Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
; S! e8 u! T5 G- ]: ?/ c) G6 \NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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! F6 b/ C: n5 j2 u1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan , |* {5 R% V1 H5 j( v, n0 A9 z- W0 f
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" Y! p4 E) d1 D+ S/ m3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
# y) `& V* ~2 a) `7 f3 k4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
2 W2 L( K# ^6 K4 m5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 8 y% A, n" C8 n" R; `- H
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan , Z/ K% a- A# u2 y7 N
7Kinki University School of Medicine, Osaka 589-8511, Japan ) h N0 j5 D5 [+ l) e3 j
8Izumi Municipal Hospital, Osaka 594-0071, Japan
; ^) z* `# B3 k0 s0 c7 _- t9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
5 q' F( c9 z0 I0 D6 p8 aCorrespondence 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 l+ H! O4 E v, v2 Y/ U/ UAbstractBackground: 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. 2 ?7 V7 r* D; Q I# R' o5 B5 {
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