Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type& p7 [7 t8 }; a$ _
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 : @' T, S, o$ r# I' G) I
+ Author Affiliations% {7 g; B' R0 k3 L+ W1 z; d
! ?# U0 W" ?. B" `0 d1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan \( Z% L8 x9 t: u: W( A: h
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
2 s% J) h. D) t1 F2 T3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan & K& b; U0 ~! X" d0 l
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan $ g9 H7 g b) Z# i, T/ V8 L$ P. X
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 1 b Q4 ~ K( I) Q
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
3 w. K# T) ~& [$ d0 _0 ^: i0 F7Kinki University School of Medicine, Osaka 589-8511, Japan & D; G) R Y8 q" p0 n& r1 N6 k
8Izumi Municipal Hospital, Osaka 594-0071, Japan
) H. N/ D/ ~) p( a1 g9 I1 y: S9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 2 |" d- Z( L/ Z1 O# P& Y/ o$ {
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 ' J! n3 K9 h' k# r( c
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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