Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
. B$ G; E8 S6 _" r8 ~$ jNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 . r7 u4 P' u8 v
+ Author Affiliations
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+ o* S$ S. Y- @1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
* P4 ]$ u9 l* o0 \2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ! ]7 A" x4 @/ c U& N
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan + t' \8 O$ b0 d! X
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ; x7 C* ]4 F+ A- g% G& ]) [8 {
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 4 _1 G6 L* n, T0 `9 k3 l
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
4 H% L4 W2 }+ w9 ?; c6 P/ S6 M0 M6 v7Kinki University School of Medicine, Osaka 589-8511, Japan 7 Y. V; k, ^5 U% L y! S5 F
8Izumi Municipal Hospital, Osaka 594-0071, Japan
5 n5 O: [* }( `* t x( a N9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
5 j$ d$ r5 L0 \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 + K# Z0 K3 Y0 G. a
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. @2 t5 X# {. i& O
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