Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( W3 P; S& Y1 K/ T* s
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 4 O% F" v. z9 k' Z4 X& J% W
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
( h4 \! k+ ?# X0 v* j1 T$ t3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
0 e( K) _8 |5 E0 l& h7 M8 c4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ' O2 z3 n0 {! Q* `7 W; N7 c
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
% e- E/ f" [- m" A+ r6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 9 |) g% \/ g3 D5 G7 i" O0 O
7Kinki University School of Medicine, Osaka 589-8511, Japan ( o# O3 M! U. K5 F: Z1 Y0 Y
8Izumi Municipal Hospital, Osaka 594-0071, Japan
~9 W# s! f# ~, x2 u9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
[9 O: o2 }5 g+ g; g8 ~ F9 a8 gCorrespondence 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
0 G1 Q$ m2 s6 }8 cAbstractBackground: 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. q. p2 b d8 ]0 N# _% G+ S1 X
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