Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
7 R/ C( \+ C$ g# ]NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan " N2 N6 j. z5 w! Y( b! `
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
6 A7 }# y2 z' Y0 i3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 3 r+ }9 g8 q A6 F9 m% Z6 ?: p
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 0 `: p1 y, N2 E. H" a, ~8 X
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan * Q+ T* X0 d/ p& r
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
" f, s$ q9 G& p+ h: i m% _7Kinki University School of Medicine, Osaka 589-8511, Japan
% F" z2 \1 @: J/ U8Izumi Municipal Hospital, Osaka 594-0071, Japan
$ Q9 B/ R7 N' w) v- Y7 _1 R4 |9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 7 Y. t4 q; Y( S8 [/ ~4 c! n
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 v8 X* a7 _, n
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. / U7 B3 J6 a* D! ^
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