Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
* d _# d+ u1 |3 E6 G, t3 PNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
T" q) ?( y1 W0 ^+ Author Affiliations J- \) F9 [0 y% M, ?
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan - P$ f$ G# l* }& a) C8 Y; c
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
1 g$ @0 M% \. C! d& \+ M, W3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
- `- p5 `! t6 C) M7 h/ i# [: H" f& @4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
$ l/ c! y0 f. o# y$ h9 l5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
7 [% q Y( z V' w3 a/ s" x6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
8 K4 \5 K( j- q9 _7Kinki University School of Medicine, Osaka 589-8511, Japan
$ _7 {" T0 {# v# g$ H4 X* ] a$ ~8Izumi Municipal Hospital, Osaka 594-0071, Japan
. }* _! m! B- E9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
$ \( R3 O: K/ Z3 UCorrespondence 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 * y0 t. @. B% u( h0 v
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. 6 j) j! R" e' l7 b6 t
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