Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
/ B/ X2 Z1 b! e: iNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
8 ]; \4 }. e" d+ Author Affiliations
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/ i4 m1 ~: o0 o8 J4 h& ?& M# L1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ( w' V( q' K9 U( b
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
8 K) m. P9 D0 \ k( @ T3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan $ D" u t" r+ p4 u! T+ G% Y
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
- e9 \, |% R8 @! q+ M5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan * L( z# `8 u6 a5 f* o/ q
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
) f& m+ c" Y7 _6 p4 s7Kinki University School of Medicine, Osaka 589-8511, Japan
% x7 D! z/ ]' ?9 ?- |) O' \" C2 A) J8Izumi Municipal Hospital, Osaka 594-0071, Japan
# X# r# j, B1 y/ J& H2 j1 R9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan . }; ^/ M: }" _
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 & B! a3 q# W, [- b* }0 L; M% `; ]
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. : L! m" Z1 g+ I9 E. }9 I
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