Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
* F: y0 Z% R! B4 j1 z, _5 ANOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 & f3 ~' z% S2 Q @' A" Q
+ Author Affiliations( b+ d) D' Y" V* h( N: j" v7 N" _2 [( H
% _' a+ R( U+ C+ D0 x1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
$ j1 j, q% q$ b2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 0 n8 ^/ j$ @+ t" @: t
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 6 b* e/ { @$ m- q6 h2 f6 v
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan $ J$ W" c" \* m8 K' }2 a
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan : l; I' ]7 Q* e, \+ c8 D/ O
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
3 E9 o X* U3 w7Kinki University School of Medicine, Osaka 589-8511, Japan
9 y3 @/ t" Z! }( y+ M' x' r8Izumi Municipal Hospital, Osaka 594-0071, Japan & `' ~4 I; G; M7 J, @" r8 L t; k
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan $ B* `$ t; L6 X* i* q# Y8 J
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 8 e( G' \* R! Y' X; u0 B
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. % R+ @5 d( l0 ] [; u5 ~8 o
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