Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
# e8 e/ M" z' a, P; {4 DNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 * f7 ]1 ~9 H$ T
+ Author Affiliations' r2 A: [& _/ M. R1 K$ e5 Z* I) k
: P0 F2 T- i! q1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
4 `2 h7 i0 S7 D/ ?4 a" {2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % f& A8 _% I0 Q4 h3 S3 m
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
0 E8 F# o8 u- G& G% g4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
# ?' D/ S* @ @/ I+ D J3 S' Y5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan # f+ @) ^ k! z6 n
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 6 k1 R5 C# A5 \/ o( R
7Kinki University School of Medicine, Osaka 589-8511, Japan
) o% W! z& U7 n3 k" s! A/ }9 X8Izumi Municipal Hospital, Osaka 594-0071, Japan
9 B9 G; _0 |' B- X+ u- X. N; m9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 0 j7 V6 f+ V$ q, |) q" {2 i
Correspondence 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 ! S- h4 l+ v. Y7 ^1 P
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.
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