Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
* R5 X! g9 X% a4 Y x% B( f% D; mNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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3 `5 u$ A! Z. Z1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
# n, G3 i2 J1 c% e5 z1 M, U4 {2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
! [% e8 i' N9 G! O3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 |& @8 U8 j/ T4 O' |4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan , x/ ^5 Q ?+ u9 ?! U5 y6 C
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ) I- s) f! M0 r' f4 R& w
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 2 S* d! f, Z6 A! c
7Kinki University School of Medicine, Osaka 589-8511, Japan - {- p( L* a* A4 I* w1 q$ g
8Izumi Municipal Hospital, Osaka 594-0071, Japan - j$ J6 A. [; I5 \, s# q
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
$ g, t; J' t9 x4 O8 g1 d6 }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 ( c+ _1 F' g$ e: S4 |
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.
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