Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
& b) E% B( B. u( D1 XNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 3 {) l$ T) P6 C7 k U/ ?
+ Author Affiliations( s$ E$ T# c+ T& |7 I3 z
2 X0 m8 M4 S! [; ` G. `& V1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan * n; }& l1 b2 {+ N& z1 ]
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
) o8 l2 q4 ?" f4 K, e/ x5 e3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan * @1 u* k( ~+ S" z
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 6 X: K5 V% t& q3 i& U6 s
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
" _5 u, ~$ L3 T6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
# B* S5 `+ k0 R9 o+ x* A2 d7 r% d7Kinki University School of Medicine, Osaka 589-8511, Japan
: h+ m A. l' W0 J; G# Z, Y" x8Izumi Municipal Hospital, Osaka 594-0071, Japan # U3 D. j/ V3 l
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
+ {" \8 q+ ^, {$ A+ o: ICorrespondence 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 j1 C, g4 Q/ E0 \
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. 5 L) `2 T4 D/ P+ m8 Z+ S6 F$ }
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