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Brown AP, Friedrichs GS, Tang HM, Traebert M, Weber V, Yao N, Yan GX. Electrophysiological Changes in the Rabbit Ventricular Wedge and Human-Induced Pluripotent Stem-Cell Derived (IPSC) Cardiomyocytes Translate to Severe Arrhythmia Observed in a Canine Toxicology Study, Not Predicted by Standard In Vitro Ion Channel Assays. Int J Toxicol 2024; 43:231-242. [PMID: 38327194 DOI: 10.1177/10915818241230900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
During drug discovery, small molecules are typically assayed in vitro for secondary pharmacology effects, which include ion channels relevant to cardiac electrophysiology. Compound A was an irreversible inhibitor of myeloperoxidase investigated for the treatment of peripheral artery disease. Oral doses in dogs at ≥5 mg/kg resulted in cardiac arrhythmias in a dose-dependent manner (at Cmax, free ≥1.53 μM) that progressed in severity with time. Nevertheless, a panel of 13 different cardiac ion channel (K, Na, and Ca) assays, including hERG, failed to identify pharmacologic risks of the molecule. Compound A and a related Compound B were evaluated for electrophysiological effects in the isolated rabbit ventricular wedge assay. Compounds A and B prolonged QT and Tp-e intervals at ≥1 and ≥.3 μM, respectively, and both prolonged QRS at ≥5 μM. Compound A produced early after depolarizations and premature ventricular complexes at ≥5 μM. These data indicate both compounds may be modulating hERG (Ikr) and Nav1.5 ion channels. In human IPSC cardiomyocytes, Compounds A and B prolonged field potential duration at ≥3 μM and induced cellular dysrhythmia at ≥10 and ≥3 μM, respectively. In a rat toxicology study, heart tissue: plasma concentration ratios for Compound A were ≥19X at 24 hours post-dose, indicating significant tissue distribution. In conclusion, in vitro ion channel assays may not always identify cardiovascular electrophysiological risks observed in vivo, which can be affected by tissue drug distribution. Risk for arrhythmia may increase with a "trappable" ion channel inhibitor, particularly if cardiac tissue drug levels achieve a critical threshold for pharmacologic effects.
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Affiliation(s)
- Alan P Brown
- Novartis Biomedical Research, Cambridge, MA, USA
| | | | | | | | | | - Nancy Yao
- Novartis Biomedical Research, East Hanover, NJ, USA
| | - Gan-Xin Yan
- Lankenau Institute for Medical Research, Wynnewood, PA, USA
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2
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Regard JB, Harrison TJ, Axford J, Axford L, Lee L, Ren X, Deng L, Reynolds A, Mao J, Liu Q, Patnaik A, Cohick E, Hollis-Symynkywicz M, Loi S, Riek S, McKeever U, Dunstan D, Sung M, Ware NF, Brown AP, Hamann LG, Marcinkeviciene J, Patterson AW, Marro ML. Discovery of a novel, highly potent and orally bioavailable pyrrolidinone indole series of irreversible Myeloperoxidase (MPO) inhibitors. Biochem Pharmacol 2023; 209:115418. [PMID: 36693437 DOI: 10.1016/j.bcp.2023.115418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 01/13/2023] [Accepted: 01/17/2023] [Indexed: 01/22/2023]
Abstract
Myeloperoxidase (MPO) is a heme-containing peroxidase from phagocytic cells, which plays an important role in the innate immune response. The primary anti-microbial function of MPO is achieved by catalyzing the oxidation of halides by hydrogen peroxide (H2O2). Upon activation of phagocytes, MPO activity is detectable in both phagosomes and extracellularly, where it can remain or transcytose into interstitial compartments. Activated MPO leads to oxidative stress and tissue damage in many inflammatory states, including cardiovascular disease. Starting from a low molecular weight (LMW) high throughput screening (HTS) hit, here we report the discovery of a novel pyrrolidinone indole (IN-4) as a highly potent MPO inhibitor. This compound displays similar in vitro potency across peroxidation, plasma and NETosis assays. In a dilution/dialysis study, <5% of the original MPO activity was detected post-incubation of MPO with IN-4, suggesting irreversible enzyme inhibition. A fast MPO inactivation rate (kinact/Ki) and low partition ratio (k3/k4) make IN-4 kinetic properties attractive for an MPO inhibitor. This compound also displays significant selectivity over the closely related thyroid peroxidase (TPO), and is selective for extracellular MPO over intracellular (neutrophil) MPO. Moreover, IN-4 shows good exposure, low clearance and high oral bioavailability in mice, rats and dogs. The high in vitro MPO activity and high oral exposure observed with IN-4 result in a dose-dependent inhibition of MPO activity in three mouse models of inflammation. In conclusion, IN-4 is a novel, potent, mechanism-based and selective MPO inhibitor, which may be used as superior therapeutic agent to treat multiple inflammatory conditions, including cardiovascular disease.
