COMPARATIVE STUDY
JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL

Gefitinib in combination with gemcitabine and cisplatin in advanced non-small-cell lung cancer: a phase III trial—INTACT 1

Giuseppe Giaccone, Roy S Herbst, Christian Manegold, Giorgio Scagliotti, Rafael Rosell, Vincent Miller, Ronald B Natale, Joan H Schiller, Joachim Von Pawel, Anna Pluzanska, Ulrich Gatzemeier, John Grous, Judith S Ochs, Steven D Averbuch, Michael K Wolf, Pamela Rennie, Abderrahim Fandi, David H Johnson
Journal of Clinical Oncology 2004 March 1, 22 (5): 777-84
14990632

PURPOSE: The purpose of this study was to determine whether the addition of the epidermal growth factor receptor tyrosine kinase inhibitor gefitinib (Iressa, ZD1839; AstraZeneca, Wilmington, DE) to standard first-line gemcitabine and cisplatin provides clinical benefit over gemcitabine and cisplatin alone in patients with advanced or metastatic non-small-cell lung cancer (NSCLC). Gefitinib has demonstrated encouraging efficacy in advanced NSCLC in phase II trials in pretreated patients, and a phase I trial of gefitinib in combination with gemcitabine and cisplatin showed favorable tolerability.

PATIENTS AND METHODS: This was a phase III randomized, double-blind, placebo-controlled, multicenter trial in chemotherapy-naive patients with unresectable stage III or IV NSCLC. All patients received up to six cycles of chemotherapy (cisplatin 80 mg/m(2) on day 1 and gemcitabine 1,250 mg/m(2) on days 1 and 8 of the 3-week cycle) plus either gefitinib 500 mg/d, gefitinib 250 mg/d, or placebo. Daily gefitinib or placebo was continued until disease progression. End points included overall survival (primary), time to progression, response rates, and safety evaluation.

RESULTS: A total of 1,093 patients were enrolled. There was no difference in efficacy end points between the treatment groups: for the gefitinib 500 mg/d, gefitinib 250 mg/d, and placebo groups, respectively, median survival times were 9.9, 9.9, and 10.9 months (global ordered log-rank [GOLrank] P =.4560), median times to progression were 5.5, 5.8, and 6.0 months (GOLrank; P =.7633), and response rates were 49.7%, 50.3%, and 44.8%. No significant unexpected adverse events were seen.

CONCLUSION: Gefitinib in combination with gemcitabine and cisplatin in chemotherapy-naive patients with advanced NSCLC did not have improved efficacy over gemcitabine and cisplatin alone. The reasons for this remain obscure and require further preclinical testing.

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