Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type% z7 l5 v+ r+ ?9 N/ }# P
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 . k6 K- e- t7 J& X7 Y% y- m
+ Author Affiliations
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! m+ ]6 ?. R) z1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
* U; M: @+ U" U( K1 n5 U0 {2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : j/ p) L9 ^$ }! r0 V, [" J1 g
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
3 Q- y& O8 y+ R6 V* T3 J: Z4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
% Q" v7 h- u9 ` M5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ( \! z1 k0 Y! o: T, ~' S( g+ @/ [
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 9 \% r2 c: k# r* a
7Kinki University School of Medicine, Osaka 589-8511, Japan ! w* R# Y* J% l( M
8Izumi Municipal Hospital, Osaka 594-0071, Japan
% S4 d; }' E3 }; [: R5 b9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
6 w) ?: t6 A: DCorrespondence 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 , j- X/ ^9 V3 k& C: 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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