Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
0 ?$ F) x4 w) P/ s/ m/ VNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
& k& b) Z4 b/ f' T+ Author Affiliations; p2 c( L4 e n1 M. t
9 B; H8 X% i! I* m- u, v! Y: G- {1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan / D) T# P4 N) r0 M2 U7 c
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
3 E T! o" V! `% S7 H0 P, O3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 f" O Z$ v+ {! q! J
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan + M4 t* D. a# B' e/ t/ N
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
Y0 b7 V9 h+ f. O0 d6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 8 j5 q* s& k! I2 B8 f6 D, Z
7Kinki University School of Medicine, Osaka 589-8511, Japan 4 {9 `+ w: u' t: ~3 g
8Izumi Municipal Hospital, Osaka 594-0071, Japan ; Y0 E, B: }8 `, D( \6 O" ~) m" S/ W t
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 7 D6 W8 T8 \3 H6 V1 C1 T# a
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
5 C8 c; U9 U! ^4 sAbstractBackground: 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. 9 i8 y- V* p% \+ O! s
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