A nonpeptidic cathepsin S activity-based probe for noninvasive optical imaging of tumor-associated macrophages.

A nonpeptidic cathepsin S activity-based probe for noninvasive optical imaging of tumor-associated macrophages.
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DOI:
10.1016/j.chembiol.2012.03.012
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发表时间:
2012-05-25
影响因子:
--
通讯作者:
Bogyo M
Bogyo M
中科院分区:
生物1区
文献类型:
--
作者:
Verdoes M;Edgington LE;Scheeren FA;Leyva M;Blum G;Weiskopf K;Bachmann MH;Ellman JA;Bogyo M

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Macrophage infiltration into tumors has been correlated with poor clinical outcome in multiple cancer types. Therefore, new tools to image tumor-associated macrophages could be valuable for diagnosis and prognosis of cancer. Herein we describe the synthesis and characterization of a cathepsin S-directed, quenched activity-based probe (qABP), BMV083. This probe makes use of an optimized non-peptidic scaffold leading to enhanced in vivo properties relative to previously reported peptide-based probes. In a syngeneic breast cancer model, BMV083 provides high tumor specific fluorescence that can be visualized using noninvasive optical imaging methods. Furthermore, analysis of probe labeled cells demonstrates that the probe primarily targets macrophages with an M2 phenotype. Thus, BMV083 is a potential valuable new in vivo reporter for tumor-associated macrophages that could greatly facilitate the future studies of macrophage function in the process of tumorigenesis.
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