Discovery of highly potent renin inhibitors potentially interacting with the S3′ subsite of renin
摘要:
To exploit the S3' subsite of renin active site for renin inhibitor design, 42 aliskiren derivatives with modified P2' portion were designed, synthesized and biologically evaluated. Some highly potent renin inhibitors (IC50 < 3 nM) were identified, among which compounds 38 (IC50 = 0.9 nM) and 39 (IC50 = 0.7 nM) were over 2.5-fold more potent than aliskiren (IC50 = 2.3 nM). SAR analysis indicated that incorporation of polar hydrophilic moieties into the P2' portion of renin inhibitors generally enhanced the potency. Consistently with this, molecular modeling study revealed that the triazole part of 39 could provide additional interactions to the S3' subsite of renin active site. Moreover, in vivo evaluation in the double transgenic mouse hypertension model demonstrated that 39 produced greater reduction of the mean arterial blood pressure than ariskiren at the doses of 17.0 and 34.0 mu mol/kg, respectively. Taken together, the S3' subsite of renin active site merits further consideration for renin inhibitor design. (C) 2015 Elsevier Masson SAS. All rights reserved.
Synthesis, biological evaluation and docking studies of octane-carboxamide based renin inhibitors with extended segments toward S3′ site of renin
摘要:
Eighteen octane-carboxamide based renin inhibitors with extended segments for mimicking P3' unit of angiotensinogen have been synthesized. The biological evaluation identified novel renin inhibitors with more potent activity than aliskiren. Molecular docking studies showed that the extended amide-tails matched the P3' position of angiotensinogen and exerted interactions with the S3' site of renin. An unexpected pi-pi stacking interaction was observed during docking study for compound 9r, which could be a reasonable explanation for the outstanding potency of this compound. Further study is in progress to reveal a feasibility for developing novel renin inhibitors based on the possible non-classical interactions between the ligands and the new subsite of renin. (C) 2011 Elsevier Ltd. All rights reserved.