| Autor: |
Guarin, David O., Joshi, Sameer M., Samoilenko, Anna, Kabir, Mohammad S. H., Hardy, Erin E., Takahashi, Atsush M., Ardenkjaer‐Larsen, Jan H., Chekmenev, Eduard Y., Yen, Yi‐Fen |
| Předmět: |
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| Zdroj: |
Angewandte Chemie; Aug2023, Vol. 135 Issue 31, p1-6, 6p |
| Abstrakt: |
We report dissolution Dynamic Nuclear Polarization (d‐DNP) of [15N3]metronidazole ([15N3]MNZ) for the first time. Metronidazole is a clinically approved antibiotic, which can be potentially employed as a hypoxia‐sensing molecular probe using 15N hyperpolarized (HP) nucleus. The DNP process is very efficient for [15N3]MNZ with an exponential build‐up constant of 13.8 min using trityl radical. After dissolution and sample transfer to a nearby 4.7 T Magnetic Resonance Imaging scanner, HP [15N3]MNZ lasted remarkably long with T1 values up to 343 s and 15N polarizations up to 6.4 %. A time series of HP [15N3]MNZ images was acquired in vitro using a steady state free precession sequence on the 15NO2 peak. The signal lasted over 13 min with notably long T2 of 20.5 s. HP [15N3]MNZ was injected in the tail vein of a healthy rat, and dynamic spectroscopy was performed over the rat brain. The in vivo HP 15N signals persisted over 70 s, demonstrating an unprecedented opportunity for in vivo studies. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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