Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( @6 N- C) m! |" X+ |
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 # _8 N1 N! j! U
+ Author Affiliations8 U4 z( r$ i8 N) N$ y8 b5 u
- o' Z, ^: Z s1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
8 n- q* ]# d9 [" f8 u# g2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan $ c$ A$ ]' @5 g+ ^; {# M5 U- P. ^) V" q
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 F+ t, h L0 u+ ~7 K ?% p4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
* F3 d, \( \1 g$ ?6 p% S5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
; Y2 o& C9 \; ]1 N3 S6 v, h1 l6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
$ z% Q; l5 {- ?7 p- I7Kinki University School of Medicine, Osaka 589-8511, Japan 2 P2 J/ w: h, p: M$ v3 ]
8Izumi Municipal Hospital, Osaka 594-0071, Japan & T1 b( F' }7 W' ?; \9 n6 Y
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan / ~+ y3 u' S, g
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
, l; `4 o: z8 \: H9 yAbstractBackground: 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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