Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
8 F9 N$ M X$ d9 S7 m0 Z, c$ oNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ! k! l* Y/ {0 d9 P, n
+ Author Affiliations7 U. H2 M/ }' L3 h0 `- N
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
" G+ Y3 E5 z8 k5 m9 J! A2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ' C! A+ s. s8 ]' G
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
& K. A/ P5 s: M6 S, X+ f ?4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ! M) l' Q+ Z) u* B) k! ^8 s
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
y% M, G6 V+ I8 B% @6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
- J% e* V) T+ b: @7 w6 Z) ?& G7Kinki University School of Medicine, Osaka 589-8511, Japan
- V' @! D, s; f3 G6 b8Izumi Municipal Hospital, Osaka 594-0071, Japan
2 k7 i/ k0 m1 Z6 D% u+ L* G9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
1 s5 L9 W2 g3 `' O! _9 OCorrespondence 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 7 ?$ }8 D+ Q6 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. 2 C$ [9 N$ A3 d% l
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