Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type- o1 s* A! S2 M5 L5 [
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 3 ~) b* i; X3 S' l2 V& r
+ Author Affiliations
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* T- k/ j7 H' D: I- e/ @2 L5 u+ G! A1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
7 p2 d; l5 H) f) }2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
8 H4 b2 O1 n8 k) Z$ b6 K+ W3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 2 x, r* [. F( y! @: c
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
8 K q$ }& W1 ~2 a2 h5 m# C# I5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 5 d% e: B+ e: ~6 n) |8 h
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ; B0 R" n5 k. b* R+ x: H
7Kinki University School of Medicine, Osaka 589-8511, Japan
1 j$ E3 X& x1 H; w! I ?8Izumi Municipal Hospital, Osaka 594-0071, Japan
b. r4 j; L* a' `# E. A9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
5 @9 W' E: E/ eCorrespondence 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 e; N! ?. z1 B/ ~. b. l- K, N
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. ) X1 h! N. g$ @0 {
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