Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type$ ~, s* ~/ K; s! {
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
) D& h* I, y' C4 x4 r+ Author Affiliations! F& H* b% J! i7 X% n
$ I! M* N8 }3 {% Q: i! n |6 c1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
8 ~, A/ K& W! {, n0 I" h7 l2 o' _2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
/ D, [ [) n/ n* B3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
J K! E3 j" _- U( r6 O4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan . r5 ^+ \9 O, F5 \- g' g& L
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
. f& x! m# p( V+ W" `) O6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan " B+ }# p* \# \& H6 E5 V! K
7Kinki University School of Medicine, Osaka 589-8511, Japan ! H" L. r3 \4 F% T" F% v7 }1 v! K
8Izumi Municipal Hospital, Osaka 594-0071, Japan 5 }& e" G- Y- h, T
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
2 _5 x2 a$ B Q- z+ P, U* p! o* ZCorrespondence 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
9 M3 T' O' I* f4 fAbstractBackground: 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. + o* |2 ?8 G/ I: |
& y$ R* I( P/ w6 x9 i |