Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type9 q( R1 V% N# E Q: u
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 1 O$ g# T R* |3 _$ y) g) o- t
+ Author Affiliations- M" H7 y6 M2 o1 C7 h q% r
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
7 N' T* N0 b# q) r/ f2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
* C8 J9 o& Y& i- `! G u3 }3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan # d9 _; u& A y1 K- t' p
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
+ b2 j& j+ T, D7 W9 e$ J5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan , F9 f% A+ g( T p
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
$ w0 D9 T4 o# y4 G6 t7Kinki University School of Medicine, Osaka 589-8511, Japan
" K' ]4 l; V0 s' S5 Y0 ~+ {; T8Izumi Municipal Hospital, Osaka 594-0071, Japan
- Y1 J n$ O7 z: T/ j9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan $ Z! m) ^. a5 p$ q% E" K1 _+ n
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 : p6 S( y3 N7 G% w
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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