Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type \' [( Y3 D& `5 m
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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' `0 ~# ]1 W& L& y1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
- {! B" N( L& N; v2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" v+ ^3 p" T9 h: w& A/ V; A* w0 o6 Z3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
7 N- q+ L0 o' R2 ~( B+ u& O) n4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
2 E6 W8 d/ y# `! y5 P& k3 \0 F( m5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan . l1 F7 \- C/ o
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
. m0 z- i) e6 E8 A; q) |, a; m9 L7Kinki University School of Medicine, Osaka 589-8511, Japan
1 z6 H1 b* K9 N ^- S8Izumi Municipal Hospital, Osaka 594-0071, Japan
/ W+ s+ i3 T) i7 K; Q7 w4 v/ n9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan $ {) Z) _. e v' O. p9 |* J# I5 S
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
. R# R- y$ p8 W2 UAbstractBackground: 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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