Purpose To investigate the relationship between the expression changes of insulin-like growth factor-binding protein(IGFBP) and the sensitivity of non-small cell lung cancer(NSCLC) patients to chemotherapy.Methods Fourty cases of patients with NSCLC were selected who undergone the first-line chemotherapy regiments.According to curative effect,all patients were divided into two groups including chemo-sensitive group and chemo-resistant group.IGFBPs(IGFBP-2,-3 and-5) levels in serum and tissue samples were de...