Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type t5 r/ ^' i4 J
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 3 p4 C J* e! J+ x0 e
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
, S- E, F& p) z/ v' v2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
t* }5 U3 X0 [5 R a, i p: q0 B3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 6 b9 {. q7 ~) \8 _- N- _3 h
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
9 Y0 L0 m! l! y# K0 Q d, x7 }5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan + Z4 r' p! t- ~; A! `
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 4 g5 h3 W$ V( l
7Kinki University School of Medicine, Osaka 589-8511, Japan - D* h8 Q2 Z( T$ r0 Y) k* Y
8Izumi Municipal Hospital, Osaka 594-0071, Japan ! u" j G5 }" l: p( w0 b
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
% S6 [: Z0 ~+ U- {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 ) [; n! @' |# D$ Z% Q0 e4 d
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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