Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
! q! H! `. p" C) b" E; iNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 8 y y- ~# F% K, x( g0 }
+ Author Affiliations9 s% l! Z6 |' D9 y; I3 Q
7 k' z: k0 E8 \) F9 V1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
( t; j- P% y- Z, j8 ~% I' c2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
# ]7 b9 H( u' g) p2 U3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 e: O+ w' I" g3 x- u8 N
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 2 |% U( w; x; A9 F# [
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
' p& Y8 k2 \* S% B6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ; b/ U, {) p' c
7Kinki University School of Medicine, Osaka 589-8511, Japan
$ W3 d* O8 `8 G0 D: \5 B8Izumi Municipal Hospital, Osaka 594-0071, Japan
4 P2 v' ?7 ]6 m0 J9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
. S9 d7 _, _! D" rCorrespondence 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 5 ]9 ?" ]4 x2 k N. [8 m% s, f. ^
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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