Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type1 ?, c% L6 H1 x& `1 o
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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# j' W' S" B( |5 z1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan " F5 J& W& ]' Q* d- n @8 v) O: x
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
! f& d1 T) M) @3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan + W! y. Z! @& x0 z& S0 z5 }; A
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
! {' S. U) B9 M" |5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan + R8 E$ q$ d: X5 \1 x" N
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
: ]5 {& E* d a% T) \* g( {* P# y7Kinki University School of Medicine, Osaka 589-8511, Japan
9 B u9 F8 {% x7 F7 ^! w8Izumi Municipal Hospital, Osaka 594-0071, Japan
2 u1 J _% O, Z# q: v, k, k2 @3 K2 y9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan & F; G2 w# }( `$ }% P6 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 ( N9 _; |+ Z& v$ W$ b6 S' q
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. , j5 O# ~% x) n: N3 m9 b
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