Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
) b# r- ]% E" h5 Z9 {, t+ \NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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' J- n+ E, Y, p1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
+ s" w# U* c. G9 _0 _5 a3 L2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
7 ^/ m4 F, C& A- S/ D8 ~1 v3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
6 k' O2 B( f S- a4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 7 Q* t9 d- P- R% Y/ [ P
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 7 m* T. G' F$ [. O" p; q- Q5 r, r
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
2 ~: ~: B( }/ X( ^' q( I7Kinki University School of Medicine, Osaka 589-8511, Japan + f" P/ q2 z7 ?8 B( Q" }
8Izumi Municipal Hospital, Osaka 594-0071, Japan
! }# c. ~* \6 j) m: p6 }5 p9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 1 Q1 T) T# j" z" n! {$ E+ h% 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
+ u" I, t1 g4 I, 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.
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