Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type1 u& c: w9 W8 |% v$ _) \
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ; c. p: R% w6 G; \- ?* Z. b
+ Author Affiliations
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$ R9 u8 a& ]! E/ t$ l$ R: W1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan & [* `1 w b L$ z
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
8 O& {! I, }* y" q# u9 j3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 1 y9 a( W: \1 }0 _; c
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan $ G6 [/ ]' h/ Y/ S2 k/ A. E
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
5 q* r! R; m, Q& @' ]7 d: B3 D7 C. Q1 Y6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan - {+ y( {& j$ @
7Kinki University School of Medicine, Osaka 589-8511, Japan ' }4 a _+ M2 [
8Izumi Municipal Hospital, Osaka 594-0071, Japan 8 r! ]) z2 ?( w: p1 ~: [# \
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
8 P9 Y& G# \0 X' ^( ICorrespondence 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
D, S2 z7 q% p, sAbstractBackground: 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; h' w, @6 J1 f
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