Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
$ P4 H( Q4 O5 U5 I( u/ A. MNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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* t- c4 `+ h2 g- V, f1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 7 X! C& G8 G: S5 O" k6 o9 y' L# D1 T
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
. ^* `) D& h8 v) w4 L0 |3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 6 A$ ]4 v0 z, r
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
" o' m9 V9 ?7 ~- s% d/ B5 J+ o5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan # M9 U; R1 v% [
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan / M; j9 M" J0 Z& o( t7 v3 i+ h9 Q
7Kinki University School of Medicine, Osaka 589-8511, Japan ' A8 |( }8 z! `$ ]. ~6 G
8Izumi Municipal Hospital, Osaka 594-0071, Japan
# A% D7 {$ [: d5 l' H' d9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan . ^" b1 i- _4 v% u
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
o& |: K7 t4 x6 N: `$ WAbstractBackground: 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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