Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
" b0 j% H) ^' BNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
5 `5 ]6 @& J% n- [+ Z& h+ Author Affiliations8 k6 G3 r; O3 X" ~9 Q
9 I% G4 X. q8 V8 ~' \- I1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
+ ^! H. t1 k# w! P2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 7 s; U6 M0 a [5 F+ Z. ?/ o8 T6 R
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
9 X3 p% `+ L H5 Z4 o% i! z, P4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ) l0 X6 V% I+ T$ t8 k
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ; P \. w, D% y |. G
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
+ x" {# n% h; B( X7Kinki University School of Medicine, Osaka 589-8511, Japan 2 x6 {% e( b$ M9 e N6 V/ C
8Izumi Municipal Hospital, Osaka 594-0071, Japan , C" z( ?% u2 n7 I# d# r6 E
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan $ y9 ]) m! H+ w& y/ L# z
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
* f/ y- `9 e4 [; r, xAbstractBackground: 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. ) K2 s# N# K9 T/ Y, J9 Z. n' E$ B8 W
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