Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
8 ]% F( F8 O4 m0 |& z' rNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 4 O2 M! @4 X# ]3 T6 [
+ Author Affiliations* \" Y) p z4 I! e: E) T) i! K. v& J- B
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan * {, S. Y( l: G9 Q. P+ R1 ]
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan . ~4 y& n2 k' q1 P Y1 n5 o- s
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ( n: w, e) o3 G$ n
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
. Y' v% A4 ~. l; l; p- A5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
% {0 q. N( a5 q. N/ C. J8 E6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
! j O1 L, i3 A# Y+ V# S4 {7Kinki University School of Medicine, Osaka 589-8511, Japan
8 i9 t% t0 V3 L9 g8Izumi Municipal Hospital, Osaka 594-0071, Japan # j c# v2 A5 B& g5 ^- _+ s
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
, g n3 O& b9 GCorrespondence 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 9 R" B4 \7 `, x
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. 2 R& D" k5 N) p. W% _2 d. x! e
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