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Jayawickreme DK, Ekwosi C, Anand A, Andres-Mach M, Wlaź P, Socała K. Luteolin for neurodegenerative diseases: a review. Pharmacol Rep 2024:10.1007/s43440-024-00610-8. [PMID: 38904713 DOI: 10.1007/s43440-024-00610-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 06/04/2024] [Accepted: 06/05/2024] [Indexed: 06/22/2024]
Abstract
Neurodegenerative diseases such as Parkinson's disease, Alzheimer's disease, Huntington's disease, and multiple sclerosis affect millions of people around the world. In addition to age, which is a key factor contributing to the development of all neurodegenerative diseases, genetic and environmental components are also important risk factors. Current methods of treating neurodegenerative diseases are mostly symptomatic and do not eliminate the cause of the disease. Many studies focus on searching for natural substances with neuroprotective properties that could be used as an adjuvant therapy in the inhibition of the neurodegeneration process. These compounds include flavonoids, such as luteolin, showing significant anti-inflammatory, antioxidant, and neuroprotective activity. Increasing evidence suggests that luteolin may confer protection against neurodegeneration. In this review, we summarize the scientific reports from preclinical in vitro and in vivo studies regarding the beneficial effects of luteolin in neurodegenerative diseases. Luteolin was studied most extensively in various models of Alzheimer's disease but there are also several reports showing its neuroprotective effects in models of Parkinson's disease. Though very limited, studies on possible protective effects of luteolin against Huntington's disease and multiple sclerosis are also discussed here. Overall, although preclinical studies show the potential benefits of luteolin in neurodegenerative disorders, clinical evidence on its therapeutic efficacy is still deficient.
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Affiliation(s)
| | - Cletus Ekwosi
- Faculty of Biology and Biotechnology, Maria Curie-Skłodowska University, Akademicka 19, Lublin, 20-033, PL, Poland
| | - Apurva Anand
- Faculty of Biology and Biotechnology, Maria Curie-Skłodowska University, Akademicka 19, Lublin, 20-033, PL, Poland
| | - Marta Andres-Mach
- Department of Experimental Pharmacology, Institute of Rural Health, Jaczewskiego 2, Lublin, 20-950, Poland
| | - Piotr Wlaź
- Department of Animal Physiology and Pharmacology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Akademicka 19, Lublin, 20-033, PL, Poland
| | - Katarzyna Socała
- Department of Animal Physiology and Pharmacology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Akademicka 19, Lublin, 20-033, PL, Poland.
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2
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Kovacheva E, Gevezova M, Maes M, Sarafian V. Mast Cells in Autism Spectrum Disorder-The Enigma to Be Solved? Int J Mol Sci 2024; 25:2651. [PMID: 38473898 DOI: 10.3390/ijms25052651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 02/19/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024] Open
Abstract
Autism Spectrum Disorder (ASD) is a disturbance of neurodevelopment with a complicated pathogenesis and unidentified etiology. Many children with ASD have a history of "allergic symptoms", often in the absence of mast cell (MC)-positive tests. Activation of MCs by various stimuli may release molecules related to inflammation and neurotoxicity, contributing to the development of ASD. The aim of the present paper is to enrich the current knowledge on the relationship between MCs and ASD by discussing key molecules and immune pathways associated with MCs in the pathogenesis of autism. Cytokines, essential marker molecules for MC degranulation and therapeutic targets, are also highlighted. Understanding the relationship between ASD and the activation of MCs, as well as the involved molecules and interactions, are the main points contributing to solving the enigma. Key molecules, associated with MCs, may provide new insights to the discovery of drug targets for modeling inflammation in ASD.
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Affiliation(s)
- Eleonora Kovacheva
- Department of Medical Biology, Medical University-Plovdiv, 4000 Plovdiv, Bulgaria
- Research Institute, Medical University-Plovdiv, 4000 Plovdiv, Bulgaria
| | - Maria Gevezova
- Department of Medical Biology, Medical University-Plovdiv, 4000 Plovdiv, Bulgaria
- Research Institute, Medical University-Plovdiv, 4000 Plovdiv, Bulgaria
| | - Michael Maes
- Research Institute, Medical University-Plovdiv, 4000 Plovdiv, Bulgaria
- Sichuan Provincial Center for Mental Health, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, China
- Key Laboratory of Psychosomatic Medicine, Chinese Academy of Medical Sciences, Chengdu 610072, China
- Department of Psychiatry, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
- Cognitive Fitness and Technology Research Unit, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
- Department of Psychiatry, Medical University-Plovdiv, 4000 Plovdiv, Bulgaria
- Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Victoria Sarafian
- Department of Medical Biology, Medical University-Plovdiv, 4000 Plovdiv, Bulgaria
- Research Institute, Medical University-Plovdiv, 4000 Plovdiv, Bulgaria
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Shah MA, Faheem HI, Hamid A, Yousaf R, Haris M, Saleem U, Shah GM, Alhasani RH, Althobaiti NA, Alsharif I, Silva AS. The entrancing role of dietary polyphenols against the most frequent aging-associated diseases. Med Res Rev 2024; 44:235-274. [PMID: 37486109 DOI: 10.1002/med.21985] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 01/27/2023] [Accepted: 07/06/2023] [Indexed: 07/25/2023]
Abstract
Aging, a fundamental physiological process influenced by innumerable biological and genetic pathways, is an important driving factor for several aging-associated disorders like diabetes mellitus, osteoporosis, cancer, and neurodegenerative diseases including Alzheimer's and Parkinson's diseases. In the modern era, the several mechanisms associated with aging have been deeply studied. Treatment and therapeutics for age-related diseases have also made considerable advances; however, for the effective and long-lasting treatment, nutritional therapy particularly including dietary polyphenols from the natural origin are endorsed. These dietary polyphenols (e.g., apigenin, baicalin, curcumin, epigallocatechin gallate, kaempferol, quercetin, resveratrol, and theaflavin), and many other phytochemicals target certain molecular, genetic mechanisms. The most common pathways of age-associated diseases are mitogen-activated protein kinase, reactive oxygen species production, nuclear factor kappa light chain enhancer of activated B cells signaling pathways, metal chelation, c-Jun N-terminal kinase, and inflammation. Polyphenols slow down the course of aging and help in combatting age-linked disorders. This exemplified in the form of clinical trials on specific dietary polyphenols in various aging-associated diseases. With this context in mind, this review reveals the new insights to slow down the aging process, and consequently reduce some classic diseases associated with age such as aforementioned, and targeting age-associated diseases by the activities of dietary polyphenols of natural origin.
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Affiliation(s)
| | - Hafiza Ishmal Faheem
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad, Pakistan
| | - Ayesha Hamid
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad, Pakistan
| | - Rimsha Yousaf
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad, Pakistan
| | - Muhammad Haris
- Faculty of Pharmaceutical Sciences, Universiteit Gent, Ghent, Belgium
| | - Uzma Saleem
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad, Pakistan
| | - Ghulam Mujtaba Shah
- Department of Botany, Faculty of Health and Biological Sciences, Hazara University, Mansehra, Pakistan
| | - Reem H Alhasani
- Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Norah A Althobaiti
- Department of Biology, College of Science and Humanities, Shaqra University, Al-Quwaiiyah, Saudi Arabia
| | - Ifat Alsharif
- Department of Biology, Jamoum University College, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Ana Sanches Silva
- National Institute for Agrarian and Veterinary Research (INIAV), I.P., Rua dos Lágidos, Lugar da Madalena, Vairão, Vila do Conde, Portugal
- University of Coimbra, Faculty of Pharmacy, Polo III, Azinhaga de St Comba, Coimbra, Portugal
- Centre for Animal Science Studies (CECA), ICETA, University of Porto, Porto, Portugal
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4
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Goyal A, Solanki K, Verma A. Luteolin: Nature's promising warrior against Alzheimer's and Parkinson's disease. J Biochem Mol Toxicol 2024; 38:e23619. [PMID: 38091364 DOI: 10.1002/jbt.23619] [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: 07/27/2023] [Revised: 11/06/2023] [Accepted: 11/28/2023] [Indexed: 01/18/2024]
Abstract
Neurodegenerative disorders (NDs) are defined as the slow loss of a group of neurons that are particularly sensitive. Due to the intricate pathophysiological processes underlying neurodegeneration, no cure exists for these conditions despite the extensive research and advances in our knowledge of the onset and course of NDs. Hence, there is a medical need for the creation of a novel therapeutic approach for NDs. By focusing on numerous signaling pathways, some natural substances derived from medicinal herbs and foods have demonstrated potent activity in treating various NDs. In this context, flavonoids have recently attracted increased popularity and research attention because of their alleged beneficial effects on health. By acting as antioxidant substances, nutritional supplements made up of flavonoids have been found to lessen the extent of NDs like Alzheimer's disease (AD) and Parkinson's disease (PD). Luteolin is a flavone that possesses potent antioxidant and anti-inflammatory properties. As a consequence, luteolin has emerged as an option for treatment with therapeutic effects on many brain disorders. More research has focused on luteolin's diverse biological targets as well as diverse signaling pathways, implying its potential medicinal properties in several NDs. This review emphasizes the possible use of luteolin as a drug of choice for the treatment as well as the management of AD and PD. In addition, this review recommends that further research should be carried out on luteolin as a potential treatment for AD and PD alongside a focus on mechanisms and clinical studies.
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Affiliation(s)
- Ahsas Goyal
- Department of Pharmacology, Institute of Pharmaceutical Research, GLA University, Mathura, Uttar Pradesh, India
| | - Kunal Solanki
- Department of Pharmacology, Institute of Pharmaceutical Research, GLA University, Mathura, Uttar Pradesh, India
| | - Aanchal Verma
- Department of Pharmacology, Institute of Pharmaceutical Research, GLA University, Mathura, Uttar Pradesh, India
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Zhang Q, Yan Y. The role of natural flavonoids on neuroinflammation as a therapeutic target for Alzheimer's disease: a narrative review. Neural Regen Res 2023; 18:2582-2591. [PMID: 37449593 DOI: 10.4103/1673-5374.373680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023] Open
Abstract
Alzheimer's disease is a neurodegenerative disease that affects a large proportion of older adult people and is characterized by memory loss, progressive cognitive impairment, and various behavioral disturbances. Although the pathological mechanisms underlying Alzheimer's disease are complex and remain unclear, previous research has identified two widely accepted pathological characteristics: extracellular neuritic plaques containing amyloid beta peptide, and intracellular neurofibrillary tangles containing tau. Furthermore, research has revealed the significant role played by neuroinflammation over recent years. The inflammatory microenvironment mainly consists of microglia, astrocytes, the complement system, chemokines, cytokines, and reactive oxygen intermediates; collectively, these factors can promote the pathological process and aggravate the severity of Alzheimer's disease. Therefore, the development of new drugs that can target neuroinflammation will be a significant step forward for the treatment of Alzheimer's disease. Flavonoids are plant-derived secondary metabolites that possess various bioactivities. Previous research found that multiple natural flavonoids could exert satisfactory treatment effects on the neuroinflammation associated with Alzheimer's disease. In this review, we describe the pathogenesis and neuroinflammatory processes of Alzheimer's disease, and summarize the effects and mechanisms of 13 natural flavonoids (apigenin, luteolin, naringenin, quercetin, morin, kaempferol, fisetin, isoquercitrin, astragalin, rutin, icariin, mangiferin, and anthocyanin) derived from plants or medicinal herbs on neuroinflammation in Alzheimer's disease. As an important resource for the development of novel compounds for the treatment of critical diseases, it is essential that we focus on the exploitation of natural products. In particular, it is vital that we investigate the effects of flavonoids on the neuroinflammation associated with Alzheimer's disease in greater detail.
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Affiliation(s)
- Qian Zhang
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China; Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, The Ministry of Education; College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi Province, China
| | - Yaping Yan
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China; Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, The Ministry of Education; College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi Province, China
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Preet G, Haj Hasan A, Ramlagan P, Fawdar S, Boulle F, Jaspars M. Anti-Neurodegenerating Activity: Structure-Activity Relationship Analysis of Flavonoids. Molecules 2023; 28:7188. [PMID: 37894669 PMCID: PMC10609304 DOI: 10.3390/molecules28207188] [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: 09/29/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
An anti-neurodegeneration activity study was carried out for 80 flavonoid compounds. The structure-activity analysis of the structures was carried out by performing three different anti-neurodegeneration screening tests, showing that in these structures, the presence of a hydroxy substituent group at position C3' as well as C5' of ring B and a methoxy substituent group at the C7 position of ring A play a vital role in neuroprotective and antioxidant as well as anti-inflammatory activity. Further, we found structure (5) was the top-performing active structure out of 80 structures. Subsequently, a molecular docking study was carried out for the 3 lead flavonoid compounds (4), (5), and (23) and 21 similar hypothetical proposed structures to estimate the binding strength between the tested compounds and proteins potentially involved in disease causation. Ligand-based pharmacophores were generated to guide future drug design studies.
