Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type- V* l' }/ x0 Y- }- v. ~: K* j
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
1 s4 Z1 h3 T( L* p+ Author Affiliations
1 [2 b' ?- B2 _) y; ]& T: E, J" t" K9 ~$ \2 t. `- l% [' I
1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
1 S7 I# r% l2 Z* `9 |2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
( k- \/ D, R, m+ n ?; v2 R" N0 k3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
% Z' v6 O, W9 y! D# p6 c) {& D; b6 ~) w4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
8 S8 N7 V% H2 B# w( r% y( P4 T5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 4 R8 q( B5 S& H0 r& d" `( }6 s
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
2 ?) E5 }( U f- J" l7Kinki University School of Medicine, Osaka 589-8511, Japan
% m3 [0 G/ r& r. p( [8Izumi Municipal Hospital, Osaka 594-0071, Japan
$ D0 ^1 Q$ _3 \) d; e9 n9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
1 Z( {$ w2 |, P6 l3 f: }( mCorrespondence 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 / e, P/ u0 M% C( v8 p5 f9 i$ z
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. / I' P% j8 N, f8 k9 R
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