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Wu X, Zhou Y, Xi Y, Zhou H, Tang Z, Xiong L, Qin D. Polyphenols: Natural Food-Grade Biomolecules for the Treatment of Nervous System Diseases from a Multi-Target Perspective. Pharmaceuticals (Basel) 2024; 17:775. [PMID: 38931442 PMCID: PMC11206395 DOI: 10.3390/ph17060775] [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: 05/24/2024] [Revised: 06/08/2024] [Accepted: 06/11/2024] [Indexed: 06/28/2024] Open
Abstract
Polyphenols are the most prevalent naturally occurring phytochemicals in the human diet and range in complexity from simple molecules to high-molecular-weight polymers. They have a broad range of chemical structures and are generally categorized as "neuroprotective", "anti-inflammatory", and "antioxidant" given their main function of halting disease onset and promoting health. Research has shown that some polyphenols and their metabolites can penetrate the blood-brain barrier and hence increase neuroprotective signaling and neurohormonal effects to provide anti-inflammatory and antioxidant effects. Therefore, multi-targeted modulation of polyphenols may prevent the progression of neuropsychiatric disorders and provide a new practical therapeutic strategy for difficult-to-treat neuropsychiatric disorders. Therefore, multi-target modulation of polyphenols has the potential to prevent the progression of neuropsychiatric disorders and provide a new practical therapeutic strategy for such nervous system diseases. Herein, we review the therapeutic benefits of polyphenols on autism-spectrum disorders, anxiety disorders, depression, and sleep disorders, along with in vitro and ex vivo experimental and clinical trials. Although their methods of action are still under investigation, polyphenols are still seldom employed directly as therapeutic agents for nervous system disorders. Comprehensive mechanistic investigations and large-scale multicenter randomized controlled trials are required to properly evaluate the safety, effectiveness, and side effects of polyphenols.
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Affiliation(s)
- Xinchen Wu
- The First School of Clinical Medicine, Yunnan University of Chinese Medicine, Kunming 650500, China; (X.W.); (Y.Z.); (Y.X.)
| | - Yang Zhou
- The First School of Clinical Medicine, Yunnan University of Chinese Medicine, Kunming 650500, China; (X.W.); (Y.Z.); (Y.X.)
| | - Yujiang Xi
- The First School of Clinical Medicine, Yunnan University of Chinese Medicine, Kunming 650500, China; (X.W.); (Y.Z.); (Y.X.)
| | - Haimei Zhou
- School of Basic Medical Science, Yunnan University of Chinese Medicine, Kunming 650500, China; (H.Z.); (Z.T.)
| | - Zhengxiu Tang
- School of Basic Medical Science, Yunnan University of Chinese Medicine, Kunming 650500, China; (H.Z.); (Z.T.)
| | - Lei Xiong
- The First School of Clinical Medicine, Yunnan University of Chinese Medicine, Kunming 650500, China; (X.W.); (Y.Z.); (Y.X.)
| | - Dongdong Qin
- School of Basic Medical Science, Yunnan University of Chinese Medicine, Kunming 650500, China; (H.Z.); (Z.T.)
- Key Laboratory of Traditional Chinese Medicine for Prevention and Treatment of Neuropsychiatric Diseases, Yunnan University of Chinese Medicine, Kunming 650500, China
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Eid A, Ghaleb SS, Zaki A, Ibrahim M, Farghali AA, Ali LE, Abdelgawad MA, Ghoneim MM, Al-Serwi RH, Hassan RM, Ahmad M. Hesperidin Attenuates Titanium Dioxide Nanoparticle-Induced Neurotoxicity in Rats by Regulating Nrf-2/TNF-α Signaling Pathway, the Suppression of Oxidative Stress, and Inflammation. ACS OMEGA 2023; 8:37584-37591. [PMID: 37841165 PMCID: PMC10568688 DOI: 10.1021/acsomega.3c06198] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 09/06/2023] [Indexed: 10/17/2023]
Abstract
Background: Titanium dioxide nanoparticles (TiO2NPs) are widely utilized and consumed mainly as food additives. Oxidative stress is considered to be the basic effect of TiO2NPs through biological interactions. Hesperidin (HSP) is a bioflavonoid (flavanone glycoside) with lipid-lowering, inflammation, oxidative stress suppression, antihypertensive, cancer-fighting, and antiedema effects. Objective: This study was to investigate the possible protective influences of HSP of subchronic oral TiO2NP exposure on the brains of rats, including neurotransmitters, oxidative stress/antioxidant parameters, inflammatory markers, and histological changes in the brains of adult male albino rats. Methodology: The experiment was executed on 80 albino rats. The animals were randomly divided into 4 equal groups. The first group served as a control; the second group was treated with oral doses of HSP (100 mg/kg Bw daily); the third group received TiO2NPs (200 mg/kg Bw orally daily); and the fourth group was treated with TiO2NPs and an oral dose of HSP daily for 8 weeks. Blood samples were obtained for biochemical analysis. Neurotransmitters, oxidative stress biomarker levels, and inflammatory markers were measured in brain homogenates. Histological examination of the brain was performed through H&E staining. Results: Coadministration of hesperidin with TiO2NPs orally for 8 weeks decreased the levels of MDA, TNF-α, AChE, and dopamine in brain homogenates, which were increased in the TiO2NP group. It increased the other oxidative biomarkers (SOD, CAT, and GPx) and Nrf-2 expression levels. Brain histological sections of the TiO2NP-treated group show degeneration, necrosis, congestion, and inflammatory cell infiltration that decreased markedly in the coadministration of hesperidin with the TiO2NP group. Conclusion: Hesperidin cotreatment offers significant protection against TiO2NP-induced oxidative stress and biochemical and histological alteration in the brain.
