Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( M+ J( T. B6 d b2 \% P
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 1 b6 a6 ^, O& I2 I5 U
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 9 A5 F' Q- m% m5 P$ V- H% k
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
7 o# }1 F- f; u3 M% `5 `* B3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan , N; v4 v, }! }" U9 k9 \/ y
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan & T5 V5 O' N6 S' }
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
, B3 R/ z- K+ p6 e) s6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 9 c6 S/ J" m, u4 D: N
7Kinki University School of Medicine, Osaka 589-8511, Japan
4 t3 c5 c7 Q7 h0 t. U' L8Izumi Municipal Hospital, Osaka 594-0071, Japan
/ O+ \& j+ L( N0 l( v: m2 z8 e9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 9 \/ {" M6 O5 X ?! {
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 * g% f& R( G8 H
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.
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