Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type% U2 Y$ m) y# {
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 " B6 N% j1 |! ~5 k# Q* `
+ Author Affiliations2 O, K/ f, z% i5 }6 L- B
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 2 v; o) x' i' y+ o" H/ B5 R, x
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
* I- M3 G' _: v! y6 p% @8 ?( I3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
, |8 q6 f4 r6 C4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
, T. A# ]" R* e1 V1 P( n5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan , H, x1 P" w, V5 E! o4 m1 L* U
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 2 M9 Z0 J3 v. T# C5 I6 {
7Kinki University School of Medicine, Osaka 589-8511, Japan $ c. H! V" @' B% F4 Z- D) s
8Izumi Municipal Hospital, Osaka 594-0071, Japan
+ D5 M" I9 x: g* X6 F4 n' \! D9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 0 C: C$ n5 q1 Q) x
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
6 a2 p! J5 B0 [1 Q8 GAbstractBackground: 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. 3 J h+ P. H8 q
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