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Affiliation(s)
- Amir Eid
- Forensic
Medicine and Clinical Toxicology department, Faculty of Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Sherien S. Ghaleb
- Forensic
Medicine and Clinical Toxicology department, Faculty of Medicine, Cairo University, Cairo 11511, Egypt
| | - Amr Zaki
- Forensic
Medicine and Clinical Toxicology department, Faculty of Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Marwa Ibrahim
- Biochemistry
and Molecular Biology Department, Faculty of Veterinary Medicine, Cairo University, Cairo 11511, Egypt
| | - Ahmed A. Farghali
- Materials
Science and Nanotechnology Department, Faculty of Postgraduate Studies
for Advanced Sciences (PSAS), Beni-Suef
University, Beni-Suef 62511, Egypt
| | - Lamiaa E. Ali
- Forensic
Medicine and Clinical Toxicology department, Faculty of Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Mohamed A. Abdelgawad
- Department
of Pharmaceutical Chemistry, College of Pharmacy, Jouf University Sakaka 72341, Saudi Arabia
| | - Mohammed M. Ghoneim
- Department
of Pharmacy Practice, College of Pharmacy, AlMaarefa University, Ad Diriyah 13713, Saudi Arabia
| | - Rasha Hamed Al-Serwi
- Department
of Basic Dental Sciences, College of Dentistry, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Randa M. Hassan
- Cytology
and Histology department, faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Manar Ahmad
- Forensic
Medicine and Clinical Toxicology department, Faculty of Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
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Gopnar VV, Rakshit D, Bandakinda M, Kulhari U, Sahu BD, Mishra A. Fisetin attenuates arsenic and fluoride subacute co-exposure induced neurotoxicity via regulating TNF-α mediated activation of NLRP3 inflammasome. Neurotoxicology 2023:S0161-813X(23)00086-4. [PMID: 37331635 DOI: 10.1016/j.neuro.2023.06.006] [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: 04/17/2023] [Revised: 05/29/2023] [Accepted: 06/14/2023] [Indexed: 06/20/2023]
Abstract
Groundwater is considered safe, however, the occurrence of contaminants like arsenic and fluoride has raised a major healthcare concern. Clinical studies suggested that arsenic and fluoride co-exposure induced neurotoxicity, however efforts to explore safe and effective management of such neurotoxicity are limited. Therefore, we investigated the ameliorative effect of Fisetin against arsenic and fluoride subacute co-exposure-induced neurotoxicity, and associated biochemical and molecular changes. Male BALB/c mice Arsenic (NaAsO2: 50mg/L) and fluoride (NaF: 50mg/L) were exposed to drinking water and fisetin (5, 10, and 20mg/kg/day) was administered orally for 28 days. The neurobehavioral changes were recorded in the open field, rotarod, grip strength, tail suspension, forced swim, and novel object recognition test. The co-exposure resulted in anxiety-like behaviour, loss of motor coordination, depression-like behaviour, and loss of novelty-based memory, along with enhanced prooxidant, inflammatory markers and loss of cortical and hippocampal neurons. The treatment with fisetin reversed the co-exposure-induced neurobehavioral deficit along with restoration of redox & inflammatory milieu, and cortical and hippocampal neuronal density. Apart from antioxidants, inhibition of TNF-α/ NLRP3 expression has been suggested as one of the plausible neuroprotective mechanisms of Fisetin in this study.
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Affiliation(s)
- Vitthal V Gopnar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam - 781101, India
| | - Debarati Rakshit
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam - 781101, India
| | - Mounisha Bandakinda
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam - 781101, India
| | - Uttam Kulhari
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam - 781101, India
| | - Bidya Dhar Sahu
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam - 781101, India
| | - Awanish Mishra
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam - 781101, India.
