Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
* l- C" f2 f d* j# m" V' ENOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 7 ]3 @9 j3 J& N; |# U- }9 d
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
0 @3 z/ X' q$ J2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
& Q+ z( O; J* B( _% L1 n3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 2 m' J! p! o$ K2 k! {8 C
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 5 s7 w% y1 ]4 _9 @, M, S
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
6 m; M/ U/ t) l9 W7 i: u6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 4 m* T. T3 I% v
7Kinki University School of Medicine, Osaka 589-8511, Japan % Z, c3 c, ]: C, J3 b T
8Izumi Municipal Hospital, Osaka 594-0071, Japan & q- w9 q, r# F- x( Q1 W
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
0 G# C, p8 P+ L5 _7 c$ q: WCorrespondence 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
m! ^) J# r1 R' j/ sAbstractBackground: 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. # h3 \% ^9 I n* k$ m9 Z. E2 \
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