Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
4 d2 z3 q; h+ J) H1 CNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
1 M% N& k5 q+ [# d2 w: I# H. r+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan # a$ s+ G$ V& p8 F( i3 I u
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
6 J5 y% `, ~2 T3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan + h, K/ Z& S% b( g
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan $ D: y l l7 `5 O$ T
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 8 I2 h c8 p2 _: d0 _; A
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
- b* c' f" m" S; k- d! a4 h7Kinki University School of Medicine, Osaka 589-8511, Japan
, w$ l' [: r2 F6 w- g0 ?8Izumi Municipal Hospital, Osaka 594-0071, Japan 6 m7 _8 ]7 d/ D7 B5 D s9 `% }
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 3 e- Z: ]: O3 }: m
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
4 G) F# d/ c; L4 bAbstractBackground: 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 I+ f$ `! X1 @* U+ s( @
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