Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
3 N2 {3 G4 u& K$ jNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 " e$ x6 K8 O7 F9 z* V
+ Author Affiliations& y/ X/ p/ j# F6 j& c
& |+ P. k# S+ @# ~9 U9 m1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
' ^; J4 l! p8 \* q1 P. i% s# a2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan $ y$ ]% p" T' E8 y$ k2 k+ N, |6 y2 }# }
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
% }4 Y O5 `% G6 z: q4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
F8 L' ? T+ S3 X q% Y5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
. V) @& F& p4 c A7 a* \+ h6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 7 w8 w, S. K8 n6 r; Y
7Kinki University School of Medicine, Osaka 589-8511, Japan ' v9 P, l7 e) P
8Izumi Municipal Hospital, Osaka 594-0071, Japan
J: t: L2 y# x+ Z9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ; r( s+ Q9 |/ D" s3 u
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 ' c/ t, x# r" ^# z& v
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. , j. @- d& @2 f2 A9 o4 ^+ k j
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