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Ottappilakkil H, Babu S, Balasubramanian S, Manoharan S, Perumal E. Fluoride Induced Neurobehavioral Impairments in Experimental Animals: a Brief Review. Biol Trace Elem Res 2023; 201:1214-1236. [PMID: 35488996 DOI: 10.1007/s12011-022-03242-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 04/09/2022] [Indexed: 02/07/2023]
Abstract
Fluoride is one of the major toxicants in the environment and is often found in drinking water at higher concentrations. Living organisms including humans exposed to high fluoride levels are found to develop mild-to-severe detrimental pathological conditions called fluorosis. Fluoride can cross the hematoencephalic barrier and settle in various brain regions. This accumulation affects the structure and function of both the central and peripheral nervous systems. The neural ultrastructure damages are reflected in metabolic and cognitive activities. Hindrances in synaptic plasticity and signal transmission, early neuronal apoptosis, functional alterations of the intercellular signaling pathway components, improper protein synthesis, dyshomeostasis of the transcriptional and neurotrophic factors, oxidative stress, and inflammatory responses are accounted for the fluoride neurotoxicity. Fluoride causes a decline in brain functions that directly influence the overall quality of life in both humans and animals. Animal studies are widely used to explore the etiology of fluoride-induced neurotoxicity. A good number of these studies support a positive correlation between fluoride intake and toxicity phenotypes closely associated with neurotoxicity. However, the experimental dosages highly surpass the normal environmental concentrations and are difficult to compare with human exposures. The treatment procedures are highly dependent on the dosage, duration of exposure, sex, and age of specimens among other factors which make it difficult to arrive at general conclusions. Our review aims to explore fluoride-induced neuronal damage along with associated histopathological, behavioral, and cognitive effects in experimental models. Furthermore, the correlation of various molecular mechanisms upon fluoride intoxication and associated neurobehavioral deficits has been discussed. Since there is no well-established mechanism to prevent fluorosis, phytochemical-based alleviation of its characteristic indications has been proposed as a possible remedial measure.
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Affiliation(s)
| | - Srija Babu
- Bharathiar University, Coimbatore, Tamilnadu, India
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Zhao Y, Zhao X, Wang J. Choline alleviated perinatal fluoride exposure-induced learning and memory impairment through α4β2 nAChRs and α7 nAChRs in offspring mice. ENVIRONMENTAL TOXICOLOGY 2023; 38:511-521. [PMID: 36286330 DOI: 10.1002/tox.23692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/28/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Fluoride pollution is widely present in the living environment. As a critical period of brain development, the perinatal period is extremely vulnerable to fluoride. Studies have found that choline can protect the brain's memory and enhance the ability to focus. However, the effect of choline on perinatal fluoride-induced nerve damage remains unclear. Therefore, 32 Kunming newly conceived female mice and their offspring mice were randomly divided into control, NaF, LC + NaF, and HC + NaF groups, and the HE staining, Y-maze test, RT-PCR, western blotting, immunohistochemistry, etc. were used in this study. The results showed that fluoride decreased the brain organ coefficients and brain protein content (p < 0.05, p < 0.01), and caused histomorphological damage in the hippocampus and cortex, which suggested that fluoride affected the development of the brain and damaged the brain. Moreover, the results of the Y-maze test showed that fluoride increased the number of learning days, error reaction time, and total reaction time, and decreased the AchE activity in the brain (p < 0.05, p < 0.01), which indicated that fluoride reduced the learning and memory ability of the mice. Besides, the results showed that fluoride decreased the mRNA and protein expression levels of α4β2 nAChRs and α7 nAChRs in the hippocampus and cortex (p < 0.05, p < 0.01). However, perinatal choline supplementation reversed the aforementioned fluoride-induced changes. In short, these results demonstrated that choline alleviated perinatal fluoride-induced learning and memory impairment, which will provide a rationale for the mitigation and prevention of fluoride-induced brain damage.
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Affiliation(s)
- Yangfei Zhao
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, China
| | - Xiaojuan Zhao
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, China
- Science and Technology Research Center of China Customs, Beijing, China
| | - Jundong Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, China
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Li X, Huang W, Tan R, Xu C, Chen X, Li S, Liu Y, Qiu H, Cao H, Cheng Q. The benefits of hesperidin in central nervous system disorders, based on the neuroprotective effect. Biomed Pharmacother 2023; 159:114222. [PMID: 36628819 DOI: 10.1016/j.biopha.2023.114222] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
Disorders of central nervous system (CNS) disorders are considered serious health issues. The most common CNS diseases include neurodegenerative diseases, mental disorders, demyelinating disease, ischemia-reperfusion injury, and neuroinflammation. As a natural phenolic compound, hesperidin is a flavanone glycoside with various biological effects. Increasing evidence show that the growth of CNS diseases is hindered by hesperidin. Here, we have reviewed the related literature on neuropharmacological mechanisms for the preventive and therapeutic effects of hesperidin on CNS diseases. Several cellular and animal models have been developed to evaluate the underlying neuropharmacological mechanisms of hesperidin. Additionally, clinical evidence has confirmed its neuroprotective function. Hesperidin exerts its neuroprotective properties by decreasing neuro-inflammatory and apoptotic pathways. Hesperidin function has been studied in preclinical models for CNS diseases, but little is known about its definite effect in humans. Hesperidin can effectively alleviate depression and improve cognition and memory. It is urgent to explore and discover clinical trials for further confirmation of the neuroprotective efficacy of hesperidin and to evaluate its safety profile.
