Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type: F& L/ X1 c- J! u
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
7 }4 X4 T, v6 J7 ?8 H$ M+ Author Affiliations& T# @! r* s9 e+ d) e, p) P
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
0 D7 `( f. q5 L- S2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
& K b: ^, f. K* c m) z, i' R4 t( L- R3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
. z7 _- ^, `2 M" Q2 y) w& q4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 2 N* I+ R$ t5 ~* v3 U3 t
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan " I3 P% W4 K8 r7 n
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
" L7 u( [8 y: s0 F+ U7Kinki University School of Medicine, Osaka 589-8511, Japan 0 B8 T; `' E- O) J
8Izumi Municipal Hospital, Osaka 594-0071, Japan 2 }( z5 M5 l& E2 k& I f! v
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
5 B; a# A* t1 i; M8 b+ U( }4 HCorrespondence 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
c8 Y$ f) `8 V" DAbstractBackground: 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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