Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
( [8 D. n7 X# m4 a( z6 ]8 t8 vNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 1 q* }; k6 T' v& ?
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
1 }/ I9 a' O J1 @/ I3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ! m3 j7 k0 B( d0 v4 a1 N* f) K
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
, ]! T* d5 L1 ^/ N$ u0 q5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
6 g: i, \- \0 ^" v6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ' j8 W& [& a5 I! N7 l
7Kinki University School of Medicine, Osaka 589-8511, Japan - z) c$ m0 ?; _* R
8Izumi Municipal Hospital, Osaka 594-0071, Japan : A7 \5 X. I3 @& t X% _
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan : B9 E2 j3 v# N! x8 z( r! H* E' D6 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 , p' E$ V. W$ @* M
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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