Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type6 c) E9 r2 ~) w
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
$ |0 k& T H: B1 m9 K: k4 E+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 8 l8 y+ a2 f) H
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % G( X+ y0 K! A
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
) s3 D; V- B4 q; w; r ~4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
& Q& x6 N, ?4 G8 `. r# F5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 0 W8 N0 }, l7 l" D
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
' z( i, `0 r, `* j( D/ f7Kinki University School of Medicine, Osaka 589-8511, Japan
7 @" r) f+ @+ `; K$ }5 o; y* A8Izumi Municipal Hospital, Osaka 594-0071, Japan 4 p- l1 Z" A! m2 `
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
$ b5 |. S" k- B+ u8 J" ]+ R% ~5 {9 MCorrespondence 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
i3 i& m2 h/ w! N- e @; Y( \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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