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Deryusheva EI, Shevelyova MP, Rastrygina VA, Nemashkalova EL, Vologzhannikova AA, Machulin AV, Nazipova AA, Permyakova ME, Permyakov SE, Litus EA. In Search for Low-Molecular-Weight Ligands of Human Serum Albumin That Affect Its Affinity for Monomeric Amyloid β Peptide. Int J Mol Sci 2024; 25:4975. [PMID: 38732194 PMCID: PMC11084196 DOI: 10.3390/ijms25094975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 04/23/2024] [Accepted: 04/30/2024] [Indexed: 05/13/2024] Open
Abstract
An imbalance between production and excretion of amyloid β peptide (Aβ) in the brain tissues of Alzheimer's disease (AD) patients leads to Aβ accumulation and the formation of noxious Aβ oligomers/plaques. A promising approach to AD prevention is the reduction of free Aβ levels by directed enhancement of Aβ binding to its natural depot, human serum albumin (HSA). We previously demonstrated the ability of specific low-molecular-weight ligands (LMWLs) in HSA to improve its affinity for Aβ. Here we develop this approach through a bioinformatic search for the clinically approved AD-related LMWLs in HSA, followed by classification of the candidates according to the predicted location of their binding sites on the HSA surface, ranking of the candidates, and selective experimental validation of their impact on HSA affinity for Aβ. The top 100 candidate LMWLs were classified into five clusters. The specific representatives of the different clusters exhibit dramatically different behavior, with 3- to 13-fold changes in equilibrium dissociation constants for the HSA-Aβ40 interaction: prednisone favors HSA-Aβ interaction, mefenamic acid shows the opposite effect, and levothyroxine exhibits bidirectional effects. Overall, the LMWLs in HSA chosen here provide a basis for drug repurposing for AD prevention, and for the search of medications promoting AD progression.
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Affiliation(s)
- Evgenia I. Deryusheva
- Institute for Biological Instrumentation, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Institutskaya Str., 7, Pushchino 142290, Moscow Region, Russia; (M.P.S.); (V.A.R.); (E.L.N.); (A.A.V.); (A.A.N.); (M.E.P.); (S.E.P.); (E.A.L.)
| | - Marina P. Shevelyova
- Institute for Biological Instrumentation, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Institutskaya Str., 7, Pushchino 142290, Moscow Region, Russia; (M.P.S.); (V.A.R.); (E.L.N.); (A.A.V.); (A.A.N.); (M.E.P.); (S.E.P.); (E.A.L.)
| | - Victoria A. Rastrygina
- Institute for Biological Instrumentation, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Institutskaya Str., 7, Pushchino 142290, Moscow Region, Russia; (M.P.S.); (V.A.R.); (E.L.N.); (A.A.V.); (A.A.N.); (M.E.P.); (S.E.P.); (E.A.L.)
| | - Ekaterina L. Nemashkalova
- Institute for Biological Instrumentation, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Institutskaya Str., 7, Pushchino 142290, Moscow Region, Russia; (M.P.S.); (V.A.R.); (E.L.N.); (A.A.V.); (A.A.N.); (M.E.P.); (S.E.P.); (E.A.L.)
| | - Alisa A. Vologzhannikova
- Institute for Biological Instrumentation, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Institutskaya Str., 7, Pushchino 142290, Moscow Region, Russia; (M.P.S.); (V.A.R.); (E.L.N.); (A.A.V.); (A.A.N.); (M.E.P.); (S.E.P.); (E.A.L.)
| | - Andrey V. Machulin
- Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Pr. Nauki, 5, Pushchino 142290, Moscow Region, Russia;
| | - Alija A. Nazipova
- Institute for Biological Instrumentation, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Institutskaya Str., 7, Pushchino 142290, Moscow Region, Russia; (M.P.S.); (V.A.R.); (E.L.N.); (A.A.V.); (A.A.N.); (M.E.P.); (S.E.P.); (E.A.L.)
| | - Maria E. Permyakova
- Institute for Biological Instrumentation, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Institutskaya Str., 7, Pushchino 142290, Moscow Region, Russia; (M.P.S.); (V.A.R.); (E.L.N.); (A.A.V.); (A.A.N.); (M.E.P.); (S.E.P.); (E.A.L.)
| | - Sergei E. Permyakov
- Institute for Biological Instrumentation, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Institutskaya Str., 7, Pushchino 142290, Moscow Region, Russia; (M.P.S.); (V.A.R.); (E.L.N.); (A.A.V.); (A.A.N.); (M.E.P.); (S.E.P.); (E.A.L.)
| | - Ekaterina A. Litus
- Institute for Biological Instrumentation, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Institutskaya Str., 7, Pushchino 142290, Moscow Region, Russia; (M.P.S.); (V.A.R.); (E.L.N.); (A.A.V.); (A.A.N.); (M.E.P.); (S.E.P.); (E.A.L.)
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Bumma N, Kahwash R, Parikh SV, Isfort M, Freimer M, Vallakati A, Redder E, Campbell CM, Sharma N, Efebera Y, Stino A. Multidisciplinary amyloidosis care in the era of personalized medicine. Front Neurol 2022; 13:935936. [PMID: 36341129 PMCID: PMC9630033 DOI: 10.3389/fneur.2022.935936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 09/22/2022] [Indexed: 11/28/2022] Open
Abstract
Amyloidosis refers to a group of conditions where abnormal protein-or amyloid-deposits in tissues or organs, often leading to organ malfunction. Amyloidosis affects nearly any organ system, but especially the heart, kidneys, liver, peripheral nervous system, and gastrointestinal tract. Neuromuscular deficits comprise some of its ubiquitous manifestations. Amyloidosis can be quite challenging to diagnose given its clinical heterogeneity and multi-system nature. Early diagnosis with accurate genetic and serologic subtyping is key for effective management and prevention of organ decline. In this review, we highlight the value of a multidisciplinary comprehensive amyloidosis clinic. While such a model exists at numerous clinical and research centers across the globe, the lack of more widespread adoption of such a model remains a major hindrance to the timely diagnosis of amyloidosis. Such a multidisciplinary care model allows for the timely and effective diagnosis of amyloidosis, be it acquired amyloid light amyloidosis (AL), hereditary transthyretin amyloidosis (hATTR), or wild type amyloidosis (TTR-wt), especially in the current era of personalized genomic medicine. A multidisciplinary clinic optimizes the delivery of singular or combinatorial drug therapies, depending on amyloid type, fibril deposition location, and disease progression. Such an arrangement also helps advance research in the field. We present our experience at The Ohio State University, as one example out of many, to highlight the centrality of a multi-disciplinary clinic in amyloidosis care.
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Affiliation(s)
- Naresh Bumma
- Division of Hematology-Oncology, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Rami Kahwash
- Division of Cardiology, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Samir V. Parikh
- Division of Nephrology, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Michael Isfort
- Division of Neuromuscular Medicine, Department of Neurology, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Miriam Freimer
- Division of Neuromuscular Medicine, Department of Neurology, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Ajay Vallakati
- Division of Cardiology, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Elyse Redder
- Oncology Rehabilitation, The Ohio State University James Cancer Center, Columbus, OH, United States
| | - Courtney M. Campbell
- Division of Cardiology, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
- Cardiovascular Division, Cardio-Oncology Center of Excellence, Washington University in St. Louis, St. Louis, MO, United States
| | - Nidhi Sharma
- Division of Hematology-Oncology, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Yvonne Efebera
- Ohio Health, Department of Hematology/Oncology and Blood and Marrow Transplant, Columbus, OH, United States
| | - Amro Stino
- Division of Neuromuscular Medicine, Department of Neurology, The University of Michigan Medical School, Ann Arbor, MI, United States
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Fongaro B, Cappelletto E, Sosic A, Spolaore B, Polverino de Laureto P. 3,4-Dihydroxyphenylethanol and 3,4-dihydroxyphenylacetic acid affect the aggregation process of E46K variant of α-synuclein at different extent: Insights into the interplay between protein dynamics and catechol effect. Protein Sci 2022; 31:e4356. [PMID: 35762714 PMCID: PMC9202543 DOI: 10.1002/pro.4356] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 05/09/2022] [Accepted: 05/11/2022] [Indexed: 11/11/2022]
Abstract
Parkinson's disease (PD) is a chronic multifactorial disease, whose etiology is not completely understood. The amyloid aggregation of α‐synuclein (Syn) is considered a major cause in the development of the disease. The presence of genetic mutations can boost the aggregation of the protein and the likelihood to develop PD. These mutations can lead to early onset (A30P, E46K, and A53T) or late‐onset (H50Q) forms of PD. The disease is also linked to an increase in oxidative stress and altered levels of dopamine metabolites. The molecular interaction of these molecules with Syn has been previously studied, while their effect on the pathological mutant structure and function is not completely clarified. By using biochemical and biophysical approaches, here we have studied the interaction of the familial variant E46K with two dopamine‐derived catechols, 3,4‐dihydroxyphenylacetic acid and 3,4‐dihydroxyphenylethanol. We show that the presence of these catechols causes a decrease in the formation of amyloid fibrils in a dose‐dependent manner. Native‐ and Hydrogen/deuterium exchange‐mass spectrometry (HDX‐MS) provide evidence that this effect is strongly conformation dependent. Indeed, these molecules interact differently with the interconverting conformers of Syn and its familial variant E46K in solution, selecting the most prone‐to‐aggregation one, confining it into an off‐pathway oligomer. These findings suggest that catechols could be a molecular scaffold for the design of compounds potentially useful in the treatment of Parkinson's disease and related conditions.
