Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type% t! [# V4 m; J' N8 I
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 " F2 {3 a# x2 R) x" k' L
+ Author Affiliations
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" H8 t" u8 z" R1 i3 n9 I5 h1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 0 h0 }$ z% y+ k5 O7 s* G5 h" f" }
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan . w% }1 f( f+ N
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
: v. E) T# c6 u4 R3 r; c4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ( x: h5 Y* y& M. t4 N2 h" m3 I
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 0 f% O6 e$ S) u2 H9 ]
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
/ ^8 _% R' f2 W" O7Kinki University School of Medicine, Osaka 589-8511, Japan + j; X o5 T" b; X& [# P+ O0 O
8Izumi Municipal Hospital, Osaka 594-0071, Japan 1 `2 o) z, z1 g, B. v' Q
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
+ L( m! L0 b! I1 ~1 s% 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 * P. o5 D7 T4 o4 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. & l9 K& e4 ^ [
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