Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type4 _: S6 }2 r: e, F: Y8 m
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ( a3 p! \; j, w. }! B
+ Author Affiliations# H$ p: \+ w5 _6 n' k
: S8 \+ S1 d, O* `1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan & m" o2 N- ^0 y7 f! e4 u. u2 D& L
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 3 O+ }0 t R1 r
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan " K- o( p7 G" a2 D( ]
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
. l! y6 i! M ~3 U5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
+ L# V' C+ j9 o6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 8 h1 D! X1 r/ h
7Kinki University School of Medicine, Osaka 589-8511, Japan ! o2 I! b8 q7 R+ N3 {" r9 B5 D
8Izumi Municipal Hospital, Osaka 594-0071, Japan * ]$ d: i. T" [' w5 X: L# |& g) P
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
2 f% P. c/ O- S" h8 E3 fCorrespondence 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
: t" S6 p3 _+ ]2 A9 s+ WAbstractBackground: 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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