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Affiliation(s)
- Benedetta Fongaro
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Elia Cappelletto
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Alice Sosic
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Barbara Spolaore
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
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The Transthyretin/Oleuropein Aglycone Complex: A New Tool against TTR Amyloidosis. Pharmaceuticals (Basel) 2022; 15:ph15030277. [PMID: 35337074 PMCID: PMC8953266 DOI: 10.3390/ph15030277] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/17/2022] [Accepted: 02/21/2022] [Indexed: 02/01/2023] Open
Abstract
The release of monomers from the homotetrameric protein transthyretin (TTR) is the first event of a cascade, eventually leading to sporadic or familial TTR amyloidoses. Thus, ligands able to stabilize TTR and inhibit monomer release are subject of intense scrutiny as potential treatments against these pathologies. Here, we investigated the interaction between TTR and a non-glycated derivative of the main olive polyphenol, oleuropein (OleA), known to interfere with TTR aggregation. We coupled fluorescence studies with molecular docking to investigate the OleA/TTR interaction using wild-type TTR, a monomeric variant, and the L55P cardiotoxic mutant. We characterized a fluorescence band emitted by OleA upon formation of the OleA/TTR complex. Exploiting this signal, we found that a poorly specific non-stoichiometric interaction occurs on the surface of the protein and a more specific stabilizing interaction takes place in the ligand binding pocket of TTR, exhibiting a KD of 3.23 ± 0.32 µM, with two distinct binding sites. OleA interacts with TTR in different modes, stabilizing it and preventing its dissociation into monomers, with subsequent misfolding. This result paves the way to the possible use of OleA to prevent degenerative diseases associated with TTR misfolding.
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Hadrich F, Chamkha M, Sayadi S. Protective effect of olive leaves phenolic compounds against neurodegenerative disorders: Promising alternative for Alzheimer and Parkinson diseases modulation. Food Chem Toxicol 2021; 159:112752. [PMID: 34871668 DOI: 10.1016/j.fct.2021.112752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 11/24/2021] [Accepted: 12/01/2021] [Indexed: 02/07/2023]
Abstract
The main objective of this work was to review literature on compounds extracted from olive tree leaves, such as simple phenols (hydroxytyrosol) and flavonoids (Apigenin, apigenin-7-O-glucoside, luteolin.) and their diverse pharmacological activities as antioxidant, antimicrobial, anti-viral, anti-obesity, anti-inflammatory and neuroprotective properties. In addition, the study discussed the key mechanisms underlying their neuroprotective effects. This study adopted an approach of collecting data through the databases provided by ScienceDirect, SCOPUS, MEDLINE, PubMed and Google Scholar. This review revealed that there was an agreement on the great impact of olive tree leaves phenolic compounds on many metabolic syndromes as well as on the most prevalent neurodegenerative diseases such as Alzheimer and Parkinson. These findings would be of great importance for the use of olive tree leaves extracts as a food supplement and/or a source of drugs for many diseases. In addition, this review would of great help to beginning researchers in the field since it would offer them a general overview of the studies undertaken in the last two decades on the topic.
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Affiliation(s)
- Fatma Hadrich
- Environmental Bioprocesses Laboratory, Center of Biotechnology of Sfax, P.O. Box 1177, 3038, Sfax, Tunisia.
| | - Mohamed Chamkha
- Environmental Bioprocesses Laboratory, Center of Biotechnology of Sfax, P.O. Box 1177, 3038, Sfax, Tunisia
| | - Sami Sayadi
- Biotechnology Program, Center of Sustainable Development, College of Arts and Sciences, Qatar University, Doha, 2713, Qatar.
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Leri M, Chaudhary H, Iashchishyn IA, Pansieri J, Svedružić ŽM, Gómez Alcalde S, Musteikyte G, Smirnovas V, Stefani M, Bucciantini M, Morozova-Roche LA. Natural Compound from Olive Oil Inhibits S100A9 Amyloid Formation and Cytotoxicity: Implications for Preventing Alzheimer's Disease. ACS Chem Neurosci 2021; 12:1905-1918. [PMID: 33979140 PMCID: PMC8291483 DOI: 10.1021/acschemneuro.0c00828] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
![]()
Polyphenolic compounds
in the Mediterranean diet have received
increasing attention due to their protective properties in amyloid
neurodegenerative and many other diseases. Here, we have demonstrated
for the first time that polyphenol oleuropein aglycone (OleA), which
is the most abundant compound in olive oil, has multiple potencies
for the inhibition of amyloid self-assembly of pro-inflammatory protein
S100A9 and the mitigation of the damaging effect of its amyloids on
neuroblastoma SH-SY5Y cells. OleA directly interacts with both native
and fibrillar S100A9 as shown by intrinsic fluorescence and molecular
dynamic simulation. OleA prevents S100A9 amyloid oligomerization as
shown using amyloid oligomer-specific antibodies and cross-β-sheet
formation detected by circular dichroism. It decreases the length
of amyloid fibrils measured by atomic force microscopy (AFM) as well
as reduces the effective rate of amyloid growth and the overall amyloid
load as derived from the kinetic analysis of amyloid formation. OleA
disintegrates already preformed fibrils of S100A9, converting them
into nonfibrillar and nontoxic aggregates as revealed by amyloid thioflavin-T
dye binding, AFM, and cytotoxicity assays. At the cellular level,
OleA targets S100A9 amyloids already at the membranes as shown by
immunofluorescence and fluorescence resonance energy transfer, significantly
reducing the amyloid accumulation in GM1 ganglioside containing membrane
rafts. OleA increases overall cell viability when neuroblastoma cells
are subjected to the amyloid load and alleviates amyloid-induced intracellular
rise of reactive oxidative species and free Ca2+. Since
S100A9 is both a pro-inflammatory and amyloidogenic protein, OleA
may effectively mitigate the pathological consequences of the S100A9-dependent
amyloid-neuroinflammatory cascade as well as provide protection from
neurodegeneration, if used within the Mediterranean diet as a potential
preventive measure.
