Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type1 f% Z3 i I$ J8 e- v: @* z
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan j. }: V3 P! |9 I& g: r
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 6 R) {- i9 t1 C4 E2 x
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 2 W$ F" M( D! K$ p% i
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan Q4 |7 Q8 F/ O3 c! f; T
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 7 J3 I, @1 l" r+ h5 f2 F+ |1 R$ R7 A, \$ }
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
) T" Z9 M/ U7 D, v0 Q7Kinki University School of Medicine, Osaka 589-8511, Japan
% P" D& Z. B7 x" n+ J, c8Izumi Municipal Hospital, Osaka 594-0071, Japan 5 [' v C1 c1 M8 ?
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan : g5 [" N& C- G2 k3 W$ |
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
3 X% ?4 {8 T o0 t! j, C1 iAbstractBackground: 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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