Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
6 C) a) E9 x- o9 f2 l* m! B. a6 v" oNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ' c0 k5 E2 x7 \: `( }
+ Author Affiliations o9 q3 t9 U p4 L- J8 z
) W7 D( ? B8 s3 s3 |0 L" @& q7 k1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
- M8 I# t& \5 n& t% ]2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan - j$ e! ?. C8 ]7 O( V
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
2 e% {# R# l% v6 @! k4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
1 t: l, X1 T, H9 ~ ?" C% U& J5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan . I8 L; f1 V& p% M! L
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
. g& p; k2 t4 t% E- X7Kinki University School of Medicine, Osaka 589-8511, Japan
3 F0 J, R' N' ~4 O; _% B8Izumi Municipal Hospital, Osaka 594-0071, Japan ( _( X: ^- |; ]- e/ I! G
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan " A1 H+ u: t1 f" U) x7 D
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 9 X% P% P0 c. s. h5 E# N2 ^
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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