Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
H# B1 R0 Y; n8 w. f! q7 KNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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: x( f6 j6 _0 v' X, E$ T( b1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 3 o# ]* X3 ?4 Y3 j/ m1 }, V" R9 p
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 f8 t9 j' [/ w7 _$ ~! [0 N
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 7 }: A# D! R& h f2 N$ m" O- o
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
4 a$ k, j' z( m3 Z' L9 Z+ ?! `# Z/ Y- D5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan Z. y n+ d5 f9 w2 K
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
3 \* @0 b/ S& X& t9 }7Kinki University School of Medicine, Osaka 589-8511, Japan & P5 p: ?$ X0 h
8Izumi Municipal Hospital, Osaka 594-0071, Japan
& d7 T. c/ D) x5 i4 j5 i5 T" y0 ^9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
Z x+ @( G g3 j4 J; VCorrespondence 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 O N: {" q6 y2 q5 v. 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. , P4 [( |# v* D$ B: |3 c* v ]
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