Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type/ i# C# n' x& U
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ) R) a, b6 x0 \& h
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 7 E. O' o8 P* H, O
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
. a" R0 L! k1 l3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 4 O2 k# X8 I+ m$ V2 U
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
6 m8 q4 @. M R8 W5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
; F; C3 u1 A# ]$ }* I; y6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
: R% n! @9 Z8 u5 Q9 H1 J3 N' u4 k2 Y7Kinki University School of Medicine, Osaka 589-8511, Japan . N% m+ P+ s4 ^/ }, h' ~
8Izumi Municipal Hospital, Osaka 594-0071, Japan % o8 ?& n$ K+ K, n
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan % ^" G" y: h* ?$ x D
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 ; k$ D" m o* y9 e
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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