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Affiliation(s)
- Xinyu Li
- Department of Psychiatry, The School of Clinical Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China; Department of Psychiatry, Brain Hospital of Hunan Province (The Second People's Hospital of Hunan Province), Changsha, Hunan, China
| | - Wei Huang
- Department of Integrated Traditional Chinese and Western Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Rongrong Tan
- Department of Psychiatry, The School of Clinical Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China; Department of Psychiatry, Brain Hospital of Hunan Province (The Second People's Hospital of Hunan Province), Changsha, Hunan, China
| | - Caijuan Xu
- Department of Psychiatry, The School of Clinical Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China; Department of Psychiatry, Brain Hospital of Hunan Province (The Second People's Hospital of Hunan Province), Changsha, Hunan, China
| | - Xi Chen
- Department of Psychiatry, The School of Clinical Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China; Department of Psychiatry, Brain Hospital of Hunan Province (The Second People's Hospital of Hunan Province), Changsha, Hunan, China
| | - Sixin Li
- Department of Psychiatry, The School of Clinical Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China; Department of Psychiatry, Brain Hospital of Hunan Province (The Second People's Hospital of Hunan Province), Changsha, Hunan, China
| | - Ying Liu
- Department of Psychiatry, The School of Clinical Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China; Department of Psychiatry, Brain Hospital of Hunan Province (The Second People's Hospital of Hunan Province), Changsha, Hunan, China
| | - Huiwen Qiu
- Department of Psychiatry, The School of Clinical Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China; Department of Psychiatry, Brain Hospital of Hunan Province (The Second People's Hospital of Hunan Province), Changsha, Hunan, China
| | - Hui Cao
- Department of Psychiatry, The School of Clinical Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China; Department of Psychiatry, Brain Hospital of Hunan Province (The Second People's Hospital of Hunan Province), Changsha, Hunan, China.
| | - Quan Cheng
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Hunan, China.
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Bhattacharya S. A Review on Experimentally Proven Medicinal Plants and Their Constituents against Fluoride Toxicity. J Environ Pathol Toxicol Oncol 2023; 42:51-64. [PMID: 36734952 DOI: 10.1615/jenvironpatholtoxicoloncol.2022043545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Fluoride toxicity, principally by polluted groundwater, is regarded as a momentous global public health risk, as there is no particular and proven treatment for chronic fluoride toxicity i.e., fluorosis which leads to several serious health complications. Scientific literature reveals several medicinal plants and natural products alleviate experimentally induced fluoride toxicity. The present review attempts to collate those experimental studies on medicinal plants and plant derived natural products with fluoride toxicity ameliorative effects. Literature scrutiny was performed by using online bibliographic databases and the studies for the last 15 years were considered. Minerals and semi-synthetic or synthetic analogs of natural products were excluded. Literature study revealed that 25 medicinal plants and 17 natural products exhibited significant protection from fluoride toxicity in experimental animal models i.e., preclinical studies. Two clinical studies on medicinal plants were also found in literature showing beneficial yet poorly correlated outcome. Relevant research in this field could lead to development of a potentially useful agent in therapeutic management of fluoride toxicity in humans.
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Affiliation(s)
- Sanjib Bhattacharya
- West Bengal Medical Services Corporation Ltd., GN 29, Sector V, Salt Lake City, Kolkata 700091, West Bengal, India
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Bellavite P. Neuroprotective Potentials of Flavonoids: Experimental Studies and Mechanisms of Action. Antioxidants (Basel) 2023; 12:antiox12020280. [PMID: 36829840 PMCID: PMC9951959 DOI: 10.3390/antiox12020280] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 01/31/2023] Open
Abstract
Neurological and neurodegenerative diseases, particularly those related to aging, are on the rise, but drug therapies are rarely curative. Functional disorders and the organic degeneration of nervous tissue often have complex causes, in which phenomena of oxidative stress, inflammation and cytotoxicity are intertwined. For these reasons, the search for natural substances that can slow down or counteract these pathologies has increased rapidly over the last two decades. In this paper, studies on the neuroprotective effects of flavonoids (especially the two most widely used, hesperidin and quercetin) on animal models of depression, neurotoxicity, Alzheimer's disease (AD) and Parkinson's disease are reviewed. The literature on these topics amounts to a few hundred publications on in vitro and in vivo models (notably in rodents) and provides us with a very detailed picture of the action mechanisms and targets of these substances. These include the decrease in enzymes that produce reactive oxygen and ferroptosis, the inhibition of mono-amine oxidases, the stimulation of the Nrf2/ARE system, the induction of brain-derived neurotrophic factor production and, in the case of AD, the prevention of amyloid-beta aggregation. The inhibition of neuroinflammatory processes has been documented as a decrease in cytokine formation (mainly TNF-alpha and IL-1beta) by microglia and astrocytes, by modulating a number of regulatory proteins such as Nf-kB and NLRP3/inflammasome. Although clinical trials on humans are still scarce, preclinical studies allow us to consider hesperidin, quercetin, and other flavonoids as very interesting and safe dietary molecules to be further investigated as complementary treatments in order to prevent neurodegenerative diseases or to moderate their deleterious effects.
