Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type% u1 s7 Z* x% {
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
@3 B- G0 h8 d/ y+ Author Affiliations
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$ G3 h' E7 |8 g: R) y. I( B1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
$ M. g# g) w8 k6 E( v q2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
1 e e! g! C& F. S' W" q3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 7 y( l) L2 F" B
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 4 X x% a' q: M5 g- o3 d: v& O
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
: }! k* U* Q0 q" D9 p, f0 a" |6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
5 ^9 k+ t0 |* L) }) ]! k2 i7Kinki University School of Medicine, Osaka 589-8511, Japan
! \; K& u+ W& T( Q" m8Izumi Municipal Hospital, Osaka 594-0071, Japan
3 w/ N) ? {, z9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan # a& E/ Z0 a: X5 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
* |, M/ N+ S9 }8 ]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. 4 b- |/ U" ?1 Y' A6 N2 W- W
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