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Affiliation(s)
- Jean B Regard
- Cardiovascular and Metabolic Diseases, Cambridge, MA, USA
| | | | - Jake Axford
- Global Discovery Chemistry, Cambridge, MA, USA
| | - Laura Axford
- Cardiovascular and Metabolic Diseases, Cambridge, MA, USA.
| | - Lac Lee
- Cardiovascular and Metabolic Diseases, Cambridge, MA, USA
| | - Xianglin Ren
- Cardiovascular and Metabolic Diseases, Cambridge, MA, USA
| | | | | | - Justin Mao
- Global Discovery Chemistry, Cambridge, MA, USA
| | - Qian Liu
- Global Discovery Chemistry, Cambridge, MA, USA
| | | | - Evan Cohick
- Cardiovascular and Metabolic Diseases, Cambridge, MA, USA
| | | | - Sally Loi
- Cardiovascular and Metabolic Diseases, Cambridge, MA, USA
| | - Simone Riek
- Novartis Institutes for BioMedical Research, Autoimmunity, Transplantation and Inflammation, Switzlerland
| | - Una McKeever
- Novartis Institutes for BioMedical Research, Autoimmunity, Transplantation and Inflammation, Switzlerland
| | | | - MooJe Sung
- Global Discovery Chemistry, Cambridge, MA, USA
| | | | - Alan P Brown
- Preclinical Safety, Novartis Institutes for BioMedical Research, Fabrikstrasse 2 Novartis Campus, Basel CH-4056, Switzerland
| | | | | | | | - Martin L Marro
- Cardiovascular and Metabolic Diseases, Cambridge, MA, USA
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3
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Vaezi Z, Asadzadeh Aghdaei H, Sedghi M, Mahdavian R, Molakarimi M, Hashemi N, Naderi-Manesh H. Hemoglobin bio-adhesive nanoparticles as a colon-specific delivery system for sustained release of 5-aminosalicylic acid in the effective treatment of inflammatory bowel disease. Int J Pharm 2022; 616:121531. [PMID: 35121044 DOI: 10.1016/j.ijpharm.2022.121531] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/24/2022] [Accepted: 01/27/2022] [Indexed: 10/19/2022]
Abstract
A colonic drug delivery system was developed to specifically deliver 5-aminosalicylic acid (5-ASA) to the inflamed site by conjugating with hemoglobin nanoparticles (HbNPs). The 5-ASA-HbNPs (eight 5-ASA molecules per Hb molecule) with the size of 220 nm and zeta potential of -14.6 mV is a tailored nanoparticle able to pass through the mucus layer. The 5-ASA-HbNPs do not undergo chemical and enzymatic hydrolysis in the simulated gastrointestinal fluids over 6 h. Significantly higher cellular uptakes and prolonged release was seen for the 5-ASA-HbNPs in Caco-2 cells, compared to free 5-ASA over 72 h. In addition, 5-ASA-HbNPs revealed similar therapeutic effectiveness with free 5-ASA against tumor necrosis factor and showed less inhibitory concentration (IC50) for myeloperoxidase enzyme activity. In vivo imaging of mouse demonstrated the localization of drug in the descending colon after oral administration and about 15% of the administered dose was recovered as 5-ASA from urine in 6 h. The use of these nanoparticles with the mucus adhesion properties and permeability to intestinal epithelial cells can be a good candidate with potential application in the colonic drug delivery field.
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Affiliation(s)
- Zahra Vaezi
- Department of Bioactive Compounds, Faculty of Interdisciplinary Science and Technologies, Tarbiat Modares University, 14115-154 Tehran, Iran; Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, P.O.BOX: 1985717411, Tehran, Iran.
| | - Hamid Asadzadeh Aghdaei
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, P.O.BOX: 1985717411, Tehran, Iran.
| | - Mosslim Sedghi
- Department of Biophysics, Faculty of Biological Science, Tarbiat Modares University, 14115-154 Tehran, Iran
| | - Reza Mahdavian
- Department of Biophysics, Faculty of Biological Science, Tarbiat Modares University, 14115-154 Tehran, Iran
| | - Maryam Molakarimi
- Department of Biochemistry, Faculty of Biological Science, Tarbiat Modares University, 14115-154 Tehran, Iran
| | - Naimeh Hashemi
- Ludwig Boltzmann Institute for Traumatology, Research Centre in coopoeration with AUVA, DonaueschingenstraBe 13, 1200 Vienna, Austria
| | - Hossein Naderi-Manesh
- Department of Bioactive Compounds, Faculty of Interdisciplinary Science and Technologies, Tarbiat Modares University, 14115-154 Tehran, Iran; Department of Biophysics, Faculty of Biological Science, Tarbiat Modares University, 14115-154 Tehran, Iran.
