Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type |, }7 O! k6 m7 E3 E* h" A
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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# ~+ b+ u/ v8 m# v7 L1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ' S- v; O# V7 X8 V
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 0 F' h2 {' k5 R" s: H
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
6 P; @& q+ I6 t2 ^& o4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
# b4 B+ u+ c% i! |& l+ p6 _5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan % q7 |& g8 y' V; x! C4 a
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
2 c$ c8 [. T1 T: d7Kinki University School of Medicine, Osaka 589-8511, Japan + Z# }' q& Z9 w2 z0 i Q
8Izumi Municipal Hospital, Osaka 594-0071, Japan
" B# T; n! Q$ |9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
1 z% I8 S+ m& p0 F1 B2 F7 W" \- e6 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 " r' ^. \+ |* z! S
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. % P0 b; M( d# N
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