Abstract:
:Fibroblast activation protein (FAP) belongs to the prolyl peptidase family. FAP inhibition is expected to become a new antitumor target. Most known FAP inhibitors often resemble the dipeptide cleavage products, with a boroproline at the P1 site; however, these inhibitors also inhibit DPP-IV, DPP-II, DPP8, and DPP9. Potent and selective FAP inhibitor is needed in evaluating that FAP as a therapeutic target. Therefore, it is important to develop selective FAP inhibitors for the use of target validation. To achieve this, optimization of the nonselective DPP-IV inhibitor 8 led to the discovery of a new class of substituted 4-carboxymethylpyroglutamic acid diamides as FAP inhibitors. SAR studies resulted in a number of FAP inhibitors having IC(50) of <100 nM with excellent selectivity over DPP-IV, DPP-II, DPP8, and DPP9 (IC(50) > 100 μM). Compounds 18a, 18b, and 19 are the only known potent and selective FAP inhibitors, which prompts us to further study the physiological role of FAP.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Tsai TY,Yeh TK,Chen X,Hsu T,Jao YC,Huang CH,Song JS,Huang YC,Chien CH,Chiu JH,Yen SC,Tang HK,Chao YS,Jiaang WTdoi
10.1021/jm1002556subject
Has Abstractpub_date
2010-09-23 00:00:00pages
6572-83issue
18eissn
0022-2623issn
1520-4804journal_volume
53pub_type
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