Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
5 [/ q- k0 M% b) I: |+ o* vNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ) f, G* q8 M& U/ H/ ]8 R; p* [
+ Author Affiliations# G2 z5 O% b7 ~# d, O4 a# H3 J
& ~7 d, b% Z- u2 Z W' N8 x; c6 u1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
; f2 B! U% c4 ^# @0 q: G2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 C8 A) t' [0 I2 \; ^1 E3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 ^& n1 K2 {# `% _* l: s4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
" Z+ F0 W+ S$ K! q* u5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
* l F! G5 o% z0 l& U6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 9 {0 ?8 i/ t! D' y, ~' E
7Kinki University School of Medicine, Osaka 589-8511, Japan
% `8 a% A2 c) i8Izumi Municipal Hospital, Osaka 594-0071, Japan * J. p* |6 X/ {( y) K
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
+ X" n7 u! l1 l( \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 - q; D: k) Q/ y9 L7 F) R0 m: u
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.
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