Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
: T& K! F) P$ R* p" E2 Z* ~ @NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 * E. x* d* c. V. h, N
+ Author Affiliations' t$ V* A' r, H7 z P$ m2 m o
& `6 i+ X* E- Q- M1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan / [" H- D2 @. r3 f3 a
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
2 ?! U! _+ e5 a0 M$ B% `" T3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
% v! P3 u2 W, V% c! d$ E5 f" o4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan . M5 _* l: a; ~; e- m' m. A
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ! R! e" p! v+ U( [! Y: s
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan * U- `9 Z# y: L! B: `6 _
7Kinki University School of Medicine, Osaka 589-8511, Japan 7 {; O2 P5 m7 {7 x* x* H
8Izumi Municipal Hospital, Osaka 594-0071, Japan
' @; H1 N5 T1 a( J1 x0 y# W' r9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ) ~% {# C& ]# X
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
: ^( w1 r" I* o7 U0 hAbstractBackground: 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. 9 Q; d1 A) k; Q
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