Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
6 v' K% o2 G/ G3 G. o/ R: m p8 nNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 3 a0 Q1 h" K2 K$ q9 t
+ Author Affiliations
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6 G' @# E/ T' x; p1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
# F0 l4 Z) m1 }" i O% \$ s2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 ]( E! Y; `7 a! j N3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
/ }/ o- j' f" d7 m. p0 c9 X( c4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
$ O; y) ]* I( h) ], }4 Q% l+ g5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
4 S. D/ g5 D! ~& L9 l6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
* \: i( y5 _3 r% f' E7Kinki University School of Medicine, Osaka 589-8511, Japan
6 Z4 \$ B4 ]+ M+ G$ V: V# T8Izumi Municipal Hospital, Osaka 594-0071, Japan : K9 g* H- i5 @0 G% ^! A
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan , O+ e: F$ I* G3 T. b% c% 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
- A% y: w; H2 O/ fAbstractBackground: 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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