Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type! s& q H8 l$ X, Q' W
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
& N, L& E" U8 B4 l3 T3 n6 V+ Author Affiliations& T6 e0 _- J1 i) X
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan / i- d3 j8 W+ O' M9 e) U
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ' H) I+ P/ J3 G
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
! d6 a5 u! B. o' ?4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 0 O8 r3 x; r s2 J: S/ L
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
Y, X P" K( n( X6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ( Q; O. i6 f# w- o, r0 [$ W
7Kinki University School of Medicine, Osaka 589-8511, Japan
8 R9 b+ X& l& U" R n8Izumi Municipal Hospital, Osaka 594-0071, Japan ; z5 f2 L+ A4 _" q: Y
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
! | ^4 \& k2 q% iCorrespondence 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
9 Y" x* d/ u) R! YAbstractBackground: 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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