Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type7 i6 u; m5 z) }& ?# q! D0 i
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 8 `8 N9 J4 x0 a6 X3 b$ C! Y
+ Author Affiliations) Z1 H1 O0 O- x# L& d" n
1 p9 {. \$ u* |1 G8 b; I4 b1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 5 ?" `$ S# J( B9 n# r
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 8 v1 i v7 I" l7 R1 ~' k+ y
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
! c- `" P0 e/ o# [; e6 J# c A4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
( s- A/ {. e0 X5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
. l w2 S' P# d( m4 G6 d. C% i6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
! ?& {1 k9 j* d8 C) _7Kinki University School of Medicine, Osaka 589-8511, Japan 9 v* D6 A9 Z: K+ \
8Izumi Municipal Hospital, Osaka 594-0071, Japan
3 q- W: [ P" i5 e9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
/ P6 S# s' ?; f8 X0 n! F d" u, bCorrespondence 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 . ]. Y& P' I7 f4 s" s" }1 E0 L
AbstractBackground: 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. , w# ?+ [" |% J& M* Q1 v
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