Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
/ a2 [' V# Y4 m! S7 A3 WNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 % n8 @$ S& o, ]- l9 P& d G
+ Author Affiliations& j/ _# a' ]- X/ i1 C
# n3 @& c4 h; r5 Y% x1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan " z& j7 I8 u7 z: S) S- l
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan - U/ c6 F( R- ?4 b, T% S
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
8 d& ~1 t$ I c# Q' @% z8 e6 F4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
& |9 `; ~/ G4 B% C7 ?; H8 Q! G5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ( g( q! C* S: b% b/ H9 F1 S% y
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
L8 t2 b6 O4 g2 y. d' c0 W+ v7Kinki University School of Medicine, Osaka 589-8511, Japan
) x0 L- F' A, H* H) O. J' c* _8Izumi Municipal Hospital, Osaka 594-0071, Japan
1 A( [7 ?3 s. U% L: z9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
( A8 z+ M8 |0 F( V9 M+ RCorrespondence 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
9 ]7 X2 o! X0 S% U8 B aAbstractBackground: 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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