Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type# F) K* {* }9 M" ?% S
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
3 o- _5 Y9 Y. s' C/ c3 H+ Author Affiliations9 }7 B, K$ r$ p
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ' z% K4 l: x; p/ M
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan " h4 H& h/ c6 {8 y; z) I7 }; w8 V
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
4 w: F Z2 o6 b1 i! r4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
" a/ v: M5 I7 x/ ~5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
' A5 r) `1 u6 q6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan Q# x& Z. T- S) I6 q0 j/ n0 }/ ^2 H
7Kinki University School of Medicine, Osaka 589-8511, Japan , |; k( T1 a7 V, m4 d, W' l
8Izumi Municipal Hospital, Osaka 594-0071, Japan
; y0 ?+ K. f, p9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
8 Y3 x9 X, D$ z" @! G. DCorrespondence 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 : w! \$ b! ?5 y/ n$ s1 T+ c
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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