Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
2 e% ^! k( U/ M. CNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 : F+ d7 ^, L# d; d7 |" P
+ Author Affiliations1 x* I; o5 O) _9 _0 O2 T
& a3 q) i6 y) s( g& L( o0 O1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan . k( o9 @# U; T0 g! m$ `0 y( N: Q
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" J% G2 o: f F, j0 S3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : T+ M% {# t" {6 v9 n" s0 T1 F9 x# D
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ! A* t) v% F& R: A8 k# y0 l
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ! t- B, w$ V* ~% Z* d1 o- v; N
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan " \2 s& ~- Y) N6 O
7Kinki University School of Medicine, Osaka 589-8511, Japan
% Y% D1 X e, G+ ~- g4 Z. r, \8Izumi Municipal Hospital, Osaka 594-0071, Japan
! V* L- q: n" F7 B9 a+ U+ |6 V' H9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan . \6 D& R7 b2 E) @1 e
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 . A$ E" ?2 O9 H7 @0 A$ E1 B
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. 7 k$ e) D7 i4 y- H2 |8 |( ^
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