Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
; q2 e. o3 A, U) c& k( o0 p: {# oNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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) N; w( i( [/ k4 W6 d1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
6 p0 Q. N" X2 s" p, j% J2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / T, N* x: R2 U3 {1 A( c7 h
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 8 A/ F* A3 h; m9 _. k
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
0 |# }! T$ {2 t5 f5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ' I% E( u, r! c6 n$ |
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
; L2 |! g% m* R6 h/ i; ?7Kinki University School of Medicine, Osaka 589-8511, Japan - `# x; ^- F8 P. F8 k( Z: f
8Izumi Municipal Hospital, Osaka 594-0071, Japan % ] W2 H* k: d p$ U) A) r
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 1 M7 Q( Q0 E7 `% n: V( n, z
Correspondence to: Nobuyuki Yamamoto, Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan. Tel: +81 559895222, Fax: +81 559895783, e-mail: n.yamamoto@scchr.jp
9 h" [' [0 Q) u2 C# J1 @# qAbstractBackground: The antimetabolic agent S-1 inhibits thymidylate synthase similar to pemetrexed, but through a different mechanism of action. Whether the antitumour activity of S-1 depends on histological type remains unclear. We analysed pooled data from 2 phase II clinical studies of cisplatin and S-1 in patients with previously untreated advanced non-small cell lung cancer. Patients and Methods: We comprised 110 patients with stage IIIB or IV non–small cell lung cancer. Univariate and multivariate analyses were performed to determine the effects of histological type on progression-free survival and response rates. Results: On pooled analysis of the data, according to histological type, median progression-free survival was 3.8 months in patients with squamous cell carcinoma and 4.4 months in those with non-squamous cell carcinoma. Both analyses showed that progression-free survival and response rate did not differ significantly. Conclusion: Unlike molecular targeted agents and pemetrexed, a combination of cisplatin and S-1 may be no difference in response according to histological type. + j4 N5 V5 h$ j+ g e! E" i
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