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Affiliation(s)
- Gagan Preet
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (G.P.); (A.H.H.)
| | - Ahlam Haj Hasan
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (G.P.); (A.H.H.)
- Department of Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid 22110, Jordan
| | | | - Shameem Fawdar
- Axonova Ltd., Grand Port 51405, Mauritius; (P.R.); (S.F.); (F.B.)
| | - Fabien Boulle
- Axonova Ltd., Grand Port 51405, Mauritius; (P.R.); (S.F.); (F.B.)
| | - Marcel Jaspars
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (G.P.); (A.H.H.)
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Reza-Zaldívar E, Jacobo-Velázquez DA. Comprehensive Review of Nutraceuticals against Cognitive Decline Associated with Alzheimer's Disease. ACS OMEGA 2023; 8:35499-35522. [PMID: 37810693 PMCID: PMC10552500 DOI: 10.1021/acsomega.3c04855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 09/07/2023] [Indexed: 10/10/2023]
Abstract
Nowadays, nutraceuticals are being incorporated into functional foods or used as supplements with nonpharmacological approaches in the prevention and management of several illnesses, including age-related conditions and chronic neurodegenerative diseases. Nutraceuticals are apt for preventing and treating such disorders because of their nontoxic, non-habit-forming, and efficient bioactivities for promoting neurological well-being due to their ability to influence cellular processes such as neurogenesis, synaptogenesis, synaptic transmission, neuro-inflammation, oxidative stress, cell death modulation, and neuronal survival. The capacity of nutraceuticals to modify all of these processes reveals the potential to develop food-based strategies to aid brain development and enhance brain function, prevent and ameliorate neurodegeneration, and possibly reverse the cognitive impairment observed in Alzheimer's disease, the most predominant form of dementia in the elderly. The current review summarizes the experimental evidence of the neuroprotective capacity of nutraceuticals against Alzheimer's disease, describing their mechanisms of action and the in vitro and in vivo models applied to evaluate their neuroprotective potential.
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Affiliation(s)
- Edwin
E. Reza-Zaldívar
- Tecnologico
de Monterrey, Institute for Obesity Research, Av. Eugenio Garza Sada 2501 Sur, C. 64849 Monterrey, NL, Mexico
| | - Daniel A. Jacobo-Velázquez
- Tecnologico
de Monterrey, Institute for Obesity Research, Av. Eugenio Garza Sada 2501 Sur, C. 64849 Monterrey, NL, Mexico
- Tecnologico
de Monterrey, Escuela de Ingeniería
y Ciencias, Campus Guadalajara, Av. General Ramon Corona 2514, C. 45201 Zapopan, Jalisco, Mexico
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Hasan S, Khatri N, Rahman ZN, Menezes AA, Martini J, Shehjar F, Mujeeb N, Shah ZA. Neuroprotective Potential of Flavonoids in Brain Disorders. Brain Sci 2023; 13:1258. [PMID: 37759859 PMCID: PMC10526484 DOI: 10.3390/brainsci13091258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/09/2023] [Accepted: 08/23/2023] [Indexed: 09/29/2023] Open
Abstract
Flavonoids are a large subgroup of polyphenols known to be sourced from over 6000 natural products, including fruits, vegetables, bark, and herbs. Due to their antioxidant properties, flavonoids have been implicated as a therapy source for many diseases and conditions, including inflammation, vasculitis, venous insufficiency, and hemorrhoids. Currently, some flavonoids are being researched for their antioxidant ability concerning neuroprotection. These flavonoids can penetrate the blood-brain barrier and, depending on the specific flavonoid, retain adequate bioavailability in certain brain regions. Further data suggest that flavonoids could have a strong anti-inflammatory effect in the brain, which not only could be a robust therapeutic source for known neuroinflammatory diseases such as Alzheimer's Disease or Parkinson's Disease but also could be a therapeutic source for ischemic or hemorrhagic conditions such as a stroke. While flavonoid toxicity exists, they are relatively safe and non-invasive drugs from natural origins. As such, exploring the known mechanisms and therapies may highlight and establish flavonoid therapy as a viable source of therapy for stroke patients. As stated, many flavonoids are already being isolated, purified, and implemented in both in vitro and in vivo experiments. As these flavonoids proceed to clinical trials, it will be important to understand how they function as a therapy, primarily as antioxidants, and by other secondary mechanisms. This review aims to elucidate those mechanisms and explore the neuroprotective role of flavonoids.
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Affiliation(s)
- Syed Hasan
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, The University of Toledo, 3000 Arlington Avenue, Toledo, OH 43614, USA
| | - Nabeel Khatri
- Department of Medicinal and Biological Chemistry, The University of Toledo, 3000 Arlington Avenue, Toledo, OH 43614, USA
| | - Zainab N. Rahman
- Department of Medicinal and Biological Chemistry, The University of Toledo, 3000 Arlington Avenue, Toledo, OH 43614, USA
| | - Amanda A. Menezes
- Department of Medicinal and Biological Chemistry, The University of Toledo, 3000 Arlington Avenue, Toledo, OH 43614, USA
| | - Joud Martini
- Department of Medicinal and Biological Chemistry, The University of Toledo, 3000 Arlington Avenue, Toledo, OH 43614, USA
| | - Faheem Shehjar
- Department of Medicinal and Biological Chemistry, The University of Toledo, 3000 Arlington Avenue, Toledo, OH 43614, USA
| | - Numa Mujeeb
- Department of Medicinal and Biological Chemistry, The University of Toledo, 3000 Arlington Avenue, Toledo, OH 43614, USA
| | - Zahoor A. Shah
- Department of Medicinal and Biological Chemistry, The University of Toledo, 3000 Arlington Avenue, Toledo, OH 43614, USA
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Theoharides TC, Kempuraj D. Potential Role of Moesin in Regulating Mast Cell Secretion. Int J Mol Sci 2023; 24:12081. [PMID: 37569454 PMCID: PMC10418457 DOI: 10.3390/ijms241512081] [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: 06/27/2023] [Revised: 07/20/2023] [Accepted: 07/24/2023] [Indexed: 08/13/2023] Open
Abstract
Mast cells have existed for millions of years in species that never suffer from allergic reactions. Hence, in addition to allergies, mast cells can play a critical role in homeostasis and inflammation via secretion of numerous vasoactive, pro-inflammatory and neuro-sensitizing mediators. Secretion may utilize different modes that involve the cytoskeleton, but our understanding of the molecular mechanisms regulating secretion is still not well understood. The Ezrin/Radixin/Moesin (ERM) family of proteins is involved in linking cell surface-initiated signaling to the actin cytoskeleton. However, how ERMs may regulate secretion from mast cells is still poorly understood. ERMs contain two functional domains connected through a long α-helix region, the N-terminal FERM (band 4.1 protein-ERM) domain and the C-terminal ERM association domain (C-ERMAD). The FERM domain and the C-ERMAD can bind to each other in a head-to-tail manner, leading to a closed/inactive conformation. Typically, phosphorylation on the C-terminus Thr has been associated with the activation of ERMs, including secretion from macrophages and platelets. It has previously been shown that the ability of the so-called mast cell "stabilizer" disodium cromoglycate (cromolyn) to inhibit secretion from rat mast cells closely paralleled the phosphorylation of a 78 kDa protein, which was subsequently shown to be moesin, a member of ERMs. Interestingly, the phosphorylation of moesin during the inhibition of mast cell secretion was on the N-terminal Ser56/74 and Thr66 residues. This phosphorylation pattern could lock moesin in its inactive state and render it inaccessible to binding to the Soluble NSF attachment protein receptors (SNAREs) and synaptosomal-associated proteins (SNAPs) critical for exocytosis. Using confocal microscopic imaging, we showed moesin was found to colocalize with actin and cluster around secretory granules during inhibition of secretion. In conclusion, the phosphorylation pattern and localization of moesin may be important in the regulation of mast cell secretion and could be targeted for the development of effective inhibitors of secretion of allergic and inflammatory mediators from mast cells.
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Affiliation(s)
- Theoharis C. Theoharides
- Institute for Neuro-Immune Medicine, Dr. Kiran C. Patel College of Osteopathic Medicine, Nova Southeastern University, Fort Lauderdale, FL 33328, USA;
- Laboratory of Molecular Immunopharmacology and Drug Discovery, Department of Immunology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Duraisamy Kempuraj
- Institute for Neuro-Immune Medicine, Dr. Kiran C. Patel College of Osteopathic Medicine, Nova Southeastern University, Fort Lauderdale, FL 33328, USA;
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Pluta R, Miziak B, Czuczwar SJ. Apitherapy in Post-Ischemic Brain Neurodegeneration of Alzheimer's Disease Proteinopathy: Focus on Honey and Its Flavonoids and Phenolic Acids. Molecules 2023; 28:5624. [PMID: 37570596 PMCID: PMC10420307 DOI: 10.3390/molecules28155624] [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: 06/30/2023] [Revised: 07/20/2023] [Accepted: 07/22/2023] [Indexed: 08/13/2023] Open
Abstract
Neurodegeneration of the brain after ischemia is a major cause of severe, long-term disability, dementia, and mortality, which is a global problem. These phenomena are attributed to excitotoxicity, changes in the blood-brain barrier, neuroinflammation, oxidative stress, vasoconstriction, cerebral amyloid angiopathy, amyloid plaques, neurofibrillary tangles, and ultimately neuronal death. In addition, genetic factors such as post-ischemic changes in genetic programming in the expression of amyloid protein precursor, β-secretase, presenilin-1 and -2, and tau protein play an important role in the irreversible progression of post-ischemic neurodegeneration. Since current treatment is aimed at preventing symptoms such as dementia and disability, the search for causative therapy that would be helpful in preventing and treating post-ischemic neurodegeneration of Alzheimer's disease proteinopathy is ongoing. Numerous studies have shown that the high contents of flavonoids and phenolic acids in honey have antioxidant, anti-inflammatory, anti-apoptotic, anti-amyloid, anti-tau protein, anticholinesterase, serotonergic, and AMPAK activities, influencing signal transmission and neuroprotective effects. Notably, in many preclinical studies, flavonoids and phenolic acids, the main components of honey, were also effective when administered after ischemia, suggesting their possible use in promoting recovery in stroke patients. This review provides new insight into honey's potential to prevent brain ischemia as well as to ameliorate damage in advanced post-ischemic brain neurodegeneration.
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Affiliation(s)
- Ryszard Pluta
- Department of Pathophysiology, Medical University of Lublin, 20-090 Lublin, Poland; (B.M.); (S.J.C.)
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Oswal M, Varghese R, Zagade T, Dhatrak C, Sharma R, Kumar D. Dietary supplements and medicinal plants in urolithiasis: diet, prevention, and cure. J Pharm Pharmacol 2023:7148056. [PMID: 37130140 DOI: 10.1093/jpp/rgac092] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 11/16/2022] [Indexed: 05/03/2023]
Abstract
BACKGROUND Urolithiasis has been a major health concern for centuries, primarily owing to the limited treatment options in the physician's armamentarium. However, various studies have underscored a lesser incidence of urolithiasis in cohorts predominantly consuming fruits and vegetables. This article aims to review various dietary plants, medicinal herbs and phytochemicals in the prevention and management of urolithiasis. METHODS To provide context and evidence, relevant publications were identified on Google Scholar, PubMed and Science-Direct using keywords such as urolithiasis, nephrolithiasis, urolithiasis, renal stones, phytochemicals and dietary plants. RESULTS Growing bodies of evidence suggest the incorporation of plant-based foods, medicinal and herbal supplements, and crude drugs containing phytochemicals into the staple diet of people. The anti-urolithiatic activity of these plant bioactives can be attributed to their antioxidant, antispasmodic, diuretic, and inhibitory effect on the crystallization, nucleation and crystal aggregation effects. These mechanisms would help alleviate the events and symptoms that aid in the development and progression of renal calculi. In addition, it will also avoid the exacerbation of secondary disorders like inflammation and injury, which can initiate a vicious circle in turn worsening the disease progression. CONCLUSION In conclusion, the results presented in the review demonstrate the promising role of various dietary plants, medicinal and herbal supplements, and phytochemicals in preventing and managing the precipitation of uroliths. However, more conclusive and cogent evidence from preclinical and clinical studies is required to substantiate their safety, efficacy and toxicity profiles in humans.