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Li H, Ren J, Li Y, Wu Q, Wei J. Oxidative stress: The nexus of obesity and cognitive dysfunction in diabetes. Front Endocrinol (Lausanne) 2023; 14:1134025. [PMID: 37077347 PMCID: PMC10107409 DOI: 10.3389/fendo.2023.1134025] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 03/02/2023] [Indexed: 04/05/2023] Open
Abstract
Obesity has been associated with oxidative stress. Obese patients are at increased risk for diabetic cognitive dysfunction, indicating a pathological link between obesity, oxidative stress, and diabetic cognitive dysfunction. Obesity can induce the biological process of oxidative stress by disrupting the adipose microenvironment (adipocytes, macrophages), mediating low-grade chronic inflammation, and mitochondrial dysfunction (mitochondrial division, fusion). Furthermore, oxidative stress can be implicated in insulin resistance, inflammation in neural tissues, and lipid metabolism disorders, affecting cognitive dysfunction in diabetics.
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Affiliation(s)
- Huimin Li
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jing Ren
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- Graduate School of Beijing University of Chinese Medicine, Beijing, China
| | - Yusi Li
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Qian Wu
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Junping Wei
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- *Correspondence: Junping Wei,
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Bartos M, Gumilar F, Baier CJ, Dominguez S, Bras C, Cancela LM, Minetti A, Gallegos CE. Rat developmental fluoride exposure affects retention memory, leads to a depressive-like behavior, and induces biochemical changes in offspring rat brains. Neurotoxicology 2022; 93:222-232. [DOI: 10.1016/j.neuro.2022.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 08/12/2022] [Accepted: 10/07/2022] [Indexed: 11/15/2022]
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Enayati A, Ghojoghnejad M, Roufogalis BD, Maollem SA, Sahebkar A. Impact of Phytochemicals on PPAR Receptors: Implications for Disease Treatments. PPAR Res 2022; 2022:4714914. [PMID: 36092543 PMCID: PMC9453090 DOI: 10.1155/2022/4714914] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 07/10/2022] [Indexed: 11/17/2022] Open
Abstract
Peroxisome proliferator-activated receptors (PPARs) are members of the ligand-dependent nuclear receptor family. PPARs have attracted wide attention as pharmacologic mediators to manage multiple diseases and their underlying signaling targets. They mediate a broad range of specific biological activities and multiple organ toxicity, including cellular differentiation, metabolic syndrome, cancer, atherosclerosis, neurodegeneration, cardiovascular diseases, and inflammation related to their up/downstream signaling pathways. Consequently, several types of selective PPAR ligands, such as fibrates and thiazolidinediones (TZDs), have been approved as their pharmacological agonists. Despite these advances, the use of PPAR agonists is known to cause adverse effects in various systems. Conversely, some naturally occurring PPAR agonists, including polyunsaturated fatty acids and natural endogenous PPAR agonists curcumin and resveratrol, have been introduced as safe agonists as a result of their clinical evidence or preclinical experiments. This review focuses on research on plant-derived active ingredients (natural phytochemicals) as potential safe and promising PPAR agonists. Moreover, it provides a comprehensive review and critique of the role of phytochemicals in PPARs-related diseases and provides an understanding of phytochemical-mediated PPAR-dependent and -independent cascades. The findings of this research will help to define the functions of phytochemicals as potent PPAR pharmacological agonists in underlying disease mechanisms and their related complications.