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4
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Valadez-Cosmes P, Raftopoulou S, Mihalic ZN, Marsche G, Kargl J. Myeloperoxidase: Growing importance in cancer pathogenesis and potential drug target. Pharmacol Ther 2021; 236:108052. [PMID: 34890688 DOI: 10.1016/j.pharmthera.2021.108052] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 11/24/2021] [Accepted: 12/02/2021] [Indexed: 02/07/2023]
Abstract
Myeloperoxidase is a heme-peroxidase which makes up approximately 5% of the total dry cell weight of neutrophils where it is predominantly found in the primary (azurophilic) granules. Other cell types, such as monocytes and certain macrophage subpopulations also contain myeloperoxidase, but to a much lesser extent. Initially, the function of myeloperoxidase had been mainly associated with its ability as a catalyzer of reactive oxidants that help to clear pathogens. However, over the past years non-canonical functions of myeloperoxidase have been described both in health and disease. Attention has been specially focused on inflammatory diseases, in which an exacerbate infiltration of leukocytes can favor a poorly-controlled production and release of myeloperoxidase and its oxidants. There is compelling evidence that myeloperoxidase derived oxidants contribute to tissue damage and the development and propagation of acute and chronic vascular inflammation. Recently, neutrophils have attracted much attention within the large diversity of innate immune cells that are part of the tumor microenvironment. In particular, neutrophil-derived myeloperoxidase may play an important role in cancer development and progression. This review article aims to provide a comprehensive overview of the roles of myeloperoxidase in the development and progression of cancer. We propose future research approaches and explore prospects of inhibiting myeloperoxidase as a strategy to fight against cancer.
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Affiliation(s)
- Paulina Valadez-Cosmes
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, Graz, Austria
| | - Sofia Raftopoulou
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, Graz, Austria
| | - Zala Nikita Mihalic
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, Graz, Austria
| | - Gunther Marsche
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, Graz, Austria
| | - Julia Kargl
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, Graz, Austria.
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5
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Matos IDA, da Costa Júnior NB, Meotti FC. Integration of an Inhibitor-like Rule and Structure-based Virtual Screening for the Discovery of Novel Myeloperoxidase Inhibitors. J Chem Inf Model 2020; 60:6408-6418. [PMID: 33270445 DOI: 10.1021/acs.jcim.0c00813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Myeloperoxidase (MPO) is an attractive therapeutic target against inflammation. Herein, we developed an inhibitor-like rule, based on known MPO inhibitors, and generated a target database containing 6546 molecules with privileged inhibitory properties. Using a structure-based approach validated by decoys, robust statistical metrics, redocking, and cross-docking, we selected 10 putative MPO inhibitors with high chemical diversity. At 20 μM, six of these 10 compounds (i.e., 60% success rate) inhibited more than 20% of the chlorinating activity of the enzyme. Additionally, we found that compound ZINC9089086 forms hydrogen bonds with Arg233 and with the hemic carboxylate. It makes a π-stacking interaction with the heme group and displays a high affinity for the enzyme active site. When incubated with purified MPO, ZINC9089086 inhibited the chlorinating activity of the enzyme with an IC50 of 2.2 ± 0.1 μM in a reversible manner. Subsequent experiments revealed that ZINC9089086 inhibited hypochlorous acid production in dHL-60 cells and human neutrophils. Furthermore, the theoretical ADME/Tox profile indicated that this compound exhibits low toxicity risks and adequate pharmacokinetic parameters, thus making ZINC9089086 a very promising candidate for preclinical anti-inflammatory studies. Overall, our study shows that integrating an inhibitor-like rule with a validated structure-based methodology is an excellent approach for improving the success rate and molecular diversity of novel MPO inhibitors with good pharmacokinetics and toxicological profiles. By combining these tools, it was possible to increase the assurance rate, which ultimately diminishes the costs and time needed for the acquisition, synthesis, and evaluation of new compounds.
