Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type1 \! }! q+ g! B, S8 g) T
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 3 t$ S, K' N( G* K1 M
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
% n; M8 O% y- w9 [3 ^2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan & L* a2 S+ L- f' d6 B3 P& T
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 4 t7 _0 k. E K `% i. N
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 7 t6 g5 a& A7 m* \' t2 r+ o
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
0 o% p; D' M7 G- n: v1 i) p6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan + J7 p) t! h; T: T
7Kinki University School of Medicine, Osaka 589-8511, Japan 3 S' r, b7 o( y& d9 g1 l0 o6 q5 S+ I
8Izumi Municipal Hospital, Osaka 594-0071, Japan
6 B" }" j; z2 c* t& I7 x( y9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 7 U( ?( V$ c' L; ?
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 ; P3 _* |, y( Y; D7 |* q u5 P
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 q- u! g" p( b: ?
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