Clinical research of drug-resistant gene detection combined with adenosine triphosphate-tumor chemosensitivity assay for guiding the second-line chemotherapy of lung squamous cell cancer

Objective To investigate the significance of resistant gene detection combined with adenosine triphosphate-tumor chemosensitivity assay (ATP-TCA) in the second-line chemotherapy of lung squamous cell cancer, and to provide a reference for clinical treatment. Methods 150 patients with lung squamous cell cancer diagnosed by histopathology or cytology and with the disease progressed after NP regime chemotherapy were enrolled. The mRNA expressions of excision repair cross complementation 1 (ERCC1) and ribonucleotide reductase M1 (RRM1) were detected by RT-PCR, and ATP-TCA was carried out. After detected by RT-PCR and ATP-TCA, the patients who were sensitive to gemcitabine plus cisplatin (GP) accepted the second-line systemic chemotherapy with GP regimen, and the others who were not sensitive to GP regimen or whose results of gene detection and ATP-TCA were on the contrary took the second-line chemotherapy regimens with docetaxel plus cisplatin (DP). Both groups accepted 2-4 cycles of systemic chemotherapy. The chest CT was followed up, and the response rate (RR), progression-free survival (PFS) and median survival time (MST) were investigated. Results The RR of GP group was 36.2 % (17/47), while the DP group was 28.1 % (26/92), and the difference was statistically significant (χ2 = 4.274, P 0.05). Conclusion The resistance gene detection combined with ATP-TCA have certain guiding significance on the second-line chemotherapy for advanced lung squamous cell cancer. Key words: Lung neoplasms; Carcinoma, squamous cell; Excision repair cross complementation 1; Ribonucleotide reductase M1; Adenosine triphosphate-tumor chemosensitivity assay; Second-line chemotherapy