Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type2 b; n V2 ~; m7 [7 `
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 9 z3 Z0 Z0 i E) B/ ]4 U/ o
+ Author Affiliations" h$ B' a9 Z! \
8 T D6 O. @# }# B2 N& ^# ]1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan - A: D! |# l. _
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ( f/ s* l! c5 U/ t/ A# j5 e0 q
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
7 s( ~" x1 `( o# e4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan $ v' h; B+ `" H7 H$ d
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan : |; [* t+ i: x& Q* N8 e C
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ( i; [3 b- v2 k9 [& {- O
7Kinki University School of Medicine, Osaka 589-8511, Japan - W+ g1 G3 l E0 R3 ]
8Izumi Municipal Hospital, Osaka 594-0071, Japan
& e7 d' X7 E" F9 R2 E+ W9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
% ?5 K8 Q, {& u( o v: I) l& JCorrespondence 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
, S+ I5 j# f0 q# o! h. u' I! qAbstractBackground: 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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