Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
5 s( a7 _8 y, z9 L- n4 ?NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 E' I3 J. V2 q: X
+ Author Affiliations8 Y5 o1 s7 e& V7 |5 y' [% v( g
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
' X; t. O1 a% E6 A: C/ M2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan E% k+ x$ R. e5 L- C4 {: ~2 M8 g+ ^
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 4 c2 a+ L8 S+ H' J
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ' f4 O" v H) e7 w
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan % w' M) K V+ J8 R d; T) y; j
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 7 P: S% n& N4 d) n
7Kinki University School of Medicine, Osaka 589-8511, Japan 8 L6 U! T7 u2 ?; }1 Z
8Izumi Municipal Hospital, Osaka 594-0071, Japan 8 H. @8 i/ T/ e3 U9 z# @' X
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
* r6 ^: O: L8 d2 u' u2 o$ q+ zCorrespondence 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 ; S+ I# ~, @9 o6 v8 W9 I
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. + }9 w. N, Q- I9 S: r/ r
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