Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
Q2 ?! I" P8 XNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 # _0 P/ j+ x4 f5 K
+ Author Affiliations+ A. b. N3 }" X0 @
9 l$ |9 i9 h- _1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 7 G* X- b; k4 l! b; W$ c! W% \, i; K
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
) P n y0 O$ V( Q- U, R8 H3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % K- v7 d& ^( ?7 V- i& m! q# q9 c5 X! R
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
+ i' D3 ]& L) }: t- U5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan A* U( k" ^; q
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
# d+ g/ m) X( u: v, E, b9 W7Kinki University School of Medicine, Osaka 589-8511, Japan $ G5 ~" r) J# m
8Izumi Municipal Hospital, Osaka 594-0071, Japan 9 B. A; ^3 ^3 ?* n n6 J J
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 6 c; s5 A8 X- b0 ]
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 5 V( h, f E4 T1 @! w0 a2 Z$ g
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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