Abstract:
:Hypoxia imaging is important for diagnosis of ischemic diseases, and thus various (18)F-labeled radiopharmaceuticals have been developed. However, (18)F-labeling requires multistep procedures including azeotropic distillation, which is complicated and difficult to automate. Recently, (18)F-labeling method using Al-F complex in aqueous solution was devised that offered a straightforward (18)F-labeling procedure. We synthesized nitroimidazole derivatives conjugated with 1,4,7-triazacyclononane-1,4-diacetic acid (NODA) that can be labeled with (18)F using Al-F complex and examined their radiochemistries, in vitro and in vivo biological properties, and animal PET imaging characteristics. We found that the synthesized derivatives have excellent (18)F-labeling efficiencies, high stabilities, specific uptakes in cultured hypoxic tumor cells, and high tumor to nontumor ratios in xenografted mice. Furthermore, the derivatives were labeled with (18)F in a straightforward manner within 15 min at high labeling efficiencies and radiochemical purities. In conclusion, (18)F-labeled NODA-nitroimidazole conjugates were developed and proved to be promising hypoxia PET agents.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Hoigebazar L,Jeong JM,Lee JY,Shetty D,Yang BY,Lee YS,Lee DS,Chung JK,Lee MCdoi
10.1021/jm201611asubject
Has Abstractpub_date
2012-04-12 00:00:00pages
3155-62issue
7eissn
0022-2623issn
1520-4804journal_volume
55pub_type
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