Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type0 W, \0 c' f# ^. S
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
: S) s8 }2 _1 h3 e) m) x+ Author Affiliations. i. {0 e+ \- z
; ~3 {$ O' S- t5 |- g1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 3 B: Q$ `9 y% m5 I' b
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 9 t) G* W& I* a5 }
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : E4 ~6 g# p% [' y8 m$ I
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 5 _+ G9 n; M1 ~" B! B6 i
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 5 \* X( M0 |' G+ B
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
* {1 \/ X. L6 g' Q( l) d% B7Kinki University School of Medicine, Osaka 589-8511, Japan
1 ?) F1 O! [2 a8 Q) @; `) J8Izumi Municipal Hospital, Osaka 594-0071, Japan * H- X9 g1 U1 i1 U4 T
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
' c0 K5 o- U& L4 G d2 w- f/ {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 ( ~- R8 A) T# k- S- Y A
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 V3 {- t0 N% T( [6 Y$ X
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