Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
^7 q% n- {% k# FNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 # N, b5 r/ O# ~) r: A) X9 ]
+ Author Affiliations3 r5 J$ G4 u3 Y7 E9 r; b ?" [# s
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
/ D. e2 Y8 x& {( S8 ~" e2 x. O5 P2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan * s! J3 e9 o# |9 i
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
+ v1 n( M: l# v6 l* h! j% z4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 5 i, C+ h7 a! C
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
. j$ j* l- O+ E! O9 K6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
% a) x5 j a) c/ l9 ~. s7Kinki University School of Medicine, Osaka 589-8511, Japan ! c' `( B2 q/ s6 h" c
8Izumi Municipal Hospital, Osaka 594-0071, Japan % C: n& Y; m: {8 ^ [ F" B x
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan - d" Z, d! M# r6 ~ T2 k& [
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* a7 r- b" i G+ W/ g' `, 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.
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