Thymidylate synthase gene amplification predicts pemetrexed resistance in patients with advanced non-small cell lung cancer
Clin. transl. oncol. (Print)
; 18(1): 107-112, ene. 2016. tab, ilus, graf
Artigo
em Inglês
| IBECS
| ID: ibc-148059
Biblioteca responsável:
ES1.1
Localização: BNCS
ABSTRACT
Background. Thymidylate synthase (TYMS) expression in lung cancer tissue affects the therapeutic efficacy of pemetrexed (PMT). TYMS protein expression is primarily assessed using immunohistochemistry (IHC), but this method is not suitable for accurate quantitative analysis. It is not known whether the analysis of TYMS gene copy number using fluorescence in situ hybridization (FISH) is a useful method for assessment of TYMS expression. Patients and methods. The participants were patients with chemo-naïve advanced NSCLC treated with PMT plus carboplatin (CBDCA) in prospective clinical phase II study. TYMS expression was evaluated in 40 patients by gene copy number and protein expression using FISH and IHC. Therapeutic efficacy was evaluated by investigating the response rate (RR), disease control rate (DCR), progression-free survival (PFS), and overall survival (OS). Results. TYMS gene amplification was detected in 8 patients (32 %) among 25 patients who could be evaluated for TYMS gene copy number. There were no patients with complete or partial response in the TYMS amplified group. RR and DCR were lower in the TYMS amplified group compared with the TYMS unamplified group (0 versus 35.3 %, p = 0.0539, 62.5 versus 94.1 %, p = 0.0443). PFS and OS were reduced in the TYMS amplified group. The analysis of TYMS gene copy number had higher sensitivity and specificity compared with TYMS protein expression (76.2 versus 50.0 %, 75.0 versus 66.7 %). Conclusion. The analysis of TYMS gene copy number is more suitable than TYMS protein expression for assessment of TYMS expression. TYMS gene amplification predicts outcome of patients receiving PMT with advanced NSCLC (AU)
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Bases de dados nacionais
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Espanha
Base de dados:
IBECS
Assunto principal:
Timidilato Sintase
/
Quimioterapia Adjuvante
/
Carcinoma Pulmonar de Células não Pequenas
/
Japão
Tipo de estudo:
Estudo diagnóstico
/
Estudo de avaliação
/
Estudo observacional
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Estudo prognóstico
/
Fatores de risco
Limite:
Feminino
/
Humanos
/
Masculino
País/Região como assunto:
Ásia
Idioma:
Inglês
Revista:
Clin. transl. oncol. (Print)
Ano de publicação:
2016
Tipo de documento:
Artigo
Instituição/País de afiliação:
Nihon University School of Medicine/Japan