Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type" L+ `9 r4 L% ]; _6 D: G" i5 e
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
' F+ T: D7 |5 B+ Author Affiliations
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' [; r4 w& i P1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
0 y- H% d4 v+ R! j2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 }! @. c. V7 q- K) I
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan + \! A6 B6 }" b7 ~) V
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan + z6 {, i3 \5 B7 ~) |. G9 u
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
& W$ H6 E+ f9 K Q6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
* P7 ^% q/ [3 \8 C9 S% E/ \7Kinki University School of Medicine, Osaka 589-8511, Japan / [( O* U8 M7 S* g" |% e, e
8Izumi Municipal Hospital, Osaka 594-0071, Japan
0 S! V+ {0 b0 P+ y2 E9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 9 r" Y# c, e6 c3 n. W d5 @
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 & |7 j" B7 I0 p0 N
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. 8 E9 n0 x# S( Y# q
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