Protein Information

Name prolyl dipeptidase DPP8
Synonyms DP8; DPP 8; DPP8; DPRP 1; DPRP1; Dipeptidyl peptidase 8; Dipeptidyl peptidase IV related protein 1; Dipeptidyl peptidase VIII…

Compound Information

Name piperazine
CAS piperazine

Reference List

PubMed Abstract RScore(About this table)
15664838 Jiaang WT, Chen YS, Hsu T, Wu SH, Chien CH, Chang CN, Chang SP, Lee SJ, Chen X: Novel isoindoline compounds for potent and selective inhibition of prolyl dipeptidase DPP8. Bioorg Med Chem Lett. 2005 Feb 1;15(3):687-91.

Isoindoline with a 1-(4,4'-difluor-benzhydryl)-piperazine group at the P2 site was observed to be a very potent DPP8 inhibitor, having an IC (50) value of 14nM with at least a 2500-fold selectivity over either DPP-IV or DPP-II.
36(0,1,1,6) Details
17352677 Thornberry NA, Weber AE: Discovery of JANUVIA (Sitagliptin), a selective dipeptidyl peptidase IV inhibitor for the treatment of type 2 diabetes. Curr Top Med Chem. 2007;7(6):557-68.

The observation that both compounds inhibit the related proline peptidases DPP8 and DPP9 led to the hypothesis that inhibition of DPP8 and/or DPP9 could evoke severe toxicities in preclinical species.
Initial work in an alpha-amino acid series related to isoleucyl thiazolidide was discontinued due to lack of selectivity; however, SAR studies on two screening leads led to the identification of a highly selective beta-amino acid piperazine series.
1(0,0,0,1) Details