Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
* B4 t& S% K& b( ]! X% BNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 1 ^* i' l; F) b `# |! ~7 i2 D
+ Author Affiliations& A1 l7 E5 B# U: t7 S
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 7 v8 J0 z) K( [- q7 m# x
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
& ^: ^8 b4 B+ \! X" H3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ( K' q3 c9 O8 Z& F
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
- y2 U& a! t3 O! o! M) Q$ {$ C, I5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan & w6 c' |% m3 e3 ?$ m
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan % o7 F/ Y" K+ F8 \
7Kinki University School of Medicine, Osaka 589-8511, Japan ; Y) X @! w* b3 u) C
8Izumi Municipal Hospital, Osaka 594-0071, Japan ) p/ f! X O. ^& k
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
7 E2 u* y9 a$ K5 V7 _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 3 n5 f0 p& Q5 l. h* x
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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