Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
# m2 ~' ?5 b$ [. I# v$ hNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
; n, I& I4 x; B3 m+ Author Affiliations* j; _) V5 Y- c4 q% f1 A# O" |) q, e# P
: Z- Q# a6 A2 F3 R1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 6 E( {' A- ]* D9 A0 A! Z: f3 l
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
$ r( w8 W" Q @, c; j( N+ ~" K& T3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / }. Q% I- d3 v6 z4 I
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
) H- s# ?/ Q5 |+ R/ y9 P5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
' Y1 z. j2 S+ j' ~6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
/ y, \7 X$ o5 X1 V$ p* }3 Y7 _7Kinki University School of Medicine, Osaka 589-8511, Japan
7 k/ x+ ?3 Y! G2 _$ a& O1 w8Izumi Municipal Hospital, Osaka 594-0071, Japan
; C5 a2 C" j+ V3 ~# c" N9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
/ i7 j8 S, w, U8 z5 L; rCorrespondence 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
/ N0 O! K8 m8 HAbstractBackground: 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. - j0 F' D6 o" P
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