Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type2 {, G1 r4 x, n8 L& U1 A! Y0 j
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ( V$ N7 Q" @7 j& S Y7 W7 Z. R
+ Author Affiliations
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" b5 E% \6 I! B2 X) H) |6 q3 T7 a/ [1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
2 N9 n, r- H* y8 f1 Y/ f2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
' s A! x4 F0 a3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 1 A. Z+ N ^1 D5 j( ? u
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 1 J1 h3 N4 v' _4 Z$ C
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
. J3 X( n1 N( m+ ^1 b' N: P5 ~6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan % i& n) O) B4 k9 q. X, ?, Q
7Kinki University School of Medicine, Osaka 589-8511, Japan * X' r2 w8 N) @* N; ?9 f. C r. U
8Izumi Municipal Hospital, Osaka 594-0071, Japan
* _9 {* f# m5 L9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
8 A* w, e& v W8 w1 F w6 w# KCorrespondence 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 ?5 u. i4 B! y; VAbstractBackground: 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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