Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type8 W6 f( V0 s6 z2 B) z+ C' e0 }6 ?1 d
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 : Z; z0 x% e1 a, z# v
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
6 i( M0 x4 X2 {, k! e9 n2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" l: J+ W7 E1 J5 ]3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan . v, }6 E* a) f4 _+ V$ s5 {
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan : d8 t% b" k$ t8 u
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
& t+ }& B# [7 }9 ~6 j \6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
1 G+ _" K& u) [2 j) F' l7Kinki University School of Medicine, Osaka 589-8511, Japan
% ?' V: O, v/ d# p Q8Izumi Municipal Hospital, Osaka 594-0071, Japan
# ~: D, ~; h2 j# }% W- l3 {! v9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
, y& w7 V- |" ^1 S& 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
4 Q7 O; J$ `; B9 E2 v" bAbstractBackground: 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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