Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type9 M+ F6 K& r: V% u5 {
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 2 F- ^% [3 _3 Y+ O2 D% U! P5 @ B) e
+ Author Affiliations' ] r6 O7 B2 ~; x
% ~* p9 t: h; y$ |+ ?6 v1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
' y$ r" Z0 n$ R+ S$ G+ V2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan . F% z' ^9 |8 N, S( i6 F
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
3 c2 K1 ] _% f0 c0 u4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
$ c" z' p3 \- }$ H9 B# ^5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
( T& t2 D! Q5 i4 e8 ~; O- |6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
1 R. e5 g) q8 k: j6 `7Kinki University School of Medicine, Osaka 589-8511, Japan # j, o, D" K3 A @! _
8Izumi Municipal Hospital, Osaka 594-0071, Japan ! q I5 I* {/ D6 j" O, u# a. e3 l
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
) m. G$ j2 E) sCorrespondence 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 ( D! O6 ~# Y9 [3 a9 {8 e
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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