Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
& Y- O$ W2 A4 B" ^4 H/ qNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ; B" E) E) R9 a( ]& d6 o
+ Author Affiliations* G ?1 S1 w' S1 `4 ?$ W( k6 E
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 8 R/ c9 H, D( ?0 ?. g2 i' l
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ! f- o: e; Q9 ]* x' `% v
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
1 J* ?) q( B0 c2 X( V6 b! I4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ' r" ^3 @% K9 `+ ?
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ) W6 ?% T/ E# X4 C
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
2 r& k- P s3 s7Kinki University School of Medicine, Osaka 589-8511, Japan 6 c, P- N9 B5 H1 E' v5 F3 |
8Izumi Municipal Hospital, Osaka 594-0071, Japan 8 h2 M }; {7 j7 e* o6 I6 `2 V
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ' T6 N, K# i9 U& M! n5 q8 v$ [
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 : I( e3 m7 f, [
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.
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