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Affiliation(s)
- Manuela Leri
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, 50134 Florence, Italy
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, 50139 Florence, Italy
| | - Himanshu Chaudhary
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187 Umeå, Sweden
| | - Igor A. Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187 Umeå, Sweden
| | - Jonathan Pansieri
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187 Umeå, Sweden
| | | | - Silvia Gómez Alcalde
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187 Umeå, Sweden
| | - Greta Musteikyte
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Vytautas Smirnovas
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Massimo Stefani
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, 50134 Florence, Italy
| | - Monica Bucciantini
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, 50134 Florence, Italy
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Pagano K, Tomaselli S, Molinari H, Ragona L. Natural Compounds as Inhibitors of Aβ Peptide Aggregation: Chemical Requirements and Molecular Mechanisms. Front Neurosci 2020; 14:619667. [PMID: 33414705 PMCID: PMC7783407 DOI: 10.3389/fnins.2020.619667] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 12/04/2020] [Indexed: 12/29/2022] Open
Abstract
Alzheimer’s disease (AD) is one of the most common neurodegenerative disorders, with no cure and preventive therapy. Misfolding and extracellular aggregation of Amyloid-β (Aβ) peptides are recognized as the main cause of AD progression, leading to the formation of toxic Aβ oligomers and to the deposition of β-amyloid plaques in the brain, representing the hallmarks of AD. Given the urgent need to provide alternative therapies, natural products serve as vital resources for novel drugs. In recent years, several natural compounds with different chemical structures, such as polyphenols, alkaloids, terpenes, flavonoids, tannins, saponins and vitamins from plants have received attention for their role against the neurodegenerative pathological processes. However, only for a small subset of them experimental evidences are provided on their mechanism of action. This review focuses on those natural compounds shown to interfere with Aβ aggregation by direct interaction with Aβ peptide and whose inhibitory mechanism has been investigated by means of biophysical and structural biology experimental approaches. In few cases, the combination of approaches offering a macroscopic characterization of the oligomers, such as TEM, AFM, fluorescence, together with high-resolution methods could shed light on the complex mechanism of inhibition. In particular, solution NMR spectroscopy, through peptide-based and ligand-based observation, was successfully employed to investigate the interactions of the natural compounds with both soluble NMR-visible (monomer and low molecular weight oligomers) and NMR-invisible (high molecular weight oligomers and protofibrils) species. The molecular determinants of the interaction of promising natural compounds are here compared to infer the chemical requirements of the inhibitors and the common mechanisms of inhibition. Most of the data converge to indicate that the Aβ regions relevant to perturb the aggregation cascade and regulate the toxicity of the stabilized oligomers, are the N-term and β1 region. The ability of the natural aggregation inhibitors to cross the brain blood barrier, together with the tactics to improve their low bioavailability are discussed. The analysis of the data ensemble can provide a rationale for the selection of natural compounds as molecular scaffolds for the design of new therapeutic strategies against the progression of early and late stages of AD.
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Affiliation(s)
- Katiuscia Pagano
- NMR Laboratory, Istituto di Scienze e Tecnologie Chimiche (SCITEC), Consiglio Nazionale delle Ricerche - CNR, Milan, Italy
| | - Simona Tomaselli
- NMR Laboratory, Istituto di Scienze e Tecnologie Chimiche (SCITEC), Consiglio Nazionale delle Ricerche - CNR, Milan, Italy
| | - Henriette Molinari
- NMR Laboratory, Istituto di Scienze e Tecnologie Chimiche (SCITEC), Consiglio Nazionale delle Ricerche - CNR, Milan, Italy
| | - Laura Ragona
- NMR Laboratory, Istituto di Scienze e Tecnologie Chimiche (SCITEC), Consiglio Nazionale delle Ricerche - CNR, Milan, Italy
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Allium roseum L. extract inhibits amyloid beta aggregation and toxicity involved in Alzheimer's disease. PLoS One 2020; 15:e0223815. [PMID: 32997672 PMCID: PMC7526880 DOI: 10.1371/journal.pone.0223815] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 07/13/2020] [Indexed: 11/19/2022] Open
Abstract
Allium roseum is an important medicinal and aromatic plant, specific to the North African flora and a rich source of important nutrients and bioactive molecules including flavonoids and organosulfur compounds whose biological activities and pharmacological properties are well known. In the present study, the inhibition of amyloid beta protein toxicity by the ethanolic extract of this plant is investigated for the first time. Preliminary biochemical analyses identified kæmpferol and luteolin-7-o-glucoside as the more abundant phenolic compounds. The effects of A. roseum extract (ARE) on aggregation and aggregate cytotoxicity of amyloid beta-42 (Aβ42), whose brain aggregates are a hallmark of Alzheimer's disease, were investigated by biophysical (ThT assay, Dynamic light scattering and transmission electron microscopy) and cellular assays (cytotoxicity, aggregate immunolocalization, ROS measurement and intracellular Ca2+ imaging). The biophysical data suggest that ARE affects the structure of the Aβ42 peptide, inhibits its polymerization, and interferes with the path of fibrillogenesis. The data with cultured cells shows that ARE reduces Aß42 aggregate toxicity by inhibiting aggregate binding to the cell membrane and by decreasing both oxidative stress and intracellular Ca2+. Accordingly, ARE could act as a neuroprotective factor against Aβ aggregate toxicity in Alzheimer's disease.
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Mazzei R, Piacentini E, Nardi M, Poerio T, Bazzarelli F, Procopio A, Di Gioia ML, Rizza P, Ceraldi R, Morelli C, Giorno L, Pellegrino M. Production of Plant-Derived Oleuropein Aglycone by a Combined Membrane Process and Evaluation of Its Breast Anticancer Properties. Front Bioeng Biotechnol 2020; 8:908. [PMID: 33117773 PMCID: PMC7551858 DOI: 10.3389/fbioe.2020.00908] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 07/14/2020] [Indexed: 12/16/2022] Open
Abstract
Natural products and herbal therapies represent a thriving field of research, but methods for the production of plant-derived compounds with a significative biological activity by synthetic methods are required. Conventional commercial production by chemical synthesis or solvent extraction is not yet sustainable and economical because toxic solvents are used, the process involves many steps, and there is generally a low amount of the product produced, which is often mixed with other or similar by-products. For this reason, alternative, sustainable, greener, and more efficient processes are required. Membrane processes are recognized worldwide as green technologies since they promote waste minimization, material diversity, efficient separation, energy saving, process intensification, and integration. This article describes the production, characterization, and utilization of bioactive compounds derived from renewable waste material (olive leaves) as drug candidates in breast cancer (BC) treatment. In particular, an integrated membrane process [composed by a membrane bioreactor (MBR) and a membrane emulsification (ME) system] was developed to produce a purified non-commercially available phytotherapic compound: the oleuropein aglycone (OLA). This method achieves a 93% conversion of the substrate (oleuropein) and enables the extraction of the compound of interest with 90% efficiency in sustainable conditions. The bioderived compound exercised pro-apoptotic and antiproliferative activities against MDA-MB-231 and Tamoxifen-resistant MCF-7 (MCF-7/TR) cells, suggesting it as a potential agent for the treatment of breast cancer including hormonal resistance therapies.
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Affiliation(s)
- Rosalinda Mazzei
- Institute on Membrane Technology, National Research Council, ITM-CNR, Rende, Italy
| | - Emma Piacentini
- Institute on Membrane Technology, National Research Council, ITM-CNR, Rende, Italy
| | - Monica Nardi
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Teresa Poerio
- Institute on Membrane Technology, National Research Council, ITM-CNR, Rende, Italy
| | - Fabio Bazzarelli
- Institute on Membrane Technology, National Research Council, ITM-CNR, Rende, Italy
| | - Antonio Procopio
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Maria Luisa Di Gioia
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Pietro Rizza
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Rosangela Ceraldi
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Catia Morelli
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Lidietta Giorno
- Institute on Membrane Technology, National Research Council, ITM-CNR, Rende, Italy
| | - Michele Pellegrino
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
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Vasarri M, Ramazzotti M, Tiribilli B, Barletta E, Pretti C, Mulinacci N, Degl’Innocenti D. The In Vitro Anti-amyloidogenic Activity of the Mediterranean Red Seaweed Halopithys Incurva. Pharmaceuticals (Basel) 2020; 13:ph13080185. [PMID: 32784616 PMCID: PMC7465926 DOI: 10.3390/ph13080185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 07/30/2020] [Accepted: 08/05/2020] [Indexed: 12/17/2022] Open
Abstract
Neurodegenerative diseases are generally characterized by the presence of neurotoxic amyloid aggregates underlying progressive neuronal death. Since ancient times, natural compounds have been used as curative agents for human health. Amyloid research is constantly looking for safe natural molecules capable of blocking toxic amyloid aggregates’ formation. From the marine environment, seaweeds are recognized as rich reservoirs of molecules with multiple bioactivities, including the anti-amyloidogenic activity. Here, hydroalcoholic extracts of two seasonal samples of the Mediterranean red seaweed Halophytis incurva (HIEs) were characterized by the HPLC-DAD-MS analysis. The H. incurva anti-amyloidogenic role was explored by incubating both HIEs with hen egg white lysozyme (HEWL), a well-known protein model widely used in amyloid aggregation experiments. The aggregation kinetics and morphological analysis of amyloid aggregates were performed by ThT and AFM analysis, respectively, while their cytotoxicity on SH-SY5Y human neuroblastoma cells was examined by MTT assay. HIEs showed a different efficacy, probably dependent on their metabolic composition, both in inhibiting amyloid fibrillation and in obtaining short and less toxic pre-fibrillary aggregates. Overall, this work sheds light, for the first time, on a Mediterranean red seaweed as a promising renewable resource of bioactive compounds, potentially useful in preventing the formation of toxic amyloid aggregates.
