Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type% h9 c; v$ J1 C) \; l; I
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
8 `1 b- \; C# W! X7 a% @, [ x3 r) l+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
3 g/ S* l" S1 g# p3 g2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
! Y* k( u/ a. v* T" a# A8 d' Y3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan " g; v! a9 \7 a
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan " v5 N1 ^# V/ w1 f' L. K: W
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 5 `! O" h7 e2 k$ u! m1 R7 O( \0 b
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan - X: w. q! s; K
7Kinki University School of Medicine, Osaka 589-8511, Japan
! ~2 Z* x8 d# b8Izumi Municipal Hospital, Osaka 594-0071, Japan
% G! G6 C ~, O9 o1 |2 W9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 7 b Z' R E6 U c Y9 A& B
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
' ~7 C. I, N4 q0 zAbstractBackground: 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. / ?1 i3 }2 _# ?
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