Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
4 o0 u! w( \' a$ a3 bNOBUYUKI 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
& m t. o6 m9 d* I2 J( _( ^* F2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 0 i: Z2 m$ e: J4 b4 Z- i
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan , S4 B6 G$ h7 `2 @4 J/ N" c
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan . Z, s. t, V& b2 ~
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 6 C' h1 T+ z9 T3 g) Y
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
* R, B* S! ~) e B( j: e7Kinki University School of Medicine, Osaka 589-8511, Japan 7 D+ Q8 P: ?0 {9 b) D& b% L0 f
8Izumi Municipal Hospital, Osaka 594-0071, Japan
+ u' E$ ^1 ^; c7 N V9 t+ H, F9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan * I0 r1 K3 b5 d X! d
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 2 h( d- j) I3 @
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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