Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type& c3 H" k4 q* `
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
3 n% R) o" S+ l8 }4 x$ E- W2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
: W3 c# u5 v! O# Q: w {3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ) [4 S( N; T+ W9 i, a' c$ V) _ T
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 6 s5 T& V( @; b; x$ I5 h- z
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
3 P V4 q Q4 W; V, ~9 p' ?- O" r' v6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan % d% o$ `, P- T1 f- _
7Kinki University School of Medicine, Osaka 589-8511, Japan ( C3 f, Z8 Z8 d
8Izumi Municipal Hospital, Osaka 594-0071, Japan
, W+ Z& C& @8 ?+ |' `9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
2 o1 Z1 v) Q; 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
0 Y5 Q, H6 N$ d* u7 lAbstractBackground: 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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