Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type- {& p+ A0 s4 N/ I% s
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
5 U, S( `% `$ G4 }* S/ Z+ Author Affiliations& l* q3 V/ Q% g, H7 _/ h5 C) W' m
~$ r% W" ^0 q9 A; P9 y1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 5 E- O4 j! n/ S8 H
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan # o6 }7 |- s E7 h
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
2 l6 }# k3 C, O+ L' Q4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan $ Z, O3 C; W! @- P6 m
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
) l0 _/ {& }/ q1 H q/ W6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
% Z" I6 }; V9 \) N7Kinki University School of Medicine, Osaka 589-8511, Japan 3 K- i+ ?5 `! i6 n: ?) ]
8Izumi Municipal Hospital, Osaka 594-0071, Japan : q4 r7 H+ q' A$ K) W( J
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 8 @- i5 J% i% V
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
4 a' G8 D& f3 ]+ C. g5 rAbstractBackground: 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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