Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
+ I! \" l2 ~9 ]: p7 GNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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$ l- A$ {6 _3 j3 q& E1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan & e( |: Y" I( N
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : q# ]* s, Y3 S* W. {# _8 L
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
+ S% @5 `- z, g4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 6 I0 b; B6 E/ t9 v; M1 E
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
. {* Y$ P: f9 [9 I6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan % S" s6 Q$ a3 P5 e5 A6 p
7Kinki University School of Medicine, Osaka 589-8511, Japan + O4 y1 ]& B2 u: C
8Izumi Municipal Hospital, Osaka 594-0071, Japan
: z9 m0 ~, O* d1 J) x3 |8 f, f9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
l' H; X; O9 S# o" r9 c4 sCorrespondence 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 & V# Q3 y4 K) X& O. b; F. Q$ I0 t
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. ) u9 `0 c$ P2 ~, y9 ]# I
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