Preliminary Hazard Evaluation of Androgen Receptor-Mediated Endocrine-Disrupting Effects of Thioxanthone Metabolites through Structure-Based Molecular Docking

2014 ◽  
Vol 27 (2) ◽  
pp. 279-289 ◽  
Author(s):  
Tiziana Ginex ◽  
Chiara Dall’Asta ◽  
Pietro Cozzini
Keyword(s):  
Molecular Docking ◽  
Androgen Receptor ◽  
Hazard Evaluation ◽  
Endocrine Disrupting

Structure-Based Virtual Screening of Perfluoroalkyl and Polyfluoroalkyl Substances (PFASs) as Endocrine Disruptors of Androgen Receptor Activity Using Molecular Docking and Machine Learning

2020 ◽  
Author(s):  
Azhagiya Singam Ettayapuram Ramaprasad ◽  
Phum Tachachartvanich ◽  
Denis Fourches ◽  
Anatoly Soshilov ◽  
Jennifer C.Y. Hsieh ◽  
...  
Keyword(s):  
Machine Learning ◽  
Molecular Docking ◽  
Androgen Receptor ◽  
Endocrine Disruptors ◽  
Hormone Receptors ◽  
Steroid Hormone Receptors ◽  
Machine Learning Techniques ◽  
Support Vector ◽  
Polyfluoroalkyl Substances ◽  
Perfluoroalkyl And Polyfluoroalkyl Substances

Perfluoroalkyl and Polyfluoroalkyl Substances (PFASs) pose a substantial threat as endocrine disruptors, and thus early identification of those that may interact with steroid hormone receptors, such as the androgen receptor (AR), is critical. In this study we screened 5,206 PFASs from the CompTox database against the different binding sites on the AR using both molecular docking and machine learning techniques. We developed support vector machine models trained on Tox21 data to classify the active and inactive PFASs for AR using different chemical fingerprints as features. The maximum accuracy was 95.01% and Matthew’s correlation coefficient (MCC) was 0.76 respectively, based on MACCS fingerprints (MACCSFP). The combination of docking-based screening and machine learning models identified 29 PFASs that have strong potential for activity against the AR and should be considered priority chemicals for biological toxicity testing.

scholarly journals SAT-718 Inhibition of Androgen Receptor Activity by DDE Is Affected by Mutations in the BF3 Site

2020 ◽  
Vol 4 (Supplement_1) ◽  
Author(s):  
Andrea Lozano ◽  
Evangelia Kotsikorou ◽  
Frank B Dean
Keyword(s):  
Androgen Receptor ◽  
Ligand Binding ◽  
Binding Domain ◽  
Ligand Binding Domain ◽  
Hek293 Cells ◽  
Luciferase Assay ◽  
Breakdown Product ◽  
Reporter System ◽  
Surface Binding ◽  
Endocrine Disrupting

Abstract The androgen receptor (AR) plays an important role in the development of the male phenotype and traits. Some diphenyl compounds inhibit AR activity by binding to a hydrophobic surface binding site, BF3. A similar diphenyl structure is found in 4,4’ DDT and its breakdown product 4,4’ DDE. Previous results showed that DDT and DDE induced the release of bound dihydrotestosterone from the AR ligand binding domain, with IC50 values ranging from 54 to 82uM. This suggested that DDT and related compounds may act as endocrine disrupting chemicals by binding to the BF3 site and inducing allosteric changes in the AR structure, disrupting binding of the steroid to the ligand binding domain. Here, an AR reporter system was transiently transfected into HEK293 cells and AR activity was measured using a dual luciferase assay. The system was used to measure the response of the AR protein to varying concentrations of dihydrotestosterone in the presence and absence of DDE. DDE inhibited the activation of AR by dihydrotestosterone under these conditions. Five mutant AR genes with amino acid changes in the BF3 site were tested for alterations in the ability of DDE to disrupt AR activity. The five mutations tested were F673K, F673W, G724R, G724M, and L830D. The ability of DDE to inhibit AR activity was reduced by the mutations in the BF3 site. These results suggest that DDE acts as an endocrine disrupting chemical (EDC) by binding to the BF3 site and allosterically regulating AR activity.

scholarly journals In Vitro Characterization of the Endocrine Disrupting Effects of Per- and Poly-fluoroalkyl Substances (PFASs) on the Human Androgen Receptor

2022 ◽  
pp. 128243
Author(s):  
Phum Tachachartvanich ◽  
Azhagiya Singam Ettayapuram Ramaprasad ◽  
Kathleen A. Durkin ◽  
J. David Furlow ◽  
Martyn T. Smith ◽  
...  
Keyword(s):  
Androgen Receptor ◽  
In Vitro Characterization ◽  
Endocrine Disrupting ◽  
Human Androgen Receptor

scholarly journals IDENTIFICATION OF NOVEL 5-STYRYL-1,2,4-OXADIAZOLE/TRIAZOLE DERIVATIVES AS THE POTENTIAL ANTI-ANDROGENS THROUGH MOLECULAR DOCKING STUDY

2016 ◽  
Vol 8 (10) ◽  
pp. 72 ◽  
Author(s):  
Paranjeet Kaur ◽  
Gopal L. Khatik
Keyword(s):  
Molecular Docking ◽  
Androgen Receptor ◽  
Binding Affinity ◽  
Docking Study ◽  
Molecular Structures ◽  
The Novel ◽  
Autodock Vina ◽  
Molecular Docking Study ◽  
Triazole Derivatives ◽  
Better Than

<p class="Default"><strong>Objective: </strong>To identify the novel and simple bioactive antiandrogens, that can overcome to side effects as well as drug resistance.</p><p class="Default"><strong>Methods: </strong>The AutoDock Vina (ADT) 1.5.6 software is used for molecular docking purposes. The molecular structures were drawn in ChemBiodraw ultra and by the help of ChemBiodraw 3D, all structures were energy minimized by MM2 method and converted to pdb extension file which is readable at the ADT interface.</p><p class="Default"><strong>Results: </strong>Total ten compounds from both series were shown better binding affinity than <em>R</em>-bicalutamide including oxadiazole and triazole series. Among these pk42 and pk46 were studied in-depth which showed best binding affinity to the androgen receptor. The <em>cis</em>-isomers were found better than their <em>trans</em>-isomer.</p><p><strong>Conclusion: </strong>Novel 5-styryl-1,2,4-oxadiazole/triazole derivatives were studied through molecular modeling using Autodock Vina. The potent compounds which showed better binding affinity than <em>R</em>-bicalutamide like pk24 and 46 were further analyzed for their interactions. The conformational effect also found significant in binding to the androgen receptor.</p>

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