Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
1 P/ r0 l7 [5 Z( J6 e9 ONOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 4 g6 n$ Z9 j2 L2 ` n% ~0 {
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
0 d7 a% X3 E ~+ E2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
3 Q9 Q5 S; m$ y% L3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
% ]0 k. x4 q: t' Z4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
0 Y4 d* d% `0 C& W* d5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
' e) g# ], g4 P# n( a6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 1 c0 B' Q6 _6 \0 ]3 j1 u) _' c' v, S
7Kinki University School of Medicine, Osaka 589-8511, Japan / @2 K& ]' b8 k6 e7 P
8Izumi Municipal Hospital, Osaka 594-0071, Japan ; v- }9 _& S5 a
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 3 Q" @, t# ]( P; i- F
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 8 g( d {2 S; _# I
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. # d# @7 {6 W- ]- g# J
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