Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type M% R: {! C8 U3 G @7 T9 |$ g
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 8 W" s! i$ y2 n* ]# J3 U
+ Author Affiliations
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( D- l( F/ @* k" y& M6 }; C1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ( B+ M5 B1 W% C+ G2 [4 B" }
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : v5 t! ] P( N5 i( b
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 9 w, ?; Q% C6 E" A# \$ h; b# S4 h
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
% Q- ^; w* P" u; f( O5 u5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
9 U9 E0 p. s: o- Z" K$ I- p0 `6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
+ e* ?+ p( s2 u! x7Kinki University School of Medicine, Osaka 589-8511, Japan ( i7 l# B. C S
8Izumi Municipal Hospital, Osaka 594-0071, Japan ! @: S% I9 \% Z
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan + q6 T: o6 D6 Y8 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
/ K! L9 g. Z& BAbstractBackground: 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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