Identification of mutations associated with acquired resistance to sunitinib in renal cell cancer.
Int J Cancer
; 145(7): 1991-2001, 2019 10 01.
Article
en En
| MEDLINE
| ID: mdl-30848481
Sunitinib is one of the most widely used targeted therapeutics for renal cell carcinoma (RCC), but acquired resistance against targeted therapies remains a major clinical challenge. To dissect mechanisms of acquired resistance and unravel reliable predictive biomarkers for sunitinib in RCC, we sequenced the exons of 409 tumor-suppressor genes and oncogenes in paired tumor samples from an RCC patient, obtained at baseline and after development of acquired resistance to sunitinib. From newly arising mutations, we selected, using in silico prediction models, six predicted to be deleterious, located in G6PD, LRP1B, SETD2, TET2, SYNE1, and DCC. Consistently, immunoblotting analysis of lysates derived from sunitinib-desensitized RCC cells and their parental counterparts showed marked differences in the levels and expression pattern of the proteins encoded by these genes. Our further analysis demonstrates essential roles for these proteins in mediating sunitinib cytotoxicity and shows that their loss of function renders tumor cells resistant to sunitinib in vitro and in vivo. Finally, sunitinib resistance induced by continuous exposure or by inhibition of the six proteins was overcome by treatment with cabozantinib or a low-dose combination of lenvatinib and everolimus. Collectively, our results unravel novel markers of acquired resistance to sunitinib and clinically relevant approaches for overcoming this resistance in RCC.
Palabras clave
DCC; G6PD; LRP1B; SETD2; SYNE1; TET2; MCL-1; biomarkers; mTORC1; renal cell carcinoma; resistance; sunitinib
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Carcinoma de Células Renales
/
Biomarcadores de Tumor
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Resistencia a Antineoplásicos
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Neoplasias Renales
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Mutación
Tipo de estudio:
Diagnostic_studies
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Prognostic_studies
/
Risk_factors_studies
Límite:
Animals
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Female
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Humans
Idioma:
En
Revista:
Int J Cancer
Año:
2019
Tipo del documento:
Article
País de afiliación:
Italia
Pais de publicación:
Estados Unidos