingredient is provided.
was suggested from a comparative study of in vitro radiosensitization in V79 cells that these lipophilic analogs may have reduction potentials close to those of fluoromisonidazole (FMISO) and misonidazole (MISO), known hypoxic cell radiosensitizers. The preparation of 18F-labeled FON (18FON) and FPN (18FPN) was achieved via two-steps through [18F]fluorideion displacement of tosylate precursors, in
[EN] COMPOUNDS AND METHODS FOR SELECTIVE IMAGING AND/OR ABLATION<br/>[FR] COMPOSÉS ET PROCÉDÉS POUR L'IMAGERIE ET/OU L'ABLATION SÉLECTIVES
申请人:AUCKLAND UNISERVICES LTD
公开号:WO2014007650A1
公开(公告)日:2014-01-09
The invention relates generally to compounds and methods for imaging and/or selective ablation of nitroreductase-expressing cells and/or biological agents. More particularly, although not exclusively, the invention provides compounds that are selectively metabolised by bacterial nitroreductases and are substantially insensitive to metabolism under oxic or hypoxic conditions by human nitroreductase enzymes.
Compounds And Methods For Selective Imaging And/Or Ablation
申请人:Auckland Uniservices Limited
公开号:US20150010474A1
公开(公告)日:2015-01-08
The invention relates generally to compounds and methods for imaging and/or selective ablation of nitroreductase-expressing cells and/or biological agents. More particularly, although not exclusively, the invention provides compounds that are selectively metabolised by bacterial nitroreductases and are substantially insensitive to metabolism under oxic or hypoxic conditions by human nitroreductase enzymes.