Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
: P; s" P( Y# j* Z+ l- i/ W4 QNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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* q9 t& c# W g" K3 Y1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ) N) Q1 I- x* x3 l* Q8 x" y$ Z
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 4 |+ `5 h6 P. y2 ?. b! D
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 |/ m W/ Z- Q# Z4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
8 Z8 l/ C$ s/ U5 G' ~& }5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 1 w5 I5 Z6 H9 d5 G1 j! ]; K
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan / @6 N! a6 R9 {2 i2 k
7Kinki University School of Medicine, Osaka 589-8511, Japan
1 v. d3 k5 @% A. k8Izumi Municipal Hospital, Osaka 594-0071, Japan 1 Z& D' J% o- f. e$ t8 F
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
3 I) ]0 K1 V; s4 }1 \$ 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 0 i/ l# h* f- V
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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