Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type4 a, Y# U! j/ u7 A' j' P
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 3 D+ p* g8 A, E. `& z
+ Author Affiliations4 A7 [" b( u1 i3 B4 J
0 G8 e* G2 ^9 m1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan # ?: B+ F8 Z9 C4 }$ F" B
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
3 `7 {8 {6 j" N3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 2 i8 i/ _; }6 J# N2 I" ~
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
" Z0 P. M9 P0 N5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
! L- I0 l* y8 b6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 4 N% H7 H7 t" r6 l. p4 ^! U
7Kinki University School of Medicine, Osaka 589-8511, Japan
5 m, |, F ?6 n/ C5 G2 f8Izumi Municipal Hospital, Osaka 594-0071, Japan
! L4 E) i4 y. f; i# u; @2 p9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 1 Y B; O% u6 Z7 C* f
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 ) ~; }) x A" v) w7 @0 ]
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. ' i- x. {& ~: `
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