Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type5 g" }- O5 I; e9 Q
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
1 B9 x7 Y c" h+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
7 L1 ^( K" c& q, f2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % I# S; U2 I1 \- @9 ?8 g
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan - a# V9 r" ?& U [/ B/ ^) @
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
, d6 z3 U0 _6 w+ f/ ~$ X5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ! A! ^) a, }; j1 g; k6 u6 W
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
0 O1 q1 ^3 @' v0 P2 C& G7 E, O8 x1 Y% d7Kinki University School of Medicine, Osaka 589-8511, Japan $ L+ l: t6 z4 o2 e; P/ B$ c
8Izumi Municipal Hospital, Osaka 594-0071, Japan
! A" c: @- S# ?7 F0 ]3 p6 F! M* l2 o9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 8 v) U0 F2 }5 T/ Y3 c
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 : L i) U9 n* E0 \7 X; \
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. & ]1 o! i0 c# \' j
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