Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type) x9 p! Y; U& n, k0 e4 i7 ]
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 * w% S8 Q6 a3 z1 {
+ Author Affiliations; ~! M/ R; F. y0 i
1 p5 W/ X6 W0 H# C$ D4 k# I1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 1 d* L5 {" F1 ^- U, l
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 |9 u6 R; a9 D/ S; S5 m3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
~6 Y! _- l1 B' M! E5 @4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
" z: ?# T% m3 F$ V- h2 S5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan + [3 O* M1 L3 t |# a) C" d. J3 J
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 4 E$ L* N0 r$ \# O
7Kinki University School of Medicine, Osaka 589-8511, Japan
! u! _, F* ~# d/ `& P8Izumi Municipal Hospital, Osaka 594-0071, Japan
. E% y: ~1 L% a8 ?# {' X) b- s; e9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
! M+ X7 H. q4 y: c! L f, b9 c, y1 PCorrespondence 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
& i+ j6 u1 E- o7 ~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. / @$ S% e# N; [ U8 p& Z( G
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