Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( c0 V8 o2 Q. H% N8 [0 S/ m
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 8 C4 q' [9 H* {! T1 g
+ Author Affiliations
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W* T4 r* P+ h4 G2 Q" c6 q8 `3 W1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 9 q- h5 E& ?6 K5 Q
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
# }1 I( k9 U- x! a' I1 E3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
% y, r. T7 e3 o# k4 E$ ?2 K1 M4 D4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan # j5 [4 O4 p+ A4 a9 B
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan $ y& k1 A+ g4 l3 K
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
. E+ G( N9 k+ N; g( W* f% W$ `7Kinki University School of Medicine, Osaka 589-8511, Japan 3 P& s, o: r9 f
8Izumi Municipal Hospital, Osaka 594-0071, Japan
- Y) c/ J, N' k) {& {' G9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan / E8 {4 h" R. Z& k# E
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
8 w3 _9 w( d- C+ [8 ]; P* v/ j) U" m$ CAbstractBackground: 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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