Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type% k5 S3 c" O4 t$ o0 ?% z
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 & V! O, l5 ^; ~
+ Author Affiliations
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" ?. P# g% S' z% d1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
* O; e( J! O% m; t. a2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan . N, a$ U# v6 A; j) }& y: [
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan + l' Z& k. N4 i0 I7 f
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan # c3 M' V3 z1 _3 Q
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 1 D: G/ n, ~8 Q9 I! a9 r/ c, H* }( l
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan , v' v: c7 M7 Z2 X3 f
7Kinki University School of Medicine, Osaka 589-8511, Japan ; W5 M8 v# q* b( J
8Izumi Municipal Hospital, Osaka 594-0071, Japan 6 H/ H' J0 L- C# M9 k0 z
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 8 u% j* |3 o4 u) @
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 5 K- H4 K- y& o+ L; X y; g
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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