Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
# `1 ^3 |3 O7 sNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
, ~+ n- o2 E6 G h6 \- ]2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
, q% y3 K- b; |: p: O* v3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
1 ?, J2 G) T3 ~( `8 a3 o7 H4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
( A) q9 C" x* t3 ~% J9 x4 d5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan % @8 o3 Z! S, s( R4 V- \2 q
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 1 q0 F5 p% [2 F5 ~
7Kinki University School of Medicine, Osaka 589-8511, Japan . s- J5 R; O8 L% f- Q9 r
8Izumi Municipal Hospital, Osaka 594-0071, Japan 7 v# S; }! `8 n* S9 _: S, V
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
" j3 R$ a( V) |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 ; S) w' `4 e* e4 r1 v, r
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. 4 ]" c+ u) p% `7 z9 s0 y, o
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