Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
' Y: \9 |# M% ZNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 / u2 D8 M1 r# b- |: H) R
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
: W8 m- v, P( I8 B4 O7 X2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
; w% t" g2 d4 R1 i% U! h3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
' d% i0 `/ a( B6 |8 l4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
+ k# a/ a2 P* \: _2 @4 E5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan , o. S7 s# Y: T
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
2 R( o# K6 H x# j# e% i& f: R7Kinki University School of Medicine, Osaka 589-8511, Japan $ m9 `2 a4 q* x
8Izumi Municipal Hospital, Osaka 594-0071, Japan : t% {7 s/ Z6 z- ^( _: X
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 7 b: E, Q* r2 C! L2 O
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 8 d; u/ A) v8 C! r4 ~9 a' a3 x( s
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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