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Affiliation(s)
- Marzia Vasarri
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, 50134 Florence, Italy; (M.V.); (M.R.); (E.B.)
| | - Matteo Ramazzotti
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, 50134 Florence, Italy; (M.V.); (M.R.); (E.B.)
| | - Bruno Tiribilli
- Institute for Complex Systems-National Research Council (ISC-CNR), Via Madonna del piano 10, 50019 Sesto Fiorentino, Florence, Italy;
| | - Emanuela Barletta
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, 50134 Florence, Italy; (M.V.); (M.R.); (E.B.)
| | - Carlo Pretti
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 56124 Pisa, Italy;
- Interuniversity Center of Marine Biology and Applied Ecology “G. Bacci” (CIBM), Viale N. Sauro 4, 57128 Livorno, Italy
| | - Nadia Mulinacci
- Department of NEUROFARBA, Nutraceutical section, University of Florence, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy;
| | - Donatella Degl’Innocenti
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, 50134 Florence, Italy; (M.V.); (M.R.); (E.B.)
- Interuniversity Center of Marine Biology and Applied Ecology “G. Bacci” (CIBM), Viale N. Sauro 4, 57128 Livorno, Italy
- Correspondence:
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Bucciantini M, Leri M, Stefani M, Melki R, Zecchi-Orlandini S, Nosi D. The Amphipathic GM1 Molecule Stabilizes Amyloid Aggregates, Preventing their Cytotoxicity. Biophys J 2020; 119:326-336. [PMID: 32579964 DOI: 10.1016/j.bpj.2020.06.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 05/20/2020] [Accepted: 06/02/2020] [Indexed: 12/20/2022] Open
Abstract
Amyloid aggregates have been demonstrated to exert cytotoxic effects in several diseases. It is widely accepted that the complex and fascinating aggregation pathway involves a series of steps during which many heterogeneous intermediates are generated. This process may be greatly potentiated by the presence of amphipathic components of plasma membrane because they may serve as interaction, condensation, and nucleation points. However, there are few data regarding structural alterations induced by the binding between the amyloid fibrils and membrane components and its direct effects on cell integrity. In this study, we found, by 1-anilinonaphthalene 8-sulfonic acid and transmission electron microscopy/fast Fourier transform, that yeast prion Sup35 oligomers showed higher structural uniformity and altered surface properties when grown in the presence of monosialotetrahexosylganglioside, a component of the cell membrane. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and confocal/sensitized Förster resonance energy transfer analyses revealed that these fibrils showed low cytotoxicity and affinity to plasma membrane. Moreover, time-lapse analysis of Sup35 oligomer fibrillation on cells suggested that the amyloid aggregation process per se exerts cytotoxic effects through the interaction of amyloid intermediates with plasma membrane components. These data provide, to our knowledge, new insights to understand the mechanism of amyloid growth and cytotoxicity in the pathogenesis of amyloid diseases.
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Affiliation(s)
- Monica Bucciantini
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio," University of Florence, Florence, Italy.
| | - Manuela Leri
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio," University of Florence, Florence, Italy; Department of Neuroscience, Psychology, Area of Medicine and Health of the Child of the University of Florence, Florence, Italy
| | - Massimo Stefani
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio," University of Florence, Florence, Italy
| | - Ronald Melki
- Institut Francois Jacob, CEA and Laboratory of Neurodegenerative Diseases, CNRS 92265, Fontenay-Aux-Roses, France
| | | | - Daniele Nosi
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
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12
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Potential Protective Role Exerted by Secoiridoids from Olea europaea L. in Cancer, Cardiovascular, Neurodegenerative, Aging-Related, and Immunoinflammatory Diseases. Antioxidants (Basel) 2020; 9:antiox9020149. [PMID: 32050687 PMCID: PMC7070598 DOI: 10.3390/antiox9020149] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 12/12/2022] Open
Abstract
Iridoids, which have beneficial health properties, include a wide group of cyclopentane [c] pyran monoterpenoids present in plants and insects. The cleavage of the cyclopentane ring leads to secoiridoids. Mainly, secoiridoids have shown a variety of pharmacological effects including anti-diabetic, antioxidant, anti-inflammatory, immunosuppressive, neuroprotective, anti-cancer, and anti-obesity, which increase the interest of studying these types of bioactive compounds in depth. Secoiridoids are thoroughly distributed in several families of plants such as Oleaceae, Valerianaceae, Gentianaceae and Pedialaceae, among others. Specifically, Olea europaea L. (Oleaceae) is rich in oleuropein (OL), dimethyl-OL, and ligstroside secoiridoids, and their hydrolysis derivatives are mostly OL-aglycone, oleocanthal (OLE), oleacein (OLA), elenolate, oleoside-11-methyl ester, elenoic acid, hydroxytyrosol (HTy), and tyrosol (Ty). These compounds have proved their efficacy in the management of diabetes, cardiovascular and neurodegenerative disorders, cancer, and viral and microbial infections. Particularly, the antioxidant, anti-inflammatory, and immunomodulatory properties of secoiridoids from the olive tree (Olea europaea L. (Oleaceae)) have been suggested as a potential application in a large number of inflammatory and reactive oxygen species (ROS)-mediated diseases. Thus, the purpose of this review is to summarize recent advances in the protective role of secoiridoids derived from the olive tree (preclinical studies and clinical trials) in diseases with an important pathogenic contribution of oxidative and peroxidative stress and damage, focusing on their plausible mechanisms of the action involved.
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Nediani C, Ruzzolini J, Romani A, Calorini L. Oleuropein, a Bioactive Compound from Olea europaea L., as a Potential Preventive and Therapeutic Agent in Non-Communicable Diseases. Antioxidants (Basel) 2019; 8:E578. [PMID: 31766676 PMCID: PMC6943788 DOI: 10.3390/antiox8120578] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 11/16/2019] [Accepted: 11/19/2019] [Indexed: 12/11/2022] Open
Abstract
Growing scientific literature data suggest that the intake of natural bioactive compounds plays a critical role in preventing or reducing the occurrence of human chronic non-communicable diseases (NCDs). Oleuropein, the main phenolic component of Olea europaea L., has attracted scientific attention for its several health beneficial properties such as antioxidant, anti-inflammatory, cardio- and neuro-protective, and anti-cancer. This article is a narrative review focused on the current literature concerning the effect of oleuropein in NCDs, such as neuro- and cardiovascular diseases, diabetes mellitus, chronic kidney diseases, and cancer, by its putative antioxidant and anti-inflammatory activity, but also for its other peculiar actions such as an autophagy inducer and amyloid fibril growth inhibitor and, finally, for its anti-cancer effect. Despite the increasing number of published studies, looking at the beneficial effects of oleuropein, there is limited clinical evidence focused on the benefits of this polyphenol as a nutraceutical product in humans, and many problems are still to be resolved about its bioavailability, bioaccessibility, and dosage. Thus, future clinical randomized trials are needed to establish the relation between the beneficial effects and the mechanisms of action occurring in the human body in response to the intake of oleuropein.
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Affiliation(s)
- Chiara Nediani
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, viale Morgagni 50, 50134 Florence, Italy; (J.R.); (L.C.)
| | - Jessica Ruzzolini
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, viale Morgagni 50, 50134 Florence, Italy; (J.R.); (L.C.)
| | - Annalisa Romani
- PHYTOLAB (Pharmaceutical, Cosmetic, Food Supplement, Technology and Analysis)-DiSIA, University of Florence, Via U. Schiff, 6, 50019 Sesto Fiorentino, Florence, Italy;
| | - Lido Calorini
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, viale Morgagni 50, 50134 Florence, Italy; (J.R.); (L.C.)
- Istituto Toscano Tumori and Center of Excellence for Research, Transfer and High Education (DENOTHE), University of Florence, Piazza di San Marco 4, 50121 Florence, Italy
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Palazzi L, Leri M, Cesaro S, Stefani M, Bucciantini M, Polverino de Laureto P. Insight into the molecular mechanism underlying the inhibition of α-synuclein aggregation by hydroxytyrosol. Biochem Pharmacol 2019; 173:113722. [PMID: 31756328 DOI: 10.1016/j.bcp.2019.113722] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 11/15/2019] [Indexed: 01/07/2023]
Abstract
Parkinson's disease (PD) is the second most prevalent neurodegenerative disease in the elderly people. To date, drugs able to reverse the disease are not available; the gold standard is levodopa that only relieves clinical symptoms, yet with severe side effects after prolonged administration. Many efforts are underway to find alternative targets for PD prevention or treatment, the most promising being α-synuclein (Syn). Recently, we reported that oleuropein aglycone (OleA) interferes with amyloid aggregation of Syn both stabilizing its monomeric state and inducing the formation of harmless, off-pathway oligomers. This study is focused at describing the interaction between Syn and hydroxytyrosol (HT), the phenolic moiety and main metabolite of OleA, and the interferences with Syn aggregation by using biophysical and biological techniques. Our results show that HT dose-dependently inhibits Syn aggregation and that covalent and non-covalent binding mediate HT-Syn interaction. HT does not modify the natively unfolded structure of Syn, rather, it stabilizes specific regions of the molecule leading to inhibition of protein fibrillation. Cellular assays showed that HT reduces the toxicity of Syn aggregates. Moreover, Syn aggregates interaction with the cell membrane, an important factor for prion-like properties of Syn on-pathway oligomers, was reduced in cells exposed to Syn aggregates grown in the presence of HT.
