Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( n5 L! T8 G0 q4 h- q" [
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 2 o: A+ f$ Z3 t6 Y0 ^. V5 |& {
+ Author Affiliations
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8 c1 f/ c/ L- J2 Q4 O7 d1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ! h9 j7 | T, h! B4 a2 v
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
4 L# i+ a6 u# s: _3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" U+ s( S3 w1 @6 Y7 k$ Q; x4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
- x8 d* n" j. n9 H4 c& B/ {7 F5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
" D9 E' u) |1 o9 }6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan % V |, ~7 L3 d$ t% \# }4 z
7Kinki University School of Medicine, Osaka 589-8511, Japan ; ]$ r$ ~' T% x& v
8Izumi Municipal Hospital, Osaka 594-0071, Japan 1 w9 j. t6 }5 p, t' g
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
# h0 }: C" c8 pCorrespondence 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
. n6 E k, Q: j5 ]$ qAbstractBackground: 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. / x* ^) ^* c: P% M5 J
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