Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
6 u; J0 p# F1 WNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
; b( m7 c* c9 i+ Author Affiliations- u* f" t6 `& l4 g) \ B7 h, V" B0 J
( m/ u, q) \% D, |1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
8 Q6 u7 ~' M; f8 I: Y# a2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 ?% }7 R9 T+ }; x( }" C6 s; [
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
$ z m' J9 B4 X" j/ [4 F4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
. R3 b: Y& z9 s% j5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
6 s% l5 h% u: F# s; M% {6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
/ K7 S @5 Z! I4 F( H7Kinki University School of Medicine, Osaka 589-8511, Japan " L1 D+ m M" S
8Izumi Municipal Hospital, Osaka 594-0071, Japan
& @ D" ^$ ^8 g3 [( l' |8 M9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 5 z2 c& i Z5 H9 r
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 - d$ L/ y) | m) B0 A6 [/ o; \: W
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. 2 I) I5 W, V9 r+ x' ^
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