Abstract:
:(68)Ga PET imaging in clinical oncology represents a notable development because the availability of (68)Ga is not dependent on a cyclotron. Furthermore, labeled amino acid derivatives have been proven to be useful for the imaging many tumor types. In the present study, we synthesized β-aminoalanine, γ-aminohomoalanine, and lysine conjugates of macrocyclic bifunctional chelating agents, such as, NOTA (1a-c) and DOTA (2a-c). The compounds produced were found to be potential useful as (68)Ga-PET imaging agents. In particular, they showed high tumor uptakes in vitro and in vivo, and had high labeling yields and excellent stabilities. The co-ordination chemistry of NOTA-monoamide compound 1a was studied by multinuclear NMR. In vitro studies showed that the synthesized compounds were taken up by cancer cells more than controls ((68)Ga-NOTA and (68)Ga-DOTA). Furthermore, in vivo studies showed that they have high tumor to muscle and tumor to blood ratios, and small-animal PET imaging revealed high tumor uptakes as compared with other organs, and high bladder activities, indicating rapid renal excretion. These results might motivate the use of (68)Ga amino acid PET for tumor diagnosis.
journal_name
Bioorg Med Chemjournal_title
Bioorganic & medicinal chemistryauthors
Shetty D,Jeong JM,Ju CH,Kim YJ,Lee JY,Lee YS,Lee DS,Chung JK,Lee MCdoi
10.1016/j.bmc.2010.09.022subject
Has Abstractpub_date
2010-11-01 00:00:00pages
7338-47issue
21eissn
0968-0896issn
1464-3391pii
S0968-0896(10)00849-7journal_volume
18pub_type
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