Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type$ {7 O# L9 |/ I
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 7 g2 o( Q" V# ^: h8 r
+ Author Affiliations( u$ k: `" c+ x$ X
1 F1 Y( U E9 \) X% a/ D1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
- N; v" T1 `6 J$ M9 O+ f2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
# K1 ^# l3 T a# u4 W: `3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 9 G' o0 d8 e( ^6 R4 B. z
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 9 N, n: o; N% _1 X- i* N1 o- e& @
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ( m$ g4 z r/ {* Q
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan / d; V; ]# _# x6 m- M! [
7Kinki University School of Medicine, Osaka 589-8511, Japan
, ]$ y9 l" R! A( G1 Z8Izumi Municipal Hospital, Osaka 594-0071, Japan 0 |% f. k9 [& }! h: P* k. L, {
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
) r' w, D( z5 L; n7 ~# aCorrespondence 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 . _+ m0 ]. S6 A1 O
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. ( t5 {' w% t5 L" f7 }
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