Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
8 h# ?$ x* W4 |+ @* V$ sNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 7 Y' Y; O( e e) p
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 3 A& |' T/ B c1 c1 O
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 C9 e* F+ [& w. A6 N* Q' A* @4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
7 J0 D& g/ P+ W) U# K) @5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan " P! F9 `2 k) K/ t i1 B4 ^
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
/ ^5 G; V+ u& ~" @) c, {$ S. P7Kinki University School of Medicine, Osaka 589-8511, Japan
. A- k! w9 p5 S8Izumi Municipal Hospital, Osaka 594-0071, Japan
) S! J- h3 s! }4 @% [9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 0 ]: y$ Y5 W* X+ [% M1 c% `: s
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 8 P$ c8 d! s! z' c
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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