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Affiliation(s)
- Mitul Oswal
- Poona College of Pharmacy, Bharati Vidyapeeth (Deemed to be) University, Pune Maharashtra, 411038, India
| | - Ryan Varghese
- Poona College of Pharmacy, Bharati Vidyapeeth (Deemed to be) University, Pune Maharashtra, 411038, India
| | - Tanmay Zagade
- Poona College of Pharmacy, Bharati Vidyapeeth (Deemed to be) University, Pune Maharashtra, 411038, India
| | - Chetan Dhatrak
- Poona College of Pharmacy, Bharati Vidyapeeth (Deemed to be) University, Pune Maharashtra, 411038, India
| | - Rohit Sharma
- Department of Rasa Shastra and Bhaishajya Kalpana, Faculty of Ayurveda, Institute of Medical Sciences, Banaras Hindu University, Varanasi-221005, Uttar Pradesh, India
| | - Dileep Kumar
- Poona College of Pharmacy, Bharati Vidyapeeth (Deemed to be) University, Pune Maharashtra, 411038, India
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12
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Müller L, Di Benedetto S. Aged brain and neuroimmune responses to COVID-19: post-acute sequelae and modulatory effects of behavioral and nutritional interventions. Immun Ageing 2023; 20:17. [PMID: 37046272 PMCID: PMC10090758 DOI: 10.1186/s12979-023-00341-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 04/03/2023] [Indexed: 04/14/2023]
Abstract
Advanced age is one of the significant risk determinants for coronavirus disease 2019 (COVID-19)-related mortality and for long COVID complications. The contributing factors may include the age-related dynamical remodeling of the immune system, known as immunosenescence and chronic low-grade systemic inflammation. Both of these factors may induce an inflammatory milieu in the aged brain and drive the changes in the microenvironment of neurons and microglia, which are characterized by a general condition of chronic inflammation, so-called neuroinflammation. Emerging evidence reveals that the immune privilege in the aging brain may be compromised. Resident brain cells, such as astrocytes, neurons, oligodendrocytes and microglia, but also infiltrating immune cells, such as monocytes, T cells and macrophages participate in the complex intercellular networks and multiple reciprocal interactions. Especially changes in microglia playing a regulatory role in inflammation, contribute to disturbing of the brain homeostasis and to impairments of the neuroimmune responses. Neuroinflammation may trigger structural damage, diminish regeneration, induce neuronal cell death, modulate synaptic remodeling and in this manner negatively interfere with the brain functions.In this review article, we give insights into neuroimmune interactions in the aged brain and highlight the impact of COVID-19 on the functional systems already modulated by immunosenescence and neuroinflammation. We discuss the potential ways of these interactions with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and review proposed neuroimmune mechanisms and biological factors that may contribute to the development of persisting long COVID conditions. We summarize the potential mechanisms responsible for long COVID, including inflammation, autoimmunity, direct virus-mediated cytotoxicity, hypercoagulation, mitochondrial failure, dysbiosis, and the reactivation of other persisting viruses, such as the Cytomegalovirus (CMV). Finally, we discuss the effects of various interventional options that can decrease the propagation of biological, physiological, and psychosocial stressors that are responsible for neuroimmune activation and which may inhibit the triggering of unbalanced inflammatory responses. We highlight the modulatory effects of bioactive nutritional compounds along with the multimodal benefits of behavioral interventions and moderate exercise, which can be applied as postinfectious interventions in order to improve brain health.
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Affiliation(s)
- Ludmila Müller
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Lentzeallee 94, 14195, Berlin, Germany.
| | - Svetlana Di Benedetto
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Lentzeallee 94, 14195, Berlin, Germany
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13
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Qiu M, Wei W, Zhang J, Wang H, Bai Y, Guo DA. A Scientometric Study to a Critical Review on Promising Anticancer and Neuroprotective Compounds: Citrus Flavonoids. Antioxidants (Basel) 2023; 12:antiox12030669. [PMID: 36978916 PMCID: PMC10045114 DOI: 10.3390/antiox12030669] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/20/2023] [Accepted: 02/23/2023] [Indexed: 03/12/2023] Open
Abstract
Flavonoids derived from citrus plants are favored by phytomedicinal researchers due to their wide range of biological activities, and relevant studies have been sustained for 67 years (since the first paper published in 1955). In terms of a scientometric and critical review, the scientometrics of related papers, chemical structures, and pharmacological action of citrus flavonoids were comprehensively summarized. The modern pharmacological effects of citrus flavonoids are primarily focused on their anticancer activities (such as breast cancer, gastric cancer, lung cancer, and liver cancer), neuroprotective effects (such as anti-Alzheimer’s disease, Parkinson’s disease), and metabolic diseases. Furthermore, the therapeutic mechanism of cancers (including inducing apoptosis, inhibiting cell proliferation, and inhibiting cancer metastasis), neuroprotective effects (including antioxidant and anti-inflammatory), and metabolic diseases (such as non-alcoholic fatty liver disease, type 2 diabetes mellitus) were summarized and discussed. We anticipate that this review could provide an essential reference for anti-cancer and neuroprotective research of citrus flavonoids and provide researchers with a comprehensive understanding of citrus flavonoids.
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Affiliation(s)
- Mingyang Qiu
- College of Pharmacy, Changchun University of Chinese Medicine, Changchun 130117, China
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Research Center of TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Wenlong Wei
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Research Center of TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Jianqing Zhang
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Research Center of TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Hanze Wang
- College of Pharmacy, Changchun University of Chinese Medicine, Changchun 130117, China
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Research Center of TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yuxin Bai
- College of Pharmacy, Changchun University of Chinese Medicine, Changchun 130117, China
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Research Center of TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - De-an Guo
- College of Pharmacy, Changchun University of Chinese Medicine, Changchun 130117, China
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Research Center of TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- Correspondence:
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14
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Theoharides TC, Kempuraj D. Role of SARS-CoV-2 Spike-Protein-Induced Activation of Microglia and Mast Cells in the Pathogenesis of Neuro-COVID. Cells 2023; 12:688. [PMID: 36899824 PMCID: PMC10001285 DOI: 10.3390/cells12050688] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/07/2023] [Accepted: 02/16/2023] [Indexed: 02/24/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes coronavirus disease 2019 (COVID-19). About 45% of COVID-19 patients experience several symptoms a few months after the initial infection and develop post-acute sequelae of SARS-CoV-2 (PASC), referred to as "Long-COVID," characterized by persistent physical and mental fatigue. However, the exact pathogenetic mechanisms affecting the brain are still not well-understood. There is increasing evidence of neurovascular inflammation in the brain. However, the precise role of the neuroinflammatory response that contributes to the disease severity of COVID-19 and long COVID pathogenesis is not clearly understood. Here, we review the reports that the SARS-CoV-2 spike protein can cause blood-brain barrier (BBB) dysfunction and damage neurons either directly, or via activation of brain mast cells and microglia and the release of various neuroinflammatory molecules. Moreover, we provide recent evidence that the novel flavanol eriodictyol is particularly suited for development as an effective treatment alone or together with oleuropein and sulforaphane (ViralProtek®), all of which have potent anti-viral and anti-inflammatory actions.
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Affiliation(s)
- Theoharis C. Theoharides
- Institute for Neuro-Immune Medicine, Dr. Kiran C. Patel College of Osteopathic Medicine, Nova Southeastern University, Fort Lauderdale, FL 33328, USA
- Laboratory of Molecular Immunopharmacology and Drug Discovery, Department of Immunology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Duraisamy Kempuraj
- Institute for Neuro-Immune Medicine, Dr. Kiran C. Patel College of Osteopathic Medicine, Nova Southeastern University, Fort Lauderdale, FL 33328, USA
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15
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Anti-Inflammatory Effects of Flavonoids in Common Neurological Disorders Associated with Aging. Int J Mol Sci 2023; 24:ijms24054297. [PMID: 36901731 PMCID: PMC10001833 DOI: 10.3390/ijms24054297] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 02/08/2023] [Accepted: 02/15/2023] [Indexed: 02/24/2023] Open
Abstract
Aging reduces homeostasis and contributes to increasing the risk of brain diseases and death. Some of the principal characteristics are chronic and low-grade inflammation, a general increase in the secretion of proinflammatory cytokines, and inflammatory markers. Aging-related diseases include focal ischemic stroke and neurodegenerative diseases such as Alzheimer's disease (AD) and Parkinson's disease (PD). Flavonoids are the most common class of polyphenols and are abundantly found in plant-based foods and beverages. A small group of individual flavonoid molecules (e.g., quercetin, epigallocatechin-3-gallate, and myricetin) has been used to explore the anti-inflammatory effect in vitro studies and in animal models of focal ischemic stroke and AD and PD, and the results show that these molecules reduce the activated neuroglia and several proinflammatory cytokines, and also, inactivate inflammation and inflammasome-related transcription factors. However, the evidence from human studies has been limited. In this review article, we highlight the evidence that individual natural molecules can modulate neuroinflammation in diverse studies from in vitro to animal models to clinical studies of focal ischemic stroke and AD and PD, and we discuss future areas of research that can help researchers to develop new therapeutic agents.
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16
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Shaikh A, Ahmad F, Teoh SL, Kumar J, Yahaya MF. Honey and Alzheimer's Disease-Current Understanding and Future Prospects. Antioxidants (Basel) 2023; 12:antiox12020427. [PMID: 36829985 PMCID: PMC9952506 DOI: 10.3390/antiox12020427] [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: 12/30/2022] [Revised: 01/30/2023] [Accepted: 02/03/2023] [Indexed: 02/12/2023] Open
Abstract
Alzheimer's disease (AD), a leading cause of dementia, has been a global concern. AD is associated with the involvement of the central nervous system that causes the characteristic impaired memory, cognitive deficits, and behavioral abnormalities. These abnormalities caused by AD is known to be attributed by extracellular aggregates of amyloid beta plaques and intracellular neurofibrillary tangles. Additionally, genetic factors such as abnormality in the expression of APOE, APP, BACE1, PSEN-1, and PSEN-2 play a role in the disease. As the current treatment aims to treat the symptoms and to slow the disease progression, there has been a continuous search for new nutraceutical agent or medicine to help prevent and cure AD pathology. In this quest, honey has emerged as a powerful nootropic agent. Numerous studies have demonstrated that the high flavonoids and phenolic acids content in honey exerts its antioxidant, anti-inflammatory, and neuroprotective properties. This review summarizes the effect of main flavonoid compounds found in honey on the physiological functioning of the central nervous system, and the effect of honey intake on memory and cognition in various animal model. This review provides a new insight on the potential of honey to prevent AD pathology, as well as to ameliorate the damage in the developed AD.
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Affiliation(s)
- Ammara Shaikh
- Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | - Fairus Ahmad
- Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | - Seong Lin Teoh
- Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | - Jaya Kumar
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | - Mohamad Fairuz Yahaya
- Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
- Correspondence:
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17
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Tziastoudi M, Cholevas C, Stefanidis I, Theoharides TC. Genetics of COVID-19 and myalgic encephalomyelitis/chronic fatigue syndrome: a systematic review. Ann Clin Transl Neurol 2022; 9:1838-1857. [PMID: 36204816 PMCID: PMC9639636 DOI: 10.1002/acn3.51631] [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: 04/27/2022] [Revised: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 01/08/2023] Open
Abstract
COVID‐19 and ME/CFS present with some similar symptoms, especially physical and mental fatigue. In order to understand the basis of these similarities and the possibility of underlying common genetic components, we performed a systematic review of all published genetic association and cohort studies regarding COVID‐19 and ME/CFS and extracted the genes along with the genetic variants investigated. We then performed gene ontology and pathway analysis of those genes that gave significant results in the individual studies to yield functional annotations of the studied genes using protein analysis through evolutionary relationships (PANTHER) VERSION 17.0 software. Finally, we identified the common genetic components of these two conditions. Seventy‐one studies for COVID‐19 and 26 studies for ME/CFS were included in the systematic review in which the expression of 97 genes for COVID‐19 and 429 genes for ME/CFS were significantly affected. We found that ACE, HLA‐A, HLA‐C, HLA‐DQA1, HLA‐DRB1, and TYK2 are the common genes that gave significant results. The findings of the pathway analysis highlight the contribution of inflammation mediated by chemokine and cytokine signaling pathways, and the T cell activation and Toll receptor signaling pathways. Protein class analysis revealed the contribution of defense/immunity proteins, as well as protein‐modifying enzymes. Our results suggest that the pathogenesis of both syndromes could involve some immune dysfunction.