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Affiliation(s)
- Ayesheh Enayati
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Mobina Ghojoghnejad
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Basil D. Roufogalis
- Discipline of Pharmacology, School of Medical Sciences, University of Sydney, Sydney, NSW, Australia
- NICM Health Research Institute, Western Sydney University, Penrith, NSW, Australia
| | - Seyed Adel Maollem
- Department of Pharmacology and Toxicology, College of Pharmacy, Al-Zahraa University for Women, Karbala, Iraq
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amirhossein Sahebkar
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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Do methylenetetrahydrofolate dehydrogenase, cyclohydrolase, and formyltetrahydrofolate synthetase 1 polymorphisms modify changes in intelligence of school-age children in areas of endemic fluorosis? Chin Med J (Engl) 2022; 135:1846-1854. [PMID: 35838408 PMCID: PMC9521762 DOI: 10.1097/cm9.0000000000002062] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Excessive exposure to fluoride can reduce intelligence. Methylenetetrahydrofolate dehydrogenase, cyclohydrolase, and formyltetrahydrofolate synthetase 1 ( MTHFD1 ) polymorphisms have important roles in neurodevelopment. However, the association of MTHFD1 polymorphisms with children's intelligence changes in endemic fluorosis areas has been rarely explored. METHODS A cross-sectional study was conducted in four randomly selected primary schools in Tongxu County, Henan Province, from April to May in 2017. A total of 694 children aged 8 to 12 years were included in the study with the recruitment by the cluster sampling method. Urinary fluoride (UF) and urinary creatinine were separately determined using the fluoride ion-selective electrode and creatinine assay kit. Children were classified as the high fluoride group and control group according to the median of urinary creatinine-adjusted urinary fluoride (UF Cr ) level. Four loci of MTHFD1 were genotyped, and the Combined Raven's Test was used to evaluate children's intelligence quotient (IQ). Generalized linear model and multinomial logistic regression model were performed to analyze the associations between children's UF Cr level, MTHFD1 polymorphisms, and intelligence. The general linear model was used to explore the effects of gene-environment and gene-gene interaction on intelligence. RESULTS In the high fluoride group, children's IQ scores decreased by 2.502 when the UF Cr level increased by 1.0 mg/L (β = -2.502, 95% confidence interval [CI]:-4.411, -0.593), and the possibility for having "excellent" intelligence decreased by 46.3% (odds ratio = 0.537, 95% CI: 0.290, 0.994). Children with the GG genotype showed increased IQ scores than those with the AA genotype of rs11627387 locus in the high fluoride group ( P < 0.05). Interactions between fluoride exposure and MTHFD1 polymorphisms on intelligence were observed (Pinteraction < 0.05). CONCLUSION Our findings suggest that excessive fluoride exposure may have adverse effects on children's intelligence, and changes in children's intelligence may be associated with the interaction between fluoride and MTHFD1 polymorphisms.
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Neuromodulatory effects of hesperidin against sodium fluoride-induced neurotoxicity in rats: Involvement of neuroinflammation, endoplasmic reticulum stress, apoptosis and autophagy. Neurotoxicology 2022; 90:197-204. [DOI: 10.1016/j.neuro.2022.04.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 04/04/2022] [Accepted: 04/07/2022] [Indexed: 12/19/2022]
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Yang J, Li H, Hao Z, Jing X, Zhao Y, Cheng X, Ma H, Wang J, Wang J. Mitigation Effects of Selenium Nanoparticles on Depression-Like Behavior Induced by Fluoride in Mice via the JAK2-STAT3 Pathway. ACS APPLIED MATERIALS & INTERFACES 2022; 14:3685-3700. [PMID: 35023338 DOI: 10.1021/acsami.1c18417] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Depression is a mental health problem with typically high levels of distress and dysfunction, and 150 mg/L fluoride (F) can induce depression-like behavior. The development of depression is correlated with neuronal atrophy, insufficient secretion of monoamine neurotransmitters, extreme deviations from the normal microglial activation status, and immune-inflammatory response. Studies found that Se supplementation was related to the improvement of depression. In this study, we applied selenium nanoparticles (SeNPs) for F-induced depression disease mitigation by regulating the histopathology, metabolic index, genes, and protein expression related to the JAK2-STAT3 signaling pathway in vivo. Results showed that F and 2 mg Se/kg BW/day SeNPs lowered the dopamine (DA) content (P < 0.05), altered the microglial morphology, ramification index as well as solidity, and triggered the microglial neuroinflammatory response by increasing the p-STAT3 nuclear translocation (P < 0.01). Furthermore, F reduced the cortical Se content and the number of surviving neurons (P < 0.05), increasing the protein expressions of p-JAK2/JAK2 and p-STAT3/STAT3 of the cortex (P < 0.01), accompanied by the depression-like behavior. Importantly, 1 mg Se/kg BW/day SeNPs alleviated the microglial ramification index as well as solidity changes and decreased the interleukin-1β secretion induced by F by suppressing the p-STAT3 nuclear translocation (P < 0.01). Likewise, 1 mg Se/kg BW/day SeNPs restored the F-disturbed dopamine and noradrenaline secretion, increased the number of cortical surviving neurons, and reduced the vacuolation area, ultimately suppressing the occurrence of depression-like behavior through inhibiting the JAK2-STAT3 pathway activation. In conclusion, 1 mg Se/kg BW/day SeNPs have mitigation effects on the F-induced depression-like behavior. The mechanism of how SeNPs repair neural functions will benefit depression mitigation. This study also indicates that inhibiting the JAK/STAT pathway can be a promising novel treatment for depressive disorders.
