Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
/ x( J" b, G) Q. L) QNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 % G7 y6 I9 ]- t$ @9 e* X4 Z
+ Author Affiliations8 T5 g; T8 l* s x
; A. q; V. `( j: p1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan + [& ]' d" J7 X( m/ R U
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ) l$ a. ~" u4 Q' V
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % y5 s/ A7 x, G* o' `/ D( ^; n" h
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan + L6 R; L* {# Z4 r% W+ q3 `
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 5 s1 n# k% i2 H% C
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
( U& S8 }$ `! M4 @7Kinki University School of Medicine, Osaka 589-8511, Japan
4 I. H7 ?4 f+ g! S( `8Izumi Municipal Hospital, Osaka 594-0071, Japan ! Y6 ]$ e- \% |/ h! j
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
" E) q; c" p, x/ V8 c1 h. I8 D1 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 ( ~5 c; q* j2 @2 X
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. ' m t9 y& p, F. ^. b3 {. b
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