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Affiliation(s)
- Maria Tziastoudi
- Department of Nephrology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Christos Cholevas
- First Department of Ophthalmology, Faculty of Health Sciences, Aristotle University, AHEPA Hospital, Thessaloniki, Greece
| | - Ioannis Stefanidis
- Department of Nephrology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Theoharis C Theoharides
- Institute of Neuro-Immune Medicine, Nova Southeastern University, Clearwater, FL, USA.,Laboratory of Molecular Immunopharmacology and Drug Discovery, Department of Immunology, Tufts University School of Medicine, Boston, Massachusetts, USA.,School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts, USA.,Departments of Internal Medicine and Psychiatry, Tufts University School of Medicine and Tufts Medical Center, Boston, Massachusetts, USA
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18
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Baier A, Szyszka R. CK2 and protein kinases of the CK1 superfamily as targets for neurodegenerative disorders. Front Mol Biosci 2022; 9:916063. [PMID: 36275622 PMCID: PMC9582958 DOI: 10.3389/fmolb.2022.916063] [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: 04/08/2022] [Accepted: 08/02/2022] [Indexed: 11/13/2022] Open
Abstract
Casein kinases are involved in a variety of signaling pathways, and also in inflammation, cancer, and neurological diseases. Therefore, they are regarded as potential therapeutic targets for drug design. Recent studies have highlighted the importance of the casein kinase 1 superfamily as well as protein kinase CK2 in the development of several neurodegenerative pathologies, such as Alzheimer’s disease, Parkinson’s disease, Huntington’s disease, and amyotrophic lateral sclerosis. CK1 kinases and their closely related tau tubulin kinases as well as CK2 are found to be overexpressed in the mammalian brain. Numerous substrates have been detected which play crucial roles in neuronal and synaptic network functions and activities. The development of new substances for the treatment of these pathologies is in high demand. The impact of these kinases in the progress of neurodegenerative disorders, their bona fide substrates, and numerous natural and synthetic compounds which are able to inhibit CK1, TTBK, and CK2 are discussed in this review.
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Affiliation(s)
- Andrea Baier
- *Correspondence: Andrea Baier, ; Ryszard Szyszka,
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19
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Zhang P, Maimaiti Z, Aili G, Yuan F, Xiao H. Vitis vinifera L. Flavones Regulate Hippocampal Neurons via Autophagy in APP/PS1 Alzheimer Model Mice. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2022; 2022:8554184. [PMID: 36091589 PMCID: PMC9458394 DOI: 10.1155/2022/8554184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 08/01/2022] [Accepted: 08/05/2022] [Indexed: 11/17/2022]
Abstract
Background Alzheimer's disease (AD) is a neurodegenerative disease and our current treatment approach can only delay its course rather than cure it completely. Flavones from Vitis vinifera L. have been reported to promote synaptic plasticity and indirectly affect the expression of cholinergic neurotransmitters in a rat model of Alzheimer's disease. Objective The aim of the study is to explore the effect of Vitis vinifera L. in APP/PS1 Alzheimer model mice. Methods APP/PS1 AD mice were used as the research subjects, and the mice were divided into a model group, donepezil group, VTF low-dose group, VTF medium-dose group, and VTF high-dose group. C57BL/6 mice served as a control group. The autophagosomes were observed by a transmission electron microscope, and the expressions of LC3I, LC3IIand Beclin-1 were determined by Western blotting. The results of qRT-PCR are consistent with Western blotting. Results VTF can exert a positive regulatory effect on AD mice by inhibiting autophagy. Conclusion Our study supports that intragastrically administration of VTF is effective and operable in Alzheimer's disease mice, and that inhibition of excessive autophagy may be one of the potential reasons why VTF exerts a therapeutic effect on AD.
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Affiliation(s)
- Peng Zhang
- College of Public Health, Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Znafuguli Maimaiti
- College of Basic Medical, Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Gulixiati Aili
- College of Public Health, Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Fang Yuan
- College of Basic Medical, Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Hui Xiao
- College of Public Health, Xinjiang Medical University, Urumqi, Xinjiang, China
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20
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Flavonoids as Promising Neuroprotectants and Their Therapeutic Potential against Alzheimer’s Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:6038996. [PMID: 36071869 PMCID: PMC9441372 DOI: 10.1155/2022/6038996] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 08/10/2022] [Indexed: 02/08/2023]
Abstract
Alzheimer's disease (AD) is one of the serious and progressive neurodegenerative disorders in the elderly worldwide. Various genetic, environmental, and lifestyle factors are associated with its pathogenesis that affect neuronal cells to degenerate over the period of time. AD is characterized by cognitive dysfunctions, behavioural disability, and psychological impairments due to the accumulation of amyloid beta (Aβ) peptides and neurofibrillary tangles (NFT). Several research reports have shown that flavonoids are the polyphenolic compounds that significantly improve cognitive functions and inhibit or delay the amyloid beta aggregation or NFT formation in AD. Current research has uncovered that dietary use of flavonoid-rich food sources essentially increases intellectual abilities and postpones or hinders the senescence cycle and related neurodegenerative problems including AD. During AD pathogenesis, multiple signalling pathways are involved and to target a single pathway may relieve the symptoms but not provides the permanent cure. Flavonoids communicate with different signalling pathways and adjust their activities, accordingly prompting valuable neuroprotective impacts. Flavonoids likewise hamper the movement of obsessive indications of neurodegenerative disorders by hindering neuronal apoptosis incited by neurotoxic substances. In this short review, we briefly discussed about the classification of flavonoids and their neuroprotective properties that could be used as a potential source for the treatment of AD. In this review, we also highlight the structural features of flavonoids, their beneficial roles in human health, and significance in plants as well as their microbial production.
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21
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Almahayni K, Spiekermann M, Fiore A, Yu G, Pedram K, Möckl L. Small molecule inhibitors of mammalian glycosylation. Matrix Biol Plus 2022; 16:100108. [PMID: 36467541 PMCID: PMC9713294 DOI: 10.1016/j.mbplus.2022.100108] [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: 11/14/2021] [Revised: 02/10/2022] [Accepted: 03/10/2022] [Indexed: 01/06/2023] Open
Abstract
Glycans are one of the fundamental biopolymers encountered in living systems. Compared to polynucleotide and polypeptide biosynthesis, polysaccharide biosynthesis is a uniquely combinatorial process to which interdependent enzymes with seemingly broad specificities contribute. The resulting intracellular cell surface, and secreted glycans play key roles in health and disease, from embryogenesis to cancer progression. The study and modulation of glycans in cell and organismal biology is aided by small molecule inhibitors of the enzymes involved in glycan biosynthesis. In this review, we survey the arsenal of currently available inhibitors, focusing on agents which have been independently validated in diverse systems. We highlight the utility of these inhibitors and drawbacks to their use, emphasizing the need for innovation for basic research as well as for therapeutic applications.
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Affiliation(s)
- Karim Almahayni
- Max Planck Institute for the Science of Light, 91058 Erlangen, Germany
| | - Malte Spiekermann
- Max Planck Institute for the Science of Light, 91058 Erlangen, Germany
| | - Antonio Fiore
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147, USA
| | - Guoqiang Yu
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147, USA
| | - Kayvon Pedram
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147, USA,Corresponding authors.
| | - Leonhard Möckl
- Max Planck Institute for the Science of Light, 91058 Erlangen, Germany,Corresponding authors.
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22
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Gianferrara T, Cescon E, Grieco I, Spalluto G, Federico S. Glycogen Synthase Kinase 3β Involvement in Neuroinflammation and Neurodegenerative Diseases. Curr Med Chem 2022; 29:4631-4697. [PMID: 35170406 DOI: 10.2174/0929867329666220216113517] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 11/24/2021] [Accepted: 12/19/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND GSK-3β activity has been strictly related to neuroinflammation and neurodegeneration. Alzheimer's disease is the most studied neurodegenerative disease, but GSK-3β seems to be involved in almost all neurodegenerative diseases including Parkinson's disease, amyotrophic lateral sclerosis, frontotemporal dementia, Huntington's disease and the autoimmune disease multiple sclerosis. OBJECTIVE The aim of this review is to help researchers both working on this research topic or not to have a comprehensive overview on GSK-3β in the context of neuroinflammation and neurodegeneration. METHOD Literature has been searched using PubMed and SciFinder databases by inserting specific keywords. A total of more than 500 articles have been discussed. RESULTS First of all, the structure and regulation of the kinase were briefly discussed and then, specific GSK-3β implications in neuroinflammation and neurodegenerative diseases were illustrated also with the help of figures, to conclude with a comprehensive overview on the most important GSK-3β and multitarget inhibitors. For all discussed compounds, the structure and IC50 values at the target kinase have been reported. CONCLUSION GSK-3β is involved in several signaling pathways both in neurons as well as in glial cells and immune cells. The fine regulation and interconnection of all these pathways are at the base of the rationale use of GSK-3β inhibitors in neuroinflammation and neurodegeneration. In fact, some compounds are now under clinical trials. Despite this, pharmacodynamic and ADME/Tox profiles of the compounds were often not fully characterized and this is deleterious in such a complex system.
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Affiliation(s)
- Teresa Gianferrara
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Eleonora Cescon
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Ilenia Grieco
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Giampiero Spalluto
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Stephanie Federico
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
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23
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Tana, Nakagawa T. Luteolin ameliorates depression-like behaviors by suppressing ER stress in a mouse model of Alzheimer's disease. Biochem Biophys Res Commun 2022; 588:168-174. [PMID: 34959189 DOI: 10.1016/j.bbrc.2021.12.074] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 12/20/2021] [Indexed: 12/13/2022]
Abstract
Alzheimer's disease (AD) is the most common cause of dementia in the elderly population. Inflammation plays an important role in AD, as microglia respond to several pathological insults, such as Aβ, and exert protective homeostatic functions (anti-inflammatory) and detrimental inflammatory functions (proinflammatory). During the development of AD, chronic inflammation that accompanies aging causes microglial priming, a state of hyperactivation in response to stimulation, indicating that suppressing microglial priming may be a therapeutic intervention for AD. Endoplasmic reticulum (ER) stress is crucial for inflammation through NF-kB and inflammasome activation. To identify natural flavonoids that regulate ER stress, a DNA microarray was performed using the brains of AD model mice after long-term intake of quercetin, after which the connectivity map (CMap) assay was carried out. We found that luteolin suppresses lipopolysaccharide (LPS)-induced interleukin 1β (IL1β) expression by inhibiting ER stress. Immunohistochemical analyses showed that CD68 levels were reduced in the brain after intraperitoneal injection of luteolin in a mouse model of AD, suppressing IL1β production. As shown by behavioral analyses using the tail suspension test (TST) and forced swimming test (FST), depression-like behaviors were ameliorated in luteolin-treated AD model mice. These findings indicate that luteolin prevents ER stress to suppress microglial activation in the brain, improving individual activity.
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Affiliation(s)
- Tana
- Department of Neurobiology, Gifu University Graduate School of Medicine, Gifu, 501-1194, Japan
| | - Toshiyuki Nakagawa
- Department of Neurobiology, Gifu University Graduate School of Medicine, Gifu, 501-1194, Japan.
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24
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Theoharides TC. Could SARS-CoV-2 Spike Protein Be Responsible for Long-COVID Syndrome? Mol Neurobiol 2022; 59:1850-1861. [PMID: 35028901 PMCID: PMC8757925 DOI: 10.1007/s12035-021-02696-0] [Citation(s) in RCA: 72] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 12/10/2021] [Indexed: 02/06/2023]
Abstract
SARS-CoV-2 infects cells via its spike protein binding to its surface receptor on target cells and results in acute symptoms involving especially the lungs known as COVID-19. However, increasing evidence indicates that many patients develop a chronic condition characterized by fatigue and neuropsychiatric symptoms, termed long-COVID. Most of the vaccines produced so far for COVID-19 direct mammalian cells via either mRNA or an adenovirus vector to express the spike protein, or administer recombinant spike protein, which is recognized by the immune system leading to the production of neutralizing antibodies. Recent publications provide new findings that may help decipher the pathogenesis of long-COVID. One paper reported perivascular inflammation in brains of deceased patients with COVID-19, while others showed that the spike protein could damage the endothelium in an animal model, that it could disrupt an in vitro model of the blood-brain barrier (BBB), and that it can cross the BBB resulting in perivascular inflammation. Moreover, the spike protein appears to share antigenic epitopes with human molecular chaperons resulting in autoimmunity and can activate toll-like receptors (TLRs), leading to release of inflammatory cytokines. Moreover, some antibodies produced against the spike protein may not be neutralizing, but may change its conformation rendering it more likely to bind to its receptor. As a result, one wonders whether the spike protein entering the brain or being expressed by brain cells could activate microglia, alone or together with inflammatory cytokines, since protective antibodies could not cross the BBB, leading to neuro-inflammation and contributing to long-COVID. Hence, there is urgent need to better understand the neurotoxic effects of the spike protein and to consider possible interventions to mitigate spike protein-related detrimental effects to the brain, possibly via use of small natural molecules, especially the flavonoids luteolin and quercetin.
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Affiliation(s)
- Theoharis C Theoharides
- Laboratory of Molecular Immunopharmacology and Drug Discovery, Department of Immunology, Tufts University School of Medicine, 136 Harrison Avenue, Suite 304, Boston, MA, 02111, USA.
- School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, MA, 02111, USA.
- Departments of Internal Medicine and Psychiatry, Tufts University School of Medicine and Tufts Medical Center, Boston, MA, 02111, USA.
