Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
3 P3 U7 ^- s' w9 Z2 F% S# eNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 8 `+ e3 F' o7 j! E/ `6 B
+ Author Affiliations9 e2 [& @0 ^ i* L( O" W
& _1 U! L, G0 y, s4 \; P+ S$ J1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
9 \2 c1 |) j# ~) s z3 e! s. j2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ( l/ O; f: W8 b+ C2 t0 r4 p7 u
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
0 |+ N+ ?, Q+ {$ U6 F$ m. Y- \, I4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
; D: d4 M$ O+ k! V5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
( P0 z6 P5 Q+ }: Z& Y0 l" }6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
- r" q2 S7 M2 u* S7Kinki University School of Medicine, Osaka 589-8511, Japan J6 H6 f/ E% [; \+ u8 P8 N! F
8Izumi Municipal Hospital, Osaka 594-0071, Japan
% h7 {2 u( p" {6 @9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
8 j" L6 _& \" A% E) |4 P! `. bCorrespondence 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
( W4 A- k/ g% {0 V! i ZAbstractBackground: 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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