Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type: ?$ N1 c" ^* a. k" m
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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7 N) E+ W2 F6 {7 [6 s" `, e+ l$ C1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 5 l f; O2 ~% L
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
: `0 e G( D' k8 _$ u5 n3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
( @, _2 ~! [5 t t# W4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
! j+ R7 K6 t$ K5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan {* W* ]. B0 g ? l" X# j
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 7 H, q1 j4 u, y+ l% S1 m; o; ?4 r0 Z
7Kinki University School of Medicine, Osaka 589-8511, Japan : q2 }$ [, _$ `: [* A
8Izumi Municipal Hospital, Osaka 594-0071, Japan , |$ k# h7 W; z8 } r& y
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
/ C# y9 M3 m4 \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 F" j% s1 ~% n4 A3 I1 C) m8 \. WAbstractBackground: 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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