Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type; m0 l* ?6 D" M/ N6 B
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 7 V, `# h9 U* j3 x
+ Author Affiliations# Z. p3 z9 }3 u$ K) |
+ g) |, ~% Z) W1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 0 P1 n4 K9 n. T0 N* R
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 9 J X: `- [# R- J
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan K7 p; @" r) A q
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan " [ c: i1 K5 h; W
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 9 g$ N! X; S6 [( C$ ] o2 d
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
: w( U3 g( m* L' c0 R5 a# D7Kinki University School of Medicine, Osaka 589-8511, Japan
A" M- B* W N" c4 c1 {8Izumi Municipal Hospital, Osaka 594-0071, Japan " ~# V3 A# f) S% j
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
5 y# |& E( E2 B: F* l$ b' u, NCorrespondence 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 & V& z/ d! z5 u+ M- N5 z: Q
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. 6 R6 n% w$ X* t3 ~& v7 ~
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