Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
* E, ^3 `% ~ S% m! |NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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2 |9 ]* ~$ q$ B- R/ _( T- F. K1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
5 ?8 O* J' Z' Y, V! V2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
6 I; t% I0 w+ s0 l- a2 M3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
+ P2 W5 z5 M/ W* r. w, m( B4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan . S1 Y$ t$ O% ^- ]/ w
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 3 p4 _, q: J1 t% y: {
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 3 X. q, t& R) |! n# w
7Kinki University School of Medicine, Osaka 589-8511, Japan
: X S3 l; A( X0 y: u& g2 K% w8Izumi Municipal Hospital, Osaka 594-0071, Japan
0 F* Y0 J; P9 i4 r* r( K9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ; T; I1 K3 m, Q2 ^8 ?! v
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 / F& d/ H% N1 j, t7 d3 i0 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.
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