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Affiliation(s)
- Isaac de Araújo Matos
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, 05508-000, Brazil
| | | | - Flavia Carla Meotti
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, 05508-000, Brazil
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6
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Myeloperoxidase: A versatile mediator of endothelial dysfunction and therapeutic target during cardiovascular disease. Pharmacol Ther 2020; 221:107711. [PMID: 33137376 DOI: 10.1016/j.pharmthera.2020.107711] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 10/01/2020] [Indexed: 02/06/2023]
Abstract
Myeloperoxidase (MPO) is a prominent mammalian heme peroxidase and a fundamental component of the innate immune response against microbial pathogens. In recent times, MPO has received considerable attention as a key oxidative enzyme capable of impairing the bioactivity of nitric oxide (NO) and promoting endothelial dysfunction; a clinically relevant event that manifests throughout the development of inflammatory cardiovascular disease. Increasing evidence indicates that during cardiovascular disease, MPO is released intravascularly by activated leukocytes resulting in its transport and sequestration within the vascular endothelium. At this site, MPO catalyzes various oxidative reactions that are capable of promoting vascular inflammation and impairing NO bioactivity and endothelial function. In particular, MPO catalyzes the production of the potent oxidant hypochlorous acid (HOCl) and the catalytic consumption of NO via the enzyme's NO oxidase activity. An emerging paradigm is the ability of MPO to also influence endothelial function via non-catalytic, cytokine-like activities. In this review article we discuss the implications of our increasing knowledge of the versatility of MPO's actions as a mediator of cardiovascular disease and endothelial dysfunction for the development of new pharmacological agents capable of effectively combating MPO's pathogenic activities. More specifically, we will (i) discuss the various transport mechanisms by which MPO accumulates into the endothelium of inflamed or diseased arteries, (ii) detail the clinical and basic scientific evidence identifying MPO as a significant cause of endothelial dysfunction and cardiovascular disease, (iii) provide an up-to-date coverage on the different oxidative mechanisms by which MPO can impair endothelial function during cardiovascular disease including an evaluation of the contributions of MPO-catalyzed HOCl production and NO oxidation, and (iv) outline the novel non-enzymatic mechanisms of MPO and their potential contribution to endothelial dysfunction. Finally, we deliver a detailed appraisal of the different pharmacological strategies available for targeting the catalytic and non-catalytic modes-of-action of MPO in order to protect against endothelial dysfunction in cardiovascular disease.
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7
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Ramirez DC, Gomez Mejiba SE. Pulmonary Neutrophilic Inflammation and Noncommunicable Diseases: Pathophysiology, Redox Mechanisms, Biomarkers, and Therapeutics. Antioxid Redox Signal 2020; 33:211-227. [PMID: 32319787 DOI: 10.1089/ars.2020.8098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Significance: Pulmonary neurophilic inflammation (PNI) is the homing and activation of neutrophil with damage to the microvasculature. This process is involved in pulmonary damage in patients exposed to airborne pollutants (exogenous stressors) and also to systemic inflammation/oxidative stress (endogenous stressors) associated with noncommunicable diseases (NCDs). Recent Advances: PNI is an important trigger of the early onset and progression of NCD in susceptible patients exposed to airborne pollutants. Irritation of the lung microvasculature by exogenous and endogenous stressors causes PNI. Circulating endogenous stressors in NCD can cause PNI. Critical Issues: Air pollution-triggered PNI causes increased circulating endogenous stressors that can trigger NCD in susceptible patients. Systemic inflammation/oxidative stress associated with NCD can cause PNI. Inflammation/end-oxidation products of macromolecules are also potential biomarkers and therapeutic targets for NCD-triggered PNI- and PNI-triggered NCD. Future Directions: Understanding the molecular mechanism of PNI triggered by exogenous or endogenous stressors will help explain the early onset of NCD in susceptible patients exposed to air pollution. It can also help undercover biomarkers and mechanism-based therapeutic targets in air pollutant-triggered PNI, PNI-triggered NCD, and NCD-triggered PNI.
