Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type6 \) a# U4 T0 A& k2 c
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ) {' p3 u' k$ I) G$ n
+ Author Affiliations& O1 T- B* V9 U
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan + @ P* l+ S* s1 [ o8 P9 l
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
, E1 R O2 l2 c3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 D% v! r$ `- w$ y. l: n5 a4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
( i4 A4 v% F0 S- V+ z" F" b: D, p5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 4 Z0 `3 Y7 h& g, ]9 U
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan n/ o8 W0 `$ a' O
7Kinki University School of Medicine, Osaka 589-8511, Japan
) O) g3 L' A$ u9 _( X2 V% I8Izumi Municipal Hospital, Osaka 594-0071, Japan 3 f9 P+ H0 a7 C8 X$ y: o' }
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan # ]3 g2 K1 t( g) j& A+ ^& D
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 : B& P7 R+ d+ i. A0 i5 W
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. : U1 Y' S* B" {& [+ |& y2 w
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