Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type1 D8 e& @9 t+ }# Y
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 " O4 Q0 o* v# m/ x5 r- P% c. }
+ Author Affiliations
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4 \; _7 v* U" n: H+ F1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
- I1 m2 o6 O6 k2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ! o7 v5 b8 n0 N
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
% e! b8 V0 _, `/ e2 M/ e4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
# j' A, e$ D8 ^, ]1 }. c2 n, n! h5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
; u! C/ j0 t% r4 y6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
# y. p' k! L& h/ \" ^5 j0 ?; Z: ]$ {7Kinki University School of Medicine, Osaka 589-8511, Japan : V4 ^, J1 E( c. E6 |$ j3 a
8Izumi Municipal Hospital, Osaka 594-0071, Japan ' o9 ~$ @/ D; i- }9 I! p1 F% r+ k, m
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
* b K' \& c0 n1 R/ I% SCorrespondence 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, U. I$ f& @ F4 | }! Y
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. 2 T& X. r, h. K6 Q- Q8 `
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