Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type, A* a! j6 k# A, }8 M5 l# ^
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
% d6 Z" R, }2 @# W+ Author Affiliations1 h8 [) s' O% w( ^' g
$ z1 ~% B( x. b' }1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
- U% q5 R9 _" a) r2 h2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 0 p3 D4 x0 N. P. G
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
: f2 Z. j) Q: i/ a1 _# Y4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 1 P: N) t) S/ r% i" S
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ' A# S+ l# e: ^# ~
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
& l; B( ~$ J( N8 B7Kinki University School of Medicine, Osaka 589-8511, Japan
$ j- e! w- c- S, Z: @6 T% M7 X3 U8Izumi Municipal Hospital, Osaka 594-0071, Japan - w7 ~" G$ b2 x# ^* o4 V8 @
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
& }6 N) x1 N! j# uCorrespondence 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 ^9 W, V/ R0 n, q" V/ I9 f$ GAbstractBackground: 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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