Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type7 {4 ]9 T& ]* ?/ K8 [: z2 `0 y' [' t
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
. ~: ^6 h$ D6 P: u% i+ Author Affiliations
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; h) a+ W- |9 B( d1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ; Y4 A2 Q" Q: L; g
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / z: G& W9 `# _9 O* |0 {) p! T
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 I) `- T0 L- }; j4 e5 x: Z7 }& A4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 1 @! {) P# n$ b1 T/ K1 Q6 d
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan & s' A C2 ^; T j7 W: P
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
- j2 s/ u1 n/ c; e1 \* z5 B7Kinki University School of Medicine, Osaka 589-8511, Japan
& x4 a2 `4 {5 p( d2 Z: ?8Izumi Municipal Hospital, Osaka 594-0071, Japan
! L/ G+ N: G6 N1 y+ A9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 8 s. n( {) u* w, S3 W( _/ y$ m
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
% ?7 E. C( u% Y& KAbstractBackground: 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. 5 E" y0 }( z4 X( v9 s
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