Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type: R3 v$ X4 R" B5 L1 t! J6 E/ }
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
9 n+ ` x4 P& s" @9 [7 ]& T1 a+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 9 B% z0 T& u4 N6 k
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 7 m+ A/ k: h- F* W7 i
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" w7 ^' S) @# s2 N2 Y4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ( @& o5 m, i! t& H
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan & [! l9 T, b* x k* s: w
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
* p* |) G# E% ~0 a$ y8 g7Kinki University School of Medicine, Osaka 589-8511, Japan ' r: \6 R. b" x7 n: @& l6 s2 c
8Izumi Municipal Hospital, Osaka 594-0071, Japan % R5 M8 F, S. [ j
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
4 t% z9 {3 z lCorrespondence 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
) b( j1 b& b5 j; W# P* a8 }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. % G" f! v, B* g! v
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