Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
4 x. K$ M: W; W! l+ c. uNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
' ?6 I5 B3 n. A9 Z7 P+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
h4 ` E0 k( J7 K8 d2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 1 q; }0 p/ Z/ h8 P% e
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan - a i" @) h1 w& x7 D
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
K. k8 A4 G& r! [0 l4 I& W6 L5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
5 H- O4 Z4 h9 ?! r7 _6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
& b6 R7 X& S' d& r9 O5 B7Kinki University School of Medicine, Osaka 589-8511, Japan
; `$ w/ S$ g7 q4 a8Izumi Municipal Hospital, Osaka 594-0071, Japan
2 m+ w- ]2 J% h6 k9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan & s6 ~7 [- q+ y" o2 z* \& P2 T
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
- ^4 A, O2 [- N. [1 n, S/ EAbstractBackground: 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 S% Q* i8 i- q, ^; s" Z
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