Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( |( ^) Z3 ], @
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ; t$ T- ~- O+ @3 n( B# s
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % X$ H, S# h+ z( z; W0 W8 W
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
# m4 {3 [' I$ {) B" T! d4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ; A0 c2 o# I! Q: z: s- _& h5 L5 X
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 3 p2 N. c! @1 f- D0 j& j+ x' H G% e
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 9 d" ~( ?! K2 f! E1 ^8 J! C# q
7Kinki University School of Medicine, Osaka 589-8511, Japan 9 \# m8 s% I( f- r
8Izumi Municipal Hospital, Osaka 594-0071, Japan
* i$ ^2 V/ Z/ Q& s: e9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan # O8 s( _& ~5 d3 A) g$ H
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 - `! D" n {9 k$ p0 W
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. 1 o- H/ a$ C! c5 U+ x5 ~
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