Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( [! h' x. @7 c7 s) {- n: J
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ' t, \. k) e$ \6 v! B0 q" t
+ Author Affiliations8 L) S: C( Y! V+ [2 K
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan : [' p" V2 P: n; I9 y( G8 J: Z1 O
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
; B6 V# Y; v0 L% P3 B3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
! ], H. n6 O9 X! k5 q. y: X4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 3 v, h7 _3 z( l6 M5 \3 ?6 V) q
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 8 U& [4 h9 ]. I2 T. r% R
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
1 W2 S3 S( ]$ Q. c/ O+ R7Kinki University School of Medicine, Osaka 589-8511, Japan & Q7 x9 H9 a; v' s
8Izumi Municipal Hospital, Osaka 594-0071, Japan
' } Z* W- i7 ^! e7 A9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
8 y4 o+ H2 Y- 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 2 [3 e5 }4 U7 m! t2 E$ m
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. & M0 i2 i3 [8 V# A4 x: K6 U
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