Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type: H+ u) b7 N7 H! n* | G6 I+ I
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 / d0 a6 j$ c; C$ Y+ K( H7 x
+ Author Affiliations" V9 a! q1 S3 n
7 G0 x. S1 S, `0 C) t' Q6 L1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
& g9 V* H: W3 `7 f( N& }3 l+ L. u1 W2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 0 I9 y: }5 k1 D+ m! @
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 W( F/ J5 N& z/ Q4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ' J' y7 A# |3 |( m3 f* v
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan & j4 D! i) H, W/ U8 H. }
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan / P, @2 h( h+ k7 h& Z s7 q) |# L
7Kinki University School of Medicine, Osaka 589-8511, Japan ( w% p [& }0 k- e5 |
8Izumi Municipal Hospital, Osaka 594-0071, Japan 7 h+ o! H0 x- p, Z
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ; a2 N5 o+ g1 U- k0 |1 \
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
$ l% m; x: S1 K" L EAbstractBackground: 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. " F! y; F2 x) X% W d) s- `/ X* L
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