Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type+ f9 A3 z) f' y8 a. w
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ' V7 ?7 n6 q3 \: B; e! H3 I
+ Author Affiliations
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" G2 g) \" [) A. k8 R8 a1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ) l J0 h/ u: D3 V3 x% _& p
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / R8 K- A* o9 f0 C) M. R: g
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 4 q g5 `6 j9 B0 p
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
0 A3 E& b9 a0 T+ D% O ~5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
1 u, S) c5 w7 _4 D r6 z! p6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
' j! T" u6 ?8 `& v1 u4 X7Kinki University School of Medicine, Osaka 589-8511, Japan
/ e8 z% d+ i, Y* G/ p* I/ i3 J8Izumi Municipal Hospital, Osaka 594-0071, Japan " y4 ?' B8 F+ y. {5 b/ l0 D# D
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ( A6 R. E" D' 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
3 Y4 w4 c, g7 h+ wAbstractBackground: 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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