Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
. }3 ^. q9 E0 ]. j+ PNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 , h, S! P; }" D" v( C- s" X$ A
+ Author Affiliations& k7 T ?, O2 p; T% s0 ^
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
& Z1 ]1 O* [& V2 T! a: O+ v5 T* ~( C2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
7 u3 B0 B# D' @+ a3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ; J- b. W7 a% Z+ u, O! A
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
4 y* U- U, {# h) K9 @/ B4 M) E! }5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan . Q! m( ]1 \0 \% D/ L+ O3 ^! o
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
9 k4 ?. e9 o8 P: T7Kinki University School of Medicine, Osaka 589-8511, Japan
6 B8 t$ m5 E) T0 M' v+ ?/ s8Izumi Municipal Hospital, Osaka 594-0071, Japan
9 O& U6 p, I+ W M5 r9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 3 I: _6 S, U) W3 I& I
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 4 P6 N4 n5 K3 w. e4 z9 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.
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