Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
, {9 T) _8 P! P+ f% K, t( i" uNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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% W Q! S; a0 r& q$ u# \1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan - j$ x: }# D4 q
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / [/ x' H8 e, I- U* V% S2 [" \+ K
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
: q$ Q- b% m+ x9 l+ ]4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan : k7 p" X6 N. ?0 K0 W: G" |% y
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 4 p }; M8 E: L' U# r1 U) h& k
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 2 d( [6 s0 Y5 h1 ~
7Kinki University School of Medicine, Osaka 589-8511, Japan
, J2 I2 J! ^# i, L8Izumi Municipal Hospital, Osaka 594-0071, Japan
3 D2 q0 V+ [" y- u5 d9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
2 {+ K' B- Q: s$ XCorrespondence 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* L; L Y8 ]; k2 L- JAbstractBackground: 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. ; [5 U: M) s" T6 F% V+ S- J
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