Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type( k6 h" s5 z+ P+ u2 Z
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
/ x! d+ z9 ] B9 K) b+ Author Affiliations
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; l# }2 R& p2 f- l9 M: G1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
1 y2 Z, t, ? f; S& n( m5 c2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
- z) S) [3 e' ~ O3 Q; J$ R" [3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan # n) I' Y& x& @
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 9 S! B& O) `+ [5 d
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 7 \$ y0 u5 ]# u4 |0 T4 P: {3 M* @! G3 s
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
+ y1 E# H8 U) j& a7 c [7Kinki University School of Medicine, Osaka 589-8511, Japan
$ K' b/ T8 Q0 I/ f8Izumi Municipal Hospital, Osaka 594-0071, Japan + w( M2 W; @9 k1 |2 X
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan - c; D1 | l; [
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
6 j, y7 V4 i% j7 h& G/ 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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