Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
% V, g" K5 J6 l2 I6 j/ @NOBUYUKI 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 3 p5 N1 }* d* Y2 K
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
^" a! c7 _9 Y% r- E3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 ?- ?1 Z1 ^. C8 x
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
9 h, o9 _; y7 q2 K+ f( E; f: P5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
2 L" b5 m; V0 C5 t, e! B6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
: d: c1 u! N. ?/ D: F7Kinki University School of Medicine, Osaka 589-8511, Japan
8 p& q7 Z" @3 Z8Izumi Municipal Hospital, Osaka 594-0071, Japan 9 O6 t9 j, y8 W7 z( m
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
( k& I4 x& b* {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 ! z( h2 C3 n$ {% D
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. . j- ]$ \. J& r7 z
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