Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
4 }' b( q- C! \. v; O9 hNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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4 j z, e9 y, R1 q7 k( J1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
" W$ ?2 X; E: f1 V2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
$ V4 V+ g- q9 |) o) H# t" M0 ]+ h ]3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan , j6 B4 n6 Y# z
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 2 B8 e+ J. M c# w* _
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
+ N) Z* O6 r$ _3 G( p7 z) z6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 5 u, S& s: s2 _! w8 G5 A
7Kinki University School of Medicine, Osaka 589-8511, Japan
0 @5 Y" C" c3 M9 I$ V2 k8Izumi Municipal Hospital, Osaka 594-0071, Japan 0 X2 W, ?$ F/ N) m' @
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ' z0 m9 T; i/ O3 Y4 ^/ I
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 $ _; I" v5 V) \7 G
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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