Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type/ L8 t5 B. N0 L) J+ Y
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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7 p0 X, ]. o) f7 |1 O) B1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
1 D& H9 {2 F/ \) j7 s- b2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % }* V" G7 A J2 G- p
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 9 g v& \& [* p6 Q
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
6 H* o7 P x7 d5 g; }3 q9 k5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan / w2 B7 K4 V( u7 n& }7 d
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan , z3 x0 L$ w) M' ^
7Kinki University School of Medicine, Osaka 589-8511, Japan
5 Y ^* _' {( Q' }8Izumi Municipal Hospital, Osaka 594-0071, Japan
Q6 X7 `- }; i, b) g# k* z9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ( `& R L; ]8 `( w- ?
Correspondence 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 ; r; O3 @) |* q# S1 Q p1 U
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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