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Affiliation(s)
- Luana Palazzi
- Department of Pharmaceutical Sciences, CRIBI Biotechnology Centre, University of Padova, Italy
| | - Manuela Leri
- Department of Biomedical, Experimental and Clinical Sciences, University of Firenze, Italy; Department of Neuroscience, Psychology, Drug Research and Child Health, University of Firenze, Italy
| | - Samuele Cesaro
- Department of Pharmaceutical Sciences, CRIBI Biotechnology Centre, University of Padova, Italy
| | - Massimo Stefani
- Department of Biomedical, Experimental and Clinical Sciences, University of Firenze, Italy
| | - Monica Bucciantini
- Department of Biomedical, Experimental and Clinical Sciences, University of Firenze, Italy
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15
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Piacentini E, Mazzei R, Bazzarelli F, Ranieri G, Poerio T, Giorno L. Oleuropein Aglycone Production and Formulation by Integrated Membrane Process. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03210] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E. Piacentini
- Institute on Membrane Technology, National Research Council, ITM-CNR, via P. Bucci, 17/C, I-87036 Rende (Cosenza), Italy
| | - R. Mazzei
- Institute on Membrane Technology, National Research Council, ITM-CNR, via P. Bucci, 17/C, I-87036 Rende (Cosenza), Italy
| | - F. Bazzarelli
- Institute on Membrane Technology, National Research Council, ITM-CNR, via P. Bucci, 17/C, I-87036 Rende (Cosenza), Italy
| | - G. Ranieri
- Institute on Membrane Technology, National Research Council, ITM-CNR, via P. Bucci, 17/C, I-87036 Rende (Cosenza), Italy
| | - T. Poerio
- Institute on Membrane Technology, National Research Council, ITM-CNR, via P. Bucci, 17/C, I-87036 Rende (Cosenza), Italy
| | - L. Giorno
- Institute on Membrane Technology, National Research Council, ITM-CNR, via P. Bucci, 17/C, I-87036 Rende (Cosenza), Italy
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Leri M, Natalello A, Bruzzone E, Stefani M, Bucciantini M. Oleuropein aglycone and hydroxytyrosol interfere differently with toxic Aβ 1-42 aggregation. Food Chem Toxicol 2019; 129:1-12. [PMID: 30995514 DOI: 10.1016/j.fct.2019.04.015] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 04/08/2019] [Accepted: 04/10/2019] [Indexed: 12/18/2022]
Abstract
Oleuropein aglycone (OleA), the most abundant polyphenol in extra virgin olive oil (EVOO), and Hydroxythyrosol (HT), the OleA main metabolite, have attracted our interest due to their multitarget effects, including the interference with amyloid aggregation path. However, the mechanistic details of their anti-amyloid effect are not known yet. We report here a broad biophysical approach and cell biology techniques that enabled us to characterize the different molecular mechanisms by which OleA and HT modulate the Aβ1-42 fibrillation, a main histopathological feature of Alzheimer's disease (AD). In particular, OleA prevents the growth of toxic Aβ1-42 oligomers and blocks their successive growth into mature fibrils following its interaction with the peptide N-terminus, while HT speeds up harmless fibril formation. Our data demonstrate that, by stabilizing oligomers and fibrils, both polyphenols reduce their seeding activity and aggregate/membrane interaction on human neuroblastoma SH-SY5Y cells. These findings highlight the great potential of EVOO polyphenols and offer the possibility to validate and to optimize their use for possible AD prevention and therapy.
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Affiliation(s)
- Manuela Leri
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Viale Morgagni 50 - 50134, Florence, Italy; Department of Neuroscience, Psychology, Area of Medicine and Health of the Child of the University of Florence, Viale Pieraccini, 6 - 50139 Florence, Italy.
| | - Antonino Natalello
- Department of Biotechnology and Biosciences, University of Milano Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Elena Bruzzone
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Viale Morgagni 50 - 50134, Florence, Italy.
| | - Massimo Stefani
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Viale Morgagni 50 - 50134, Florence, Italy; Interuniversity Center for the Study of Neurodegenerative Diseases (CIMN), Florence, Italy.
| | - Monica Bucciantini
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Viale Morgagni 50 - 50134, Florence, Italy; Interuniversity Center for the Study of Neurodegenerative Diseases (CIMN), Florence, Italy.
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Vus K, Girych M, Trusova V, Gorbenko G, Kurutos A, Vasilev A, Gadjev N, Deligeorgiev T. Cyanine dyes derived inhibition of insulin fibrillization. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.149] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Dhouafli Z, Cuanalo-Contreras K, Hayouni EA, Mays CE, Soto C, Moreno-Gonzalez I. Inhibition of protein misfolding and aggregation by natural phenolic compounds. Cell Mol Life Sci 2018; 75:3521-3538. [PMID: 30030591 PMCID: PMC11105286 DOI: 10.1007/s00018-018-2872-2] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 06/12/2018] [Accepted: 07/09/2018] [Indexed: 12/17/2022]
Abstract
Protein misfolding and aggregation into fibrillar deposits is a common feature of a large group of degenerative diseases affecting the central nervous system or peripheral organs, termed protein misfolding disorders (PMDs). Despite their established toxic nature, clinical trials aiming to reduce misfolded aggregates have been unsuccessful in treating or curing PMDs. An interesting possibility for disease intervention is the regular intake of natural food or herbal extracts, which contain active molecules that inhibit aggregation or induce the disassembly of misfolded aggregates. Among natural compounds, phenolic molecules are of particular interest, since most have dual activity as amyloid aggregation inhibitors and antioxidants. In this article, we review many phenolic natural compounds which have been reported in diverse model systems to have the potential to delay or prevent the development of various PMDs, including Alzheimer's and Parkinson's diseases, prion diseases, amyotrophic lateral sclerosis, systemic amyloidosis, and type 2 diabetes. The lower toxicity of natural compounds compared to synthetic chemical molecules suggest that they could serve as a good starting point to discover protein misfolding inhibitors that might be useful for the treatment of various incurable diseases.
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Affiliation(s)
- Zohra Dhouafli
- Université de Tunis El Manar, Faculté des Sciences de Tunis, 2092, Tunis, Tunisia
- Laboratory of Aromatic and Medicinal Plants, Center of Biotechnology of Borj-Cédria, BP 901, 2050, Hammam-Lif, Tunisia
| | - Karina Cuanalo-Contreras
- The Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, McGovern Medical School, University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA
| | - El Akrem Hayouni
- Laboratory of Aromatic and Medicinal Plants, Center of Biotechnology of Borj-Cédria, BP 901, 2050, Hammam-Lif, Tunisia
| | - Charles E Mays
- The Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, McGovern Medical School, University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA
| | - Claudio Soto
- The Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, McGovern Medical School, University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA
| | - Ines Moreno-Gonzalez
- The Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, McGovern Medical School, University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
- Department of Cell Biology, Networking Research Center on Neurodegenerative Diseases (CIBERNED), Facultad Ciencias, Universidad de Malaga, Málaga, Spain.
