Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type2 L. r6 K; q& F
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 * {# `! o$ g! w% A9 v8 |' X
+ Author Affiliations3 g- H& H6 n; j
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ! n! B- }! t' H; ^
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" ]3 @4 E% r2 k3 M" p7 E3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
! \% U, t4 P: W5 Q- a5 {7 z4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 9 ?# r% W1 q$ t I
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
7 s v# F+ S. x5 n, z' u& P% y6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
+ k1 C$ x" T1 h7Kinki University School of Medicine, Osaka 589-8511, Japan 5 e2 P5 |8 h; `1 \/ F7 s) c
8Izumi Municipal Hospital, Osaka 594-0071, Japan & m+ `1 \) f: w8 y q
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
7 E; g& O( d, T- s \' a" L. TCorrespondence 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
4 V. }8 p( V/ {( V4 BAbstractBackground: 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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