Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
' K F" r; f3 A1 h0 e" |NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
# T& V+ d; ^8 x& W# H+ Author Affiliations; E6 S+ l! [& K
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ; n# ?1 Y+ n1 q
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ) \0 M7 R/ Q; ?
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 1 @* _* S7 e" x) V. J5 A' q+ b+ H
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
3 M; |' t x- L7 d5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
! |) ^% u {* r6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan % y( n. h) |: g. l. b
7Kinki University School of Medicine, Osaka 589-8511, Japan & L' Q+ W" I; S9 p* y5 l
8Izumi Municipal Hospital, Osaka 594-0071, Japan . C' S8 s8 H) r c
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan - |$ m* z" Y# S0 o4 W5 k
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
" K2 t. q/ ` H2 M+ JAbstractBackground: 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. & e. o9 X9 H6 v5 \
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