Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type4 c |- A" ^$ ^5 N- b1 o
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 2 @6 C) _* s* N( J& r/ f
+ Author Affiliations
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+ m3 k _! Z! l; y$ l- K0 A1 ~1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan s$ T1 R+ k" V; d* l6 H
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan , h0 A( e. `$ b* \! D0 m- y
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 8 O4 ]9 D% l5 R' s$ P/ \
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
5 s8 D$ D, `" n$ X1 [3 U. b5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 2 O. v! T! B2 M6 }2 P: y
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan " H& H& p0 M$ b; q8 r' _
7Kinki University School of Medicine, Osaka 589-8511, Japan & z# [" Z5 a- o1 e! S+ E# J
8Izumi Municipal Hospital, Osaka 594-0071, Japan , ?1 H/ S" [% Y0 n* I. S$ a
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 0 X5 v5 ?" ~ G) L
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
$ x$ c& b, \& U2 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.
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