Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
& _+ m, d; l9 ^. INOBUYUKI 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 % N9 t! o8 G% u4 q
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan - O/ r# b0 w! z& n" K
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
7 S( W, b" x; j3 Z, i4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan / a' L+ w0 b) e8 t
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan * f& Q! Z% u% z; `2 Y
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
# i3 B+ e e% n7Kinki University School of Medicine, Osaka 589-8511, Japan : H$ [3 g+ T5 p
8Izumi Municipal Hospital, Osaka 594-0071, Japan 0 M3 l# Y2 T; q6 K4 q
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan _8 Y3 D; T* |
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
- R2 ]) X, @. z yAbstractBackground: 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. 0 [3 V" c8 O4 w, q1 a8 L! e
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