Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
& B3 `2 b' d: ~6 h4 f( Q, z$ RNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
H4 Z. g5 J. R, |1 h6 F2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 1 }9 b. J* e2 l8 g
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % |! g9 I! F* ~, }9 k2 _
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
: O* ]; ^ X( `( i7 ~& p4 q. q5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
# U3 X3 m k) I6 g8 o* Q6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan , g7 H2 t, F# }8 d- z5 J' u
7Kinki University School of Medicine, Osaka 589-8511, Japan ; v5 b/ [8 L" W6 `2 y' E2 U
8Izumi Municipal Hospital, Osaka 594-0071, Japan : Z. {, D/ R$ R* v
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan # |- z. S+ R4 K2 O2 _( j
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 f5 X' D; f! {7 g7 i! z" g
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. 6 K& H* T& q5 T* J
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