Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
+ ? R. `" o4 eNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ; u2 O/ M5 y! v1 V3 m
+ Author Affiliations9 e7 [: z! f9 a
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 8 g) ~! T. \6 l" m4 |. W4 U8 N
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
: x2 O+ C" e! Q T \& D+ A3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ; `; H1 D% i. f8 X2 b d3 v F8 j
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
. f( w T3 Q, ]" T- \5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan - l. l0 M) i8 |+ P" p# G; f
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
8 Q r; g. V; S, F7Kinki University School of Medicine, Osaka 589-8511, Japan
5 {7 O" U+ ^: l" t6 s) V8Izumi Municipal Hospital, Osaka 594-0071, Japan
' J* x1 W3 D, M9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ! m F0 f* K( u" E' 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
/ i( `, x3 v6 v, I) _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. ! J3 @" G" ]+ f4 e6 C
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