Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
! Z9 G, Z; _3 `/ K; I8 MNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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0 Y5 ~6 ~% Y% R$ u6 d% D& o1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
1 d' W& G7 d7 C2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 \" A r$ U! g0 Y0 U3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan * I: r7 L% A1 s+ W" \/ e# I( p
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 0 p' z" a' F; i/ H! o7 z
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 7 R0 t7 u5 a7 P- r( v. M4 Y8 p/ h
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan - V! c6 W$ p& q0 F" x+ S( H$ Y8 X% Y
7Kinki University School of Medicine, Osaka 589-8511, Japan 6 J; {' M4 x! E- W( U
8Izumi Municipal Hospital, Osaka 594-0071, Japan
2 v* M% o3 P. O6 l9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
2 @; Y! g" m- qCorrespondence 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
; Q( u( Z. l6 y* mAbstractBackground: 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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