Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type7 c, Q3 [5 F, P; Q4 q( i
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 . L$ B& y6 z) a0 X# a' y; E& M6 X2 K
+ Author Affiliations- n/ p( L5 v1 `3 t
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 8 ]* i7 g6 i) D0 `
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
- }) G. L9 G" t# ?" h0 y3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 3 t4 t$ \' T* g) x$ d: r% ^( ?9 L
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
1 H% C3 @ F2 q5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 5 x; }; ?( k+ W$ U
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan # T, x5 }4 m3 u- H M( }
7Kinki University School of Medicine, Osaka 589-8511, Japan
. M, r. W$ N! Z4 w( _. L" _8Izumi Municipal Hospital, Osaka 594-0071, Japan - R6 F* ~# i6 A3 b4 A5 e' e
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
. u5 k2 f% \- \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
0 O; p: g& F/ o+ K3 ~! g& n5 g& vAbstractBackground: 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. ) t+ a% @$ V$ b' V: N- T6 q
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