Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
% R) A% \1 C7 ~# w3 H1 ANOBUYUKI 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
1 N- c) k9 m# E# e* t2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / X3 B$ X7 }. Q* R
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan - F5 u* A1 B2 o* U
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
4 }& P0 I+ b3 S1 r- {/ U3 b5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan , d+ l$ g: R! a3 }4 x* h0 u
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
( F; R7 s6 L/ B2 y7Kinki University School of Medicine, Osaka 589-8511, Japan
- M/ |: O# U! b) f4 R8Izumi Municipal Hospital, Osaka 594-0071, Japan % Y, g: a0 y7 n, B8 [
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
* ~" B- c7 J, |$ S' I& v' _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 ' N: O. j( h2 @* ]/ a' T
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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