Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type0 M! c" C0 Y9 c3 d# a2 M6 C
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
2 j3 i5 c, g' @: C0 n F+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan # O. s% A \) m9 T2 R
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
) ~% J" h# {" Q: o- b- Y4 g; g3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
# G1 y2 l9 C1 E, l" Z( o7 j4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan # u1 S2 h# [+ M' E. U* W
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ) p2 v9 |* {+ r/ g" I/ O/ r: R
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
' K9 A8 J5 P5 U. J7Kinki University School of Medicine, Osaka 589-8511, Japan 0 ?! O6 N; f3 D4 ?# M* _" I B
8Izumi Municipal Hospital, Osaka 594-0071, Japan ' l3 o7 K* a7 |. m6 |3 d: n
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
4 Q# f+ a0 G7 S6 |! x* cCorrespondence 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 - Y# [2 B; O( ~
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. 9 t- r% Q9 g* d" N+ o3 P
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