Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type, M4 o5 |. a# M! E& I
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
0 b: @$ ?% q D+ H& o! N+ Author Affiliations. p8 [- _3 k+ ]' y1 E
9 Z1 o: ?3 e c1 B; p" p1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
8 _* y4 i; M! p# D; o2 ^2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % D9 J* f7 e4 Z0 M. o. E# d9 z
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
% C# h. X1 d9 Z2 ?! b4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan : [/ C3 J, a! X9 @0 p
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
& l" q/ C+ \! y. W, b% P' P6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 5 Y) x! v. @* G/ X1 p
7Kinki University School of Medicine, Osaka 589-8511, Japan , @+ q/ j/ F7 S* j$ u
8Izumi Municipal Hospital, Osaka 594-0071, Japan " E& q# Z( N6 A
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
5 S' @- D8 W# f! c' Y( wCorrespondence 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
/ Z7 q' _, P3 G6 q6 y& K. V. n1 |* r# \5 vAbstractBackground: 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. 4 K$ w# O- O( @
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