Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( M/ q. R9 g) H! B( R
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
# E' A$ K/ p9 c- L: Z& ?9 t# e" q+ Author Affiliations: b) c: S. `3 T( l, h7 m
1 l N7 b& ^# g
1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
/ Z5 J4 a, g( H2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan * p ]% K+ S8 k: J
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 7 _+ u, C: E ^+ `6 l
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
h9 K( n7 O9 y J" R$ C5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
6 C$ k) A+ c( U5 p& H8 s3 O! w6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
$ l# [( U t' J! ?7 s7 ?7Kinki University School of Medicine, Osaka 589-8511, Japan . D% v5 V5 P/ s% b. a" F# s
8Izumi Municipal Hospital, Osaka 594-0071, Japan
# e. D5 p/ D0 E5 f# t9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
* T6 e; b" Z8 P$ h3 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 4 _* P# M% F% s. 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. 0 \, b0 o. y x' w( j
5 b7 q9 d9 y/ [4 i( {
|