Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
) x$ X' g- B. \$ y5 q; Y) lNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ; G, R# I6 l0 A" Y4 R0 j+ b
+ Author Affiliations8 V+ d# Z# D$ |# {6 m* G
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan " z( Q8 K; r; S7 _' P3 U- l" I& u2 `# x
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
0 z) u% ?; H7 z" n2 i( E3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 F( ?& W2 X2 F1 {7 _6 i' b2 ^, d4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
" F/ f3 h% z4 n: E/ k5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
; o/ ?9 w" Z9 H: g; r0 b6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ( h# x. C! p7 `# r/ |9 p% v
7Kinki University School of Medicine, Osaka 589-8511, Japan
1 ~( x6 }% G4 l, X& ]4 H- D) t7 G8Izumi Municipal Hospital, Osaka 594-0071, Japan / _, m" v1 J( V- u4 i0 k4 O
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan & `9 Q$ |$ G1 U( ~$ C- P3 J' x
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
" U5 _9 Q2 Y, Y9 o/ CAbstractBackground: 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. + a' M- s) ]1 Z( b% e
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