Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type) c( ~2 |' j6 M
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ; w( s: p/ I9 h& x: I( B
+ Author Affiliations$ h, k( u" A c* ^$ z l
8 p# R& }6 W1 i3 _7 l& I4 e4 _1 C: y1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
1 W& s. o4 {/ J8 H- `, x f' {2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
7 G7 w1 {# d- F3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
' j$ ^2 A$ Z) g/ n$ }8 K' U; _2 ^4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
; \* F/ b+ e. j: O! j# P5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 9 V, t( E3 n3 T- _ j; |
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ! K1 S$ B$ v. Z9 k+ G$ Q9 L! A
7Kinki University School of Medicine, Osaka 589-8511, Japan
1 q" ^% T% h7 X' m% k8Izumi Municipal Hospital, Osaka 594-0071, Japan
5 V% O% {& W# |) n+ M7 @9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
9 v1 C$ H1 s- b8 [& PCorrespondence 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
3 `% h% Q; K7 b! h2 i- B* LAbstractBackground: 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. 8 |: d0 @* j) i5 x+ P; R/ |* q5 N& v; C
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