Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
5 h, I2 X4 _9 ]8 Q- @NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 " `' ~" R# V1 |) ] q
+ Author Affiliations
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6 {. |" s, i0 b" }' m+ ]; G1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
2 O! M4 k5 Y4 J, q0 N H9 S2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 9 R3 I) I& p; L, \* L
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
s/ ~" C2 ^/ ]0 {/ u3 _4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
+ O6 j. s$ L3 k2 K% [5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan + r0 y, @0 R+ Q {
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
, p F5 N& r( s2 S! q7Kinki University School of Medicine, Osaka 589-8511, Japan 7 \/ c; ]/ G! h# H0 W* }
8Izumi Municipal Hospital, Osaka 594-0071, Japan . ]) Q: f" Q$ `$ \6 c
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan * g9 i1 |& j6 Q
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
7 }4 m7 ] O$ {2 d; I* 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.
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