Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type9 p/ r" M7 a( b8 L5 P+ {" q
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 + U# n8 u* X8 h; b
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan * M: C' R S( E! ], H% R! a
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 7 m5 u/ b+ ^5 _% k' b
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
$ E! B }& \/ N8 ~4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
9 O, v" E; ^/ B, o8 d3 Y( }6 ?% t* n5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan # J# g$ |: C- J! O8 h" q. X8 x! @
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
1 s' R$ m& v3 p% g7Kinki University School of Medicine, Osaka 589-8511, Japan
+ a9 Q# v" V ^9 R% Y8Izumi Municipal Hospital, Osaka 594-0071, Japan
, A0 s& y# I5 x, [9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
5 @0 I2 z1 Y" `0 s; T( mCorrespondence 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 7 A- \+ X5 A# \; f$ 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. . H- P9 f$ B6 ?3 [
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