Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
% q6 I, _+ w8 yNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 9 a8 u$ n; c& |- K7 d: X
+ Author Affiliations+ B2 i1 w% x ~6 W% g9 M, c, ]# x2 Q$ x
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan " H& g% z! t1 t6 z; w0 Q6 t
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 w# K' M2 `# P; B) i# u; B
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
' H% }; B; p u; |; x4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
" \# ^" d9 C+ H/ ^( X. a M/ k5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 8 x+ Q2 K! |& U, e
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan [, @4 J1 a! m
7Kinki University School of Medicine, Osaka 589-8511, Japan # @( ]+ e+ \3 S
8Izumi Municipal Hospital, Osaka 594-0071, Japan
# j" }; O" O, _9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan $ M9 i( ?: W1 d& q \
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 S) X' M/ {. d% ~$ i" JAbstractBackground: 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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