What question did this study set out to answer?

To determine whether in vivo DNP-MRI can visualize spatiotemporal redox dynamics and intrinsic metabolic activity of callus-forming skeletal progenitor cells during bone fracture healing.

August 16, 2026npj ImagingOpen Access

Evaluation of redox dynamics in callus-forming skeletal progenitor cells during fracture healing using in vivo DNP-MRI

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Authors

TKT. KuboKyoto Prefectural University STShohei TsujiGifu Pharmaceutical University YKYoshiaki KitauraThe University of Tokyo

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Implication

Preclinical imaging study demonstrates stage-dependent redox shifts in fractured mice, highlighting DNP-MRI as a functional tool for assessing early bone regeneration.

Key Points

To determine whether in vivo DNP-MRI can visualize spatiotemporal redox dynamics and intrinsic metabolic activity of callus-forming skeletal progenitor cells during bone fracture healing.
Monitored spatiotemporal redox changes in a mouse tibial fracture model using in vivo dynamic nuclear polarization magnetic resonance imaging (DNP-MRI) with the nitroxyl radical probe carbamoyl-PROXYL (CmP).
Conducted in vitro and ex vivo assays to compare CmP signal decay rates and mitochondrial ROS generation between callus-forming skeletal progenitor cells (CaSPCs) and intact bone-derived skeletal progenitor cells (IB-SPCs).
In vivo DNP-MRI detected accelerated, stage-dependent CmP signal decay in the fracture callus specifically during the early- and mid-phases of bone healing.
CaSPCs demonstrated significantly higher in vitro CmP signal decay rates and greater ex vivo mitochondrial ROS production than intact bone-derived progenitor cells.

Cite This Study

Kubo et al. (2026) studied this question.

synapsesocial.com/papers/6a8179dcf2fb91fc834ad535 https://doi.org/10.1038/s44303-026-00190-7

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Implication

Preclinical imaging study demonstrates stage-dependent redox shifts in fractured mice, highlighting DNP-MRI as a functional tool for assessing early bone regeneration.

Evaluation of redox dynamics in callus-forming skeletal progenitor cells during fracture healing using in vivo DNP-MRI

Discussion

Member takes

Implication

Key Points

Cite This Study

Evaluation of redox dynamics in callus-forming skeletal progenitor cells during fracture healing using in vivo DNP-MRI

Discussion

Member takes

Implication

Key Points

Cite This Study

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