Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type p* a8 C. _* w0 R% \% j
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 3 h- L6 N& B n) i, ^" M
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan N" U8 d [6 Q G
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
8 l. q8 X. W; l2 }; ~) c" V3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ! [) K, b" Y, {/ B$ @7 R. c; i8 k/ l
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
1 t3 \, D2 h" j9 M5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ' \8 X; d; x0 o h% z8 l
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan + \/ f5 o7 J+ {) J* b ?
7Kinki University School of Medicine, Osaka 589-8511, Japan
7 G2 L L: N v6 e8Izumi Municipal Hospital, Osaka 594-0071, Japan * j! K& _ I" l, ~/ w* H* q$ n
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
" h) l% L7 b; 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 / P3 U* k$ z& i7 Z' Z, J8 }# g! U! B
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. * N; h4 l. K. j" J8 Y2 P
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