Abstract
Uncontrolled kallikrein activation is involved in diseases such as hereditary angioedema, bacterial septic shock and procedures such as cardiopulmonary bypass. Here we report a series of small molecule compounds that potently inhibit kallikrein activity in vitro. Kinetic studies indicate that some of these compounds are slow binding inhibitors of kallikrein with Ki final less than a nanomolar. The ability of these compounds to inhibit the activity of kallikrein was further confirmed in a plasma model by quantitating the release of bradykinin, an endogenous cleavage product of plasma kallikrein. To understand the inhibitory mechanism of the selected compounds toward kallikrein, the interactions between the selected compounds and kallikrein was explored using molecular modeling based on the information of crystal structures of TF/FVIIa and kallikrein. The information presented in the current study provides an initial approach to develop more selective and therapeutically useful small molecule inhibitors.
Keywords: Kallikrein, contact activation, bradykinin, inhibitor, modeling
Medicinal Chemistry
Title: Discovery of Highly Potent Small Molecule Kallikrein Inhibitors
Volume: 2 Issue: 6
Author(s): J. Zhang, R. Krishnan, C. S. Arnold, E. Mattsson, J. M. Kilpatrick, S. Bantia, A. Dehghani, B. Boudreaux, S. N. Gupta, P.L. Kotian, P. Chand and Y.S. Babu
Affiliation:
Keywords: Kallikrein, contact activation, bradykinin, inhibitor, modeling
Abstract: Uncontrolled kallikrein activation is involved in diseases such as hereditary angioedema, bacterial septic shock and procedures such as cardiopulmonary bypass. Here we report a series of small molecule compounds that potently inhibit kallikrein activity in vitro. Kinetic studies indicate that some of these compounds are slow binding inhibitors of kallikrein with Ki final less than a nanomolar. The ability of these compounds to inhibit the activity of kallikrein was further confirmed in a plasma model by quantitating the release of bradykinin, an endogenous cleavage product of plasma kallikrein. To understand the inhibitory mechanism of the selected compounds toward kallikrein, the interactions between the selected compounds and kallikrein was explored using molecular modeling based on the information of crystal structures of TF/FVIIa and kallikrein. The information presented in the current study provides an initial approach to develop more selective and therapeutically useful small molecule inhibitors.
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Zhang J., Krishnan R., Arnold S. C., Mattsson E., Kilpatrick M. J., Bantia S., Dehghani A., Boudreaux B., Gupta N. S., Kotian P.L., Chand P. and Babu Y.S., Discovery of Highly Potent Small Molecule Kallikrein Inhibitors, Medicinal Chemistry 2006; 2 (6) . https://dx.doi.org/10.2174/1573406410602060545
DOI https://dx.doi.org/10.2174/1573406410602060545 |
Print ISSN 1573-4064 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-6638 |
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