Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type9 M1 ], p( F' E6 X9 Z8 B0 C
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
6 I% G6 U0 a' |2 k+ D+ Author Affiliations
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2 g B: `* e& N/ q ~8 G& F9 i. X1 [1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan q0 Q, U% N5 v4 I7 c" ^& x, G' l/ z
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 1 F4 r5 M- K+ ~* s l0 [
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
8 m$ R3 \ N( ~9 S- Q4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
: M4 f6 ?$ F/ g+ q5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan % Z' d$ ]! B! _5 s
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 7 ~, f/ M, t# Z; I4 k4 h" U
7Kinki University School of Medicine, Osaka 589-8511, Japan 0 |: H& a6 G6 W' b# L
8Izumi Municipal Hospital, Osaka 594-0071, Japan 4 E- L& e) T" W' V6 w$ J
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
' k+ [5 ]) ?! E9 @" E+ PCorrespondence 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 * W4 P$ ]9 N) S6 }9 o
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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