Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
* I) L/ Q2 O8 x8 U: \8 rNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
7 @5 I1 n+ _( b2 Z+ Author Affiliations% S' N& X% V& Z0 c; ~: @4 x2 u* j. N5 a
) z' D( f- r% b2 f# A
1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ) {( o; M' [8 G' ~: I; p
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
% Z9 S1 U1 _& K2 N3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
3 t# r R7 c' a. L4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan l/ h5 U+ r- z$ U# }2 D, U: ]
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan . g/ h! ]8 X" m- l5 b; Z& q6 h
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ( ?0 [7 I3 _1 v( j" z) k
7Kinki University School of Medicine, Osaka 589-8511, Japan 0 L* m) a% a/ n% ] p9 |0 b& I
8Izumi Municipal Hospital, Osaka 594-0071, Japan 2 o P. J, G* s! e* P3 |
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan N2 O) }# _: {8 g+ J
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 1 q# }. x2 v6 W# n7 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. , |# V( Y' I; i* y1 X4 t6 e, d
0 y0 _' L9 R! s6 K; q# t/ v |