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da Rocha MN, da Fonseca AM, Dantas ANM, Dos Santos HS, Marinho ES, Marinho GS. In Silico Study in MPO and Molecular Docking of the Synthetic Drynaran Analogues Against the Chronic Tinnitus: Modulation of the M1 Muscarinic Acetylcholine Receptor. Mol Biotechnol 2024; 66:254-269. [PMID: 37079267 DOI: 10.1007/s12033-023-00748-5] [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: 02/17/2023] [Accepted: 04/03/2023] [Indexed: 04/21/2023]
Abstract
Tinnitus is a syndrome that affects the human auditory system and is characterized by a perception of sounds in the absence of acoustic stimuli, or in total silence. Research indicates that muscarinic acetylcholine receptors (mAChRs), especially the M1 type, have a fundamental role in the alterations of auditory perceptions of tinnitus. Here, a series of computer-aided tools were used, from molecular surface analysis software to services available on the web for estimating pharmacokinetics and pharmacodynamics. The results infer that the low lipophilicity ligands, that is, the 1a-d alkyl furans, present the best pharmacokinetic profile, as compounds with an optimal alignment between permeability and clearance. However, only ligands 1a and 1b have properties that are safe for the central nervous system, the site of cholinergic modulation. These ligands showed similarity with compounds deposited in the European Molecular Biology Laboratory chemical (ChEMBL) database acting on the mAChRs M1 type, the target selected for the molecular docking test. The simulations suggest that the 1 g ligand can form the ligand-receptor complex with the best affinity energy order and that, together with the 1b ligand, they are competitive agonists in relation to the antagonist Tiotropium, in addition to acting in synergism with the drug Bromazepam in the treatment of chronic tinnitus.
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Affiliation(s)
- Matheus Nunes da Rocha
- Graduate Program in Natural Sciences, Center for Science and Technology, State University of Ceará, Fortaleza, CE, Brazil.
| | - Aluísio Marques da Fonseca
- Institute of Engineering and Sustainable Development, Academic Master in Sociobiodiversity and Sustainable Technologies, University of International Integration of Afro-Brazilian Lusofonia, Acarape, CE, Brazil
| | | | | | - Emmanuel Silva Marinho
- Graduate Program in Natural Sciences, Center for Science and Technology, State University of Ceará, Fortaleza, CE, Brazil
- Group of Theoretical Chemistry and Electrochemistry, State University of Ceará, Limoeiro Do Norte, CE, Brazil
| | - Gabrielle Silva Marinho
- Group of Theoretical Chemistry and Electrochemistry, State University of Ceará, Limoeiro Do Norte, CE, Brazil
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Mi HTN, Chaiyasarn S, Kim H, Han J. C-Glycoside-Metabolizing Human Gut Bacterium, Dorea sp. MRG-IFC3. J Microbiol Biotechnol 2023; 33:1606-1614. [PMID: 37789701 PMCID: PMC10772555 DOI: 10.4014/jmb.2308.08021] [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: 08/14/2023] [Revised: 09/01/2023] [Accepted: 09/04/2023] [Indexed: 10/05/2023]
Abstract
Biochemical gut metabolism of dietary bioactive compounds is of great significance in elucidating health-related issues at the molecular level. In this study, a human gut bacterium cleaving C-C glycosidic bond was screened from puerarin conversion to daidzein, and a new, gram-positive C-glycoside-deglycosylating strain, Dorea sp. MRG-IFC3, was isolated from human fecal sample under anaerobic conditions. Though MRG-IFC3 biotransformed isoflavone C-glycoside, it could not metabolize other C-glycosides, such as vitexin, bergenin, and aloin. As evident from the production of the corresponding aglycons from various 7-O-glucosides, MRG-IFC3 strain also showed 7-O-glycoside cleavage activity; however, flavone 3-O-glucoside icariside II was not metabolized. In addition, for mechanism study, C-glycosyl bond cleavage of puerarin by MRG-IFC3 strain was performed in D2O GAM medium. The complete deuterium enrichment on C-8 position of daidzein was confirmed by 1H NMR spectroscopy, and the result clearly proved for the first time that daidzein is produced from puerarin. Two possible reaction intermediates, the quinoids and 8-dehydrodaidzein anion, were proposed for the production of daidzein-8d. These results will provide the basis for the mechanism study of stable C-glycosidic bond cleavage at the molecular level.
