Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
3 ?8 z% q! V6 A. J6 sNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
* K7 P$ ?2 `4 S3 k7 ~1 ^+ Author Affiliations I1 Y3 Y( m6 N, e% {: ~' F
9 w- L( z: x! X" c2 m, N1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ! A2 f, L$ Y: Z
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan # H; L2 n% R9 w6 p+ h
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 6 R" {9 t1 e1 Y9 Q; h+ [
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 2 m7 Q) H) X3 t7 J6 }3 [- B- o( r
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ; @3 N. Q/ `7 v9 @
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan " j' H" x Y# u: K7 `$ C2 E
7Kinki University School of Medicine, Osaka 589-8511, Japan
; h7 f. @5 w0 f7 x& ]6 p8Izumi Municipal Hospital, Osaka 594-0071, Japan
/ T, x0 S3 I" {9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
, Y; h1 r9 G0 I1 ~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 3 z: S0 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. 1 V2 m+ Z7 @+ M& U
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