Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type/ l+ f1 j% H6 j8 [# k
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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8 }7 x: a! g9 `- G. d1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan + {& [# w" d- h5 U4 u: c
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / h2 E- j+ R$ |
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan . ~: t+ Y, a |& w
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 7 P& K; L- g5 y* @
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
% a" h' j5 z- A, Z6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
* ?# x, M" d2 |( S6 h& ~' @7Kinki University School of Medicine, Osaka 589-8511, Japan 2 Z7 ~* J3 x+ s0 ~2 O( G
8Izumi Municipal Hospital, Osaka 594-0071, Japan 2 J' ]' n+ W3 U d; F2 M" B+ Q
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
) v/ {+ P7 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
& j, M9 g* ~7 JAbstractBackground: 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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