Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
' i) K) s' m& \2 d D: d) w' {* `NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 9 B1 T# n! }# q' F; X, y
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
# F$ Z" V0 ?; n; S. Y7 d3 ]: K2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 7 v# H' V1 L4 w" V/ L4 ~
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ! l4 u5 w' v! @
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan " F$ z l) x# X" m% \! Z8 H
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan - O+ t9 l- n. j7 }/ E
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
& D; J; ?$ X* U5 e+ n& \7Kinki University School of Medicine, Osaka 589-8511, Japan . d& P1 o; s6 E2 r1 E! M
8Izumi Municipal Hospital, Osaka 594-0071, Japan
4 l* n2 q. [. {) X j9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
7 {3 v/ b2 @9 n b& lCorrespondence 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
* C* Y i+ e- h3 |/ W. x' 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.
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