Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
% W- f* O0 |8 G* z9 i; iNOBUYUKI 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
4 O9 q5 k- x+ B5 s2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan - N# q1 ~- q& K' u
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 @+ X0 M. A8 C5 p, v4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan # g& p2 K# z( Z1 h
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 4 |0 A+ N9 P/ H2 U8 a6 `" B: m
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
, Y$ g9 _' @! N. S7Kinki University School of Medicine, Osaka 589-8511, Japan ; k# |9 _7 W7 V3 n! u) b
8Izumi Municipal Hospital, Osaka 594-0071, Japan / z+ w& @" X. `
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
2 M& l/ p9 [, ^% 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 ) f. n K- Q1 k! Q" J
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. % l! k1 {: S( J2 c$ F, w
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