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MitoNeoD: a mitochondria-targeted superoxide probe

  • Maria M. Shchepinova
  • , Andrew G. Cairns
  • , Tracy A. Prime
  • , Angela Logan
  • , Andrew M. James
  • , Andrew R. Hall
  • , Sara Vidoni
  • , Sabine Arndt
  • , Stuart T. Caldwell
  • , Hiran A. Prag
  • , Victoria R. Pell
  • , Thomas Krieg
  • , John F. Mulvey
  • , Pooja Yadav
  • , James N. Cobley
  • , Thomas P. Bright
  • , Hans M. Senn
  • , Robert F. Anderson
  • , Michael P. Murphy*
  • , Richard C. Hartley*
  • *Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    183 Downloads (Pure)

    Abstract

    Mitochondrial superoxide (O2⋅−) underlies much oxidative damage and redox signaling. Fluorescent probes can detect O2⋅−, but are of limited applicability in vivo, while in cells their usefulness is constrained by side reactions and DNA intercalation. To overcome these limitations, we developed a dual-purpose mitochondrial O2⋅− probe, MitoNeoD, which can assess O2⋅− changes in vivo by mass spectrometry and in vitro by fluorescence. MitoNeoD comprises a O2⋅−-sensitive reduced phenanthridinium moiety modified to prevent DNA intercalation, as well as a carbon-deuterium bond to enhance its selectivity for O2⋅− over non-specific oxidation, and a triphenylphosphonium lipophilic cation moiety leading to the rapid accumulation within mitochondria. We demonstrated that MitoNeoD was a versatile and robust probe to assess changes in mitochondrial O2⋅− from isolated mitochondria to animal models, thus offering a way to examine the many roles of mitochondrial O2⋅−production in health and disease.
    Original languageEnglish
    Pages (from-to)1285–1298.e12
    Number of pages27
    JournalCell Chemical Biology
    Volume24
    Issue number10
    Early online date7 Sept 2017
    DOIs
    Publication statusPublished - 19 Oct 2017

    Keywords

    • Mitochondria
    • Superoxide
    • ROS measurement
    • Mitochondria-targeting
    • Triphenylphosphonium
    • MitoSOX
    • Hydroethidine
    • Exomarker

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