Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type1 T$ O" E: |2 q- `
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
3 N7 w8 M% Q8 {5 L: G3 N+ ^2 i+ Author Affiliations. s& t( i9 J- T, |. Y6 n
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
9 k" t& L4 M8 X+ ^ c5 ~6 A' ?6 n' O4 k2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
6 r9 F; I/ ~ y) W, [$ e: T2 U3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : @" h0 |8 n* {
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
1 {4 r+ S; f2 C& D5 W/ A5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
+ |9 h/ e+ \; ^6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
2 y# L& y% ?3 M0 x7Kinki University School of Medicine, Osaka 589-8511, Japan 5 z: }5 t$ _, F$ A
8Izumi Municipal Hospital, Osaka 594-0071, Japan
9 ^ s& T$ D) a; M9 R" z9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
' S) P( }- y' s) j; T3 l+ v4 MCorrespondence 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 % O0 \# [( M9 |7 k+ A: N$ `: @5 {( a% s
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.
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