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Identification of Hypoxic Cells Using an Organotellurium Tag Compatible with Mass Cytometry
Author(s) -
Edgar Landon J.,
Vellanki Ravi N.,
Halupa Adrienne,
Hedley David,
Wouters Bradly G.,
Nitz Mark
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201405233
Subject(s) - mass cytometry , chemistry , reagent , combinatorial chemistry , flow cytometry , chelation , biophysics , computational biology , microbiology and biotechnology , biochemistry , biology , organic chemistry , gene , phenotype
Mass cytometry (MC) offers unparalleled potential for the development of highly parameterized assays for characterization of single cells within heterogeneous populations. Current reagents compatible with MC analysis employ antibody‐metal‐chelating polymer conjugates to report on the presence of biomarkers. Here, we expand the utility of MC by developing the first activity‐based probe designed specifically for use with the technology. A compact MC‐detectable telluroether is linked to a bioreductively sensitive 2‐nitroimidazole scaffold, thereby generating a probe sensitive to cellular hypoxia. The probe exhibits low toxicity and is able to selectively label O 2 ‐deprived cells. A proof‐of‐concept experiment employing metal‐bound DNA intercalators demonstrates that a heterogeneous mixture of cells with differential exposure to O 2 can be effectively discriminated by the quantity of tellurium‐labeling. The organotellurium reagents described herein provide a general approach to the development of a large toolkit of MC‐compatible probes for activity‐based profiling of single cells.