Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type5 p3 w2 N( @ N8 R# F b
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
4 N" ^3 m7 t: B5 O: m+ Author Affiliations& {- b7 b% P3 f
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan \; F, F4 o/ ^
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 `$ f" w7 U4 K- j/ ^. y8 U; s/ w3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
, |3 K8 N2 J6 J" |. q4 f3 g2 a4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan + ^/ f' H1 K: @; |& l \# }& q$ @
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
- X, [- Y- p) X% ^" z" e6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
( H+ M1 e2 n2 Z- I a3 F! V# E7Kinki University School of Medicine, Osaka 589-8511, Japan 2 U, I6 p' l+ U/ {8 Q f
8Izumi Municipal Hospital, Osaka 594-0071, Japan
) ~( k W' s7 Y& G2 p& K7 U9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ' B9 T8 X/ Y" t# k0 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 3 X7 `" Z3 {9 r; Q* c. f- u* s
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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