Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
! v! P, i& i0 D9 E" W7 ONOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 & h3 ]6 w- l+ z
+ Author Affiliations& n0 Q/ e( v, g6 [
: j* T5 s! h9 i* w1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan + X. Z2 z$ ]5 F$ f9 W. y
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ; {- F3 E/ S6 J& n E
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ' w: q2 ^, T8 W- Z0 ^& k7 V
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
: n. k+ }, g3 w5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ; k1 [$ O- z6 c" z5 s, s. A
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan / x! b! T v% J# K- {" |
7Kinki University School of Medicine, Osaka 589-8511, Japan ) H7 X# S h% x2 x9 ?
8Izumi Municipal Hospital, Osaka 594-0071, Japan
9 m4 I- j) u/ ^9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan , q4 V& w4 c) L6 M0 b/ c
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 ' b; p- d+ N a$ i, ?3 w
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. - l" j. ]7 g# ]% O
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