Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
2 O$ [. l" d8 }/ c: l. hNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 5 H0 E1 C; S# F) v1 ?
+ Author Affiliations7 B+ L. {7 q+ B9 g z8 f' U: a2 l" J
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
) E% e5 [4 I2 i# ^2 f8 ~$ J2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 8 X: z2 K9 l- | Z
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
6 y9 c! F2 ]" C) Q+ K4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 2 l, n) T: q5 c$ E# T" i; I
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
: \% A$ G1 S* T' n; O6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
& a D& @/ x* V2 q% @: p' R' Q! K7Kinki University School of Medicine, Osaka 589-8511, Japan
! I! N9 ]3 Z3 s' Q3 T+ R8Izumi Municipal Hospital, Osaka 594-0071, Japan
- B$ o! x: p' o. q9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
$ z% x+ _# p' }0 a7 v @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
- g9 j1 j1 E6 ^7 g9 S; r9 zAbstractBackground: 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. + D* \7 V4 I G f& O
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