Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
' K# m) \/ g4 x! {6 \NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ) \2 P: `9 U3 ?1 m0 {
+ Author Affiliations+ ?2 C1 [8 f+ P9 M" v
) b# q" U1 Q: u( {1 r3 h1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ' K. b* ]9 C( e0 a( ~
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
# X( K. E$ h; M: z3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 2 b- }3 F$ {6 P
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 1 ~9 b- }/ \3 Q, l$ E7 Z, t5 F
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan . P' w4 A% T$ I. u
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
x0 c$ Y; B3 A0 I1 U! h7Kinki University School of Medicine, Osaka 589-8511, Japan
0 U9 N7 b3 ], V# p8Izumi Municipal Hospital, Osaka 594-0071, Japan
; ^" M& s8 ]# S P8 f9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
0 i7 l! j! s& ~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
" M a& h( g7 v7 a' r$ IAbstractBackground: 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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