Research Project
Grant-in-Aid for Scientific Research (B)
This study was a randomized trial to evaluate the survival benefit of gefitinib, a epidermal growth factor receptor (EGFR) tylosine kinase inhibitor as a maintenance therapy in advanced non-small cell lung cancer (NSCLC). Between March 2003 and July 2005, 604 patients with stage IIIB or IV NSCLC were randomly assigned to receive standard chemotherapy alone or 3 cycles of chemotherapy followed by gefitinib until disease progressin. We carried out a correlative study to determine the relationships between EGFR mutations, EGFR or HER2 protein expressions, their activation status (pEGFR, pHER2) or insulin-like growth factor receptor 1 (IGFR-1) protein expressions and clinical outcomes after gefitinib treatment. Primary endpoint was to detect biomarkers to predict gefitinib sensitivity. One hundred and three consecutive patients were enrolled onto the study. Median age was 68 years, female (58%), adenocarcinoma (83%), and never smoker (55%). 98 patients were evaluable for efficacies, toxicities and gene analyses. Forty-one pts (42%) had EGFR mutations ; 14 pts had deletional mutation in exon 19, 27 pts had missense mutation (L858R) in exon 21. EGFR mutations were significantly related to response (62 vs. 26% ; P = 0.001), disease control rate (92 vs. 65% ; P = 0.003) and TTP (median, 10.1 vs. 5.1months ; hazard ratio = 0.64 ; P = 0.048). Both pEGFR (0, +1 vs. ?+2 ; P = 0.002,) and pHER2 (0 vs. ?+1 ; P = 0.001) expressions were significantly associated with incidence of EGFR mutation. Conclusion : EGFR mutation was a significant predictive biomarker of response to gefitinib. Phosphorylated EGFR protein expression is a potent replaceable biomarker for EGFR mutation.
All 2007 2006 2005 2004
All Journal Article (77 results)
Ann. Oncol. 18(2)
Pages: 317-323
Cancer Sci. 98(3)
Pages: 438-446
10019482069
Ann.Oncol. 18(2)
Pages: 317-23
Pages: 438-46
ann. Oncol. 18(2)
Cancer Sci. 97(5)
Pages: 387-394
10018176905
Clin Cancer Res. 12(19)
Pages: 5764-5769
Int J Cancer. 118
Pages: 812-820
Anticancer Res. 26
Pages: 777-781
Ann Oncol. 17
Pages: 1028-1029
J Clin Oncol. 24(33)
Pages: 5247-5252
J Clin Oncol. 24(16)
Pages: 2549-2556
Cancer 107
Pages: 599-605
Lung Cancer 54
Pages: 241-242
Br. J. Cancer 95
Pages: 677-682
Journal of Thoracic Oncology 1
Pages: 684-691
Lung Cancer 51
Pages: 363-368
J Clin Oncol 24
Pages: 3657-3663
J Thorac Oncol. 1
Pages: 226-230
Pages: 2479-2486
Int J Cancer 118
Anticancer Res 26
Ann Oncol 17
Br.J.Cancer 95
J Thorac Oncol. (1)
Pages: 387-94
Pages: 5247-52
J Clin Oncol. 23(11)
Pages: 2513-2520
J Neural Transm. 112(5)
Pages: 633-639
Lung Cancer. 49
Pages: 263-269
Jpn J Clin Oncol. 35
Pages: 181-187
Ann Oncol. 16
Pages: 430-436
Lung Cancer 49
Jpn J Clin Oncol 35
Lung Cancer 42
Ann Oncol 16
Invest New Drugs 20
Pages: 331-337
Expert Opin Pharmacother 6
Pages: 985-993
Br J Cancer. 90
Pages: 87-92
Ann Oncol. 15
Pages: 173-174
Pages: 2092-2096
Lung Cancer. 46
Pages: 247-254
Hum Mol Genet. 13
Pages: 3029-3043
Int J Cancer. 110(3)
Pages: 403-412
Jun 20
Pages: 403-12
Nat Rev Cancer 4
Pages: 956-965
Lung Cancer 46
Br J Cancer 90
Ann Oncol 15
Hum Mol Genet 13