Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type, D2 B2 h2 u- P
NOBUYUKI 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
! \# L7 {* }* ^& N5 A6 w+ P* O% p2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ; o: S7 b. |9 ~3 v) {' o+ c
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
2 X! ^ E! i( q3 y& M4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
9 Z& s; o1 q' e; }: d5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
' I' i+ _. O7 H/ i6 }6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
: E' E; o N7 w" i7Kinki University School of Medicine, Osaka 589-8511, Japan 8 i" x- T7 [4 ?% ~
8Izumi Municipal Hospital, Osaka 594-0071, Japan
; S* a) c4 ^) l' B9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
$ ^3 w( z& S+ f* V2 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 % ?# \. t: d, {. j# L9 q6 L# v& E
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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