Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
4 f. e; |) {6 _NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ; x) c {+ E$ B2 y
+ Author Affiliations G; z6 @0 p1 h" Y! C0 |6 l
& A0 }5 X7 v1 H( W' }1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 4 ^4 K0 U7 k* Q1 z2 X# V1 L1 c
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
+ x: T, a, f0 N8 L/ g5 P' W; b3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
8 c: Q1 U% S% c6 ~' ]/ f4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 5 X I4 k0 L! e5 v. V, v$ y: g
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
- ]& \9 f) O: C6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
7 K% j5 e3 R, V' \4 C7Kinki University School of Medicine, Osaka 589-8511, Japan 8 }. o( a/ @6 a N* H: I
8Izumi Municipal Hospital, Osaka 594-0071, Japan 8 l0 w) K. ^2 }; A" I3 T
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 0 \3 Y N) n* I* 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
0 P, Q- _2 X% v$ s' 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. # P2 U; V+ W- [4 k
( m6 J/ M8 K9 L% A; K6 q
|