Real-Time in Vivo Detection of H2O2 Using Hyperpolarized 13C-Thiourea

Arif Wibowo, Jae Mo Park, Shie Chau Liu, Chaitan Khosla, Daniel M. Spielman

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Reactive oxygen species (ROS) are essential cellular metabolites widely implicated in many diseases including cancer, inflammation, and cardiovascular and neurodegenerative disorders. Yet, ROS signaling remains poorly understood, and their measurements are a challenge due to high reactivity and instability. Here, we report the development of 13C-thiourea as a probe to detect and measure H2O2 dynamics with high sensitivity and spatiotemporal resolution using hyperpolarized 13C magnetic resonance spectroscopic imaging. In particular, we show 13C-thiourea to be highly polarizable and to possess a long spin-lattice relaxation time (T1), which enables real-time monitoring of ROS-mediated transformation. We also demonstrate that 13C-thiourea reacts readily with H2O2 to give chemically distinguishable products in vitro and validate their detection in vivo in a mouse liver. This study suggests that 13C-thiourea is a promising agent for noninvasive detection of H2O2 in vivo. More broadly, our findings outline a viable clinical application for H2O2 detection in patients with a range of diseases.

Original languageEnglish (US)
Pages (from-to)1737-1742
Number of pages6
JournalACS chemical biology
Volume12
Issue number7
DOIs
StatePublished - Jul 21 2017

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine

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