Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type2 L+ t9 j- R8 P
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
7 a1 a3 s9 b2 T% u6 d+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
+ H u1 h3 K1 f0 k# k i& D2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan " Z+ L# K2 W6 X" V/ A- A
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan . s* k$ t# [$ X/ V7 r! m& q
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan + u; C2 |1 q' L2 d. w& W& G
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 2 o I F# i# T& M! C. o' `
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
V% c3 L3 o6 `0 L: ]- b7Kinki University School of Medicine, Osaka 589-8511, Japan
4 U: K: V/ S1 ~0 N6 q* f8Izumi Municipal Hospital, Osaka 594-0071, Japan 9 I1 `1 s0 H! f2 d L' }
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 7 o I6 u! W( c3 L# ^' {4 q
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
/ }" C+ q3 O: J e+ d) BAbstractBackground: 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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