Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
1 i+ S0 G' j$ Y: t$ lNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 $ w; y6 p* w" j3 n1 ^! g. B
+ Author Affiliations3 N1 ?% d, M# {, j# Q* U
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
: ]* N) J) X$ S2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
2 Y; @6 S: q% Y. X/ D2 \3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
# {5 j+ l8 |' C" z2 ~; D3 n; `& o, L4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
3 C& A& E9 x( }5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ! }- B U/ s: Y2 f4 w8 ^; @3 X+ _% H2 Y
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 8 A# D1 y* K& X6 C+ e2 E% X
7Kinki University School of Medicine, Osaka 589-8511, Japan
4 ]3 u0 @ H5 h( C s( L/ c8Izumi Municipal Hospital, Osaka 594-0071, Japan + Y7 H3 H6 e3 {# v L% Q
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
% P- s- G* E' C2 I! bCorrespondence 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 & p( j2 o3 v! N
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. " P, M$ K R9 ~8 p8 l) m
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