Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
6 G+ ~+ A% ^! [4 B( INOBUYUKI 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
6 L: B. m5 h) ^9 {7 D" U2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / u# e6 B4 b, d; H7 V
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
& W. M3 E0 e9 a8 `4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
& V* S4 Y- ^# z% a$ c5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ?. H! a3 [1 ~
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ' t) `' T/ t; X* v5 T3 w7 Y+ b
7Kinki University School of Medicine, Osaka 589-8511, Japan ' S3 `( w: B: k3 p- q7 Y
8Izumi Municipal Hospital, Osaka 594-0071, Japan
) N$ a/ M% c- m+ s$ A9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
0 }4 h7 a- }0 _) s9 g8 LCorrespondence 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
* x0 M/ n: J9 qAbstractBackground: 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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