Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type/ y3 d" Q. ^, L, N$ }
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 3 K u3 V7 m' Y1 ?* J
+ Author Affiliations0 a$ _3 l5 o3 e9 P
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 1 W. u& a; h- @+ w- a; H6 r x
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 6 x: E# y G& R y& n; i- P
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
; C5 f& ^7 g8 ~+ G4 D$ Z: ]4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
5 u7 O/ [. J2 J! }0 `4 @$ e5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
. D3 r, e! W& U. m: w/ A& u6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
2 |" [: R0 ]( K; j M7Kinki University School of Medicine, Osaka 589-8511, Japan
- T6 X" O( Q3 f+ Z+ W# u8Izumi Municipal Hospital, Osaka 594-0071, Japan 8 d0 v m: t8 t" m6 k
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
2 M8 A" F* [4 q4 i. d0 Z2 eCorrespondence 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
& y2 j3 p* j& [$ b/ c2 GAbstractBackground: 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. # E, K& C+ V9 T! O* d
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