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Giorgetti S, Greco C, Tortora P, Aprile FA. Targeting Amyloid Aggregation: An Overview of Strategies and Mechanisms. Int J Mol Sci 2018; 19:E2677. [PMID: 30205618 PMCID: PMC6164555 DOI: 10.3390/ijms19092677] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 09/02/2018] [Accepted: 09/05/2018] [Indexed: 12/26/2022] Open
Abstract
Amyloids result from the aggregation of a set of diverse proteins, due to either specific mutations or promoting intra- or extra-cellular conditions. Structurally, they are rich in intermolecular β-sheets and are the causative agents of several diseases, both neurodegenerative and systemic. It is believed that the most toxic species are small aggregates, referred to as oligomers, rather than the final fibrillar assemblies. Their mechanisms of toxicity are mostly mediated by aberrant interactions with the cell membranes, with resulting derangement of membrane-related functions. Much effort is being exerted in the search for natural antiamyloid agents, and/or in the development of synthetic molecules. Actually, it is well documented that the prevention of amyloid aggregation results in several cytoprotective effects. Here, we portray the state of the art in the field. Several natural compounds are effective antiamyloid agents, notably tetracyclines and polyphenols. They are generally non-specific, as documented by their partially overlapping mechanisms and the capability to interfere with the aggregation of several unrelated proteins. Among rationally designed molecules, we mention the prominent examples of β-breakers peptides, whole antibodies and fragments thereof, and the special case of drugs with contrasting transthyretin aggregation. In this framework, we stress the pivotal role of the computational approaches. When combined with biophysical methods, in several cases they have helped clarify in detail the protein/drug modes of interaction, which makes it plausible that more effective drugs will be developed in the future.
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Affiliation(s)
- Sofia Giorgetti
- Department of Molecular Medicine, Institute of Biochemistry, University of Pavia, Via Taramelli 3b, 27100 Pavia, Italy.
| | - Claudio Greco
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza 1, 20126 Milano, Italy.
| | - Paolo Tortora
- Department of Biotechnologies and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy.
- Milan Center for Neuroscience (Neuro-MI), 20126 Milano, Italy.
| | - Francesco Antonio Aprile
- Centre for Misfolding Diseases, Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK.
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Ami D, Mereghetti P, Leri M, Giorgetti S, Natalello A, Doglia SM, Stefani M, Bucciantini M. A FTIR microspectroscopy study of the structural and biochemical perturbations induced by natively folded and aggregated transthyretin in HL-1 cardiomyocytes. Sci Rep 2018; 8:12508. [PMID: 30131519 PMCID: PMC6104026 DOI: 10.1038/s41598-018-30995-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 08/09/2018] [Indexed: 02/07/2023] Open
Abstract
Protein misfolding and aggregation are associated with a number of human degenerative diseases. In spite of the enormous research efforts to develop effective strategies aimed at interfering with the pathogenic cascades induced by misfolded/aggregated peptides/proteins, the necessary detailed understanding of the molecular bases of amyloid formation and toxicity is still lacking. To this aim, approaches able to provide a global insight in amyloid-mediated physiological alterations are of importance. In this study, we exploited Fourier transform infrared microspectroscopy, supported by multivariate analysis, to investigate in situ the spectral changes occurring in cultured intact HL-1 cardiomyocytes exposed to wild type (WT) or mutant (L55P) transthyretin (TTR) in native, or amyloid conformation. The presence of extracellular deposits of amyloid aggregates of WT or L55P TTR, respectively, is a key hallmark of two pathological conditions, known as senile systemic amyloidosis and familial amyloid polyneuropathy. We found that the major effects, associated with modifications in lipid properties and in the cell metabolic/phosphorylation status, were observed when natively folded WT or L55P TTR was administered to the cells. The effects induced by aggregates of TTR were milder and in some cases displayed a different timing compared to those elicited by the natively folded protein.
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Affiliation(s)
- Diletta Ami
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Paolo Mereghetti
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy
| | - Manuela Leri
- Department of Neuroscience, Psychology, Area of Medicine and Health of the Child of the University of Florence, Viale Pieraccini, 6, 50139, Florence, Italy.,Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, 50134, Florence, Italy
| | - Sofia Giorgetti
- Department of Molecular Medicine, Unit of Biochemistry, University of Pavia, Viale Taramelli 3/B, 27100, Pavia, Italy
| | - Antonino Natalello
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy
| | - Silvia Maria Doglia
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy
| | - Massimo Stefani
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, 50134, Florence, Italy.,Interuniversity Center for the Study of Neurodegenerative Diseases (CIMN), Florence, Italy
| | - Monica Bucciantini
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, 50134, Florence, Italy. .,Interuniversity Center for the Study of Neurodegenerative Diseases (CIMN), Florence, Italy.
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Phenolic Compounds Isolated from Olive Oil as Nutraceutical Tools for the Prevention and Management of Cancer and Cardiovascular Diseases. Int J Mol Sci 2018; 19:ijms19082305. [PMID: 30082650 PMCID: PMC6121682 DOI: 10.3390/ijms19082305] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 07/25/2018] [Accepted: 08/04/2018] [Indexed: 12/11/2022] Open
Abstract
Non-communicable diseases (NCDs) have become the largest contributor to worldwide morbidity and mortality. Among them, cancer and cardiovascular diseases (CVDs) are responsible for a 47% of worldwide mortality. In general, preventive approaches modifying lifestyle are more cost-effective than treatments after disease onset. In this sense, a healthy diet could help a range of NCDs, such as cancer and CVDs. Traditional Mediterranean Diet (MD) is associated by the low-prevalence of certain types of cancers and CVDs, where olive oil plays an important role. In fact, different epidemiological studies suggest that olive oil consumption prevents some cancers, as well as coronary heart diseases and stroke incidence and mortality. Historically, the beneficial health effects of virgin olive oil (VOO) intake were first attributed to the high concentration of monounsaturated fatty acids. Nowadays, many studies indicate that phenolic compounds contained in olive oil have positive effects on different biomarkers related to health. Among them, phenolic compounds would be partially responsible for health benefits. The present work aims to explore, in studies published during the last five years, the effects of the main phenolic compounds isolated from olive oil on different cancer or CVD aspects, in order to clarify which compounds have more potential to be used as nutraceuticals with preventive or even therapeutic properties.
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Dhouafli Z, Leri M, Bucciantini M, Stefani M, Gadhoumi H, Mahjoub B, Ben Jannet H, Guillard J, Tounsi MS, Ksouri R, Hayouni EA. A new purified Lawsoniaside remodels amyloid-β42 fibrillation into a less toxic and non-amyloidogenic pathway. Int J Biol Macromol 2018; 114:830-835. [DOI: 10.1016/j.ijbiomac.2018.04.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 03/28/2018] [Accepted: 04/03/2018] [Indexed: 10/17/2022]
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Ravi SK, Narasingappa RB, Vincent B. Neuro-nutrients as anti-alzheimer's disease agents: A critical review. Crit Rev Food Sci Nutr 2018; 59:2999-3018. [PMID: 29846084 DOI: 10.1080/10408398.2018.1481012] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Alzheimer's disease (AD) is characterized by a massive neuronal death causing memory loss, cognitive impairment and behavioral alteration that ultimately lead to dementia and death. AD is a multi-factorial pathology controlled by molecular events such as oxidative stress, protein aggregation, mitochondrial dysfunction and neuro inflammation. Nowadays, there is no efficient disease-modifying treatment for AD and epidemiological studies have suggested that diet and nutrition have a significant impact on the development of this disorder. Indeed, some nutrients can protect all kind of cells, including neurons. As prevention is better than cure, life style improvement, with a special emphasis on diet, should seriously be considered as an anti-AD track and intake of nutrients promoting neuronal health is the need of the hour. Diets rich in unsaturated fatty acids, polyphenols and vitamins have been shown to protect against AD, whereas saturated fatty acids-containing diets deprived of polyphenols promote the development of the disease. Thus, Mediterranean diets, mainly composed of fruits, vegetables and omega-3 fatty acids, stand as valuable, mild and preventive anti-AD agents. This review focuses on our current knowledge in the field and how one can fight this devastating neurodegenerative disorder through the simple proper modification of our life style.