- Institute of Neuro-Immune Medicine, Nova Southeastern University, Clearwater, FL, 33759, USA.
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Habib CN, Mohamed MR, Tadros MG, Tolba MF, Menze ET, Masoud SI. The potential neuroprotective effect of diosmin in rotenone-induced model of Parkinson's disease in rats. Eur J Pharmacol 2022; 914:174573. [PMID: 34656609 DOI: 10.1016/j.ejphar.2021.174573] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 12/21/2022]
Abstract
Most treatments for Parkinson's disease (PD) focus on improving the symptoms and the dopaminergic effects; nevertheless, they cannot delay the disease progression. Diosmin (DM), a naturally occurring flavone that is obtained from citrus fruits, has demonstrated anti-apoptotic, anti-inflammatory and antioxidative properties in many diseases. This study aimed to assess the neuroprotective effects of diosmin in rotenone-induced rat model of PD and investigate its potential underlying mechanisms. A preliminary dose-response study was conducted where rats were treated with DM (50,100 and 200 mg/kg, p.o.) concomitantly with rotenone (2 mg/kg, s.c.) for 4 weeks. Catalepsy, motor impairment, spontaneous locomotion, body weight, histological examination and tyrosine hydroxylase (TH) immunoreactivity were evaluated in both the midbrains and striata of rats. Treatment with DM (200 mg/kg) showed the most promising outcome therefore, it was selected for further evaluation of α-synuclein, Bax, Bcl2, nuclear factor kappa B (NF-кB), nuclear factor erythroid 2- related factor 2 (Nrf2), and heme oxygenase-1 (HO-1), in addition to biochemical analysis of tumor necrosis factor-α (TNF-α). Results showed that DM (200 mg/kg, p.o.) prevented rotenone-induced motor impairment, weight reduction and histological damage. Furthermore, it significantly inhibited rotenone-induced decrease in TH expression. These results were correlated with reduction in α-synuclein immunoreactivity, together with improvement of Bax/Bcl2 ratio compared to rotenone group. DM also attenuated rotenone-induced increase in NF-кB expression as well as TNF- α levels. Moreover, DM inhibited rotenone-induced upregulation of Nrf2/HO-1 pathway. Thus, the current study suggests that DM might be a promising candidate for managing the neuropathological course of PD.
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Affiliation(s)
- Christine N Habib
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Cairo, 11566, Egypt.
| | - Mohamed R Mohamed
- Department of Biochemistry, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Mariane G Tadros
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Cairo, 11566, Egypt
| | - Mai F Tolba
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Cairo, 11566, Egypt; School of Life and Medical Sciences, University of Hertfordshire Hosted by Global Academic Foundation, New Administrative Capital, Egypt
| | - Esther T Menze
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Cairo, 11566, Egypt
| | - Somia I Masoud
- Department of Clinical Pharmacology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
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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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Alì S, Davinelli S, Accardi G, Aiello A, Caruso C, Duro G, Ligotti ME, Pojero F, Scapagnini G, Candore G. Healthy ageing and Mediterranean diet: A focus on hormetic phytochemicals. Mech Ageing Dev 2021; 200:111592. [PMID: 34710375 DOI: 10.1016/j.mad.2021.111592] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 10/06/2021] [Accepted: 10/22/2021] [Indexed: 12/15/2022]
Abstract
Mediterranean diet (MedDiet) is rich in fruits and vegetables associated with longevity and a reduced risk of several age-related diseases. It is demonstrated that phytochemicals in these plant products enhance the positive effects of MedDiet by acting on the inflammatory state and reducing oxidative stress. Evidence support that these natural compounds act as hormetins, triggering one or more adaptive stress-response pathways at low doses. Activated stress-response pathways increase the expression of cytoprotective proteins and multiple genes that act as lifespan regulators, essential for the ageing process. In these ways, the hormetic response by phytochemicals such as resveratrol, ferulic acid, and several others in MedDiet might enhance cells' ability to cope with more severe challenges, resist diseases, and promote longevity. This review discusses the role of MedDiet phytochemicals in healthy ageing and the prevention of age-related diseases.
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Affiliation(s)
- Sawan Alì
- Department of Medicine and Health Sciences "V. Tiberio", University of Molise, Campobasso, Italy
| | - Sergio Davinelli
- Department of Medicine and Health Sciences "V. Tiberio", University of Molise, Campobasso, Italy
| | - Giulia Accardi
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, Italy
| | - Anna Aiello
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, Italy
| | - Calogero Caruso
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, Italy.
| | - Giovanni Duro
- Institute for Research and Biomedical Innovation, National Research Council, Palermo, Italy
| | - Mattia Emanuela Ligotti
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, Italy; Institute for Research and Biomedical Innovation, National Research Council, Palermo, Italy
| | - Fanny Pojero
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, Italy
| | - Giovanni Scapagnini
- Department of Medicine and Health Sciences "V. Tiberio", University of Molise, Campobasso, Italy
| | - Giuseppina Candore
- Laboratory of Immunopathology and Immunosenescence, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, Italy
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Wang Q, Dong X, Zhang R, Zhao C. Flavonoids with Potential Anti-Amyloidogenic Effects as Therapeutic Drugs for Treating Alzheimer's Disease. J Alzheimers Dis 2021; 84:505-533. [PMID: 34569961 DOI: 10.3233/jad-210735] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Alzheimer's disease (AD) is a central neurodegenerative disease generally among the elderly; it accounts for approximately 50-75%of total cases of dementia patients and poses a serious threat to physical and mental health. Currently available treatments for AD mainly relieves its symptoms, and effective therapy is urgently needed. Deposition of amyloid-β protein in the brain is an early and invariant neuropathological feature of AD. Currently the main efforts in developing anti-AD drugs focus on anti-amyloidogenic therapeutics that prevent amyloid-β production or aggregation and decrease the occurrence of neurotoxic events. The results of an increasing number of studies suggest that natural extracts and phytochemicals have a positive impact on brain aging. Flavonoids belong to the broad group of polyphenols and recent data indicate a favorable effect of flavonoids on brain aging. In this review, we collect relevant discoveries from 1999 to 2021, discuss 75 flavonoids that effectively influence AD pathogenesis, and summarize their functional mechanisms in detail. The data we have reviewed show that, these flavonoids belong to various subclasses, including flavone, flavanone, biflavone, etc. Our results provide a reference for further study of the effects of flavonoids on AD and the progress of anti-AD therapy.
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Affiliation(s)
- Qixin Wang
- Gene Engineering and Biotechnology Beijing Key Laboratory, College of Life Science, Beijing Normal University, Beijing, China
| | - Xiaofang Dong
- Gene Engineering and Biotechnology Beijing Key Laboratory, College of Life Science, Beijing Normal University, Beijing, China
| | - Ran Zhang
- Gene Engineering and Biotechnology Beijing Key Laboratory, College of Life Science, Beijing Normal University, Beijing, China
| | - Changqi Zhao
- Gene Engineering and Biotechnology Beijing Key Laboratory, College of Life Science, Beijing Normal University, Beijing, China
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Theoharides TC. Ways to Address Perinatal Mast Cell Activation and Focal Brain Inflammation, including Response to SARS-CoV-2, in Autism Spectrum Disorder. J Pers Med 2021; 11:860. [PMID: 34575637 PMCID: PMC8465360 DOI: 10.3390/jpm11090860] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 08/23/2021] [Accepted: 08/24/2021] [Indexed: 01/08/2023] Open
Abstract
The prevalence of autism spectrum disorder (ASD) continues to increase, but no distinct pathogenesis or effective treatment are known yet. The presence of many comorbidities further complicates matters, making a personalized approach necessary. An increasing number of reports indicate that inflammation of the brain leads to neurodegenerative changes, especially during perinatal life, "short-circuiting the electrical system" in the amygdala that is essential for our ability to feel emotions, but also regulates fear. Inflammation of the brain can result from the stimulation of mast cells-found in all tissues including the brain-by neuropeptides, stress, toxins, and viruses such as SARS-CoV-2, leading to the activation of microglia. These resident brain defenders then release even more inflammatory molecules and stop "pruning" nerve connections, disrupting neuronal connectivity, lowering the fear threshold, and derailing the expression of emotions, as seen in ASD. Many epidemiological studies have reported a strong association between ASD and atopic dermatitis (eczema), asthma, and food allergies/intolerance, all of which involve activated mast cells. Mast cells can be triggered by allergens, neuropeptides, stress, and toxins, leading to disruption of the blood-brain barrier (BBB) and activation of microglia. Moreover, many epidemiological studies have reported a strong association between stress and atopic dermatitis (eczema) during gestation, which involves activated mast cells. Both mast cells and microglia can also be activated by SARS-CoV-2 in affected mothers during pregnancy. We showed increased expression of the proinflammatory cytokine IL-18 and its receptor, but decreased expression of the anti-inflammatory cytokine IL-38 and its receptor IL-36R, only in the amygdala of deceased children with ASD. We further showed that the natural flavonoid luteolin is a potent inhibitor of the activation of both mast cells and microglia, but also blocks SARS-CoV-2 binding to its receptor angiotensin-converting enzyme 2 (ACE2). A treatment approach should be tailored to each individual patient and should address hyperactivity/stress, allergies, or food intolerance, with the introduction of natural molecules or drugs to inhibit mast cells and microglia, such as liposomal luteolin.
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Affiliation(s)
- Theoharis C. Theoharides
- Laboratory of Molecular Immunopharmacology and Drug Discovery, Department of Immunology, Tufts University School of Medicine, 136 Harrison Avenue, Suite 304, Boston, MA 02111, USA; ; Tel.: +1-(617)-636-6866; Fax: +1-(617)-636-2456
- School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, MA 02111, USA
- Department of Internal Medicine, Tufts University School of Medicine and Tufts Medical Center, Boston, MA 02111, USA
- Department of Psychiatry, Tufts University School of Medicine and Tufts Medical Center, Boston, MA 02111, USA
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30
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Fahmy A, Abuelenain GL, Rasheed N, Abdou A. 'de Novo' repurposing of Daflon as anti-intestinal parasitic drug in experimental giardiasis. Exp Parasitol 2021; 226-227:108124. [PMID: 34139241 DOI: 10.1016/j.exppara.2021.108124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 04/19/2021] [Accepted: 06/07/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND There is a necessity to develop or discover an alternative drug to combat the drug resistance by Giardia duodenalis and minimize the multiple doses and frequency of the conventional drug administration. Progressive repositioning or 'repurposing' of drugs has become widespread due to economic circumstances and medical emergency needs. Daflon 500 mg (DFL) is a natural product used safely as a nutrient supplement and an antidiabetic drug in many European countries and the US. OBJECTIVE This study aimed at investigating the efficiency of DFL, in vivo, in a murine model as a safe alternative or co-drug for giardiasis. MATERIALS AND METHODS Swiss Albino mice (n = 32) were inoculated with 1X104Giardia cysts and assigned to four groups: One group was the infected non-treated control mice and three experimental groups that were treated differently, either with Metronidazole (MTZ), DFL, or combined therapy of DFL/MTZ. Also, eight normal mice served as a control group. All mice were sacrificed 13 days post-infection for the parasitic, histopathological, and oxidative stress analysis. RESULTS MTZ, DFL, and the combined therapy significantly reduced the number of trophozoites and cysts compared to their counterparts of the infected mice. The histopathological analysis of the small intestines of the mice treated with the combined therapy retained typical intestinal architecture and normal levels of malondialdehyde (MDA), superoxide dismutase (SOD), and glutathione. CONCLUSION This study indicated promising actions of Daflon 500 as an anti-giardial drug, and the results demonstrated its potential effect in improving the intestinal epithelial tissue and disturbing the Giardia stages when it was taken collectively with Metronidazole.
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Affiliation(s)
- Azza Fahmy
- Parasitology Lab, Department of Immunology and Drug Evaluation, Theodor Bilharz Research Institute, Imbaba, Egypt
| | - Gehan Labib Abuelenain
- Parasitology Lab, Department of Immunology and Drug Evaluation, Theodor Bilharz Research Institute, Imbaba, Egypt.
| | | | - Amr Abdou
- Microbiology and Immunology Department, NRC, Giza, Egypt
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31
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Zwart SR, Mulavara AP, Williams TJ, George K, Smith SM. The role of nutrition in space exploration: Implications for sensorimotor, cognition, behavior and the cerebral changes due to the exposure to radiation, altered gravity, and isolation/confinement hazards of spaceflight. Neurosci Biobehav Rev 2021; 127:307-331. [PMID: 33915203 DOI: 10.1016/j.neubiorev.2021.04.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 02/16/2021] [Accepted: 04/23/2021] [Indexed: 12/19/2022]
Abstract
Multi-year crewed space exploration missions are now on the horizon; therefore, it is important that we understand and mitigate the physiological effects of spaceflight. The spaceflight hazards-radiation, isolation, confinement, and altered gravity-have the potential to contribute to neuroinflammation and produce long-term cognitive and behavioral effects-while the fifth hazard, distance from earth, limits capabilities to mitigate these risks. Accumulated evidence suggests that nutrition has an important role in optimizing cognition and reducing the risk of neurodegenerative diseases caused by neuroinflammation. Here we review the nutritional perspective of how these spaceflight hazards affect the astronaut's brain, behavior, performance, and sensorimotor function. We also assess potential nutrient/nutritional countermeasures that could prevent or mitigate spaceflight risks and ensure that crewmembers remain healthy and perform well during their missions. Just as history has taught us the importance of nutrition in terrestrial exploration, we must understand the role of nutrition in the development and mitigation of spaceflight risks before humans can successfully explore beyond low-Earth orbit.
