Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type, u$ ~6 P7 j5 D5 s' Q
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
8 o' f/ K1 t; Z! Y- Y# r+ @& M+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ( D" A8 N7 J Y" g
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % i/ v7 j: g0 G4 A
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ! I: G4 i' q9 I8 H! X$ h
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan , M' n+ X2 @& E' E) `) G
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan / f8 R, n/ W U1 D+ F$ S# f% K
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
" d* y* @; d+ T- F+ S) P7Kinki University School of Medicine, Osaka 589-8511, Japan ; p" ^8 o! n9 I: q! ]
8Izumi Municipal Hospital, Osaka 594-0071, Japan
" @$ b4 \0 Z J! @9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
" e/ K5 T( n! {$ p0 iCorrespondence 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 , {2 `7 X$ U. m6 u" V# H
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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