Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( Y" D* t1 J+ u
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ' ]% T* L% @! e1 G1 z; |! K' |
+ Author Affiliations5 j: A9 u" ~, w
) F2 o+ ?8 g* B- |$ e) |/ K1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 7 u% K2 U4 I. B T* D2 z
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
' v9 d0 T/ O6 R2 X8 Z& }3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
: B. j' U4 _0 z6 J% k4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
/ n# v" B' J, c/ [" J5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
/ ~( t- ^- r9 R; b- z: h4 p6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
: [) W0 }) u5 |+ S7Kinki University School of Medicine, Osaka 589-8511, Japan
5 g6 {% j8 L' r, R" q7 L8Izumi Municipal Hospital, Osaka 594-0071, Japan 4 o. X# \9 E/ N2 @/ @' |( G
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
, x0 ?" }' Y3 J; MCorrespondence 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 2 E; g% T+ Y) C+ Y6 Q B8 P& m/ V
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. 4 o: ]& N: p- J0 K; S2 g2 r
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