Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
+ t8 Z9 V( w6 L" @5 _) F( ZNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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. l1 V2 o$ @% k8 P1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
9 O, X, v3 Y. i! y7 u. B& {( i% _8 U2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 l4 S0 G! U( z, C/ J# w
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
, S l8 R8 V* s* p/ Y6 F4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
2 b) {" l3 Y6 Y4 `; j; K5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan . u% V, A: C# O6 |
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan $ v# O- u' B# Y: J& W
7Kinki University School of Medicine, Osaka 589-8511, Japan
, s1 {4 O, X D' l+ C3 r$ y- g8Izumi Municipal Hospital, Osaka 594-0071, Japan
% m4 t* A+ e a& i- `: h8 c9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ' M9 T9 q0 m% y+ Z8 ]
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
+ e- g. L2 f; t6 @& V; }7 t: ]AbstractBackground: 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.
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