Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type$ c9 H( @& c* ^1 W& ~# F# N& n& X
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
% e1 f |* ]" B7 {0 N+ Author Affiliations8 h- b* E I) K7 F$ g
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
( Q6 M' v5 G: q6 d, Y% s2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan $ M4 K9 k1 S3 J1 g7 i4 Y0 x: Z
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
6 u3 P, b2 B: L k8 Q9 m2 n; B4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 7 X. s+ _% P# h8 o& U
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 1 ]0 x0 Q+ [" l3 a
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
/ i1 {; R! N) M2 N! h7Kinki University School of Medicine, Osaka 589-8511, Japan
X$ b1 }8 K2 Y8Izumi Municipal Hospital, Osaka 594-0071, Japan
3 f- k: c4 ~- M7 i/ J9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 0 r; E2 a1 J1 z f/ N4 t5 ?. B
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
6 ?( ~* v+ p) ~4 y0 dAbstractBackground: 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.
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