Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type. z% ]9 x4 b' L; N7 V6 ?8 ^
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
6 m6 Z G) ^! }$ T# [9 X2 V/ K+ Author Affiliations2 k/ K) I7 R5 _
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
G$ n/ V7 O! @( u2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan . J0 Y- Y: j0 W1 s# E& f
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ! F- J1 ] V4 x/ F2 L" U/ ^6 J% V1 C/ B
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
) _0 ^' x$ u9 r) S- t5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
/ o1 n# e8 ]; o* K' n. u6 b6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan % }4 C& a1 W0 g. D
7Kinki University School of Medicine, Osaka 589-8511, Japan
! J! j! f" u0 U2 A* a8Izumi Municipal Hospital, Osaka 594-0071, Japan
5 [5 ~! ]; C$ F9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan & |0 f/ c2 O, i; F; _
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
' `0 T( P8 K# T7 @ }9 i0 |+ aAbstractBackground: 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. : P& r! A! I' P! O, `
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