Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
( O/ |& O0 o5 ?5 `- R' \NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 5 {, j' }0 M: G' |
+ Author Affiliations6 [6 d9 [& W/ e! n
3 a2 i; I! ]. G- F1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ; }$ K; m: V! X& x# s# a, X p
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 8 L- p6 u: {1 k3 A% O' }5 H5 m
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
1 `# m5 a& b! g- g9 Q4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ' o6 f* }9 ?3 J2 f" k5 k/ H4 t
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan * O9 f- S# j7 W2 e/ _8 d
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 5 h/ c4 A2 g, |9 E8 x+ Z* X
7Kinki University School of Medicine, Osaka 589-8511, Japan
! [/ d2 j+ H; y" i& E0 `8 q8Izumi Municipal Hospital, Osaka 594-0071, Japan 5 X. W" R8 V8 A) `* t& m. o( T2 h
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan . l% @& T/ p* }9 g: t! Z. h6 ^
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 * L* k0 w9 p4 @4 o3 ?' J; m$ G
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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