Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type5 |6 O4 C: C6 e: O
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
/ w3 S/ E: j: d" z2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 2 U% K. I i1 }, A/ Z a
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
+ Y& V% c% Z ~5 `) K1 R: k4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan . m4 E: a7 `2 D8 Z: e0 C" ~
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan - H. n T' _; R* T# u
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ! R+ p: h% K* V
7Kinki University School of Medicine, Osaka 589-8511, Japan 4 ]$ z' _8 Q7 W9 @
8Izumi Municipal Hospital, Osaka 594-0071, Japan
' S9 h) B* \9 S6 V; U' A& G* m) w9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan & Q- j* i+ b5 f4 x
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 1 x( W) W! S. O& r( B
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. & Q6 H* \6 A! e' X9 N: X9 l3 Z# I
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