Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
4 }! y+ \4 g$ `+ b8 sNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
6 z* F/ ?' ?, w# g8 ?5 n+ M+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
$ M8 f9 F9 L0 j% Y2 t2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ; b5 k+ v$ M# b2 U- R9 ~3 ~+ m7 I
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
6 M) U( a* M- V+ b2 K1 p4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
) ?5 K* l! _( d# v% D; P5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
; C4 s" J1 Z% ]3 y! }5 ?6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
0 {3 C: ~/ T7 h7Kinki University School of Medicine, Osaka 589-8511, Japan % c; x) H$ o3 m
8Izumi Municipal Hospital, Osaka 594-0071, Japan - {0 L: T' O+ \. \% p
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan $ C1 k* P8 s) \4 F* I
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 + S/ }: _0 e' `7 a
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.
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