Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
# b w6 \/ `# B2 A4 ^; ~0 }NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1 M" ?* ^6 K1 P$ e* s1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ) u! Z( l6 {! w; R
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan + o" Y; K& d) ?; ]- z) C* |, ]
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
3 M' P0 r& X1 F5 b, F4 J2 e7 @+ t4 L! H4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 5 M( P5 v0 x; _2 w6 @
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
6 c5 U7 n9 P j. \4 m& _3 K5 [6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan # \# U2 V5 l4 Z. A ?% c5 Y
7Kinki University School of Medicine, Osaka 589-8511, Japan Z9 c% `" V8 X" L( n3 t9 K
8Izumi Municipal Hospital, Osaka 594-0071, Japan # b8 q Q, a9 J7 u& j
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
0 x+ p( f8 K8 i ICorrespondence 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 % W7 G3 b4 z; Q4 B9 J
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.
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