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Affiliation(s)
- Dario C Ramirez
- Laboratory of Experimental and Translational Medicine, IMIBIO-SL, CCT-San Luis, CONICET, School of Chemistry, Biochemistry and Pharmacy, National University of San Luis, San Luis, Argentina
| | - Sandra E Gomez Mejiba
- Laboratory of Experimental Therapeutics and Nutrition, IMIBIO-SL, CCT-San Luis, CONICET, School of Health Sciences, National University of San Luis, San Luis, Argentina
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8
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Patnaik A, Axford L, Deng L, Cohick E, Ren X, Loi S, Kecman S, Hollis-Symynkywicz M, Harrison TJ, Papillon JPN, Dales N, Hamann LG, Lee L, Regard JB, Marcinkeviciene J, Marro ML, Patterson AW. Discovery of a novel indole pharmacophore for the irreversible inhibition of myeloperoxidase (MPO). Bioorg Med Chem 2020; 28:115548. [PMID: 32503688 DOI: 10.1016/j.bmc.2020.115548] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 05/01/2020] [Accepted: 05/05/2020] [Indexed: 12/23/2022]
Abstract
Myeloperoxidase (MPO) activity and subsequent generation of hypochlorous acid has been associated with the killing of host-invading microorganisms (e.g. bacteria, viruses, and fungi). However, during oxidative stress, high MPO activity can damage host tissue and is linked to several chronic inflammatory conditions. Herein, we describe the development of a novel biaryl, indole-pyrazole series of irreversible mechanism-based inhibitors of MPO. Derived from an indole-containing high-throughput screen hit, optimization efforts resulted in potent and selective 6-substituted indoles with good oral bioavailability and in vivo activity.
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Affiliation(s)
- Anup Patnaik
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States.
| | - Laura Axford
- Cardiovascular and Metabolic Diseases, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Lin Deng
- PK Sciences, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Evan Cohick
- Cardiovascular and Metabolic Diseases, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Xianglin Ren
- Cardiovascular and Metabolic Diseases, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Sally Loi
- Cardiovascular and Metabolic Diseases, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Sam Kecman
- Cardiovascular and Metabolic Diseases, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Micah Hollis-Symynkywicz
- Cardiovascular and Metabolic Diseases, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Tyler J Harrison
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Julien P N Papillon
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Natalie Dales
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Lawrence G Hamann
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Lac Lee
- Cardiovascular and Metabolic Diseases, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Jean B Regard
- Cardiovascular and Metabolic Diseases, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Jovita Marcinkeviciene
- Cardiovascular and Metabolic Diseases, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Martin L Marro
- Cardiovascular and Metabolic Diseases, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States
| | - Andrew W Patterson
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, United States.
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9
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Jayaraj P, Narasimhulu CA, Maiseyeu A, Durairaj R, Rao S, Rajagopalan S, Parthasarathy S, Desikan R. Methoxyphenol derivatives as reversible inhibitors of myeloperoxidase as potential antiatherosclerotic agents. Future Med Chem 2020; 12:95-110. [PMID: 31769316 PMCID: PMC7333589 DOI: 10.4155/fmc-2019-0080] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 10/23/2019] [Indexed: 01/26/2023] Open
Abstract
Aim: To evaluate new chemical entities, based on ferulic acid scaffolds, as reversible myeloperoxidase inhibitors (MPOI). Methodology & results:In silico docking studies are performed with MPO protein as a target for several ferulic acid analogs followed by multiple in vitro assays to validate this approach. Two lead compounds 2a and 3 are identified with optimum docking and IC50 values: -7.95 kcal/mol, 0.9 μM and -8.35 kcal/mol, 8.5 μM, respectively. These MPOIs are able to inhibit oxidation of high-density lipoprotein and further promoted functionality of high-density lipoprotein. Conclusion: Lead analogs are potent MPOIs that exert specific effects on MPO-mediated oxidation as well as inflammatory pathways. It also acts as promoters of cholesterol efflux that sheds light on pharmacological approach in atherosclerosis treatment.
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Affiliation(s)
- Premkumar Jayaraj
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore 632014, India
| | - Chandrakala A Narasimhulu
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Andrei Maiseyeu
- Cardiovascular Research Institute, Case Western Reserve University, School of Medicine, 10900 Euclid Ave, Cleveland, OH 44106, USA
| | - Rekha Durairaj
- Cardiovascular Research Institute, Case Western Reserve University, School of Medicine, 10900 Euclid Ave, Cleveland, OH 44106, USA
| | - Shashidhar Rao
- Department of Chemistry & Chemical Biology, Rutgers University, Piscataway, NJ 08554, USA
| | - Sanjay Rajagopalan
- Cardiovascular Research Institute, Case Western Reserve University, School of Medicine, 10900 Euclid Ave, Cleveland, OH 44106, USA
| | - Sampath Parthasarathy
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Rajagopal Desikan
- Carmel Biosciences, 3562 Habersham at Northlake, Building J, Suite A, Tucker, GA 30084, USA
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore 632014, India
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