Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
& ?% g5 c+ k( Y4 DNOBUYUKI 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 $ ^. \3 R- R4 o6 _
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan * w$ G, ]2 ^3 C: A
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ; z1 g: Y! L0 o) R8 B' O$ N
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 8 a5 c: [$ u K' c" |" t3 f
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
- v& h4 ^) u! z! u. T! ~6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ; E/ O, u$ X. `! |& }& x
7Kinki University School of Medicine, Osaka 589-8511, Japan " X4 h- w8 Q. v1 F; n2 V9 j
8Izumi Municipal Hospital, Osaka 594-0071, Japan 9 k6 W4 w$ D I9 M2 y
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
* O. N5 P- a0 [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
, Y& f, a& V2 t% }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. ) I- ` w* T6 \( C2 @5 b F, W$ k
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