Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type; Y5 V! a" U* p, Q& n+ G! _/ O
NOBUYUKI 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 ( K( s3 Y3 k; \
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 2 n+ U/ a3 B! V) L! g7 |7 g. Q$ n
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ) m1 ]7 c+ e3 W# Z2 d& {: C
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 5 S7 Y6 S k- \ V4 v% c
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan " a K0 e1 l# O( M
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
1 J9 S, Q8 i, o$ ]1 s: } ^7Kinki University School of Medicine, Osaka 589-8511, Japan " K# `# X$ j0 l6 R+ ^( k
8Izumi Municipal Hospital, Osaka 594-0071, Japan
$ T% I3 j. w+ V' _+ [9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
% W9 t0 Y8 i; kCorrespondence 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
" y8 h) f w* HAbstractBackground: 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. 8 f: N+ C9 y% N! j7 w
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