Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type6 X$ k. I$ l z# _' {
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
5 Q! `! K z" p; ?6 O1 J1 y& B1 z+ Author Affiliations7 B4 w8 n& ?* F2 k: n) G
) `3 D/ k9 I2 ?1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
6 C8 R8 n8 M7 t2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
, p; @6 D3 k- J4 d% a3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 r# C3 O! Q- p1 B4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan . |* i4 w+ k% @
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ; `$ t# i7 s% B" Z) j) {$ i. N
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
5 j1 D8 _/ Y! g7Kinki University School of Medicine, Osaka 589-8511, Japan 9 p2 t( i8 W2 Z5 J
8Izumi Municipal Hospital, Osaka 594-0071, Japan 0 l6 ?/ _. n; H: H* ~2 {
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
5 F- W+ z1 ^& X% WCorrespondence 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
; H, \; u0 B1 r1 DAbstractBackground: 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. 5 B" q3 c8 A9 x
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