Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
/ L3 _2 G$ v eNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
% p! g3 t) T7 g' c. w+ Author Affiliations& C" ?3 t; Q% ?' D
- A2 f) k( `2 Y( m b& a7 v0 d1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan % A5 v( E! `% j! W! |% E
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan $ p) v: X; C: A/ a% E7 C! Q
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
% L& _# S) H; A& `4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
4 B2 i! h2 o( o- C; ?7 V0 S5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ! ]2 d3 `( f, x6 r5 {
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
% U, l6 g/ @ F. o7Kinki University School of Medicine, Osaka 589-8511, Japan
3 }& C( }2 a2 G1 B* B" j, z3 Y* ~: w8Izumi Municipal Hospital, Osaka 594-0071, Japan
8 A/ G2 e: K1 L7 c9 k" S9 J, g1 a9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ' N) `; `% `; C; 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 2 q W P A `, o U
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. 4 V5 v+ e0 H6 P6 g( R
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