Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type! R9 J1 o/ f5 N2 [: l/ ]0 y
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
1 Y; O$ G; ^/ l7 Z+ Author Affiliations5 h& O8 Q% }* R2 b0 M# e. n+ D
8 ?! Q% R" }1 |3 B1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
, l$ d: [+ |7 a b2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan & p8 _9 ?( b7 u* N f- c8 P
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 9 S4 j3 p* J2 v8 A1 y. V( B2 }5 a
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
0 U& L0 W8 X$ S, Z# K5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
1 U" z7 | D+ h0 Y1 t! w, L: {6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 8 h$ P+ c6 |$ O: B2 B9 F& w
7Kinki University School of Medicine, Osaka 589-8511, Japan
! E" e, I( q0 y8 p1 L8Izumi Municipal Hospital, Osaka 594-0071, Japan ) E" X0 U! |7 T' l. k6 \0 M* g
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
( s i; ?7 _- F7 u1 BCorrespondence 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 ; g5 M o- R9 q
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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