Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
1 L* @ c) R( {. [; PNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 9 A' V, b" q1 k. c
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
+ [2 n0 e) {* M8 L: ~0 ?+ d2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ' k2 \8 b$ L9 L" s; b# D2 w) `
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan J: { u6 q {6 S0 G+ }) `
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
9 C# J8 c( ?, y4 `0 P8 o( [- e5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
: ?4 z8 e2 _/ |6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ; M; N+ N9 c1 V9 q4 Z* Y8 q! Q- p
7Kinki University School of Medicine, Osaka 589-8511, Japan
- [/ B! ]! z$ N+ y. }( B# I4 B8Izumi Municipal Hospital, Osaka 594-0071, Japan & E; E* U, i' \7 Y# L' x! U& q
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
& G7 W2 A4 _7 L; hCorrespondence 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 # c( G: m/ ]5 v' z
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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