Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type# S# @# N& U% c3 X: ~/ e6 W
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 " o3 c: }) z: Q8 r k
+ Author Affiliations' H; l) V+ K. N) @+ L
R6 r* y+ z7 Q h4 }7 |7 F1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 8 D4 y; G4 ?9 S3 v! G h
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" J6 y7 ~1 e# t" Y9 A& J; f# J3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 9 X# O: u+ d" _2 m
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
& Z9 k9 {/ t2 W0 K5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
) ?8 m+ }& ^+ _6 {5 M3 ?: c( C6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
5 ?% M1 N# K: i7Kinki University School of Medicine, Osaka 589-8511, Japan p4 M5 Y9 B# {/ j- ^
8Izumi Municipal Hospital, Osaka 594-0071, Japan % R. F, r8 J2 h( G6 Q. ^
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ; t' k! {3 B3 I; O: L. E# o
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 - F! y9 }5 A* T, \7 V4 ?$ A
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. / ~6 K& s( b1 X4 p& A
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