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Affiliation(s)
- Jiarong Yang
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
- Shanxi Key Laboratory of Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
| | - Haojie Li
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
- Shanxi Key Laboratory of Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
| | - Zijun Hao
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
- Shanxi Key Laboratory of Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
| | - Xiaoyuan Jing
- College of Life Sciences, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
| | - Yangfei Zhao
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
- Shanxi Key Laboratory of Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
| | - Xiaofang Cheng
- Department of Basic Science, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
| | - Haili Ma
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
| | - Jundong Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
- Shanxi Key Laboratory of Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
| | - Jinming Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
- Shanxi Key Laboratory of Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, P.R. China
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Mishra A, Bandopadhyay R, Singh PK, Mishra PS, Sharma N, Khurana N. Neuroinflammation in neurological disorders: pharmacotherapeutic targets from bench to bedside. Metab Brain Dis 2021; 36:1591-1626. [PMID: 34387831 DOI: 10.1007/s11011-021-00806-4] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 07/22/2021] [Indexed: 02/07/2023]
Abstract
Neuroinflammation is one of the host defensive mechanisms through which the nervous system protects itself from pathogenic and or infectious insults. Moreover, neuroinflammation occurs as one of the most common pathological outcomes in various neurological disorders, makes it the promising target. The present review focuses on elaborating the recent advancement in understanding molecular mechanisms of neuroinflammation and its role in the etiopathogenesis of various neurological disorders, especially Alzheimer's disease (AD), Parkinson's disease (PD), and Epilepsy. Furthermore, the current status of anti-inflammatory agents in neurological diseases has been summarized in light of different preclinical and clinical studies. Finally, possible limitations and future directions for the effective use of anti-inflammatory agents in neurological disorders have been discussed.
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Affiliation(s)
- Awanish Mishra
- Department of Pharmacology, School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, 144411, India.
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Guwahati, Assam, 781101, India.
| | - Ritam Bandopadhyay
- Department of Pharmacology, School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, 144411, India
| | - Prabhakar Kumar Singh
- Department of Pharmacology, School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, 144411, India
| | - Pragya Shakti Mishra
- Department of Nuclear Medicine, Sanjay Gandhi Post Graduate Institute of Medical Sciences (SGPGIMS), Raebareli Road, Lucknow, 226014, India
| | - Neha Sharma
- Department of Pharmacology, School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, 144411, India
| | - Navneet Khurana
- Department of Pharmacology, School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, 144411, India
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Mishra A, Dahia A, Jaiswal A. Protective effect of Monoisoamyl-2, 3-Dimercaptosuccinic Acid against Manganese-induced Neurotoxicity in rats. Cent Nerv Syst Agents Med Chem 2021; 21:165-171. [PMID: 34433405 DOI: 10.2174/1871524921666210825093134] [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: 01/10/2021] [Revised: 06/17/2021] [Accepted: 06/21/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Apart from being an essential heavy metal, manganese (Mn) serves as an important component of the antioxidant enzyme system in humans. Overexposure to manganese leads to the development of manganism, which is characterized by motor dysfunction along with neurodegeneration. The management of manganism often utilizes chelation therapy. In this regard, Monoisoamyl-2, 3-Dimercaptosuccinic Acid (MiADMSA) has been reported as a novel arsenic chelator, due to the presence of vicinal sulfhydril group. MiADMSA has been reported to reduce the level in divalent ions (like copper) therefore, it may be hypothesized that MiADMSA would be helpful in Mn-induced neurotoxicity. OBJECTIVE This study is envisaged to explore the protective effect of MiADMSA on Mn-induced neurotoxicity. METHOD Mn exposure was carried out by intraperitoneal administration of Mn (as manganese chloride, 10 mg/kg; i.p.). The animals were treated with MiADMSA (50 mg/kg; p.o.) either alone or in combination with Mn. The effect of different treatments on neurobehavioral functions was observed by assessing spontaneous locomotor activity, motor rotarod test, and depression-like behavior in the forced swim test. After behavioral evaluations, all the animals were sacrificed and the brain and liver were isolated for metal estimations. RESULTS Mn exposure leads to loss of motor coordination as observed in spontaneous locomotor activity and rotarod test. However, treatment with MiADMSA significantly improved motor impairments as compared to Mn exposed animals. Accumulation of Mn in the liver and brain has been recorded with Mn exposure; however, MiADMSA treatment significantly reduced the Mn content from the liver and brain. CONCLUSION The outcome of the study suggests that treatment with MiADMSA reversed Mn-induced neurotoxicity by reducing Mn load. Therefore, the use of MiADMSA may be suggested in manganese toxicity, after careful investigation.
