Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( x3 y6 |1 T* N! H9 @
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
8 d9 M3 V) `- U) n/ O% j h ]+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 0 Z r( g! A( ~. J. T2 i) r
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
* k, N0 r- }8 L- O* \3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 4 D8 i- N, b8 j4 o1 a' X
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 9 f" |( f6 L! K' y6 {. g1 ?
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
# Y2 m( M, ~2 Z$ @; _: ~6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
6 N7 ^! e& Y4 b9 J0 w. ~7Kinki University School of Medicine, Osaka 589-8511, Japan
0 W& d) |! C: z% g8Izumi Municipal Hospital, Osaka 594-0071, Japan
& N" |) F1 e9 W+ F$ ~. e9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 3 E u# }2 Q' J
Correspondence 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
( c; W& b9 g7 O0 b5 KAbstractBackground: 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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