title: A DNA repair pathway score predicts survival in human multiple myeloma: the potential for therapeutic strategy.
abstract: DNA repair is critical to resolve extrinsic or intrinsic DNA damage to ensure regulated gene transcription and DNA replication. These pathways control repair of double strand breaks, interstrand crosslinks, and nucleotide lesions occurring on single strands. Distinct DNA repair pathways are highly inter-linked for the fast and optimal DNA repair. A deregulation of DNA repair pathways may maintain and promote genetic instability and drug resistance to genotoxic agents in tumor cells by specific mechanisms that tolerate or rapidly bypass lesions to drive proliferation and abrogate cell death. Multiple Myeloma (MM) is a plasma cell disorder characterized by genetic instability and poor outcome for some patients, in which the compendium of DNA repair pathways has as yet not been assessed for a disease-specific prognostic relevance. We design a DNA repair risk score based on the expression of genes coding for proteins involved in DNA repair in MM cells. From a consensus list of 84 DNA repair genes, 17 had a bad prognostic value and 5 a good prognostic value for both event-free and overall survival of previously-untreated MM patients. The prognostic information provided by these 22 prognostic genes was summed within a global DNA repair score (DRScore) to take into account the tight linkage of repair pathways. DRscore was strongly predictive for both patients' event free and overall survivals. Also, DRscore has the potential to identify MM patients whose tumor cells are dependent on specific DNA repair pathways to design treatments that induce synthetic lethality by exploiting addiction to deregulated DNA repair pathways.
authors.affiliation: CHU Montpellier, Institute of Research in Biotherapy, Montpellier, F-34295 FRANCE.
authors.forename: Alboukadel
authors.initials: A
authors.lastname: Kassambara
authors.forename: Claire
authors.initials: C
authors.lastname: Gourzones-Dmitriev
authors.forename: Surinder
authors.initials: S
authors.lastname: Sahota
authors.forename: Thierry
authors.initials: T
authors.lastname: Rème
authors.forename: Jérôme
authors.initials: J
authors.lastname: Moreaux
authors.forename: Hartmut
authors.initials: H
authors.lastname: Goldschmidt
authors.forename: Angelos
authors.initials: A
authors.lastname: Constantinou
authors.forename: Philippe
authors.initials: P
authors.lastname: Pasero
authors.forename: Dirk
authors.initials: D
authors.lastname: Hose
authors.forename: Bernard
authors.initials: B
authors.lastname: Klein
mesh_terms: D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis*; D019295:Computational Biology; D004249:DNA Damage / Q000235:genetics; D004260:DNA Repair / Q000235:genetics*; D045643:DNA Repair Enzymes / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male; D009101:Multiple Myeloma / Q000235:genetics* / Q000401:mortality* / Q000628:therapy; D011237:Predictive Value of Tests; D015398:Signal Transduction; D015996:Survival Rate
chemical_list: D014408:Biomarkers, Tumor; D045643:DNA Repair Enzymes