Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
; D- V, F8 p( o* L4 a7 B! w( Y( pNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 % k9 q5 l6 J1 O
+ Author Affiliations, l W4 s5 |9 |9 ]: @# U
2 ?" ^1 }; t- |* B( D* X1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
) F j& i" X; q% C- h0 b f2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
& P5 e, f4 c! M V3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
0 y [5 Z1 F: h# I, A. t4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan + w* X }5 n& l- _$ o6 ^
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
8 Z! ~2 s+ e: M" y$ k3 E8 \6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
0 W9 J4 f2 ?0 T: {6 \7Kinki University School of Medicine, Osaka 589-8511, Japan ; P+ }8 v, {/ D4 M+ b
8Izumi Municipal Hospital, Osaka 594-0071, Japan
5 F* U! K( o1 ~# V9 B8 B0 Y9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
8 f X' d8 Y$ t# A8 W# P2 C2 KCorrespondence 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
3 ?& f! n2 Q0 ?& DAbstractBackground: 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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