Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type. }$ Q) b9 |0 P9 p6 {
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
5 u9 b# o( G/ X$ ]) O, t" ]; t+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
- I4 J4 u1 {- J2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
) B( D$ @# e/ s; y/ P6 \5 R3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
( w M5 `* W2 [4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ! c& {9 h/ c; o9 p; U; \& a, L
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan : x3 S$ K4 A' O
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
! `) a b+ _; ?5 [, l, \7Kinki University School of Medicine, Osaka 589-8511, Japan 9 u3 D/ g2 P1 P5 B2 S* P
8Izumi Municipal Hospital, Osaka 594-0071, Japan . s C* |, t. Z9 _' s2 ~& Q1 Y
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
% @. P* l8 A# Q$ eCorrespondence 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
' @) D3 p5 F7 O( j z( OAbstractBackground: 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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