Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
! ~2 i! l* T0 DNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 3 L" I* ~5 W' c: f+ D4 I
+ Author Affiliations0 x' m6 _) k3 l! j+ o8 @
: k0 V/ ?2 S* Y! ]: t% {1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan . A1 K' l, Y d- j) Q# t, B) D. f
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
2 Q/ R4 A; }9 D: k2 O" g0 x; f C3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
. v( A$ y/ h- ~4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 0 l. `9 ]% K5 D
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
3 L9 m# k* z, g: R1 i6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
. K! P9 B. @. g0 x7Kinki University School of Medicine, Osaka 589-8511, Japan
, N! H5 R: R6 s7 J" e4 J8Izumi Municipal Hospital, Osaka 594-0071, Japan , n w3 F- F( ~7 I4 n. B
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
4 o- n' R4 c8 _+ yCorrespondence 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
2 w# v2 @. d8 S; l- @# [/ p9 F) WAbstractBackground: 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. , U6 m! j) u; K9 l* s) p7 A, d
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