Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
& ^* R7 r% | ~0 p6 M) W8 |6 q [* QNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ( S, U& ~2 |( m' Z
+ Author Affiliations
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' J8 s+ U/ j1 H- P1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 6 p1 K6 W% Q! {- r
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
& x% g0 u) E i6 s* C1 Y3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
! D# N H, w) ^ B4 T4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan & Q/ }- [9 H# G! c
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 9 i, z2 O) f; R9 g- w7 A! n
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
# F4 A7 `" e: ~- O9 n7Kinki University School of Medicine, Osaka 589-8511, Japan
9 h3 L2 Y- o, n+ o( e3 Z1 Q8Izumi Municipal Hospital, Osaka 594-0071, Japan
! Z J# U8 |& A5 N6 g+ P [ n7 h9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
/ z/ v2 m# {0 ]6 P' \* zCorrespondence 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
5 l. A, B. r0 f3 T: u9 r3 kAbstractBackground: 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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