Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
& U5 K( D% i3 B. B# kNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 7 u U" e1 O# t# f$ z
+ Author Affiliations- B9 ]; }$ a' i6 E) w6 X; H% ?5 j
: i7 I" R9 o* x1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
7 _7 ~& n* V/ d1 C2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
m; V2 r% n ?3 B1 \) I% l& _3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 6 b3 d% S' g) n
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
0 _; t1 c7 S" e4 b+ ^5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ' [' ^+ q, Q' d& g7 f, M
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
: E2 n/ o; i, w+ z' ^! `. n) O5 b7Kinki University School of Medicine, Osaka 589-8511, Japan - P! ] }) O$ w+ F, x1 b6 z- q
8Izumi Municipal Hospital, Osaka 594-0071, Japan
N( ?: c ]/ f: H, a/ z$ y% K1 Z# |9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
3 t, t U/ y( m1 r' V$ b! _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 9 z% q- }% h& B# E2 I5 f& M
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. 5 {* L2 p! Q2 C- m' k# k C" U' ?
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