Mutation abundance affects the efficacy of EGFR tyrosine kinase inhibitor readministration in non-small-cell lung cancer with acquired resistance.
Med Oncol
; 31(1): 810, 2014 Jan.
Article
en En
| MEDLINE
| ID: mdl-24338271
There is no consensus in the salvage treatment for non-small-cell lung cancer (NSCLC) with acquired resistance to primary epidermal growth factor receptor-tyrosine kinase inhibitors (EGFR-TKIs). Fifty-one consecutive EGFR-mutated NSCLC patients with TKI retreatment after acquired resistance were enrolled in this study. The quantitation of mutation abundance was performed by real-time fluorescent quantitative PCR. The correlation between mutation abundance and outcomes of readministrated TKI was analyzed by survival analysis. Patients with high (H) mutation abundance (24/51) had a significantly (log-rank, P < 0.05) longer (5.27-2.53 months) median progression-free survival (PFS), compared with the low (L) abundance group (27/51), whereas the median overall survival showed no difference (21.00-18.20 months, log-rank P = .403) between the two groups. Objective response and disease control rates in group H and group L regarding the second round TKI treatment were 8.3, 70.8 and 0, 48.1 %, respectively. Groupings with different mutation abundances were significantly associated with PFS under multivariate Cox proportional hazards regression model [hazard ratio (HR) for group H vs. L, 0.527; P = .036]. Mutation abundance affects the efficacy of EGFR-TKIs readministration in NSCLC with acquired resistance. The quantitative mutation abundance of EGFR may be a potential predictor for selecting optimal patients to readministrate EGFR-TKIs after acquired resistance to primary TKI.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Carcinoma de Pulmón de Células no Pequeñas
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Resistencia a Antineoplásicos
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Inhibidores de Proteínas Quinasas
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Receptores ErbB
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Neoplasias Pulmonares
Tipo de estudio:
Diagnostic_studies
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Observational_studies
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Prognostic_studies
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Risk_factors_studies
Límite:
Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Med Oncol
Asunto de la revista:
NEOPLASIAS
Año:
2014
Tipo del documento:
Article
País de afiliación:
China
Pais de publicación:
Estados Unidos