Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type ]& d. F |) H: ^
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 # C, V; w. S3 \( x/ F0 m
+ Author Affiliations6 D5 o1 t2 k4 a, U
. D8 |- H9 R0 L: M8 w" B( v1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 7 x1 ]4 Z5 I$ k- z }# x5 F' N
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 [% k5 O2 z, P! r3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ' N# L7 `- {! I3 \) f3 ^$ q
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
; v- o; @9 g" Q5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 4 T" g6 C6 S/ U3 ~
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 7 j* [; n3 q5 w& _
7Kinki University School of Medicine, Osaka 589-8511, Japan $ X. k. q, z# ?
8Izumi Municipal Hospital, Osaka 594-0071, Japan 1 m( V" c/ b" f! h: J
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
' E) l* Y5 D" i: x" kCorrespondence 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
6 R! E' z$ r% QAbstractBackground: 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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