Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
; V" a: W$ {% N% P% _7 dNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
7 s v& |3 C1 O+ x6 C/ M! o+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan : S# M3 K, v7 M2 Q7 G; H8 U( X
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
c# n( Y$ I; b$ d+ e+ y$ {8 p3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
7 _+ ?3 f; i' V% [' M6 V0 e7 e m4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
. ~) d& l, \! `( X( p0 A5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 3 ~& [3 _" [) O; {; h# p
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ; z6 }* I1 f3 T q0 z
7Kinki University School of Medicine, Osaka 589-8511, Japan : G! g$ X) D2 R& \7 [3 H
8Izumi Municipal Hospital, Osaka 594-0071, Japan & }. v5 Z6 x1 F8 K& j8 M
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ' p& y$ P- C5 m8 N
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
h: q0 S: Y; ^+ pAbstractBackground: 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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