Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
5 a% ~" F* x1 r4 n M9 u% GNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
9 p, X& B5 z( Z1 q4 y+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan $ ] I: g# n# G0 U4 X/ e1 x& b9 |8 D
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" C0 I+ l/ Z2 D% [- i3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
& c7 C% T0 S& G' A$ Z3 l" O T4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
( e; W' E; W& k+ p9 n& |# M$ j0 O5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
- x5 {% Q# P+ A( r A6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
- w6 _( Y& F3 z7Kinki University School of Medicine, Osaka 589-8511, Japan
+ U! G3 X% e4 n" _5 v: {8Izumi Municipal Hospital, Osaka 594-0071, Japan
/ V: Q0 ?" B5 d* i3 A9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 9 W: c5 U0 Q) c3 Z, h. t8 Y/ o
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 0 Y& M4 [& U5 m! f
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. 5 u5 n: |8 ?0 |. h) w0 y: F* Y; ~6 W2 L
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