Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type: Q! k7 `" X, p6 o0 y, S
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
& }/ N0 P; f+ [: D+ Author Affiliations- J( i- K* c7 \1 w1 O
/ D( S) N" z& `" Q5 [1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ) U2 o6 \& g/ [4 T( [( c
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / @1 D& f& }( z' X
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 3 d& V2 M! @& r
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan & @2 ? }. h4 l& C1 n
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan & X3 G; e- _0 Y$ Q5 c1 r
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
( ], Y) z: h$ p0 I7Kinki University School of Medicine, Osaka 589-8511, Japan
3 n3 {* D0 y7 |, U$ W: O% v8Izumi Municipal Hospital, Osaka 594-0071, Japan
2 S+ Y) q+ P; i$ L9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 7 d# `- j$ S$ [2 x- }" k! u+ @3 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 # G" n& G* [! d' Q# K
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.
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