Design and Automated Production of 11C-alpha-methyl-l-tryptophan (11C-AMT)

Overview

Journal Nucl Med Biol

Publisher Elsevier

Specialties Biology
Nuclear Medicine

Date 2016 May 7

PMID 27150033

Citations 6

Authors

Xuan Huang

Xia Xiao

Robert J Gillies

Haibin Tian

Affiliations

Soon will be listed here.

Abstract

(11)C-alpha-methyl-l-tryptophan ([(11)C]AMT), a tryptophan metabolism PET tracer, has successfully been employed for brain serotonin pathway and indoleamine 2,3-dioxygenase (IDO) pathway related tumor imaging. We here report a reliable, automated procedure for routine synthesis of [(11)C]AMT based on an Eckert and Ziegler Modular-Lab system. The semi-preparative HPLC was incorporated into the system to improve chemical purity and specific activity. The 6-step radiosynthesis followed by HPLC-purification provided [(11)C]AMT in 5.3±1.2% (n=6, non-decay-corrected) overall radiochemical yield with radiochemical purity >99% and specific activity of 35-116GBq/μmol. Usually, 2.95±0.65GBq (n=6, EOS) patient ready dose was produced from about 55.5GBq [(11)C]CO2 in 50min.

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