Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
5 e6 }7 n+ u; rNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
( E9 y7 l: J/ G/ ^, J1 i2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
! K9 o0 E, t- u }( N3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan , i# q6 r$ ?( X/ ^& u
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
3 U7 K, j1 ?% H6 Z& s5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ! o/ @1 b" p+ _ ~/ h6 x/ {
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
% x U& w9 D8 M; }) Y& j7Kinki University School of Medicine, Osaka 589-8511, Japan . m; ]5 s2 {$ r2 D
8Izumi Municipal Hospital, Osaka 594-0071, Japan 9 B2 |: W3 x* Y/ @- _# t: x, I$ ]
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 7 _% h. }* K( h$ G# O. T# S) B7 ]
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 1 Q! D) S% x' Z5 K) W
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. ; |# M" G. H& e! Z: h* Z
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