Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
/ I! ~" [ D4 O% G% k* {6 uNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1 H4 M' t: T* C" a1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ' n* l2 l0 b. x1 h
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
8 O- n: x8 U7 y7 n3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan . z `# E+ B) M( L, F
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
) V2 P( C8 O6 H! X8 _5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ; Z7 _: ~3 }3 ]; W4 D
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
8 _, w" K& f8 t1 C; z5 a: \2 W7Kinki University School of Medicine, Osaka 589-8511, Japan
9 b+ M0 ?8 Z& m3 d2 a! v8Izumi Municipal Hospital, Osaka 594-0071, Japan " R5 Q# ?" [4 a8 ]4 a: p" @' O
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan : n0 j5 t5 h( H4 U& k/ U; Z9 J
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 + `( L5 ]6 k# \0 j! q
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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