Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
* f8 ?1 G0 U! V! U% J4 f1 D& Y, lNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
1 x, s0 I7 T( p8 s) d* g+ Author Affiliations+ ]9 G( h% u' a! F U
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
! G% I7 h1 b, v; t: [# S2 I2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan + s/ N3 T7 T* R# q# q2 U
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
4 d1 E7 T% O8 \/ L- }" S0 a, ^, B7 D4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
, e3 T$ p& F" f+ e5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
: e5 H8 { P' h, H `6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
- F6 F" z& k0 L7Kinki University School of Medicine, Osaka 589-8511, Japan
/ a4 r* G7 Z" n+ |+ K' `) D8Izumi Municipal Hospital, Osaka 594-0071, Japan ( {" Y; Z* R& Q. V4 m, I9 X* s
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
: a8 O& C: x# [1 I& d" kCorrespondence 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
" [7 Q# n6 Y2 X$ N- u! cAbstractBackground: 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. 0 H" r1 ?' L) k8 P& u
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