Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
8 ]2 q7 _# D. P; @1 s5 @NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ; t \+ a! u; H4 ^" v
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
" k" Q b6 ] X! y6 d8 g6 |- J2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" R, N) B. h3 Y' r9 F8 u3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 7 ^' l2 P$ j! C
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 8 _0 n# z- v; L8 Z5 U6 R
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
( f' i K( x; ^* q8 M/ X9 i1 z6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
# r/ D4 u- s6 r5 n: T. C. m; y7Kinki University School of Medicine, Osaka 589-8511, Japan # L1 I" c1 K* \/ H
8Izumi Municipal Hospital, Osaka 594-0071, Japan
1 b# [+ ?# u0 K+ }9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
0 X S# n2 ~5 Y a/ gCorrespondence 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
: L5 F3 b* @# X7 @+ L$ 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.
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