Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
+ i [* A, e5 YNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ( @* B# T& u- H7 a& d! G4 h
+ Author Affiliations3 V4 C" k$ A' n0 y; f
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
4 w& S* @ M- @; N5 Z9 ~: g" o2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
. E" @) y+ R" |# B- @+ u3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
0 N! n* q2 ^2 h0 u5 |7 z! \6 K: B- ]4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan * O8 d4 C3 q9 i4 h$ P( }* \* ]
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ( p1 U* E$ q: ?* P( K- H
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ' j* I$ g7 [* [6 R* Y. T
7Kinki University School of Medicine, Osaka 589-8511, Japan
' ^1 S' B3 M. {2 A" x8Izumi Municipal Hospital, Osaka 594-0071, Japan
4 u( K8 R/ V2 |0 ~# Z% K; N1 _9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan . ?& L4 o) [2 M6 |6 V7 y
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 8 j6 e! Q7 e+ K* W4 {* V$ k
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. 3 m x J( ?/ y. f" L- `- `8 F Y
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