Design of a Hyperpolarized Molecular Probe for Detection of Aminopeptidase N Activity

Ryunosuke Hata, Hiroshi Nonaka, Yoichi Takakusagi, Kazuhiro Ichikawa, Shinsuke Sando

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    15 Citations (Scopus)


    Aminopeptidase N (APN) is an important enzyme that is involved in tumor angiogenesis. Detection of APN activity can thus lead to early diagnosis and elucidation of tumor development. Although some molecular probes for APN have been developed, the detection of APN activity in opaque biological samples remains a challenge. To this end, we designed a hyperpolarized NMR probe [1-13C]Ala-NH2 which satisfies the prerequisites for APN detection, namely, sufficient retention of the hyperpolarized state, a high reactivity to APN, and an APN-induced chemical shift change. The [1-13C]Ala-NH2 probe allowed sensitive detection of APN activity using 13C NMR spectroscopy.

    Original languageEnglish
    Pages (from-to)1765-1768
    Number of pages4
    JournalAngewandte Chemie - International Edition
    Issue number5
    Publication statusPublished - Jan 26 2016


    All Science Journal Classification (ASJC) codes

    • Catalysis
    • Chemistry(all)

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