{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Fugger K"],"funding":["Francis Crick Institute","Cancer Research UK","European Research Council","The Francis Crick Institute","Medical Research Council","Wellcome Trust"],"pagination":["156-165"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC7610649"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["372(6538)"],"pubmed_abstract":["Mutations in the <i>BRCA1</i> or <i>BRCA2</i> tumor suppressor genes predispose individuals to breast and ovarian cancer. In the clinic, these cancers are treated with inhibitors that target poly(ADP-ribose) polymerase (PARP). We show that inhibition of DNPH1, a protein that eliminates cytotoxic nucleotide 5-hydroxymethyl-deoxyuridine (hmdU) monophosphate, potentiates the sensitivity of <i>BRCA</i>-deficient cells to PARP inhibitors (PARPi). Synthetic lethality was mediated by the action of SMUG1 glycosylase on genomic hmdU, leading to PARP trapping, replication fork collapse, DNA break formation, and apoptosis. <i>BRCA1</i>-deficient cells that acquired resistance to PARPi were resensitized by treatment with hmdU and DNPH1 inhibition. Because genomic hmdU is a key determinant of PARPi sen"],"journal":["Science (New York, N.Y.)"],"pubmed_title":["Targeting the nucleotide salvage factor DNPH1 sensitizes &lt;i&gt;BRCA&lt;/i&gt;-deficient cells to PARP inhibitors."],"pmcid":["PMC7610649"],"funding_grant_id":["104558/Z/14/Z","28990","10029","FC001212","666400","10178","10002","10012","10001","10048","10015","10212"],"pubmed_authors":["West SC","Taylor IA","Bajrami I","Silva Dos Santos M","MacRae J","Fugger K","Hewitt G","Boulton SJ","Carell T","Kelly G","Patel H","Kunzelmann S","Young SJ","Goldstone R"],"additional_accession":[]},"is_claimable":false,"name":"Targeting the nucleotide salvage factor DNPH1 sensitizes &lt;i&gt;BRCA&lt;/i&gt;-deficient cells to PARP inhibitors.","description":"Mutations in the <i>BRCA1</i> or <i>BRCA2</i> tumor suppressor genes predispose individuals to breast and ovarian cancer. In the clinic, these cancers are treated with inhibitors that target poly(ADP-ribose) polymerase (PARP). We show that inhibition of DNPH1, a protein that eliminates cytotoxic nucleotide 5-hydroxymethyl-deoxyuridine (hmdU) monophosphate, potentiates the sensitivity of <i>BRCA</i>-deficient cells to PARP inhibitors (PARPi). Synthetic lethality was mediated by the action of SMUG1 glycosylase on genomic hmdU, leading to PARP trapping, replication fork collapse, DNA break formation, and apoptosis. <i>BRCA1</i>-deficient cells that acquired resistance to PARPi were resensitized by treatment with hmdU and DNPH1 inhibition. Because genomic hmdU is a key determinant of PARPi sen","dates":{"release":"2021-01-01T00:00:00Z","publication":"2021 Apr","modification":"2026-05-09T08:34:40.6Z","creation":"2022-02-11T11:54:13.138Z"},"accession":"S-EPMC7610649","cross_references":{"pubmed":["33833118"],"doi":["10.1126/science.abb4542"]}}