Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type" ]9 V: |9 ~* ?4 \* i
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 , |0 g7 F$ F% f. k6 X
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 3 _/ A; r# a7 j6 Z; P
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
7 \% P" z5 _, c R3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 1 f( f/ T+ a; P) [9 M X! [
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
; P6 V+ e9 ^2 ?( r6 c f# |. y5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan / v" b3 m2 y& {/ Q, Y7 t) u
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan # h* ^6 ^5 v; K) [
7Kinki University School of Medicine, Osaka 589-8511, Japan ^$ C, \, j/ {; ~# B; u
8Izumi Municipal Hospital, Osaka 594-0071, Japan + w. }+ I: h) ~: W* {8 N
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
. n, v0 R* ]; t4 }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
! t% |! a' g& |5 v* d" T: y Y0 ~5 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.
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