Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
3 H, w# [. D* \NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 1 i. v# V7 L0 @5 s
+ Author Affiliations
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8 I0 y3 t* f6 f @" s [/ o/ M% s1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
& {1 J# F d, @+ l7 ]7 C' g7 L. s2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
; M0 M& C- W! ^$ l3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 1 H3 I! s( K1 m1 ?7 L( o
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 3 r( W% j- {8 F1 I1 X0 c& m
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan . f$ D, `# A0 m0 E' g
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
9 c0 h3 p8 }7 B& O7Kinki University School of Medicine, Osaka 589-8511, Japan
5 z7 ~7 r- |: o8Izumi Municipal Hospital, Osaka 594-0071, Japan 8 T2 t0 R! V2 i4 m
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ( v9 d8 J/ A! W
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 : p5 ?; J p0 }+ ^6 R% p( x
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.
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