Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type1 Y6 [9 A) }. e( W, W# y' w! U
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
) A1 ]- ~9 w) B9 ^4 ?5 @+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ' x' V2 r% M# m
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ) o/ T% P4 v' m: E. C y
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
3 f+ _! K% f, ^4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
) [% g3 _% B7 C9 ^5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan & x: I" b Z( I" @! T' q
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 7 y* [ B* T% ~" ^: E2 ]
7Kinki University School of Medicine, Osaka 589-8511, Japan
- U7 h, C$ {/ R1 \' l' r8Izumi Municipal Hospital, Osaka 594-0071, Japan 4 A5 l5 Q3 l/ u" C- s# g
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan % v# [2 I. A/ L N
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
* i1 |( W8 V: X9 t( `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. ' A0 X8 m- W6 r. Z
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