Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type7 V8 }% V3 [; C2 |* h
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 * G' @7 b+ J0 O; e6 d- S i: }2 @
+ Author Affiliations* h# z; q9 ~6 d0 f/ C# T1 [; T
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
5 s! y( ]- A! ?1 g m$ w2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
0 @1 e( s5 n( M3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
8 E3 B2 A, L! K1 F* G0 p% [' B4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan , `6 d( ~+ P7 U, l' ^6 W
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 5 s' h$ }# S3 K. a8 ~- j- O$ m
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
. S4 c/ ]9 H9 @7Kinki University School of Medicine, Osaka 589-8511, Japan
! t5 T: Q7 n( C% i" }* G) D; D8Izumi Municipal Hospital, Osaka 594-0071, Japan
* e' I0 z+ J4 q/ j" D9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 0 f& k8 t9 m5 D6 c5 i4 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 6 q1 G5 M) X ]& 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. 9 q* Y$ n9 S$ a1 L
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