Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
6 T$ n' u3 W& m5 s: ANOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 / f# r3 r P/ S* {
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
* n8 c# `5 N2 C, p2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
' K+ q8 J3 h8 @: q3 q! C3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ) Z# U9 o5 }& m- M. ` o* Y
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
3 Q) i0 H2 i6 K { o1 M5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 9 y& q& ~( C0 v; ~; h
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ) H& V- @* a: `! _
7Kinki University School of Medicine, Osaka 589-8511, Japan : Z: E" T7 N, ?" u% z9 R
8Izumi Municipal Hospital, Osaka 594-0071, Japan
4 A2 E1 I& c% d- [* F% z6 t# W, v9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
6 a8 ]# f' a. m. U0 \4 iCorrespondence 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
; [' ?1 h6 k2 E; ~( O+ cAbstractBackground: 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. # }, [, Z% I3 H& ~$ A
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