Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
* z1 a% [% E& V* `0 b3 eNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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: M* C( e* _+ S% T) m1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
% K0 t" t5 [; E3 J2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : Q: ~% _* [' `* r! z ^3 u; o
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan + g+ U0 @; W+ |, N" R
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
5 P: o2 Y& C# V0 y& _& t5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 8 }4 p9 d% x* F! o; g% b, A: x* y
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
2 P! h4 I, `" K, e7 ?% K7Kinki University School of Medicine, Osaka 589-8511, Japan 4 W5 ]/ B. D9 p
8Izumi Municipal Hospital, Osaka 594-0071, Japan
8 {* J6 L: v' f9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan : N, @2 _5 f" U) y, W1 b; V1 g# M
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 , d1 U1 M/ H6 \
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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