Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type5 O4 a f/ N% Z
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 7 ?. L" h1 \- o
+ Author Affiliations
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9 w# r6 t: h$ u }# t x) p1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
g! c5 C y- P6 j% D: m2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 u! P* s( O9 u: I V3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
, ~9 X- b" f# q4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan + |6 T2 Z* @) q" O- [8 N$ j' [
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 5 x6 ]3 `5 H/ W4 y* y+ f; ^1 \+ n
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 5 t/ ~6 B0 _# ^4 ]
7Kinki University School of Medicine, Osaka 589-8511, Japan : F6 ^- c/ d2 H' K5 C; v
8Izumi Municipal Hospital, Osaka 594-0071, Japan ( \; J. W6 a% \. Y/ ^- a; i! e
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
% _+ C6 j: a' M* g1 [4 VCorrespondence 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
+ s7 l- l! h* O5 E& nAbstractBackground: 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. 1 Q! V; V7 d* q3 }
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