Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type4 @9 w( ~" }. X8 T4 w
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
. E# u% A+ K& @. d+ Author Affiliations
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* e3 ]" q2 j' Q/ R& |1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
' N) {( V# A3 C# I- T2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 O! h6 e$ ^" j g, n* }1 E3 ?# f5 h3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 7 z1 w2 ]$ w! ]
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 6 |( M/ \# p1 b
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan : D; D! [9 l( v, t" _6 p$ _: _! V' A
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan , w% y* C+ v4 W! h( z4 K D( L
7Kinki University School of Medicine, Osaka 589-8511, Japan
& u% u7 Y+ o# ]6 z( {8Izumi Municipal Hospital, Osaka 594-0071, Japan # _0 F, j& G, ?# G0 j" R
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 3 k# n) d" U* d0 y- E$ v
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 . f) U/ c# a- d; r9 t: J
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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