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Affiliation(s)
- Huynh Thi Ngoc Mi
- Metalloenzyme Research Group and Department of Plant Science and Technology, Chung-Ang University, Anseong 17546, Republic of Korea
| | - Santipap Chaiyasarn
- Metalloenzyme Research Group and Department of Plant Science and Technology, Chung-Ang University, Anseong 17546, Republic of Korea
| | - Heji Kim
- Metalloenzyme Research Group and Department of Plant Science and Technology, Chung-Ang University, Anseong 17546, Republic of Korea
| | - Jaehong Han
- Metalloenzyme Research Group and Department of Plant Science and Technology, Chung-Ang University, Anseong 17546, Republic of Korea
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Synthesis, structural characterization and study of antioxidant and anti-PrP Sc properties of flavonoids and their rhenium(I)-tricarbonyl complexes. J Biol Inorg Chem 2023; 28:235-247. [PMID: 36695886 PMCID: PMC9981504 DOI: 10.1007/s00775-022-01986-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 12/08/2022] [Indexed: 01/26/2023]
Abstract
This study aims at the synthesis and initial biological evaluation of novel rhenium-tricarbonyl complexes of 3,3',4',5,7-pentahydroxyflavone (quercetin), 3,7,4΄-trihydroxyflavone (resokaempferol), 5,7-dihydroxyflavone (chrysin) and 4΄,5,7-trihydroxyflavonone (naringenin) as neuroprotective and anti-PrP agents. Resokaempferol was synthesized from 2,2΄,4-trihydroxychalcone by H2O2/NaOH. The rhenium-tricarbonyl complexes of the type fac-[Re(CO)3(Fl)(sol)] were synthesized by reacting the precursor fac-[Re(CO)3(sol)3]+ with an equimolar amount of the flavonoids (Fl) quercetin, resokaempferol, chrysin and naringenin and the solvent (sol) was methanol or water. The respective Re-flavonoid complexes were purified by semi-preparative HPLC and characterized by spectroscopic methods. Furthermore, the structure of Re-chrysin was elucidated by X-ray crystallography. Initial screening of the neuroprotective properties of these compounds included the in vitro assessment of the antioxidant properties by the DPPH assay as well as the anti-lipid peroxidation of linoleic acid in the presence of AAPH and their ability to inhibit soybean lipoxygenase. From the above studies, it was concluded that the complexes' properties are mainly correlated with the structural characteristics and the presence of the flavonoids. The flavonoids and their respective Re-complexes were also tested in vitro for their ability to inhibit the formation and aggregation of the amyloid-like abnormal prion protein, PrPSc, by employing the real-time quaking-induced conversion assay with recombinant PrP seeded with cerebrospinal fluid from patients with Creutzfeldt-Jakob disease. All the compounds blocked de novo abnormal PrP formation and aggregation.
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Darbem MP, Esteves HA, Burrow RA, Soares-Paulino AA, Pimenta DC, Stefani HA. Synthesis of unprotected glyco-alkynones via molybdenum-catalyzed carbonylative Sonogashira cross-coupling reaction. RSC Adv 2022; 12:2145-2149. [PMID: 35425248 PMCID: PMC8979075 DOI: 10.1039/d1ra08388k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 12/10/2021] [Indexed: 12/03/2022] Open
Abstract
Herein we report a novel Mo-catalyzed carbonylative Sonogashira cross-coupling between 2-iodoglycals and terminal alkynes. The reaction displays major improvements compared to a related Pd-catalyzed procedure previously published by our group, such as utilizing unprotected sugar derivatives as starting materials and tolerance to substrates bearing chelating groups. In this work we also demonstrate the utility of the glyco-alkynone products as platform for further functionalization by synthesizing glyco-flavones via Au-catalyzed 6-endo-dig cyclization. Thermal ellipsoid representation of compound 3a.![]()
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Affiliation(s)
- Mariana P Darbem
- Departamento de Farmácia, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo Avenida Prof. Lineu Prestes, 580 - Bl. 13 São Paulo 05508-000 Brazil
| | - Henrique A Esteves
- Yusuf Hamied Department of Chemistry, University of Cambridge Cambridge CB2 1EW UK
| | - Robert A Burrow
- Departamento de Química, Universidade Federal de Santa Maria Santa Maria 97105-340 Brazil
| | - Antônio A Soares-Paulino
- Departamento de Farmácia, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo Avenida Prof. Lineu Prestes, 580 - Bl. 13 São Paulo 05508-000 Brazil
| | | | - Hélio A Stefani
- Departamento de Farmácia, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo Avenida Prof. Lineu Prestes, 580 - Bl. 13 São Paulo 05508-000 Brazil
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Dermal Drug Delivery of Phytochemicals with Phenolic Structure via Lipid-Based Nanotechnologies. Pharmaceuticals (Basel) 2021; 14:ph14090837. [PMID: 34577536 PMCID: PMC8471500 DOI: 10.3390/ph14090837] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/17/2021] [Accepted: 08/20/2021] [Indexed: 12/11/2022] Open
Abstract
Phenolic compounds are a large, heterogeneous group of secondary metabolites found in various plants and herbal substances. From the perspective of dermatology, the most important benefits for human health are their pharmacological effects on oxidation processes, inflammation, vascular pathology, immune response, precancerous and oncological lesions or formations, and microbial growth. Because the nature of phenolic compounds is designed to fit the phytochemical needs of plants and not the biopharmaceutical requirements for a specific route of delivery (dermal or other), their utilization in cutaneous formulations sets challenges to drug development. These are encountered often due to insufficient water solubility, high molecular weight and low permeation and/or high reactivity (inherent for the set of representatives) and subsequent chemical/photochemical instability and ionizability. The inclusion of phenolic phytochemicals in lipid-based nanocarriers (such as nanoemulsions, liposomes and solid lipid nanoparticles) is so far recognized as a strategic physico-chemical approach to improve their in situ stability and introduction to the skin barriers, with a view to enhance bioavailability and therapeutic potency. This current review is focused on recent advances and achievements in this area.
