Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type" K0 ~" U* P" J8 [3 m) l6 }4 L
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 + W; U& S+ R$ H; o. j; y/ B
+ Author Affiliations3 M+ R5 \* c0 B
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
# h0 L2 \! R7 P" W9 ?2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan - l/ x; S2 V: w* `# x4 d
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 \4 W& P9 L4 R* O4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
) w1 }0 i6 F" d) `, ]$ F8 |% W5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan " }/ t2 q' [. f+ } D. j, j3 e1 ]4 w
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 2 G; U- m* E4 H! G, U! G
7Kinki University School of Medicine, Osaka 589-8511, Japan
* f( J! t7 R& a8Izumi Municipal Hospital, Osaka 594-0071, Japan
# a1 s {$ E/ `. r9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 2 i ]0 D8 } d5 x
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
7 O3 h, Z7 u: D2 _2 ?) 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. + X. S2 \, @" j. n, Q
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