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Affiliation(s)
- Sunil K Ravi
- Department of Biotechnology, College of Agriculture, University of Agriculture Sciences , Bangalore , Hassan , Karnataka , India
| | - Ramesh B Narasingappa
- Department of Biotechnology, College of Agriculture, University of Agriculture Sciences , Bangalore , Hassan , Karnataka , India
| | - Bruno Vincent
- Institute of Molecular Biosciences, Mahidol University , Nakhon Pathom , Thailand.,Centre National de la Recherche Scientifique , Paris , France
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Oleuropein aglycone: A polyphenol with different targets against amyloid toxicity. Biochim Biophys Acta Gen Subj 2018; 1862:1432-1442. [DOI: 10.1016/j.bbagen.2018.03.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 02/23/2018] [Accepted: 03/20/2018] [Indexed: 12/29/2022]
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25
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Oleuropein aglycone stabilizes the monomeric α-synuclein and favours the growth of non-toxic aggregates. Sci Rep 2018; 8:8337. [PMID: 29844450 PMCID: PMC5974307 DOI: 10.1038/s41598-018-26645-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 05/15/2018] [Indexed: 01/03/2023] Open
Abstract
α-synuclein plays a key role in the pathogenesis of Parkinson’s disease (PD); its deposits are found as amyloid fibrils in Lewy bodies and Lewy neurites, the histopathological hallmarks of PD. Amyloid fibrillation is a progressive polymerization path starting from peptide/protein misfolding and proceeding through the transient growth of oligomeric intermediates widely considered as the most toxic species. Consequently, a promising approach of intervention against PD might be preventing α-synuclein build-up, misfolding and aggregation. A possible strategy involves the use of small molecules able to slow down the aggregation process or to alter oligomer conformation favouring the growth of non-pathogenic species. Here, we show that oleuropein aglycone (OleA), the main olive oil polyphenol, exhibits anti-amyloidogenic power in vitro by interacting with, and stabilizing, α-synuclein monomers thus hampering the growth of on-pathway oligomers and favouring the growth of stable and harmless aggregates with no tendency to evolve into other cytotoxic amyloids. We investigated the molecular basis of such interference by both biophysical techniques and limited proteolysis; aggregate morphology was monitored by electron microscopy. We also found that OleA reduces the cytotoxicity of α-synuclein aggregates by hindering their binding to cell membrane components and preventing the resulting oxidative damage to cells.
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Dhouafli Z, Leri M, Bucciantini M, Stefani M, Gadhoumi H, Mahjoub B, Ben Jannet H, Guillard J, Ksouri R, Saidani Tounsi M, Soto C, Hayouni EA. 1,2,4-trihydroxynaphthalene-2-O-β-D-glucopyranoside delays amyloid-β 42 aggregation and reduces amyloid cytotoxicity. Biofactors 2018; 44:272-280. [PMID: 29582494 DOI: 10.1002/biof.1422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 02/27/2018] [Accepted: 03/02/2018] [Indexed: 12/13/2022]
Abstract
Presently, misfolding and aggregation of amyloid-β42 (Aβ42 ) are considered early events in Alzheimer's disease (AD) pathogenesis. The use of natural products to inhibit the aggregation process and to protect cells from cytotoxicity of early aggregate grown at the onset of the aggregation path is one of the promising strategies against AD. Recently, we have purified a new powerful antioxidant and inhibitor of Aβ42 aggregation from the leaves of Lawsonia inermis. The new compound was identified as a new Lawsoniaside; 1,2,4-trihydroxynaphthalene-2-O-β-D-glucopyranoside (THNG). Herein, we show that THNG interferes with Aβ42 aggregation, inhibits its conformational change to a β-sheet-rich structure, decreases its polymerization into large fibrillar species, reduces oxidative stress, and aggregate cytotoxicity. These results indicate that THNG has great potential as a neuroprotective and therapeutic agent against AD. © 2018 BioFactors, 44(3):272-280, 2018.
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Affiliation(s)
- Zohra Dhouafli
- Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis 2092, Tunisia
- Laboratoire des Plantes Aromatiques et Médicinales (LPAM- LR15CBBC06), Centre de Biotechnologie de Borj-Cédria, Hammam-Lif, Tunisia
| | - Manuela Leri
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - Monica Bucciantini
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy
| | - Massimo Stefani
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - Hamza Gadhoumi
- Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis 2092, Tunisia
- Laboratoire des Plantes Aromatiques et Médicinales (LPAM- LR15CBBC06), Centre de Biotechnologie de Borj-Cédria, Hammam-Lif, Tunisia
| | - Borhane Mahjoub
- Laboratoire de Chimie, Institut Supérieur Agronomique de Chott Meriem, Sousse, Tunisia
| | - Hichem Ben Jannet
- Laboratoire de Chimie Hétérocyclique, Produits Naturels et Réactivité (LR11ES39), Equipe: Chimie Médicinale et Produits Naturels, Faculté des Sciences de Monastir, Université de Monastir, Tunisie
| | - Jérôme Guillard
- Institut de Chimie des Milieux et Matériaux de Poitiers, IC2MP, UMR CNRS 7285, Poitiers Cedex 9, France
| | - Riadh Ksouri
- Laboratoire des Plantes Aromatiques et Médicinales (LPAM- LR15CBBC06), Centre de Biotechnologie de Borj-Cédria, Hammam-Lif, Tunisia
| | - Moufida Saidani Tounsi
- Laboratoire des Plantes Aromatiques et Médicinales (LPAM- LR15CBBC06), Centre de Biotechnologie de Borj-Cédria, Hammam-Lif, Tunisia
| | - Claudio Soto
- Mitchell Center for Alzheimer's disease and related Brain disorders, University of Texas Medical School at Houston, Houston, TX, USA
| | - El Akrem Hayouni
- Laboratoire des Plantes Aromatiques et Médicinales (LPAM- LR15CBBC06), Centre de Biotechnologie de Borj-Cédria, Hammam-Lif, Tunisia
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Veneziani G, Esposto S, Taticchi A, Urbani S, Selvaggini R, Sordini B, Servili M. Characterization of phenolic and volatile composition of extra virgin olive oil extracted from six Italian cultivars using a cooling treatment of olive paste. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2017.09.034] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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28
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Wu L, Velander P, Liu D, Xu B. Olive Component Oleuropein Promotes β-Cell Insulin Secretion and Protects β-Cells from Amylin Amyloid-Induced Cytotoxicity. Biochemistry 2017; 56:5035-5039. [DOI: 10.1021/acs.biochem.7b00199] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ling Wu
- Department of Biochemistry, ‡Center for Drug Discovery, §Translational Obesity Research Center, ∥School of Neuroscience, and ⊥Department of Human Nutrition, Foods, and Exercise, Virginia Polytechnic Institute & State University, Blacksburg, Virginia 24061, United States
| | - Paul Velander
- Department of Biochemistry, ‡Center for Drug Discovery, §Translational Obesity Research Center, ∥School of Neuroscience, and ⊥Department of Human Nutrition, Foods, and Exercise, Virginia Polytechnic Institute & State University, Blacksburg, Virginia 24061, United States
| | - Dongmin Liu
- Department of Biochemistry, ‡Center for Drug Discovery, §Translational Obesity Research Center, ∥School of Neuroscience, and ⊥Department of Human Nutrition, Foods, and Exercise, Virginia Polytechnic Institute & State University, Blacksburg, Virginia 24061, United States
| | - Bin Xu
- Department of Biochemistry, ‡Center for Drug Discovery, §Translational Obesity Research Center, ∥School of Neuroscience, and ⊥Department of Human Nutrition, Foods, and Exercise, Virginia Polytechnic Institute & State University, Blacksburg, Virginia 24061, United States
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29
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Sartiani L, Bucciantini M, Spinelli V, Leri M, Natalello A, Nosi D, Maria Doglia S, Relini A, Penco A, Giorgetti S, Gerace E, Mannaioni G, Bellotti V, Rigacci S, Cerbai E, Stefani M. Biochemical and Electrophysiological Modification of Amyloid Transthyretin on Cardiomyocytes. Biophys J 2017; 111:2024-2038. [PMID: 27806283 DOI: 10.1016/j.bpj.2016.09.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 07/26/2016] [Accepted: 09/06/2016] [Indexed: 12/26/2022] Open
Abstract
Transthyretin (TTR) amyloidoses are familial or sporadic degenerative conditions that often feature heavy cardiac involvement. Presently, no effective pharmacological therapy for TTR amyloidoses is available, mostly due to a substantial lack of knowledge about both the molecular mechanisms of TTR aggregation in tissue and the ensuing functional and viability modifications that occur in aggregate-exposed cells. TTR amyloidoses are of particular interest regarding the relation between functional and viability impairment in aggregate-exposed excitable cells such as peripheral neurons and cardiomyocytes. In particular, the latter cells provide an opportunity to investigate in parallel the electrophysiological and biochemical modifications that take place when the cells are exposed for various lengths of time to variously aggregated wild-type TTR, a condition that characterizes senile systemic amyloidosis. In this study, we investigated biochemical and electrophysiological modifications in cardiomyocytes exposed to amyloid oligomers or fibrils of wild-type TTR or to its T4-stabilized form, which resists tetramer disassembly, misfolding, and aggregation. Amyloid TTR cytotoxicity results in mitochondrial potential modification, oxidative stress, deregulation of cytoplasmic Ca2+ levels, and Ca2+ cycling. The altered intracellular Ca2+ cycling causes a prolongation of the action potential, as determined by whole-cell recordings of action potentials on isolated mouse ventricular myocytes, which may contribute to the development of cellular arrhythmias and conduction alterations often seen in patients with TTR amyloidosis. Our data add information about the biochemical, functional, and viability alterations that occur in cardiomyocytes exposed to aggregated TTR, and provide clues as to the molecular and physiological basis of heart dysfunction in sporadic senile systemic amyloidosis and familial amyloid cardiomyopathy forms of TTR amyloidoses.
