Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
0 W6 [* \4 a E3 b% I9 FNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
$ c6 o- X% x1 {/ E+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
8 _ E) i# w/ u; ?8 B2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 ?( U6 c( ]5 J' q0 U& a( g$ S% T3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan , y2 G# r& ?( q6 w' y( p- {7 ^
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
# E9 ~8 \1 V7 p0 Z+ X5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan " j: w" U, g; @8 q. n
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
, O! d, S1 Y2 H3 P% G9 @7Kinki University School of Medicine, Osaka 589-8511, Japan ; i. R$ v) V+ V
8Izumi Municipal Hospital, Osaka 594-0071, Japan & s5 f4 ?- X: |) C
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
9 X# J0 Q0 g, h, b9 p$ C. K& \; P* 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
* N0 L1 V( ^) H: V2 WAbstractBackground: 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. . r% O" U3 W$ ^" m2 A
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