Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type$ q/ {4 E' S; c }
NOBUYUKI 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 2 q. }4 y4 P, N' X2 P+ g
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
/ B/ ^8 j, d/ F1 \3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
) t$ }2 _6 M; q1 G; K( ?6 d, y4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan # C- ? j) h' p6 B' d. q
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan & N3 I: E! { b6 a. G. u& V
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
7 I/ q2 _' X2 X7Kinki University School of Medicine, Osaka 589-8511, Japan
+ }3 i* L! T. D% O8Izumi Municipal Hospital, Osaka 594-0071, Japan / N" `! z* R( W- x& ], T' D" }
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
/ `7 y: g& v6 }3 N" c" Y7 g1 MCorrespondence 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 0 c& w. k1 f# {7 C9 I+ w6 O
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. 7 Z, Z+ c6 A7 Y8 N2 A2 ?
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