Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type! F" O# l& m$ l# p% w$ Y* l: |
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 4 p6 g7 w1 a/ y! M$ V3 ?8 \- X
+ Author Affiliations
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6 x3 ~. `' I& \: E% v1 J: h1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
: O. `( e. q! Q8 x6 V2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
0 x5 A; A. e7 R4 A; k3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
. k1 E/ x* I4 b F, J/ {8 c4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan + Q8 j6 m6 M1 p3 j' T# A4 r
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan . g9 i! Z& l: J3 _3 M3 B
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 0 B! }/ \# W2 A# O9 s- l0 B) ]3 q
7Kinki University School of Medicine, Osaka 589-8511, Japan : X% j% \1 G. Z& g- n) S% l6 O
8Izumi Municipal Hospital, Osaka 594-0071, Japan
% L" Q! v3 G9 }6 ^4 y, D9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 7 y7 Q' y, t8 @5 m4 O- 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 3 _) d d( I( e; g9 U) [
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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