Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type! O/ i5 U6 d7 \ X
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
; B# l/ O7 O% w0 _) |+ Author Affiliations
. S, C; j$ H' V5 J2 _, Q' }0 a- B; k; n/ |9 Y+ T
1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan " y4 A/ l F9 f8 }
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 0 Q" A$ w, ~5 _& |% b* c/ P' V% w
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan - x6 V0 n' N% p. y& H
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
- l' o9 V- i4 Y6 m" ~8 U5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
3 p3 b- j* e# w6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
/ r. P5 @: A+ n8 }/ t8 L( p7Kinki University School of Medicine, Osaka 589-8511, Japan
' u+ R- E p$ Z5 p8Izumi Municipal Hospital, Osaka 594-0071, Japan
7 @8 i9 [7 [" U! z$ [; f1 I" `9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
0 F" l) B% c5 q; X9 P$ F5 OCorrespondence 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 9 q) g+ [1 F4 l
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. ; A4 \3 R+ D4 f) N
" ^- Y" H; s( Z6 S. h |