Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
3 B; }$ a# R+ M# KNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
1 B$ U1 m. B* z+ Author Affiliations# X, W; M/ g+ p# w7 H4 r& P% c
% u5 l) D- r9 s$ @' l# C6 g/ ^; Y0 R' W1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan / R O# s: r/ D" j. x) \# s2 q
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
4 B$ L# w3 r- ]' U4 M6 _3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / O% P2 S( J! [ G3 P; [5 l
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ; n2 t1 H3 _7 Z+ e- @! ?
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan # n* _( P6 r% A g, }
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan + u2 }; G: z) O* `. `
7Kinki University School of Medicine, Osaka 589-8511, Japan / i( {- F4 A m6 U6 V
8Izumi Municipal Hospital, Osaka 594-0071, Japan & A Y, m9 p/ u, [& ~( _5 l. j2 f
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan # a9 }2 M( a% b* M5 f& c
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
/ s7 k6 T$ M KAbstractBackground: 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. 3 T# Y S; [/ O: y
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