Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type" W* i! H" E1 R! N1 i) Y6 _
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 5 ` u& h: Y6 c
+ Author Affiliations+ q" a' C) [+ { ~8 y v
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 1 s7 H6 r$ q- ]$ T
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
$ [) k e B' \1 |0 F3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
0 K q' \' V/ n4 N/ K4 M0 i4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 0 v% f1 w3 ?. F& z7 C1 q
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
$ Z# S2 Y1 e0 X6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
! c! Z. @' p/ c# M" {5 f$ ~7Kinki University School of Medicine, Osaka 589-8511, Japan
) G- p: i/ A/ I" q$ u. _8Izumi Municipal Hospital, Osaka 594-0071, Japan 4 W4 b5 m4 g+ U3 V9 l
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan + C$ E+ F6 Q8 w& b) u4 w/ u; W$ Z
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 5 J. e& j$ r, Y1 v
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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