Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type" I c. a/ e+ M3 ~" A
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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9 J+ u* I. _! }1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
$ d1 D$ u8 o0 X r9 m2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ! U1 X0 _, F( M& S* s1 {
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 h3 b7 E4 ]0 J4 `
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
, z/ f3 a7 ?/ h1 K) K2 X8 t3 P5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
+ E; K6 N( `! w0 q9 S: E: h8 I+ }) h6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
0 H1 W. b& v& ^' m* `$ l0 b7Kinki University School of Medicine, Osaka 589-8511, Japan
. g6 S0 ^5 h/ n4 \8Izumi Municipal Hospital, Osaka 594-0071, Japan ( [$ F1 Q& ]" r
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan f, R2 s5 i& W. n! }8 S
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 O h' K4 K7 ^4 s; H
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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