Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type: a# x0 B9 C+ ~
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
3 l; A1 O6 @1 ~+ x+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan : ^6 C2 x2 L, a2 h
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
( y2 r' `% h% f' k7 J1 q- ?3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
8 e: O- Q* | G# G1 N* H, i" A# a8 f4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan " I8 C; {8 ?$ N! h
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan + f6 S1 A8 V% T: I; Q9 E
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 2 [8 o) k- |9 M2 i( o3 u" c9 p. W
7Kinki University School of Medicine, Osaka 589-8511, Japan 5 H' k% T& ?4 R$ @4 [8 z8 G
8Izumi Municipal Hospital, Osaka 594-0071, Japan 9 J3 P% g4 T- f
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
$ c# C% y6 v! S; [0 P# ~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
, u) S7 C% ]" p" Q6 ?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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