Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
6 V& K9 l* u5 _5 i( s$ {NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 8 F% x% A* L2 r, h& _4 J0 p( i
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
. j3 p2 E3 a* I/ M- ]- A+ S2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 8 b0 [/ D9 E& A* T* M
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan - Z0 V( O7 [2 I% E3 ^
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
* B5 Y. K$ E0 D+ K5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan / w6 O" h# X6 P- Y* T
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan # d& l0 ]: o& C
7Kinki University School of Medicine, Osaka 589-8511, Japan # Q( B. V8 E1 c1 G
8Izumi Municipal Hospital, Osaka 594-0071, Japan
6 U) |8 e3 ~) y6 Q1 h9 [9 b9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ' t z9 j& o" D* h' v" X2 S
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 , m3 D$ ^5 b2 e/ Z! @. E4 t( _, x
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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