Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
0 {2 k; R7 R% ONOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 5 U# l) b& w- G+ L
+ Author Affiliations t x0 D8 [; ]3 ]+ b
5 Q& R# g& I4 X3 I; D1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
4 ?6 w! ?! w& p3 m& P2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan . M3 f+ b" x/ J; B& }& S
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : u6 ?7 ^3 ^7 K' z6 D6 }( W
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 2 s* c4 D/ J9 ~0 F
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ; y" @. K, E( s% Q) w$ T
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan * s7 o9 n. w$ \$ g
7Kinki University School of Medicine, Osaka 589-8511, Japan 8 d( C: C; c* v, e; ~
8Izumi Municipal Hospital, Osaka 594-0071, Japan # ^8 ], G* j" R- `" x5 \! b
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
8 Z' \9 S, V4 w1 j& R/ U* b/ vCorrespondence 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- E- B }1 D9 e- T
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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