Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type" V# Q2 _8 t n6 ~. _
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 / m; o8 O" ~ o1 t! ^9 ~0 k o
+ Author Affiliations! V! M, X" X* O5 N( M) h( c
* y! I+ v- E# {1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 3 \3 d( R* r. i# A+ D
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
# ~" s6 `+ U) e9 `4 x; R1 J* t3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan " n: t+ Z/ E; v
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan m+ `; r7 ^8 F9 B5 z! _* D. ^
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan . z; X% c/ E: F9 `' N9 e- s* o
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ; v/ ^8 V( S6 [$ w! @! P& n
7Kinki University School of Medicine, Osaka 589-8511, Japan
9 C1 Z1 J6 p6 s0 }9 _. H- ], S8Izumi Municipal Hospital, Osaka 594-0071, Japan ) f: F3 W- x/ @( e% |
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
/ L9 H) |3 y oCorrespondence 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 ( \ H) L0 i+ s( c' w& M
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.
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