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Affiliation(s)
- Sara R Zwart
- Univerity of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555, USA.
| | | | - Thomas J Williams
- NASA Johnson Space Center, Mail Code SK3, 2101 NASA Parkway, Houston, TX, 77058, USA
| | - Kerry George
- KBR, 2400 E NASA Parkway, Houston, TX, 77058, USA
| | - Scott M Smith
- NASA Johnson Space Center, Mail Code SK3, 2101 NASA Parkway, Houston, TX, 77058, USA
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32
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Varshney H, Siddique YH. Role of natural plant products against Alzheimer's disease. CNS & NEUROLOGICAL DISORDERS-DRUG TARGETS 2021; 20:904-941. [PMID: 33881973 DOI: 10.2174/1871527320666210420135437] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 12/12/2020] [Accepted: 02/09/2021] [Indexed: 01/25/2023]
Abstract
Alzheimer's disease (AD) is one of the major neurodegenerative disorder. Deposition of amyloid fibrils and tau protein are associated with various pathological symptoms. Currently limited medication is available for AD treatment. Most of the drugs are basically cholinesterase inhibitors and associated with various side effects. Natural plant products have shown potential as a therapeutic agent for the treatment of AD symptoms. Variety of secondary metabolites like flavonoids, tannins, terpenoids, alkaloids and phenols are used to reduce the progression of the disease. Plant products have less or no side effect and are easily available. The present review gives a detailed account of the potential of natural plant products against the AD symptoms.
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Affiliation(s)
- Himanshi Varshney
- Drosophila Transgenic Laboratory, Section of Genetics, Department of Zoology, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, Uttar Pradesh, India
| | - Yasir Hasan Siddique
- Drosophila Transgenic Laboratory, Section of Genetics, Department of Zoology, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, Uttar Pradesh, India
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33
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David IG, Oancea AG, Buleandră M, Popa DE, Iorgulescu EE, Ciobanu AM. Disposable Pencil Graphite Electrode for Diosmin Voltammetric Analysis. MICROMACHINES 2021; 12:mi12040351. [PMID: 33805861 PMCID: PMC8064319 DOI: 10.3390/mi12040351] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/20/2021] [Accepted: 03/23/2021] [Indexed: 01/24/2023]
Abstract
Diosmin (DIO) is a naturally occurring flavonoid with multiple beneficial effects on human health. The presence of different hydroxyl groups in diosmin structure enables its electrochemical investigation and quantification. This work presents, for the first time, diosmin voltammetric behavior and quantification on the cost-effective, disposable pencil graphite electrode (PGE). Diosmin oxidation on PGE involves two irreversible steps, generating products with reversible redox behaviors. All electrode processes are pH-dependent and predominantly adsorption-controlled. Differential pulse (DPV) and adsorptive stripping differential pulse (AdSDPV) voltammetric methods have been optimized for diosmin quantification o an H-type PGE, in 0.100 mol/L H2SO4. The linear ranges and limits of detection were for DPV 1.00 × 10-6-1.00 × 10-5 mol/L and 2.76 × 10-7 mol/L DIO for DPV and 1.00 × 10-7-2.50 × 10-6 mol/L and 7.42 × 10-8 mol/L DIO for AdSDPV, respectively. The DPV method was successfully applied for diosmin quantification in dietary supplement tablets. The percentage recovery was 99.87 ± 4.88%.
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Affiliation(s)
- Iulia Gabriela David
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, Panduri Av. 90-92, District 5, 050663 Bucharest, Romania; (A.-G.O.); (D.E.P.); (E.E.I.)
- Correspondence: (I.G.D.); (M.B.)
| | - Alexandra-Gabriela Oancea
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, Panduri Av. 90-92, District 5, 050663 Bucharest, Romania; (A.-G.O.); (D.E.P.); (E.E.I.)
| | - Mihaela Buleandră
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, Panduri Av. 90-92, District 5, 050663 Bucharest, Romania; (A.-G.O.); (D.E.P.); (E.E.I.)
- Correspondence: (I.G.D.); (M.B.)
| | - Dana Elena Popa
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, Panduri Av. 90-92, District 5, 050663 Bucharest, Romania; (A.-G.O.); (D.E.P.); (E.E.I.)
| | - Emilia Elena Iorgulescu
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, Panduri Av. 90-92, District 5, 050663 Bucharest, Romania; (A.-G.O.); (D.E.P.); (E.E.I.)
| | - Adela Magdalena Ciobanu
- Discipline of Psychiatry, Neurosciences Department, Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy, Dionisie Lupu Street 37, 020021 Bucharest, Romania;
- Department of Psychiatry “Prof. Alexandru Obregia” Clinical Psychiatric Hospital, Berceni Av. 10, 041914 Bucharest, Romania
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Daily JW, Kang S, Park S. Protection against Alzheimer's disease by luteolin: Role of brain glucose regulation, anti-inflammatory activity, and the gut microbiota-liver-brain axis. Biofactors 2021; 47:218-231. [PMID: 33347668 DOI: 10.1002/biof.1703] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 12/03/2020] [Indexed: 12/26/2022]
Abstract
Luteolin is a widely distributed flavone herbs and vegetables. It has anti-oxidant and anti-inflammatory activities and improves glucose metabolism by potentiating insulin sensitivity and improving β-cell function and mass. Alzheimer's disease (AD) is induced by the deposition of amyloid-beta (Aβ) in the hippocampus and the formation of neurotoxic Aβ plaques. The Aβ deposition is associated with increased formation of Aβ from amyloid precursor protein by up-regulation of β-secretase and β-site amyloid precursor protein-cleaving enzyme 1 (BACE1). Furthermore, Aβ accumulation is increased by brain insulin resistance. The impairment of insulin/IGF-1 signaling mainly in the hippocampus and brain insulin resistance is connected to signals originating in the liver and gut microbiota, known as the gut microbiota-liver-brain axis. This indicates that the changes in the production of short-chain fatty acids by the gut microbiota and pro-inflammatory cytokines can alter insulin resistance in the liver and brain. Luteolin is detected in the brain tissues after passing through the blood-brain barrier, where it can directly influence neuroinflammation and brain insulin resistance and modulate Aβ deposition. Luteolin (10-70 mg/kg bw for rodents) can modulate the systemic and brain insulin resistance, and it suppresses AD development directly, and it influences Aβ deposition by activation of the gut microbiota-liver-brain axis. In this review, we evaluate the potential of luteolin to mitigate two potential causes of AD, neuroinflammatory processes, and disruption of glucose metabolism in the brain. This review suggests that luteolin intake can enhance brain insulin resistance and neuroinflammation, directly and indirectly, to protect against the development of Alzheimer's-like disease, and the gut microbiota-liver-brain axis is mainly involved in the indirect pathway. However, most studies have been conducted in animal studies, and human clinical trials are needed.
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Affiliation(s)
- James W Daily
- Department of R&D, Daily Manufacturing Inc, Rockwell, North Carolina, USA
| | - Suna Kang
- Department of Food and Nutrition, Obesity/Diabetes Research Center, Hoseo University, Asan, South Korea
| | - Sunmin Park
- Department of Food and Nutrition, Obesity/Diabetes Research Center, Hoseo University, Asan, South Korea
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Theoharides TC, Cholevas C, Polyzoidis K, Politis A. Long-COVID syndrome-associated brain fog and chemofog: Luteolin to the rescue. Biofactors 2021; 47:232-241. [PMID: 33847020 PMCID: PMC8250989 DOI: 10.1002/biof.1726] [Citation(s) in RCA: 106] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 03/01/2021] [Indexed: 01/08/2023]
Abstract
COVID-19 leads to severe respiratory problems, but also to long-COVID syndrome associated primarily with cognitive dysfunction and fatigue. Long-COVID syndrome symptoms, especially brain fog, are similar to those experienced by patients undertaking or following chemotherapy for cancer (chemofog or chemobrain), as well in patients with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) or mast cell activation syndrome (MCAS). The pathogenesis of brain fog in these illnesses is presently unknown but may involve neuroinflammation via mast cells stimulated by pathogenic and stress stimuli to release mediators that activate microglia and lead to inflammation in the hypothalamus. These processes could be mitigated by phytosomal formulation (in olive pomace oil) of the natural flavonoid luteolin.
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Affiliation(s)
- Theoharis C. Theoharides
- Laboratory of Molecular Immunopharmacology and Drug Discovery, Department of ImmunologyTufts University School of MedicineBostonMassachusettsUSA
- School of Graduate Biomedical SciencesTufts University School of MedicineBostonMassachusettsUSA
- Department of Internal MedicineTufts University School of Medicine and Tufts Medical CenterBostonMassachusettsUSA
- Department of PsychiatryTufts University School of Medicine and Tufts Medical CenterBostonMassachusettsUSA
- BrainGateThessalonikiGreece
| | | | | | - Antonios Politis
- First Department of PsychiatryEginition Hospital, National and Kapodistrian UniversityAthensGreece
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Prasanna P, Upadhyay A. Flavonoid-Based Nanomedicines in Alzheimer's Disease Therapeutics: Promises Made, a Long Way To Go. ACS Pharmacol Transl Sci 2021; 4:74-95. [PMID: 33615162 PMCID: PMC7887745 DOI: 10.1021/acsptsci.0c00224] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Indexed: 12/11/2022]
Abstract
Alzheimer's disease (AD) is characterized by the continuous decline of the cognitive abilities manifested due to the accumulation of large aggregates of amyloid-beta 42 (Aβ42), the formation of neurofibrillary tangles of hyper-phosphorylated forms of microtubule-associated tau protein, which may lead to many alterations at the cellular and systemic level. The current therapeutic strategies primarily focus on alleviating pathological symptoms rather than providing a possible cure. AD is one of the highly studied but least understood neurological problems and remains an unresolved condition of human brain degeneration. Over the years, multiple naturally derived small molecules, including plant products, microbial isolates, and some metabolic byproducts, have been projected as supplements reducing the risk or possible treatment of the disease. However, unfortunately, none has met the expected success. One major challenge for most medications is their ability to cross the blood-brain barrier (BBB). In past decades, nanotechnology-based interventions have offered an alternative platform to address the problem of the successful delivery of the drugs to the specific targets. Interestingly, the exciting interface of natural products and nanomedicine is delivering promising results in AD treatment. The potential applications of flavonoids, the plant-derived compounds best known for their antioxidant activities, and their amalgamation with nanomedicinal approaches may lead to highly effective therapeutic strategies for treating well-known neurodegenerative diseases. In the present review, we explore the possibilities and recent developments on an exciting combination of flavonoids and nanoparticles in AD.
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Affiliation(s)
- Pragya Prasanna
- Department
of Biotechnology, National Institute of
Pharmaceutical Education and Research, Hajipur, Bihar, India 844102
| | - Arun Upadhyay
- Department
of Biochemistry, School of Life Sciences, Central University of Rajasthan, Bandar Sindari, Kishangarh Ajmer, Rajasthan, India 305817
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Chou CH, Hsu KC, Lin TE, Yang CR. Anti-Inflammatory and Tau Phosphorylation-Inhibitory Effects of Eupatin. Molecules 2020; 25:E5652. [PMID: 33266202 PMCID: PMC7731404 DOI: 10.3390/molecules25235652] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 11/26/2020] [Accepted: 11/28/2020] [Indexed: 11/25/2022] Open
Abstract
Alzheimer's disease (AD), which is among the most prevalent neurodegenerative diseases, manifests as increasing memory loss and cognitive decline. Tau phosphorylation and aggregation are strongly linked to neurodegeneration, as well as associated with chronic neuroinflammatory processes. The anti-inflammation effects of natural products have led to wide recognition of their potential for use in treating and preventing AD. This study investigated whether eupatin, a polymethoxyflavonoid found in Artemisia species, has inhibitory effects on neuroinflammation and tau phosphorylation. We treated mouse macrophages and microglia cells with lipopolysaccharides (LPSs) to activate inflammatory signals, and we treated neuronal cells with a protein phosphatase 2A inhibitor, okadaic acid (OA), or transfection with pRK5-EGFP-Tau P301L plasmid to induce tau phosphorylation. The results indicated that eupatin significantly reduced the LPS-induced protein expression and phosphorylation of p65 and inducible nitric oxide synthase as well as downstream products interleukin 6 and nitrite, respectively. Furthermore, eupatin markedly inhibited the expression of phospho-tau in response to OA treatment and plasmid transfection. We discovered that this inhibition was achieved through the inhibition of glycogen synthase kinase 3β (GSK3β), and molecular docking results suggested that eupatin can sufficiently bind to the GSK3β active site. Our results demonstrate that eupatin has neuroprotective effects, making it suitable for AD treatment.
