Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
* j& o: _# H( ^+ u$ v( y% BNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan r" V5 b6 a* z4 }/ t0 x" K3 A
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
% o* C! T p9 Y) P6 l3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ( h# d; R( z( P3 z1 y V' `
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
3 N: b) c8 D+ z7 j1 u5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 1 X" i" N9 j# W& P+ B: k, [2 `" e
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
& W3 V8 ~3 r v* G7 |# n7Kinki University School of Medicine, Osaka 589-8511, Japan
# J& l5 k2 @) |' F8Izumi Municipal Hospital, Osaka 594-0071, Japan 6 R7 s4 @/ Z3 s
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
* H$ }- G* S z/ TCorrespondence 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 * U2 e5 s P' o5 c
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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