Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type" `6 p9 }( ~# W) \# G
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
' x& d5 V' j" y+ Author Affiliations
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3 Z/ {) u' u9 W* l f7 b7 m+ x1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan $ d9 M- Z+ I, P
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan & f# R1 C+ `- I/ v' {
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ' }8 G9 k% J1 y% ?% v4 X O
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
, T8 p) O# k2 K0 O5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
/ `2 F) R% i# ^4 r! ^* l6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan + R, @; a( V* _. p0 f" A) r
7Kinki University School of Medicine, Osaka 589-8511, Japan
7 C* m9 T% r6 M1 D3 w8Izumi Municipal Hospital, Osaka 594-0071, Japan 7 K! Y0 N: P0 i1 S6 O7 R3 {& |* Z
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
8 D" D' h* E% ~# f4 Y) ?# CCorrespondence 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
2 S) @ _4 D) F" pAbstractBackground: 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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