Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
0 a' g2 W9 u- v4 f8 D3 ~NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
8 i5 N n% T) b3 O1 o$ i, O- j+ Author Affiliations6 W# L' ^/ R4 e% _1 U
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ! x. d/ r7 m0 U( n- I; M! p9 d
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 v3 M# ^6 H+ T3 W9 ^3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan - x# l" S5 {( X& C! ]
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ' x0 O9 L, x& l
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan & c% ]; e1 |" S; q, h' W
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan * c# N: k x) W5 p( b
7Kinki University School of Medicine, Osaka 589-8511, Japan ; G: U L s. c0 c4 L; R. N. A
8Izumi Municipal Hospital, Osaka 594-0071, Japan
" O0 O1 `6 N$ V8 F1 m9 @4 ~$ u- X$ M$ E9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
9 U! i7 z6 g+ V. o4 b2 x2 c4 bCorrespondence 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 ( v5 h. T, |/ L$ L3 K; `
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. 3 ]8 y; S" z! w6 H
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