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Affiliation(s)
- Laura Sartiani
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy; Center of Molecular Medicine, University of Florence, Florence, Italy
| | - Monica Bucciantini
- Department of Biomedical, Experimental and Clinical Sciences "Mario Serio,", University of Florence, Florence, Italy; Research Centre on the Molecular Basis of Neurodegeneration, University of Florence, Florence, Italy.
| | - Valentina Spinelli
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy; Center of Molecular Medicine, University of Florence, Florence, Italy
| | - Manuela Leri
- Department of Biomedical, Experimental and Clinical Sciences "Mario Serio,", University of Florence, Florence, Italy
| | - Antonino Natalello
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | - Daniele Nosi
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Silvia Maria Doglia
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | | | - Amanda Penco
- Department of Physics, University of Genoa, Genoa, Italy
| | - Sofia Giorgetti
- Department of Molecular Medicine, Institute of Biochemistry, University of Pavia, Pavia, Italy
| | - Elisabetta Gerace
- Department of Health Science, University of Florence, Florence, Italy
| | - Guido Mannaioni
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - Vittorio Bellotti
- Department of Molecular Medicine, Institute of Biochemistry, University of Pavia, Pavia, Italy; Wolfson Drug Discovery Unit, Centre for Amyloidosis and Acute Phase Proteins, Division of Medicine, University College London, London, United Kingdom
| | - Stefania Rigacci
- Department of Biomedical, Experimental and Clinical Sciences "Mario Serio,", University of Florence, Florence, Italy
| | - Elisabetta Cerbai
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy; Center of Molecular Medicine, University of Florence, Florence, Italy; Research Centre on the Molecular Basis of Neurodegeneration, University of Florence, Florence, Italy
| | - Massimo Stefani
- Department of Biomedical, Experimental and Clinical Sciences "Mario Serio,", University of Florence, Florence, Italy; Research Centre on the Molecular Basis of Neurodegeneration, University of Florence, Florence, Italy
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Catechol-Containing Hydroxylated Biomimetic 4-Thiaflavanes as Inhibitors of Amyloid Aggregation. Biomimetics (Basel) 2017; 2:biomimetics2020006. [PMID: 31105169 PMCID: PMC6477597 DOI: 10.3390/biomimetics2020006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 05/03/2017] [Accepted: 05/04/2017] [Indexed: 01/03/2023] Open
Abstract
The study of compounds able to interfere in various ways with amyloid aggregation is of paramount importance in amyloid research. Molecules characterized by a 4-thiaflavane skeleton have received great attention in chemical, medicinal, and pharmaceutical research. Such molecules, especially polyhydroxylated 4-thiaflavanes, can be considered as structural mimickers of several natural polyphenols that have been previously demonstrated to bind and impair amyloid fibril formation. In this work, we tested five different 4-thiaflavanes on the hen egg-white lysozyme (HEWL) amyloid model for their potential anti-amyloid properties. By combining a thioflavin T assay, atomic force microscopy, and a cell toxicity assay, we demonstrated that such compounds can impair the formation of high-order amyloid aggregates and mature fibrils. Despite this, the tested 4-thiaflavanes, although non-toxic per se, are not able to prevent amyloid toxicity on human neuroblastoma cells. Rather, they proved to block early aggregates in a stable, toxic conformation. Accordingly, 4-thiaflavanes can be proposed for further studies aimed at identifying blocking agents for the study of toxicity mechanisms of amyloid aggregation.
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31
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Casamenti F, Stefani M. Olive polyphenols: new promising agents to combat aging-associated neurodegeneration. Expert Rev Neurother 2016; 17:345-358. [DOI: 10.1080/14737175.2017.1245617] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Fiorella Casamenti
- Department of Neuroscience, Psychology, Division of Pharmacology and Toxicology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - Massimo Stefani
- Department of Biomedical Experimental and Clinical Sciences ‘Mario Serio’, University of Florence, Florence, Italy
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32
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Mechanisms for the inhibition of amyloid aggregation by small ligands. Biosci Rep 2016; 36:BSR20160101. [PMID: 27512096 PMCID: PMC5041158 DOI: 10.1042/bsr20160101] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 08/10/2016] [Indexed: 12/14/2022] Open
Abstract
This work investigates by biochemical, biophysical and MD techniques the opposite anti-amyloid properties of resveratrol and rosmarinic acid on the aggregation of hen egg white lysozyme (HEWL). Differences in association energy and contact maps were found that explain the different behaviours. The formation of amyloid aggregates is the hallmark of systemic and neurodegenerative disorders, also known as amyloidoses. Many proteins have been found to aggregate into amyloid-like fibrils and this process is recognized as a general tendency of polypeptides. Lysozyme, an antibacterial protein, is a well-studied model since it is associated in human with systemic amyloidosis and that is widely available from chicken eggs (HEWL, hen egg white lysozyme). In the present study we investigated the mechanism of interaction of aggregating HEWL with rosmarinic acid and resveratrol, that we verified to be effective and ineffective, respectively, in inhibiting aggregate formation. We used a multidisciplinary strategy to characterize such effects, combining biochemical and biophysical methods with molecular dynamics (MD) simulations on the HEWL peptide 49–64 to gain insights into the mechanisms and energy variations associated to amyloid formation and inhibition. MD revealed that neither resveratrol nor rosmarinic acid were able to compete with the initial formation of the β-sheet structure. We then tested the association of two β-sheets, representing the model of an amyloid core structure. MD showed that rosmarinic acid displayed an interaction energy and a contact map comparable to that of sheet pairings. On the contrary, resveratrol association energy was found to be much lower and its contact map largely different than that of sheet pairings. The overall characterization elucidated a possible mechanism explaining why, in this model, resveratrol is inactive in blocking fibril formation, whereas rosmarinic acid is instead a powerful inhibitor.
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Ortore G, Orlandini E, Braca A, Ciccone L, Rossello A, Martinelli A, Nencetti S. Targeting Different Transthyretin Binding Sites with Unusual Natural Compounds. ChemMedChem 2016; 11:1865-74. [PMID: 27159149 DOI: 10.1002/cmdc.201600092] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 03/14/2016] [Indexed: 11/10/2022]
Abstract
Misfolding and aggregation of the transthyretin (TTR) protein leads to certain forms of amyloidosis. Some nutraceuticals, such as flavonoids and natural polyphenols, have recently been investigated as modulators of the self-assembly process of TTR, but they generally suffer from limited bioavailability. To discover innovative and more bioavailable natural compounds able to inhibit TTR amyloid formation, a docking study was performed using the crystallographic structure of TTR. This computational strategy was projected as an ad hoc inspection of the possible relationship between binding site location and modulation of the assembly process; interactions with the as-yet-unexplored epigallocatechin gallate (EGCG) sites and with the thyroxine (T4) pocket were simultaneously analyzed. All the compounds studied seem to prefer the traditional T4 binding site, but some interesting results emerged from the screening of an in-house database, used for validating the computational protocol, and of the Herbal Ingredients Targets (HIT) catalogue available on the ZINC database.
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Affiliation(s)
- Gabriella Ortore
- Dipartimento di Farmacia, Università di Pisa, V. Bonanno 6, 56126, Pisa, Italy.
| | | | - Alessandra Braca
- Dipartimento di Farmacia, Università di Pisa, V. Bonanno 6, 56126, Pisa, Italy
| | - Lidia Ciccone
- Dipartimento di Farmacia, Università di Pisa, V. Bonanno 6, 56126, Pisa, Italy
| | - Armando Rossello
- Dipartimento di Farmacia, Università di Pisa, V. Bonanno 6, 56126, Pisa, Italy
| | - Adriano Martinelli
- Dipartimento di Farmacia, Università di Pisa, V. Bonanno 6, 56126, Pisa, Italy
| | - Susanna Nencetti
- Dipartimento di Farmacia, Università di Pisa, V. Bonanno 6, 56126, Pisa, Italy.
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