Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( c& q [( H! f
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 1 x8 t8 _3 F( z% r- K
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
' e) Z) x- I. ?& a. n3 j) b2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
* s$ _, Y+ z4 q7 D6 _' A9 ]3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ; Z+ A4 B4 S& n3 a, T! K2 {
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
' g! h5 k5 @: M/ U5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 1 u% i0 o- |, B5 |) J& I
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
: @4 |9 W Y( L, E1 E R7Kinki University School of Medicine, Osaka 589-8511, Japan & q2 B. w6 i, a
8Izumi Municipal Hospital, Osaka 594-0071, Japan
* \. C& n" M( e* r5 M. C9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
3 q: ~. Z& d7 j! yCorrespondence 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 ; r& D7 x- ]+ H. O/ U! U
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. , h" C& R E, ^; S& |
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