Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
% p) Q8 }: e7 P' G6 m' g: yNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 & R# C$ T& Y! w; m" E% w6 L
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
# G7 m) n3 f3 Z9 W' l3 ]2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 2 G$ L; O8 S( i
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 8 |7 j4 x# F; E3 W' Y
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
7 ?6 A P; U) \ t: m% c$ w4 B5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan + k3 h# r9 p; T' Z
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
0 F q/ T& r+ b; q; { f7Kinki University School of Medicine, Osaka 589-8511, Japan & J7 Y$ X" V P& H/ a" C- c# ^
8Izumi Municipal Hospital, Osaka 594-0071, Japan
7 h( i0 a1 \* B4 R9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
3 X& @+ C4 D! k1 U# 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
6 D, k1 g* A4 U1 B0 JAbstractBackground: 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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