Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
+ I @- `3 X# c2 e! {NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 : I7 t, U6 C: s, J
+ Author Affiliations9 [4 M* k* i: d& ]5 g) Q
8 D8 Z/ M) ?+ P* r9 |1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
+ A) a9 N0 J; C( s2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan # }2 ? G8 N5 l9 m; U
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
7 o( i7 }" I7 I. E$ e4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 5 Y8 D3 Y! |. \" E, q7 X
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
' |) A* {# L- Z; u6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
^: ` \6 E" G) W! Z# P8 U s9 F8 X. e( y7Kinki University School of Medicine, Osaka 589-8511, Japan 2 ^# v( b0 e$ a
8Izumi Municipal Hospital, Osaka 594-0071, Japan
8 _. i# K5 v7 e, U1 z, F9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 1 `7 N8 t" L9 m' M( B. k: r3 Y' }
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
$ A R( l' S+ J. e. VAbstractBackground: 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 a4 H! |7 w: h0 K+ e$ B" Q
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