Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
4 k2 q4 v6 E q9 ~! KNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 3 G8 \8 F+ m x$ x5 x6 p
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 1 v6 W, {7 o J _
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
+ l4 m3 C- [+ @+ [4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ( \1 \1 R+ T, h
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 1 I/ n2 F; b8 c N: n
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 9 P, l7 }6 q( `7 b% t
7Kinki University School of Medicine, Osaka 589-8511, Japan . k8 h1 U4 c- h Z. @
8Izumi Municipal Hospital, Osaka 594-0071, Japan 6 `; @: |5 K# r$ _) [! l4 v
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
* k+ Y0 O! ?' U3 [: A8 TCorrespondence 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 9 \+ o) D$ N, @; X: `! s6 f
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.
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