Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
8 D: B' ]0 _" E LNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ! m" x1 h4 M7 } p
+ Author Affiliations
) |/ v- C( I. C6 |# w
. ?# K( |8 c; `4 `; y+ n& F1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
+ a3 w$ D* p b) P1 t2 b" q/ Z J2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 U; p, H# \! ]0 M3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 V# f! T1 i0 C( }3 r4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
' m# R; F7 i7 {" ]5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan * K4 }# k( q8 G' G8 H7 i5 ~% O
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan * M0 q+ ?& I; R; R) {* H! u- X9 x
7Kinki University School of Medicine, Osaka 589-8511, Japan
1 Z d" v2 z, U+ R8Izumi Municipal Hospital, Osaka 594-0071, Japan " V7 ~5 {1 d7 D( z8 d7 p) V
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
6 E% h/ L) z7 r( e0 lCorrespondence 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 ]% }( a0 z5 c5 B0 lAbstractBackground: 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. 0 h7 `$ c8 j6 K4 g7 \+ S
D, H& v- F ^% I$ @ |