Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type+ X+ l8 r5 s1 f O+ T( Q2 y6 J
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
4 r, b% j: S2 {+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
. G6 k" B. T: @) C& L2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 E% S/ L& d! Y; E. ^4 o& d: M# B
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % m. d$ F5 j6 M* D- U
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
& n* s* u9 R( T% A8 L- a2 x/ ^5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
7 T, X* G6 o M4 z3 H! d/ z6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 8 K! y1 h) x: ] v3 M- {$ Y
7Kinki University School of Medicine, Osaka 589-8511, Japan $ p! ?% e; |* |( m; \& o
8Izumi Municipal Hospital, Osaka 594-0071, Japan
* I$ V+ b' }' U2 q' W9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
! Z4 u' A/ l2 J4 i! bCorrespondence 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 ) _. l: y5 ^( g r( k1 ?! y% T
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. 9 k& I1 L5 h+ N4 F# Z: D1 ~0 f9 E" t* N
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