Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type, P- j0 L3 ~ n3 a; z6 S/ E$ i% j
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 # e5 n' p2 V6 P) g
+ Author Affiliations* H" T% p/ \. q* g$ k9 `; L g
, ^9 S+ B# V" {& @7 n# Z! U, {" y1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ' M. N) r' o* f% a1 p& C9 {
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
8 x& F/ {: h a' W \# u2 N0 K3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
6 x4 ~2 p% @; k( ]4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
" C9 j- O& ], P" |: S# i5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 3 l* O: x# C+ f1 u5 C
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
1 p6 ]( R0 [( Q1 T. Z; `* G$ T7Kinki University School of Medicine, Osaka 589-8511, Japan " b# F x* W9 r1 [: u) P3 B
8Izumi Municipal Hospital, Osaka 594-0071, Japan : W2 a0 Z- z3 @ c& L
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ' @+ M, j4 q7 z! v7 C
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
8 z, ^ \# K( f6 ], ?* A! rAbstractBackground: 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.
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