Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type$ B3 O E. ^" z' L+ l2 M: v0 W
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 4 T, k- w/ C' W0 Z8 o6 K2 ]
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
# h2 ]: {8 j' a) x2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / b' n2 q" N! O8 d, G; K
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan , U& h; W- a4 b+ u
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
8 j+ {. h3 R- p" d: Y5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
# f4 F' A+ {: a# ?) i6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
0 Z1 u; |& F& Z& |# d) [0 y7Kinki University School of Medicine, Osaka 589-8511, Japan
# ?) C4 \1 Y. p) { k8Izumi Municipal Hospital, Osaka 594-0071, Japan 6 y$ c( \8 _3 G4 {. M9 A
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
2 T3 d8 z0 I% i6 tCorrespondence 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
?" b! M% H* a" i+ \& H9 CAbstractBackground: 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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