Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type' _( q8 p* K: d
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 c( } k2 C! f3 ~( K8 \. i
+ Author Affiliations' b; ]8 k) }$ S: l: j
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 2 K5 `1 v7 X# F/ {9 _' d9 @
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
& k( `: A3 l3 @# w- u/ X4 S3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
1 W: k, @% P7 v: l8 W4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan # q, O+ t, ?$ J. ]
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
" I& q2 Q% q/ V1 a6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan - P- m; ?3 y; _% s
7Kinki University School of Medicine, Osaka 589-8511, Japan / J$ J; _/ s+ y4 s/ d/ Q
8Izumi Municipal Hospital, Osaka 594-0071, Japan 0 ^2 H& y1 m0 \& P
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
7 P3 N' h0 v# _+ D6 D3 T" ]# PCorrespondence 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 9 f) ?0 K* E ]
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. % n* [4 f8 D3 `, k
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