Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type* I5 _6 S0 s b. ]4 q1 Q# G
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
% r$ B3 j6 m5 n" Y ]3 b: b+ Author Affiliations/ Q, f0 H5 n( a& _
5 B% y* a/ V0 d, G, V5 x8 M1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
1 l! D( w9 [: @0 {$ u) g1 ]- |9 `. j2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
* A# J3 j, u2 n M3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan * _: d$ P# F0 k) ^( p
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
9 |# w9 Z9 c" M& k; c: f5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan , w( N9 D0 A _7 U- H4 `
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
; u6 O; L( O( @1 h1 \ }7Kinki University School of Medicine, Osaka 589-8511, Japan
: B9 ?" [' z: V4 M8Izumi Municipal Hospital, Osaka 594-0071, Japan
! R: C+ `7 m1 w7 u3 {( J u- s+ _ i9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
- _- H3 y/ I9 M+ N9 ?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
5 F5 X6 @' F4 B# EAbstractBackground: 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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