Volume 54, Issue 45 pp. 13444-13447
Communication

Supramolecular Assays for Mapping Enzyme Activity by Displacement-Triggered Change in Hyperpolarized 129Xe Magnetization Transfer NMR Spectroscopy

Dr. Matthias Schnurr

Dr. Matthias Schnurr

ERC Project BiosensorImaging, Leibniz-Institut für Molekulare Pharmakologie (FMP), Campus BerlinBuch, Robert-Rössle-Strasse 10, 13125 Berlin (Germany)

These authors contributed equally to this work.

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Dipl.-Chem. Jagoda Sloniec-Myszk

Dipl.-Chem. Jagoda Sloniec-Myszk

BAM Bundesanstalt für Materialforschung und -prüfung, Richard-Willstätter-Strasse 11, 12489 Berlin (Germany)

These authors contributed equally to this work.

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Dr. Jörg Döpfert

Dr. Jörg Döpfert

ERC Project BiosensorImaging, Leibniz-Institut für Molekulare Pharmakologie (FMP), Campus BerlinBuch, Robert-Rössle-Strasse 10, 13125 Berlin (Germany)

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Dr. Leif Schröder

Corresponding Author

Dr. Leif Schröder

ERC Project BiosensorImaging, Leibniz-Institut für Molekulare Pharmakologie (FMP), Campus BerlinBuch, Robert-Rössle-Strasse 10, 13125 Berlin (Germany)

Leif Schröder, ERC Project BiosensorImaging, Leibniz-Institut für Molekulare Pharmakologie (FMP), Campus BerlinBuch, Robert-Rössle-Strasse 10, 13125 Berlin (Germany)

Andreas Hennig, Department of Life Sciences and Chemistry, Jacobs University Bremen, Campus Ring 1, 28759 Bremen (Germany)

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Dr. Andreas Hennig

Corresponding Author

Dr. Andreas Hennig

Department of Life Sciences and Chemistry, Jacobs University Bremen, Campus Ring 1, 28759 Bremen (Germany)

These authors contributed equally to this work.

Leif Schröder, ERC Project BiosensorImaging, Leibniz-Institut für Molekulare Pharmakologie (FMP), Campus BerlinBuch, Robert-Rössle-Strasse 10, 13125 Berlin (Germany)

Andreas Hennig, Department of Life Sciences and Chemistry, Jacobs University Bremen, Campus Ring 1, 28759 Bremen (Germany)

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First published: 01 October 2015
Citations: 58

Graphical Abstract

The supramolecular recognition properties of cucurbiturils are exploited in a modified signal-transfer approach in Xe NMR spectroscopy. Magnetic resonance imaging of enzymatic reactions was possible in this way by displacement of hyperpolarized 129Xe.

Abstract

Reversibly bound Xe is a sensitive NMR and MRI reporter with its resonance frequency being influenced by the chemical environment of the host. Molecular imaging of enzyme activity presents a promising approach for disease identification, but current Xe biosensing concepts are limited since substrate conversion typically has little impact on the chemical shift of Xe inside tailored cavities. Herein, we exploit the ability of the product of the enzymatic reaction to bind itself to the macrocyclic hosts CB6 and CB7 and thereby displace Xe. We demonstrate the suitability of this method to map areas of enzyme activity through changes in magnetization transfer with hyperpolarized Xe under different saturation scenarios.

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