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Affiliation(s)
- Ching-Hsuan Chou
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei 10050, Taiwan;
| | - Kai-Cheng Hsu
- Graduate Institute of Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei 11031, Taiwan; (K.-C.H.); (T.E.L.)
- Ph.D. Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei 11031, Taiwan
- Ph.D. Program in Biotechnology Research and Development, College of Pharmacy, Taipei Medical University, Taipei 11031, Taiwan
- Biomedical Commercialization Center, Taipei Medical University, Taipei 11031, Taiwan
| | - Tony Eight Lin
- Graduate Institute of Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei 11031, Taiwan; (K.-C.H.); (T.E.L.)
- Master Program in Graduate Institute of Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei 11031, Taiwan
| | - Chia-Ron Yang
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei 10050, Taiwan;
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Akasaka-Manya K, Manya H. The Role of APP O-Glycosylation in Alzheimer's Disease. Biomolecules 2020; 10:biom10111569. [PMID: 33218200 PMCID: PMC7699271 DOI: 10.3390/biom10111569] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 11/16/2020] [Accepted: 11/16/2020] [Indexed: 12/13/2022] Open
Abstract
The number of people with dementia is increasing rapidly due to the increase in the aging population. Alzheimer’s disease (AD) is a type of neurodegenerative dementia caused by the accumulation of abnormal proteins. Genetic mutations, smoking, and several other factors have been reported as causes of AD, but alterations in glycans have recently been demonstrated to play a role in AD. Amyloid-β (Aβ), a cleaved fragment of APP, is the source of senile plaque, a pathological feature of AD. APP has been reported to undergo N- and O-glycosylation, and several Polypeptide N-acetylgalactosaminyltransferases (ppGalNAc-Ts) have been shown to have catalytic activity for the transfer of GalNAc to APP. Since O-glycosylation in the proximity of a cleavage site in many proteins has been reported to be involved in protein processing, O-glycans may affect the cleavage of APP during the Aβ production process. In this report, we describe new findings on the O-glycosylation of APP and Aβ production.
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Ali F, Siddique YH. Bioavailability and Pharmaco-therapeutic Potential of Luteolin in Overcoming Alzheimer's Disease. CNS & NEUROLOGICAL DISORDERS-DRUG TARGETS 2020; 18:352-365. [PMID: 30892166 DOI: 10.2174/1871527318666190319141835] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 11/30/2018] [Accepted: 03/08/2019] [Indexed: 12/22/2022]
Abstract
Luteolin is a naturally occurring, yellow crystalline flavonoid found in numerous dietary supplements we frequently have in our meals. Studies in the last 2 decades have revealed its therapeutic potential to reduce the Alzheimer's disease (AD) symptoms in various in vitro and in vivo models. The anti-Alzheimer's potential of luteolin is attributed to its ability to suppress Aβ as well as tau aggregation or promote their disaggregation, down-regulate the expression of COX-2, NOS, MMP-9, TNF-α, interleukins and chemokines, reduce oxidative stress by scavenging ROS, modulate the activities of transcription factors CREB, cJun, Nrf-1, NF-κB, p38, p53, AP-1 and β-catenine and inhibiting the activities of various protein kinases. In several systems, luteolin has been described as a potent antioxidant and anti-inflammatory agent. In addition, we have also discussed about the bio-availability of the luteolin in the plasma. After being metabolized luteolin persists in plasma as glucuronides and sulphate-conjugates. Human clinical trials indicated no dose limiting toxicity when administered at a dose of 100 mg/day. Improvements in the formulations and drug delivery systems may further enhance the bioavailability and potency of luteolin. The current review describes in detail the data supporting these studies.
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Affiliation(s)
- Fahad Ali
- Department of Zoology, Aligarh Muslim University, Aligarh-202002, India
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Escamilla-Ayala A, Wouters R, Sannerud R, Annaert W. Contribution of the Presenilins in the cell biology, structure and function of γ-secretase. Semin Cell Dev Biol 2020; 105:12-26. [DOI: 10.1016/j.semcdb.2020.02.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 02/06/2020] [Accepted: 02/17/2020] [Indexed: 01/25/2023]
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Gad RA, Abdel-Reheim ES, Shehab GMG, Hafez HS, Abuelsaad ASA. Evaluation of Insulin Resistance Induced Brain Tissue Dysfunction in Obese Dams and their Neonates: Role of Ipriflavone Amelioration. Comb Chem High Throughput Screen 2020; 24:767-780. [PMID: 32772909 DOI: 10.2174/1386207323666200808181148] [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: 04/03/2020] [Revised: 06/13/2020] [Accepted: 06/17/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Nonalcoholic steatohepatitis (NASH) is associated with activation of liver fibrogenesis and predisposes to cirrhosis and associated morbi-mortality. A high fat high cholesterol diet (HFD) was provided to female albino rats to establish a NASH model. It is well known that the offspring of obese mothers have an increased risk of obesity and diabetes. The present study aimed at evaluating the ameliorative effects of ipriflavone (IP) as a natural food supplement on lipid metabolism, improving insulin sensitivity, reducing oxidative stress and inflammation, modifying metabolic risk factors and/or reduce brain damage, in both neonates and their dams. MATERIALS AND METHODS The present aim was achieved by evaluating the oxidative stress and antioxidant defense system biomarkers, as thiobarbituric acid reactive substances (TBARS) and reduced glutathione (GSH), catalase, and superoxide dismutase (SOD) activities. In addition, the neurotransmitter acetylcholine (Ach) and acetylcholine esterase (AchE) activities, as well as levels of the apolipoprotein E4 (APOE4); β-secretase, hyper phosphor-tau and β-amyloid 42; 3-hydroxy- 3-methyl glutaryl coenzyme A reductase (HMG CoA R)" and COX-II by immunoblotting assays in the brain tissue of neonates and their dams in all the studied groups. RESULTS A very significant amelioration in acetylcholine and acetylcholine esterase neurotransmitters, Alzheimer's makers (β-amyloid), antioxidants (reduced glutathione (GSH) contents, catalase (CAT) and superoxide dismutase (SOD); and inflammatory cytokines in NASH model is observed upon administrating ipriflavone (IP) as a natural food supplement. The multifunctional activities of ipriflavone as an antioxidant, anti-inflammatory and anti-insulin resistance drug were discussed and correlated with other investigations. CONCLUSION Regarding steatohepatitis, the present study confirmed the anti-inflammatory effects of the ipriflavone (IP). Therefore, future studies should focus on hepatic fatty acid uptake, hepatic lipogenesis, and fatty acid oxidation and the role of IP in regulating hepatic fat metabolism. In addition, natural products like IP could be combined with the highly used pharmaceutical drugs to reduce the side effects of nonalcoholic steatohepatitis, and minimize progression of dementia. Moreover, the present study supports further attempts to heal the neural dysfunction via antioxidant and anti-inflammatory cascade activities using ipriflavone (IP).
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Affiliation(s)
- Rania A Gad
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Nahda University, Beni-Suef (NUB), Beni-Suef, 62511, Egypt
| | - Eman S Abdel-Reheim
- Physiology Divisions; Department of Zoology, Faculty of Science, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Gaber M G Shehab
- Department of Biochemistry, College of Medicine, Taif University, Taif 21944, Saudi Arabia
| | - Hani S Hafez
- Zoology Department, Faculty of Science, Suez University, Suez, Egypt
| | - Abdelaziz S A Abuelsaad
- Immunology Divisions; Department of Zoology, Faculty of Science, Beni-Suef University, Beni-Suef 62511, Egypt
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Islam J, Shree A, Afzal SM, Vafa A, Sultana S. Protective effect of Diosmin against benzo(a)pyrene-induced lung injury in Swiss Albino Mice. ENVIRONMENTAL TOXICOLOGY 2020; 35:747-757. [PMID: 32061149 DOI: 10.1002/tox.22909] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/03/2020] [Accepted: 02/04/2020] [Indexed: 06/10/2023]
Abstract
Diosmin, a naturally occurring flavonoid commonly present in citrus fruit, is known to exhibit anti-inflammatory, antimutagenic, antioxidant, and free radical scavenging as well as blood lipid lowering activities among others. Diosmin has also been used for the treatment of various diseases including diabetes mellitus and Alzheimer's disease. Our study explores the role of Diosmin in pulmonary toxicity (lung injury) induced by environmental contaminant benzo(a)pyrene [B(a)P]. Swiss Albino Mice (SAM) were administered with either Diosmin 100 or 200 mg/kg body weight daily for 14 days and then challenged with a single dose of B(a)P. On the 15th day, animals were sacrificed; lung tissues and blood were collected for molecular analysis. B(a)P administration in mice induced the thickening of lung epithelium, damaged alveolar architecture, and promoted inflammatory cell infiltration in the lung tissues. Also, B[a]P significantly increased the expression of NF-kB, COX-2, IL-6, Bax, cleaved caspase 3, and cleaved PARP proteins and decreased antioxidant enzyme levels. Diosmin-100 and Diosmin-200 significantly attenuated the damage to lung epithelium, alveolar architecture, and reduced inflammatory cell infiltration in the lung tissues of mice. Diosmin significantly (P < .05) attenuated the levels of oxidative stress markers: lactate dehydrogenase and xanthine oxidase. A decrease in expression of NF-kB, COX-2, IL-6, Bax, cleaved caspase 3, and cleaved PARP proteins in mice was challenged with B[a]P. Diosmin thus could be a promising therapeutic adjuvant against B[a]P-induced oxidative stress and lung damage.
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Affiliation(s)
- Johirul Islam
- Department of Toxicology, Jamia Hamdard, New Delhi, India
| | - Alpa Shree
- Department of Toxicology, Jamia Hamdard, New Delhi, India
| | - Shekh M Afzal
- Department of Toxicology, Jamia Hamdard, New Delhi, India
| | - Abul Vafa
- Department of Toxicology, Jamia Hamdard, New Delhi, India
| | - Sarwat Sultana
- Department of Toxicology, Jamia Hamdard, New Delhi, India
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Stefanescu R, Stanciu GD, Luca A, Paduraru L, Tamba BI. Secondary Metabolites from Plants Possessing Inhibitory Properties against Beta-Amyloid Aggregation as Revealed by Thioflavin-T Assay and Correlations with Investigations on Transgenic Mouse Models of Alzheimer's Disease. Biomolecules 2020; 10:E870. [PMID: 32517180 PMCID: PMC7355648 DOI: 10.3390/biom10060870] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 05/28/2020] [Accepted: 06/05/2020] [Indexed: 12/11/2022] Open
Abstract
Alzheimer's disease is a neurodegenerative disorder for which there is a continuous search of drugs able to reduce or stop the cognitive decline. Beta-amyloid peptides are composed of 40 and 42 amino acids and are considered a major cause of neuronal toxicity. They are prone to aggregation, yielding oligomers and fibrils through the inter-molecular binding between the amino acid sequences (17-42) of multiple amyloid-beta molecules. Additionally, amyloid deposition causes cerebral amyloid angiopathy. The present study aims to identify, in the existing literature, natural plant derived products possessing inhibitory properties against aggregation. The studies searched proved the anti-aggregating effects by the thioflavin T assay and through behavioral, biochemical, and histological analysis carried out upon administration of natural chemical compounds to transgenic mouse models of Alzheimer's disease. According to our present study results, fifteen secondary metabolites from plants were identified which presented both evidence coming from the thioflavin T assay and transgenic mouse models developing Alzheimer's disease and six additional metabolites were mentioned due to their inhibitory effects against fibrillogenesis. Among them, epigallocatechin-3-gallate, luteolin, myricetin, and silibinin were proven to lower the aggregation to less than 40%.
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Affiliation(s)
- Raluca Stefanescu
- Center for Advanced Research and Development in Experimental Medicine (CEMEX), “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (R.S.); (A.L.); (B.-I.T.)
| | - Gabriela Dumitriṭa Stanciu
- Center for Advanced Research and Development in Experimental Medicine (CEMEX), “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (R.S.); (A.L.); (B.-I.T.)
| | - Andrei Luca
- Center for Advanced Research and Development in Experimental Medicine (CEMEX), “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (R.S.); (A.L.); (B.-I.T.)
