Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type4 x s+ t: X; t; G& f
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 0 j! Y N/ x/ P
+ Author Affiliations, |5 z5 l9 l( L; r
) u) L" Z5 g- J& Z# b( c1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
" ~) c K: S7 i0 Q1 A4 q: m' Z2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
( y' Z1 T3 M/ V5 s- K5 s3 u3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / B! ]/ W2 W8 B
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
8 V3 g5 T2 @( A" `) @; q5 G) K5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan " m8 ^9 l# J; [/ @$ F+ R
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
9 e+ U; w4 s& b$ {; H7Kinki University School of Medicine, Osaka 589-8511, Japan 9 c0 w" [+ c7 @1 J# T
8Izumi Municipal Hospital, Osaka 594-0071, Japan : g& h* a* b2 P8 _8 l
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 6 ]7 K$ G' g5 Y8 g$ p7 C1 c4 R
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 2 y8 w$ g# L& {; b, n' W$ Z
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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