Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( G0 {# q, b* C
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
% Y1 d1 Y* N$ Y6 q+ Author Affiliations
+ n8 _: D2 S$ f7 i' a$ N# Y+ f; k& B& A( Y
1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ( W: c( Y$ H9 ~+ I& d7 A
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 {0 q" A* J+ a0 v/ e3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan , S$ o$ {: X( f# Y
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
2 x9 f7 E: E/ K, y5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 0 v9 N# m) ^5 T* f% z! }; U" W
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 1 r: ^" s* S6 v7 i2 k
7Kinki University School of Medicine, Osaka 589-8511, Japan
( ]8 R) r& \ s' ]! w- m9 o8Izumi Municipal Hospital, Osaka 594-0071, Japan + `! D8 S. h* x: q9 V
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
! G; @! i5 l( |: V8 C- P) p1 WCorrespondence 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 ) f+ b: Y5 R* D, u. V
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.
& P- Z/ @; E6 V6 J: |+ q: [/ V! ~3 }* u3 N0 V
|