- Department of Pneumology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Luminita Paduraru
- Division Neonatology, Department Mother & Child Care, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania;
| | - Bogdan-Ionel Tamba
- Center for Advanced Research and Development in Experimental Medicine (CEMEX), “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (R.S.); (A.L.); (B.-I.T.)
- Department of Pharmacology, Clinical Pharmacology and Algesiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
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Wahid M, Ali A, Saqib F, Aleem A, Bibi S, Afzal K, Ali A, Baig A, Khan SA, Bin Asad MHH. Pharmacological exploration of traditional plants for the treatment of neurodegenerative disorders. Phytother Res 2020; 34:3089-3112. [DOI: 10.1002/ptr.6742] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 05/05/2020] [Accepted: 05/07/2020] [Indexed: 12/24/2022]
Affiliation(s)
- Muqeet Wahid
- Faculty of Pharmacy, Department of Pharmacology Bahauddin Zakariya University Multan Pakistan
- Institute of Food Science and Nutrition Bahauddin Zakariya University Multan Pakistan
| | - Anam Ali
- Faculty of Pharmacy, Department of Pharmacology Bahauddin Zakariya University Multan Pakistan
| | - Fatima Saqib
- Faculty of Pharmacy, Department of Pharmacology Bahauddin Zakariya University Multan Pakistan
| | - Ambreen Aleem
- Faculty of Pharmacy, Department of Pharmacology Bahauddin Zakariya University Multan Pakistan
| | - Sumbal Bibi
- Department of Pharmacy COMSATS University Islamabad Abbottabad Pakistan
| | - Khurram Afzal
- Institute of Food Science and Nutrition Bahauddin Zakariya University Multan Pakistan
| | - Atif Ali
- Department of Pharmacy COMSATS University Islamabad Abbottabad Pakistan
| | - Ayesha Baig
- Department of Biotechnology COMSATS University Islamabad Abbottabad Pakistan
| | - Shujaat Ali Khan
- Department of Pharmacy COMSATS University Islamabad Abbottabad Pakistan
| | - Muhammad Hassham Hassan Bin Asad
- Department of Pharmacy COMSATS University Islamabad Abbottabad Pakistan
- Department of Genetics, Institute of Fundamental Medicine and Biology Kazan Federal University Kazan Russia
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Uddin MS, Kabir MT, Niaz K, Jeandet P, Clément C, Mathew B, Rauf A, Rengasamy KR, Sobarzo-Sánchez E, Ashraf GM, Aleya L. Molecular Insight into the Therapeutic Promise of Flavonoids against Alzheimer's Disease. Molecules 2020; 25:molecules25061267. [PMID: 32168835 PMCID: PMC7143946 DOI: 10.3390/molecules25061267] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/05/2020] [Accepted: 03/10/2020] [Indexed: 12/12/2022] Open
Abstract
Alzheimer’s disease (AD) is one of the utmost chronic neurodegenerative disorders, which is characterized from a neuropathological point of view by the aggregates of amyloid beta (Aβ) peptides that are deposited as senile plaques and tau proteins which form neurofibrillary tangles (NFTs). Even though advancement has been observed in order to understand AD pathogenesis, currently available therapeutic methods can only deliver modest symptomatic relief. Interestingly, naturally occurring dietary flavonoids have gained substantial attention due to their antioxidative, anti-inflammatory, and anti-amyloidogenic properties as alternative candidates for AD therapy. Experimental proof provides support to the idea that some flavonoids might protect AD by interfering with the production and aggregation of Aβ peptides and/or decreasing the aggregation of tau. Flavonoids have the ability to promote clearance of Aβ peptides and inhibit tau phosphorylation by the mTOR/autophagy signaling pathway. Moreover, due to their cholinesterase inhibitory potential, flavonoids can represent promising symptomatic anti-Alzheimer agents. Several processes have been suggested for the aptitude of flavonoids to slow down the advancement or to avert the onset of Alzheimer’s pathogenesis. To enhance cognitive performance and to prevent the onset and progress of AD, the interaction of flavonoids with various signaling pathways is proposed to exert their therapeutic potential. Therefore, this review elaborates on the probable therapeutic approaches of flavonoids aimed at averting or slowing the progression of the AD pathogenesis.
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Affiliation(s)
- Md. Sahab Uddin
- Department of Pharmacy, Southeast University, Dhaka 1213, Bangladesh
- Pharmakon Neuroscience Research Network, Dhaka 1207, Bangladesh
- Correspondence: or (M.S.U.); (P.J.); Tel.: +880-1710220110 (M.S.U.); +33-3-26913-341 (P.J.)
| | | | - Kamal Niaz
- Department of Pharmacology and Toxicology, Faculty of Bio-Sciences, Cholistan University of Veterinary and Animal Sciences (CUVAS), Bahawalpur 63100, Pakistan
| | - Philippe Jeandet
- Research Unit, Induced Resistance and Plant Bioprotection, EA 4707, SFR Condorcet FR CNRS 3417, Faculty of Sciences, University of Reims Champagne-Ardenne, PO Box 1039, 51687 Reims CEDEX 2, France
- Correspondence: or (M.S.U.); (P.J.); Tel.: +880-1710220110 (M.S.U.); +33-3-26913-341 (P.J.)
| | - Christophe Clément
- Research Unit, Induced Resistance and Plant Bioprotection, EA 4707, SFR Condorcet FR CNRS 3417, Faculty of Sciences, University of Reims Champagne-Ardenne, PO Box 1039, 51687 Reims CEDEX 2, France
| | - Bijo Mathew
- Division of Drug Design and Medicinal Chemistry Research Lab, Department of Pharmaceutical Chemistry, Ahalia School of Pharmacy, Palakkad, Kerala 678557, India
| | - Abdur Rauf
- Department of Chemistry, University of Swabi, Anbar 23561, Khyber Pakhtunkhwa, Pakistan
| | | | - Eduardo Sobarzo-Sánchez
- Instituto de Investigación e Innovación en Salud, Facultad de Ciencias de la Salud, Universidad Central de Chile, Santiago 8330507, Chile
- Department of Organic Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Ghulam Md Ashraf
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Lotfi Aleya
- Chrono-Environnement Laboratory, UMR CNRS 6249, Bourgogne Franche-Comté University, F-25030 Besançon, France
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Portis SM, Chaput D, Burroughs B, Hudson C, Sanberg PR, Bickford PC. Effects of nutraceutical intervention on serum proteins in aged rats. GeroScience 2020; 42:703-713. [PMID: 32157596 PMCID: PMC7205771 DOI: 10.1007/s11357-020-00174-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 02/27/2020] [Indexed: 12/18/2022] Open
Abstract
Aging is associated with many pathophysiological changes that could lead to the onset of degenerative disease. Some of the physiological changes that occur with aging include increased inflammation and decreased stem cell proliferation, leading to decreased capacity for tissue regeneration and loss of function. In previous studies, we and others have found nutraceutical intervention to ameliorate some of the deleterious effects associated with aging. In particular, we have previously shown that NT-020, a supplement composed of a proprietary blend of blueberries, green tea, vitamin D3, and carnosine, is able to rescue age-related cognitive deficits, impaired neurogenesis, and inflammation in rats. We have also previously demonstrated that stem cells cultured with old serum showed decreased proliferation; however, when stem cells were cultured in serum from old rats given a diet supplemented with NT-020, proliferation did not differ from that of cells cultured with serum from young rats. While it is clear that NT-020 is exerting a therapeutic, anti-aging effect, the mechanisms of action were yet to be fully elucidated.To that end, in the present study, we conducted a bioinformatics experiment to examine the rat proteome of serum from young and old control rats and young and old rats given a diet supplemented with NT-020. Serum from old rats showed an increase in some inflammatory and pro-aging factors while serum from old rats given a diet supplemented with NT-020 showed an increase in some anti-aging factors, most notably proteins associated with the complement system and autophagy. A number of immune functions that increase with age were shown to be downregulated with NT-020 treatment.
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Affiliation(s)
- Samantha M Portis
- Department of Neurosurgery and Brain Repair, Center of Excellence for Aging and Brain Repair, USF Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, USA
| | - Dale Chaput
- Proteomics and Mass Spectrometry Facility, College of Arts and Sciences, University of South Florida, Tampa, FL, 33612, USA
| | - Beau Burroughs
- Proteomics Core Facility, College of Medicine, University of South Florida, Tampa, FL, 33612, USA
| | - Charles Hudson
- James A. Haley VA Hospital, Research Service, 13000 Bruce B Downs Blvd, Tampa, FL, 33612, USA
| | - Paul R Sanberg
- Department of Neurosurgery and Brain Repair, Center of Excellence for Aging and Brain Repair, USF Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, USA
| | - Paula C Bickford
- Department of Neurosurgery and Brain Repair, Center of Excellence for Aging and Brain Repair, USF Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, USA.
- James A. Haley VA Hospital, Research Service, 13000 Bruce B Downs Blvd, Tampa, FL, 33612, USA.
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A novel rhamnoside derivative PL402 up-regulates matrix metalloproteinase 3/9 to promote Aβ degradation and alleviates Alzheimer's-like pathology. Aging (Albany NY) 2020; 12:481-501. [PMID: 31901901 PMCID: PMC6977668 DOI: 10.18632/aging.102637] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 12/23/2019] [Indexed: 02/06/2023]
Abstract
The accumulation of amyloid-β (Aβ), considered as the major cause of Alzheimer’s disease (AD) pathogenesis, relays on the rate of its biosynthesis and degradation. Aβ degradation is a common overture to late-onset AD and targeting the impairment of Aβ degradation has gained attention in the recent years. In this study, we demonstrated a rhamnoside derivative PL402 suppressed Aβ level in cell models without changing the expression or activity of Aβ generation-related secretases. However, the levels of matrix metalloproteinase (MMP) 3 and 9, belonging to amyloid-degrading enzymes (ADEs), were up-regulated by PL402. The inhibition or the knockdown of these two enzymes abolished the effect of PL402, indicating that PL402 may reduce Aβ via MMP3/9-mediated Aβ degradation. Notably, administration of PL402 significantly attenuated Aβ pathology and cognitive defects in APP/PS1 transgenic mice with the consistent promotion of ADEs expression. Thus, our study suggests that targeting Aβ degradation could be an effective strategy against AD and the rhamnoside derivatives may have therapeutic effects.
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Zheng Y, Zhang R, Shi W, Li L, Liu H, Chen Z, Wu L. Metabolism and pharmacological activities of the natural health-benefiting compound diosmin. Food Funct 2020; 11:8472-8492. [DOI: 10.1039/d0fo01598a] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Diosmin is a famous natural flavonoid for treating chronic venous insufficiency and varicose veins.
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Affiliation(s)
- Yizhou Zheng
- College of Pharmacy
- Gannan Medical University
- Ganzhou
- China
| | - Rui Zhang
- College of Pharmacy
- Gannan Medical University
- Ganzhou
- China
| | - Weimei Shi
- College of Pharmacy
- Gannan Medical University
- Ganzhou
- China
| | - Linfu Li
- College of Pharmacy
- Gannan Medical University
- Ganzhou
- China
| | - Hai Liu
- College of Pharmacy
- Gannan Medical University
- Ganzhou
- China
| | - Zhixi Chen
- College of Pharmacy
- Gannan Medical University
- Ganzhou
- China
| | - Longhuo Wu
- College of Pharmacy
- Gannan Medical University
- Ganzhou
- China
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Phosphorylation Signaling in APP Processing in Alzheimer's Disease. Int J Mol Sci 2019; 21:ijms21010209. [PMID: 31892243 PMCID: PMC6981488 DOI: 10.3390/ijms21010209] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 12/23/2019] [Accepted: 12/24/2019] [Indexed: 12/13/2022] Open
Abstract
The abnormal accumulation of amyloid-β (Aβ) in the central nervous system is a hallmark of Alzheimer’s disease (AD). The regulation of the processing of the single- transmembrane amyloid precursor protein (APP) plays an important role in the generation of Aβ in the brain. The phosphorylation of APP and key enzymes involved in the proteolytic processing of APP has been demonstrated to be critical for modulating the generation of Aβ by either altering the subcellular localization of APP or changing the enzymatic activities of the secretases responsible for APP processing. In addition, the phosphorylation may also have an impact on the physiological function of these proteins. In this review, we summarize the kinases and signaling pathways that may participate in regulating the phosphorylation of APP and secretases and how this further affects the function and processing of APP and Aβ pathology. We also discuss the potential of approaches that modulate these phosphorylation-signaling pathways or kinases as interventions for AD pathology.
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50
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Management of oxidative stress and other pathologies in Alzheimer’s disease. Arch Toxicol 2019; 93:2491-2513. [DOI: 10.1007/s00204-019-02538-y] [Citation(s) in RCA: 103] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 08/14/2019] [Indexed: 12/13/2022]
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