Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
) k1 J t8 D" |" p- L% C5 u3 K+ WNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
# U7 Y% n, v' T5 D6 J: S! S2 W2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
- _# z# m" h5 T* |: \) B- X3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 X( A" E: \; Z3 Z" f+ s, w4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
3 D0 p" ~. P. g4 N4 H5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan * [; ?& t" e0 e/ {. v) L: ~
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 4 @$ ? H5 i( u- y0 f& B! y) g
7Kinki University School of Medicine, Osaka 589-8511, Japan V; n' P) O' v2 r. m8 O! Z# E
8Izumi Municipal Hospital, Osaka 594-0071, Japan
9 I. `7 L. B: {: B, y1 v$ @9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
, w5 F. @8 n( l) v" n5 a% zCorrespondence 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
! W% F$ t, }) Q/ ZAbstractBackground: 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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