Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
: L0 F; @+ ~2 T' }NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
1 F9 |- l1 d3 M: u4 q+ Author Affiliations
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$ [$ i/ I$ u0 o* r9 y$ p6 h1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
& G9 j5 Z1 S e+ j( m: V4 u; @2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 R) R/ V/ W: E' R- i3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
! g X$ M" j' Z/ Z- L' D$ T4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 6 \$ a2 [$ W% h0 h- ?
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
, V! L# q4 y' K# c* s: A* J% [1 ]6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
9 S# J2 ~1 B1 V7Kinki University School of Medicine, Osaka 589-8511, Japan ! I1 b }. b+ D
8Izumi Municipal Hospital, Osaka 594-0071, Japan
- s. a6 K& ^# J6 B3 [9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
6 k, l7 n2 z. ~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 / [6 _4 t2 r" `4 c0 @" K
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. " o( i. d( @' [1 E; i: g; E
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