Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
v$ Q" [+ D! b$ ]NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 ! \: p3 L( {% ]7 a8 f
+ Author Affiliations
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9 p$ D. B4 ]; W8 z% ]1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
/ [2 n# N1 o' [. j" o- ?2 s U$ Z2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 4 C: m" I% {! v' f2 E5 q1 H
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
q- @" m) \3 O& w4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan , A( H* b! K+ k
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
' \1 A g& c! P3 p/ B) ~2 Z6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
( b# B, |/ J* y, a" |7Kinki University School of Medicine, Osaka 589-8511, Japan 8 Y# G s8 q5 X- w2 V- T) p
8Izumi Municipal Hospital, Osaka 594-0071, Japan $ b) a( a* i \) e! k0 s
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
* w, D! L# N# TCorrespondence 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
& f9 h* y% H+ x" T: o7 d1 VAbstractBackground: 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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