Details

Autor(en) / Beteiligte

• Fathers, Catherine
• Drayton, Ross M.
• Solovieva, Svetlana
• Bryant, Helen E.

Titel

Inhibition of poly(ADP-ribose) glycohydrolase (PARG) specifically kills BRCA2-deficient tumor cells

Ist Teil von

• Cell cycle (Georgetown, Tex.), 2012-03, Vol.11 (5), p.990-997

Ort / Verlag

United States: Taylor & Francis

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Taylor & Francis Journals Auto-Holdings Collection

Beschreibungen/Notizen

• Poly(ADP-ribose) glycohydrolase (PARG), removes poly(ADP-ribose) subunits from proteins that have previously been modified by poly(ADP-ribose) polymerse. This ensures that modification is transient, and it is suggested that removal of poly(ADP-ribose) is essential for some types of DNA repair. Here we show increased γH2AX foci formation and increased homologous recombination when PARG is inhibited. These effects are reduced when replication is inhibited, suggesting that in the absence of PARG activity, replication forks collapse, and homologous recombination is induced for repair. Consistent with this, we show that cells deficient in the homologous recombination protein BRCA2 are sensitive to PARG depletion or inhibition. These data raise the exciting possibility that PARG inhibitors may be used to specifically kill BRCA2 and other homologous recombination-deficient tumors.