Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type$ l* J K. ?. J. J1 {$ y" `
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ( G2 T% A1 M O( D
+ Author Affiliations( Z7 p# J) x' l5 c' p, ?+ \1 |: M
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan + b/ c0 D+ l# q' J, W
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 4 P( z( d+ M) r* H: u
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
- f" ^8 H. U+ D- f: q% x( X4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ! {. k J3 S# t* b9 Q
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
4 o i: _9 t- o1 ]) t: ^6 c6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan # ~# p* S1 J! {8 T- y
7Kinki University School of Medicine, Osaka 589-8511, Japan / X1 Q$ b6 M Z8 `! A
8Izumi Municipal Hospital, Osaka 594-0071, Japan 5 F% u8 O6 y& }0 u
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ' M% u2 {+ ~3 o) a- v
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 / y0 \. s- i: O2 Q3 ~
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. # p- x0 E$ E2 i5 \
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