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:: Volume 18, Issue 2 (summer 2018) ::
J Ardabil Univ Med Sci 2018, 18(2): 173-190 Back to browse issues page
Molecular Modeling of Drug-Albumin Interactions: A case Study on Antifungal Agents
Reza Mamizadeh , Nima Razzaghi-Asl
Department of Medicinal Chemistry, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
Abstract:   (564 Views)
Background & objectives: the interaction of albumin- the most important plasma protein- with various drugs leads to variations in the pharmacokinetics of drugs. Since interaction of different pharmaceuticals with albumin is determinant in the estimation of dose and prediction of drug-drug and drug-food interferences, studying the binding ability of different drugs with albumin is an active area of research.
Methods: Docking studies were performed by Lamarckian Genetic Algorithm of AutoDock 4.2 program. The three-dimensional structures of albumin were obtained from Brookhaven protein data bank (2BXD & 2BXF; www.rcsb.org). Pre-processing of molecules was done using AM1 method and AutoDock Tools 1.5.4 software. AM1 optimization method was performed using Polak-Ribiere (conjugate gradient) algorithm with termination condition as RMS gradient of 0.1 Kcal/Å mol. Schematic representation of drug-albumin complexes were obtained by Ligplot.
Results: Oxiconazole and fenticonazole were top-ranked drugs in binding to site 1 (subdomain IIA) and 2 (subdomain IIIA) of albumin, respectively (∆Gb -9.01 and -9.89 kcal.mol-1). Leu238 and Ala291 were the key residues of site 1 due to hydrophobic contacts with all of the antifungals, while Ile388, Asn391 and Leu430 were the key residues of site 2. A few structure binding relationship rules could be extracted from the binding pattern of antifungal drugs.
Conclusion: It was found that antifungal agents might have higher affinity toward site 2 of albumin rather than site 1. Estimated high albumin affinities of antifungals provided the possibility of drug-drug or drug-food interactions. It seemed that hydrophobic contacts were more significant in binding antifungals to albumin.
 
Keywords: Drug, Antifungal, Albumin, Pharmacokinetics, Molecular Docking
Full-Text [PDF 374 kb]   (219 Downloads)    
Type of Study: article | Subject: General
Received: 2017/10/23 | Accepted: 2018/02/19 | Published: 2018/07/1
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Mamizadeh R, Razzaghi-Asl N. Molecular Modeling of Drug-Albumin Interactions: A case Study on Antifungal Agents . J Ardabil Univ Med Sci. 2018; 18 (2) :173-190
URL: http://jarums.arums.ac.ir/article-1-1428-en.html


Volume 18, Issue 2 (summer 2018) Back to browse issues page
مجله دانشگاه علوم پزشکی اردبیل Journal of Ardabil University of Medical Sciences
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