Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type1 L- Z! ~' x ?
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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; o* g! k' h% R7 E1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan J! Y* N8 [0 `- ~& ^5 N9 v$ v; x6 X) t
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
0 g+ j$ i" P: ]: d( |. R% A3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ' x! N5 y9 ?/ `4 `/ d$ y
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ! Y2 ~) E" q% D% [7 O& P
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan R0 E8 \& ^2 S4 |
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
7 y( B z& B/ j0 w3 A' [- M" o7Kinki University School of Medicine, Osaka 589-8511, Japan
+ O; s6 ^: U4 W9 e! W& i# Z8Izumi Municipal Hospital, Osaka 594-0071, Japan
6 u; m/ `! G9 D$ O4 k: I9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 2 e8 g9 X1 e! U; o G/ ?
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
. A, \: i" f5 ]! zAbstractBackground: 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. 2 K2 A8 M- E0 I. Z
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