Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type+ K* w1 v$ }9 j* a5 o P1 E# c4 v
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 * u$ R5 z* m( ^$ R. l. ]0 \( K/ W
+ Author Affiliations
5 F7 V" Q* S- }/ b3 | h% F) J
1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
8 ]+ L9 b% ~1 I& j% M' m8 ^& j" v% y2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ' Z, U9 w$ }/ F' j& f
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ! i$ A- m5 }* }% x a9 A
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ! i1 I" }5 q, ^- f+ N+ m
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
7 c9 L1 A' \1 l8 _ W9 E& v2 W6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
, N8 g1 z' ]( x, `2 v4 h7Kinki University School of Medicine, Osaka 589-8511, Japan # W3 O5 x% x1 V! a; t
8Izumi Municipal Hospital, Osaka 594-0071, Japan - z2 l4 o9 D8 A" ~2 m
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 6 \" N2 n$ f# \% z9 {
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
/ [! b6 P4 T. X+ B" D& w( l5 e5 BAbstractBackground: 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. ! i5 d) b, m0 E! @5 ]! O4 j
/ N% U. {0 }# H' V# x+ _2 k$ V |