Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
$ l5 _, E" P" m$ eNOBUYUKI 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 $ [4 K# |7 a( y; B
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
4 Q* X) F1 N" z; M% t3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan & W8 ^. f. @7 C& \2 }6 m2 b a
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan # e) T8 w+ M2 O9 d" W
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
# a* K' ]5 b) X: q! c. ^& F6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
/ I9 d. j% f+ L7Kinki University School of Medicine, Osaka 589-8511, Japan ! ^3 E6 }: b: l
8Izumi Municipal Hospital, Osaka 594-0071, Japan
1 t9 K' h- i1 ]: R. E5 }9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 7 ^+ g- X' q4 g. ?) k
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 ) q& j6 Y2 C) 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. ! i& ?" A# `" {! d7 z% `2 W
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