Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type. V [: U6 m8 @* z
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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. g7 U* W) d" A9 l: n3 h5 Q1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
7 ]; u' z% W# b) m2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
2 w3 V8 d0 w3 G- `" E! R( L3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 u6 @% J2 }2 ~. }- [4 E4 r- D
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ; F% a$ W0 s2 Q4 @$ c* A) @: ] A
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan : `- @2 V& a" U
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan + I% U: n/ {, v
7Kinki University School of Medicine, Osaka 589-8511, Japan # @/ o' u1 N" S( Y# f# K" w
8Izumi Municipal Hospital, Osaka 594-0071, Japan
& g' H$ w; x* p( X, L$ j1 ?$ T9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan & g' o) n9 z6 v7 U9 `( g$ J, J- s
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 + Q* Y& X- k$ y$ N+ p) f
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 g# }- T5 s, d. V' F+ E$ S& }' q
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