Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
: f2 a5 z e! O) WNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ) ^' j; x' O9 Q( ^& V" k
+ Author Affiliations
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, E+ \" h" z" U9 C3 ?; z1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan & u* Q4 |: s- p7 d9 U
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
% \$ N$ J6 O) K0 A2 q3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 @1 _* U% D, `4 O4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan I& l G; M$ r/ [6 l( @8 T
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan # `+ M9 ]/ P" g3 G6 N0 n) z9 j! c
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ) w0 f; ]2 b2 l+ S# J4 |1 z/ k
7Kinki University School of Medicine, Osaka 589-8511, Japan
9 k# B; a" A% {& m( H8Izumi Municipal Hospital, Osaka 594-0071, Japan
3 x' I" Y' H8 K0 t+ h# c9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
0 g& |! G4 B& U0 p: E7 ]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
/ d4 B5 S! O7 }) x5 _9 I+ YAbstractBackground: 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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