Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type' t) ` `/ D# o/ Q
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
8 \' A; @" d$ n7 W+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
7 r( B2 e; \/ a2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ( U) N9 M. ^5 I
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 K% }# z3 Q P/ F4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan . G" g8 [2 U" g: w P
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
$ |* P x% w% j& f! o/ ]5 l6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
1 c* c! g- R- Q9 n" o7Kinki University School of Medicine, Osaka 589-8511, Japan
8 g; s6 D% a4 B% t2 Z8 R8Izumi Municipal Hospital, Osaka 594-0071, Japan ' f6 d) I% A8 U7 ]
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
+ D0 b1 ^" j& E' @* ?9 P) K; HCorrespondence 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
: L4 s$ j* p, z0 I6 I$ KAbstractBackground: 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. ) G4 o/ U1 d' u0 h
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