Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
& A0 L% W) v4 d5 f$ t, m7 I2 v# ANOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 , o& x& w5 L' E g
+ Author Affiliations2 z i* u" R1 v6 p. o
( d5 G2 ]( F# B) C' U% k9 q1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan : k; a. `) N0 N
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
- c, y5 S0 A4 L0 q3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
) Z$ E4 S& n2 y* B$ k4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 8 f9 a% h5 |4 x: W: X. f
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
3 q% J1 B- |/ O9 u9 f j6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
/ Q; s& N" K$ V6 i3 Z7Kinki University School of Medicine, Osaka 589-8511, Japan
' Q. p7 S! r) Q( V( u8Izumi Municipal Hospital, Osaka 594-0071, Japan
. U. Q0 j1 z9 R7 w q- Z$ d/ {: V; V9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
, ?: J" z. }% G; |6 ?; a' i# J* yCorrespondence 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
2 v0 V, h% U# j% N% v& M+ W' ~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. ' r6 r% s- j% q ]( V6 }4 P2 k$ S9 C
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