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Nicotine acetylcholine receptors (nAChRs) are associated with resistance to gemcitabine, cisplatin and paclitaxel in non-small-cell lung cancer (NSCLC) cell lines. Three single nucleotide polymorphisms (SNPs) of CHRNA3, CHRNA5 and LOC123688 increase lung cancer risk. These SNPs may have influenced outcome in patients treated in our phase III trial. Stage IV NSCLC patients were treated with customized chemotherapy based on ERCC1 (excision repair cross-complementing 1) mRNA expression. Patients in the control arm received docetaxel/cisplatin; patients in the genotypic arm with low levels of ERCC1 received docetaxel/cisplatin; patients in the genotypic arm with high levels of ERCC1 received docetaxel/gemcitabine. DNA was extracted from lymphocytes, and CHRNA3 (rs1051730), CHRNA5 (rs16969968) and LOC123688 (rs8034191) SNPs were genotyped with the Taqman allele discrimination assay. A significant interaction was found for CHRNA3 and PS (P=0.02). In patients with PS 0, CT patients had a better response than both CC (P=0.01) and TT (P=0.02) patients, and patients in the low genotypic group also had a better response (P=0.01). When the CHRNA3 genotype was added in the multivariate analysis for progression-free survival, an improvement was observed in the low genotypic group in PS 0 patients (P=0.02). PS 0 patients in the low genotypic group with the CT genotype attained an 84% response rate, 12.1-month progression-free survival, and 19-month median survival. CHRNA3 (rs1051730) genotyping can improve customized chemotherapy based on tumor assessment of ERCC1 mRNA in stage IV NSCLC with PS 0.

Original publication

DOI

10.1016/j.lungcan.2009.08.004

Type

Journal article

Journal

Lung cancer (Amsterdam, Netherlands)

Publication Date

06/2010

Volume

68

Pages

491 - 497

Addresses

Catalan Institute of Oncology, Badalona, Spain.

Keywords

Humans, Carcinoma, Non-Small-Cell Lung, Lung Neoplasms, Cisplatin, Taxoids, Endonucleases, DNA-Binding Proteins, Receptors, Nicotinic, Deoxycytidine, Neoplasm Staging, Drug Therapy, Combination, Survival Analysis, Drug Resistance, Neoplasm, Polymorphism, Single Nucleotide, Adult, Aged, Aged, 80 and over, Middle Aged, Female, Male, Precision Medicine, Docetaxel