Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type# J3 x0 Q0 C* q* n2 S- Y4 P1 l
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 % S& o7 z# E; h! ?5 v! Z2 z
+ Author Affiliations1 f$ l: G+ a4 i m; U# E* c$ b
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
# Y. Y5 |5 t: V: u# K8 c' r' W2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ' Q9 ~ s: q# i( {
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : p" G3 K9 T% W2 Z
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
3 m# o. [0 `, {9 m5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
$ _, E& C2 @; E2 C6 z' B6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
Y; V$ o* {) H& K* _7 J8 U7Kinki University School of Medicine, Osaka 589-8511, Japan 8 }2 U% c2 P* s0 o. ]" H
8Izumi Municipal Hospital, Osaka 594-0071, Japan + K8 h, d/ {# h8 \% f# M+ x: j
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 8 U/ U9 q$ c( o1 ?, ^9 }
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
* E2 K6 U6 ^. v/ C! t6 `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. ! m0 p# |2 b9 I" T" b7 r4 A8 F" r; N
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