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Affiliation(s)
- Awanish Mishra
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research-Raebareli (NIPER-R), Bijnor-Sisendi Road, Sarojini Nagar, Near CRPF Base Camp, Lucknow (UP)- 226002. India
| | - Anjali Dahia
- Department of Biotechnology, Amity University, Jaipur. India
| | - Amit Jaiswal
- Department of Microbiology, Jiwaji University, Gwalior. India
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Ouyang Z, Yang B, Yi J, Zhu S, Lu S, Liu Y, Li Y, Li Y, Mehmood K, Hussain R, Ijaz M, Guo J, Tang Z, Li Y, Zhang H. Exposure to Fluoride induces apoptosis in liver of ducks by regulating Cyt-C/Caspase 3/9 signaling pathway. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 224:112662. [PMID: 34411823 DOI: 10.1016/j.ecoenv.2021.112662] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/10/2021] [Accepted: 08/14/2021] [Indexed: 06/13/2023]
Abstract
Fluorine being a well-known and essential element for normal physiological functions of tissues of different organisms is frequently used for growth and development of body. The mechanisms of adverse and injurious impacts of fluoride are not clear and still are under debate. Therefore, this study was executed to ascertain the potential mechanisms of sodium fluoride in liver tissues of ducks. For this purpose, a total of 14 ducks were randomly divided and kept in two groups including control group and sodium fluoride treated group. The ducks in control group were fed with normal diet while the ducks in other group were exposed to sodium fluoride (750 mg/kg) for 28 days. The results showed that exposure to sodium fluoride induced deleterious effects in different liver tissues of ducks. The results indicated that mRNA levels of Cas-3, Cas-9, p53, Apaf-1, Bax and Cyt-c were increased in treated ducks with significantly higher mRNA level of Cas-9 and lower levels of the mRNA level of Bcl-2 as compared to untreated control group (P < 0.01). The results showed that protein expression levels of Bax and p53 were increased while protein expression level of Bcl-2 was reduced in treated ducks. No difference was observed in protein expression level of Cas-3 between treated and untreated ducks. The results of this study suggest that sodium fluoride damages the normal structure of liver and induces abnormal process of apoptosis in hepatocyte, which provide a new idea for elucidating the mechanisms of sodium fluoride induced hepatotoxicity in ducks.
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Affiliation(s)
- Zhuanxu Ouyang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Bijing Yang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Jiangnan Yi
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Shanshan Zhu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Suge Lu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Yingwei Liu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Yangwei Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Yuanliang Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Khalid Mehmood
- Department of Clinical Medicine and Surgery, Faculty of Veterinary and Animal Sciences, The Islamia University of Bahawalpur, 63100, Pakistan
| | - Riaz Hussain
- Department of Pathology, Faculty of Veterinary and Animal Sciences, The Islamia University of Bahawalpur, 63100, Pakistan
| | - Muhammad Ijaz
- Department of Veterinary Medicine, University of Veterinary and Animal Sciences Lahore, 54000, Pakistan
| | - Jianying Guo
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Zhaoxin Tang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Ying Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
| | - Hui Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
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Faruk EM, Alasmari WA, Fouad H, Nafea OE, Hasan RAA. Extracellular vesicles derived from bone marrow mesenchymal stem cells repair functional and structural rat adrenal gland damage induced by fluoride. Life Sci 2021; 270:119122. [PMID: 33508294 DOI: 10.1016/j.lfs.2021.119122] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/10/2021] [Accepted: 01/18/2021] [Indexed: 02/07/2023]
Abstract
The adrenal glands have striking morpho-biochemical features that render them vulnerable to the effects of toxins. AIMS This study was conducted to explore the therapeutic utility of extracellular vesicles derived from bone marrow mesenchymal stem cells (BMSC-EVs) against fluoride-induced adrenal toxicity. MATERIALS AND METHODS The work included isolation and further identification of BMSC-EVs by transmission electron microscopy and flow cytometric analysis. Adrenal toxicity in rats was induced by oral administration of 300 ppm of sodium fluoride (NaF) in drinking water for 60 days followed by a single dose injection of BMSC-EVs. The effects of BMSC-EVs against NaF was evaluated by adrenal oxidant/antioxidant biomarkers, hormonal assay of plasma adrenocorticotrophic hormone (ACTH) and corticosterone (CORT) and mRNA gene expression quantitation for adrenal cortical steroidogenic pathway-encoding genes. Histopathological examination of the adrenal tissue was performed. KEY FINDINGS BMSC-EVs were effectively isolated and characterized. NaF exposure decreased adrenal superoxide dismutase and catalase activities, increased adrenal malondialdehyde levels, elevated plasma ACTH, diminished CORT concentrations and downregulated the adrenal cortical steroidogenic pathway-encoding genes. In addition, NaF-induced marked adrenal histopathological lesions. SIGNIFICANCE BMSC-EVs treatment repaired damaged adrenal tissue and recovered its function greatly following NaF consumption. BMSC-EVs reversed the toxic effects of NaF and reprogramed injured adrenal cells by activating regenerative processes.
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Affiliation(s)
- Eman Mohamed Faruk
- Department of Histology and Cell Biology, Faculty of Medicine, Benha University, Benha, Egypt
| | | | - Hanan Fouad
- Medical Biochemistry and Molecular Biology, Faculty of Medicine, Cairo University, Giza, Egypt
| | - Ola Elsayed Nafea
- Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Zagazig University, Zagazig, Egypt; Department of Clinical Pharmacy, College of Pharmacy, Taif University, Taif, Saudi Arabia.
| | - Rehab Abd Allah Hasan
- Department of Histology and Cell Biology, Faculty of Medicine for Girls (AFMG), Al-Azhar University, Cairo, Egypt
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