dc.creatorCarbajosa González, Sofía
dc.creatorPansa, Maria Florencia
dc.creatorPaviolo, Natalia Soledad
dc.creatorCastellaro, Andrés Marcos
dc.creatorAndino, Diego Leonardo
dc.creatorNigra, Ayelén Denise
dc.creatorGarcía, Iris Alejandra
dc.creatorRacca, Ana Cristina
dc.creatorRodriguez, María Celeste
dc.creatorAngiolini, Virginia Andrea
dc.creatorGuantay, Maria Laura
dc.creatorVillafañez, Florencia
dc.creatorFederico, Maria Belén
dc.creatorRodríguez, Lucía
dc.creatorCaputto, Beatriz Leonor
dc.creatorDrewes, Gerard
dc.creatorMadauss, Kevin P.
dc.creatorGloger, Israel
dc.creatorFernandez, Elmer Andres
dc.creatorGil, German Alejandro
dc.creatorBocco, Jose Luis
dc.creatorGottifredi, Vanesa
dc.creatorSoria, Ramiro Gaston
dc.date.accessioned2021-04-15T03:24:30Z
dc.date.accessioned2022-10-15T08:19:48Z
dc.date.available2021-04-15T03:24:30Z
dc.date.available2022-10-15T08:19:48Z
dc.date.created2021-04-15T03:24:30Z
dc.date.issued2019-03
dc.identifierCarbajosa González, Sofía; Pansa, Maria Florencia; Paviolo, Natalia Soledad; Castellaro, Andrés Marcos; Andino, Diego Leonardo; et al.; Polo-like kinase 1 inhibition as a therapeutic approach to selectively target BRCA1-deficient cancer cells by synthetic lethality induction; American Association for Cancer Research; Clinical Cancer Research; 25; 13; 3-2019; 4049-4062
dc.identifier1078-0432
dc.identifierhttp://hdl.handle.net/11336/130078
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4364387
dc.description.abstractPurpose: BRCA1 and BRCA2 deficiencies are widespread drivers of human cancers that await the development of targeted therapies. We aimed to identify novel synthetic lethal relationships with therapeutic potential using BRCA-deficient isogenic backgrounds. Experimental Design: We developed a phenotypic screening technology to simultaneously search for synthetic lethal (SL) interactions in BRCA1- and BRCA2-deficient contexts. For validation, we developed chimeric spheroids and a dualtumor xenograft model that allowed the confirmation of SL induction with the concomitant evaluation of undesired cytotoxicity on BRCA-proficient cells. To extend our results using clinical data, we performed retrospective analysis on The Cancer Genome Atlas (TCGA) breast cancer database. Results: The screening of a kinase inhibitors library revealed that Polo-like kinase 1 (PLK1) inhibition triggers strong SL induction in BRCA1-deficient cells. Mechanistically, we found no connection between the SL induced by PLK1 inhibition and PARP inhibitors. Instead, we uncovered that BRCA1 downregulation and PLK1 inhibition lead to aberrant mitotic phenotypes with altered centrosomal duplication and cytokinesis, which severely reduced the clonogenic potential of these cells. The penetrance of PLK1/BRCA1 SL interaction was validated using several isogenic and nonisogenic cellular models, chimeric spheroids, and mice xenografts. Moreover, bioinformatic analysis revealed high-PLK1 expression in BRCA1-deficient tumors, a phenotype that was consistently recapitulated by inducing BRCA1 deficiency in multiple cell lines as well as in BRCA1-mutant cells. Conclusions: We uncovered an unforeseen addiction of BRCA1-deficient cancer cells to PLK1 expression, which provides a new means to exploit the therapeutic potential of PLK1 inhibitors in clinical trials, by generating stratification schemes that consider this molecular trait in patient cohorts.
dc.languageeng
dc.publisherAmerican Association for Cancer Research
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://clincancerres.aacrjournals.org/content/25/13/4049
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1158/1078-0432.CCR-18-3516
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectletalidad sintetica
dc.subjectexpresion de genes
dc.subjectcancer
dc.titlePolo-like kinase 1 inhibition as a therapeutic approach to selectively target BRCA1-deficient cancer cells by synthetic lethality induction
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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