Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
6 o J& S& X% R, e# j8 q5 H3 i& KNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
3 t1 s. }6 ^$ P) m- Q( L: @+ Author Affiliations8 m, Y) \" M4 j, ]$ F
5 M* s& O$ [. V" @5 x5 N1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan , j+ ^* j9 e. V
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
* k6 {( b( Z+ |+ Y3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ; s" f# O* k6 X( W K; P% f' x+ l
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan : r/ Q% I+ O) ^ Q+ R1 ^) p
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan % Y- V, b+ h1 R2 i- u
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 3 s. A1 j/ c' }+ L1 U& z& m
7Kinki University School of Medicine, Osaka 589-8511, Japan - ~$ c5 \ n" y `5 c
8Izumi Municipal Hospital, Osaka 594-0071, Japan
. L5 j$ ]8 ~, Z |; `/ I y2 z6 ]9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
3 A) }+ O0 r2 u' E; h5 P) a, ACorrespondence 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 ( i& C: I: i/ i7 z7 ~1 ?/ ?
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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