An assay to measure poly(ADP ribose) glycohydrolase (PARG) activity in cells

Dominic I James, Stephen Durant, Kay Eckersley, Emma Fairweather, Louise A Griffiths, Nicola Hamilton, Paul Kelly, Mark O'Connor, Kerry Shea, Ian D Waddell, Donald J Ogilvie

Research output: Contribution to journalArticlepeer-review

Abstract

After a DNA damage signal multiple polymers of ADP ribose attached to poly(ADP) ribose (PAR) polymerases (PARPs) are broken down by the enzyme poly(ADP) ribose glycohydrolase (PARG). Inhibition of PARG leads to a failure of DNA repair and small molecule inhibition of PARG has been a goal for many years. To determine whether biochemical inhibitors of PARG are active in cells we have designed an immunofluorescence assay to detect nuclear PAR after DNA damage. This 384-well assay is suitable for medium throughput high-content screening and can detect cell-permeable inhibitors of PARG from nM to µM potency. In addition, the assay has been shown to work in murine cells and in a variety of human cancer cells. Furthermore, the assay is suitable for detecting the DNA damage response induced by treatment with temozolomide and methylmethane sulfonate (MMS). Lastly, the assay has been shown to be robust over a period of several years.

Original languageEnglish
Pages (from-to)736
JournalF1000Research
Volume5
Issue number736
DOIs
Publication statusPublished - 25 Apr 2016

Keywords

  • PARG,

Research Beacons, Institutes and Platforms

  • Manchester Cancer Research Centre

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