Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type" ]9 g+ O4 C# z3 E& G
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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/ {) f3 \ p. O+ ^* y0 J1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 6 w; w; g/ k2 c# H* v4 M, R0 ` Z: E
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 9 ^* I% m, b& Z ~4 h( \
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
: O" M/ `6 K2 ?$ ~4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
g( @8 F4 S3 ?5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ! w4 ?+ n- y; C2 y* g5 r m
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
2 j/ v, Y" m! a& g9 n( m7Kinki University School of Medicine, Osaka 589-8511, Japan
# Q9 v& ^ Y0 `- F: J8Izumi Municipal Hospital, Osaka 594-0071, Japan # A+ C5 I! B- l( k
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 5 I8 d3 j" E, T: d. W3 ?0 E4 `
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 ]# w+ {+ M9 x- W8 a9 v" T
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. & E6 k; f; L# c0 w4 E
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