Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
% I% n, j) U# x: }% qNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
- G2 M6 `: K: i# u3 e+ Author Affiliations- L& }7 ], l; h j1 ?$ Y
$ R" B+ t: P. k7 q1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
1 @5 z4 e3 \$ N: m+ ]$ `2 a$ T: s2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
6 O x9 k+ m- @+ O; N% Y3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
/ C/ P" _1 ]7 t( _5 h. Y4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ; ]! p& Z6 \( @7 W% c8 }( u% V
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
0 L% S+ r! A5 y, C! X6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 2 B _7 W+ z7 p9 N9 q" m2 X
7Kinki University School of Medicine, Osaka 589-8511, Japan
3 f8 x* R9 C3 h e8Izumi Municipal Hospital, Osaka 594-0071, Japan
' N! }4 ?! n; q2 R% p. d( O9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
$ D& `: Y8 m' e, D8 E3 o5 `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 l1 N+ X0 p; \+ WAbstractBackground: 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. + v2 X f7 r! F& q+ W
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