Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type1 a. I* R2 r3 ` l7 M# J
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
8 s2 B3 E2 U; r n' j2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan , ~8 U7 L* q- ~- |$ O" D: z
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan " J& W3 Z: m- ]
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
* y7 S% @: D0 U7 n) y4 L5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
$ [$ s7 R# ~! H: J4 U6 Z6 _6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ! J: A$ ~5 G! Q d
7Kinki University School of Medicine, Osaka 589-8511, Japan
' z' A# f) f/ c v( i/ R/ ]0 X8 k8Izumi Municipal Hospital, Osaka 594-0071, Japan & C) ~# S* {' R
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan - d. ?% l( S7 r5 N2 v% x& |- m3 ]
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 z2 N, E! `2 s- t; u3 z
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. # N y- q5 J7 O0 D6 P) A! ?- c
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