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Abstract
![]()
Developing
drugs for the central nervous system (CNS) requires
fine chemical modifications, as a strict balance between size and
lipophilicity is necessary to improve the permeability through the
blood-brain barrier (BBB).
In this context, morpholine and its analogues represent valuable heterocycles,
due to their conformational and physicochemical properties. In fact,
the presence of a weak basic nitrogen atom and of an oxygen atom at
the opposite position provides a peculiar pKa value and a flexible conformation to the ring, thus allowing
it to take part in several lipophilic–hydrophilic interactions,
and to improve blood solubility and brain permeability of the overall
structure. In CNS-active compounds, morpholines are used (1) to enhance
the potency through molecular interactions, (2) to act as a scaffold
directing the appendages in the correct position, and (3) to modulate
pharmacokinetic/pharmacodynamic (PK/PD) properties. In this perspective,
selected morpholine-containing CNS drug candidates are discussed to
reveal the active pharmacophores accountable for the (1) modulation
of receptors involved in mood disorders and pain, (2) bioactivity
toward enzymes and receptors responsible for neurodegenerative diseases,
and (3) inhibition of enzymes involved in the pathology of CNS tumors.
The medicinal chemistry/pharmacological activity of morpholine derivatives
is discussed, in the effort to highlight the importance of morpholine
ring interactions in the active site of different targets, particularly
reporting binding features retrieved from PDB data, when available.
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Affiliation(s)
- Elena Lenci
- Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 13, 50019 Sesto Fiorentino, Florence, Italy
| | - Lorenzo Calugi
- Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 13, 50019 Sesto Fiorentino, Florence, Italy
| | - Andrea Trabocchi
- Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 13, 50019 Sesto Fiorentino, Florence, Italy
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Castelli V, Melani F, Ferri C, d'Angelo M, Catanesi M, Grassi D, Benedetti E, Giordano A, Cimini A, Desideri G. Neuroprotective activities of bacopa, lycopene, astaxanthin, and vitamin B12 combination on oxidative stress-dependent neuronal death. J Cell Biochem 2020; 121:4862-4869. [PMID: 32449987 DOI: 10.1002/jcb.29722] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 03/19/2020] [Accepted: 04/07/2020] [Indexed: 12/28/2022]
Abstract
Oxidative stress is considered the common effector of the cascade of degenerative events in many neurological conditions. Thus, in this paper we tested different nutraceuticals in H2 O2 in vitro model to understand if could represent an adjuvant treatment for neurological diseases. In this study, nutraceuticals bacopa, lycopene, astaxanthin, and vitamin B12 were used alone or in combination in human neuronal differentiated SH-SY5Y cells upon hydrogen peroxide-induced injury and neuroprotective, neuronal death pathways were analyzed. The nutraceuticals analyzed were able to protect H2 O2 cytotoxic effects, through increasing cell viability and proteins involved in neuroprotection pathways and restoring proteins involved in cell death pathways. On this basis, it is possible to propose the use of these compounds as dietary supplement for the prevention or as adjuvant to the only symptomatic treatments so far available for neurodegenerative diseases.
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Affiliation(s)
- Vanessa Castelli
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | | | - Claudio Ferri
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Michele d'Angelo
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Mariano Catanesi
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Davide Grassi
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Elisabetta Benedetti
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Antonio Giordano
- Department of Biology, Sbarro Institute for Cancer Research and Molecular Medicine and Center for Biotechnology, Temple University, Philadelphia, Pennsylvania
- Department of Medical Biotechnology, University of Siena, Siena, Italy
| | - Annamaria Cimini
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
- Department of Biology, Sbarro Institute for Cancer Research and Molecular Medicine and Center for Biotechnology, Temple University, Philadelphia, Pennsylvania
| | - Giovambattista Desideri
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
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