Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
& q; L' ]. [+ o) a9 Y5 ~NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ) \7 {. u9 _# f9 i) a+ ]
+ Author Affiliations3 Z0 Z1 a2 m8 j
" y1 N- \6 x( o) E1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan . k, b6 {; _2 I6 Y" _1 |0 C7 u
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan " N) {: \4 }) }
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" m7 @1 {& O8 T! D9 b2 G* w2 y4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 8 a; V0 i, k4 d+ F% Z
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
8 f" u3 A1 o+ w* r6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ' j7 G! {/ h$ q' _& g/ p B
7Kinki University School of Medicine, Osaka 589-8511, Japan
6 R5 ]! B% Q, Z m3 ^; b0 ?8Izumi Municipal Hospital, Osaka 594-0071, Japan
. q. ]4 `; n9 |: K/ W! Q+ c+ a9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ) d+ o/ `" Y x$ k$ c
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
+ ?4 o8 P" Q0 F/ k& c2 oAbstractBackground: 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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