Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
0 k! |0 o& e8 S2 q3 u1 [5 ]NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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: | `; ?3 [. E- D- l# x1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
: @6 _7 X& ~" Z0 a2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" w5 m& m8 U# _3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 7 I U, W" @( `1 \
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan - x4 d0 s& f2 C+ O6 N" T7 P% u6 M
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan * v- ?( W* I1 r; O( M w# G
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ; b+ K* w# p' A7 x
7Kinki University School of Medicine, Osaka 589-8511, Japan
# `6 `' N1 q5 w3 Z# u& X |; r) w8 M8Izumi Municipal Hospital, Osaka 594-0071, Japan
; B# \' d. n5 X m# H9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ! I/ [- m1 p# U4 w1 P) b. Y
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 A4 I, I5 C+ X: b4 X1 l* t, a$ 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.
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