Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type+ L/ j" o" B! a: |. {8 ?$ s: _
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
9 k* W* k* E: A+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
: Q; N7 C6 F, L: v M4 k/ A/ v2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 U x X/ |7 c# V$ j4 t3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
G. F7 W8 C; M$ y# q4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan & ~) s! K9 D* e. w) B( L
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
# |$ X9 J$ `; ^. I) o$ @+ r6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 7 r( v- `* D2 v/ Z4 e# d
7Kinki University School of Medicine, Osaka 589-8511, Japan
2 G: F( z/ K7 G' f8Izumi Municipal Hospital, Osaka 594-0071, Japan % y9 y& U4 J ?6 E1 ]
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
. W- A* n1 O& u# lCorrespondence 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 - s/ [* d0 R' F! J
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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