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DeMarino C, Denniss J, Cowen M, Norato G, Dietrich DK, Henderson L, Gollomp E, Snow J, Pandya D, Smith B, Nath A. HIV-1 RNA in extracellular vesicles is associated with neurocognitive outcomes. Nat Commun 2024; 15:4391. [PMID: 38782925 PMCID: PMC11116485 DOI: 10.1038/s41467-024-48644-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 05/08/2024] [Indexed: 05/25/2024] Open
Abstract
Human immunodeficiency virus type-1 (HIV-1) is responsible for significant mortality and morbidity worldwide. Despite complete control of viral replication with antiretrovirals, cells with integrated HIV-1 provirus can produce viral transcripts. In a cross-sectional study of 84 HIV+ individuals of whom 43 were followed longitudinally, we found that HIV-1 RNAs are present in extracellular vesicles (EVs) derived from cerebrospinal fluid and serum of all individuals. We used seven digital droplet polymerase chain reaction assays to evaluate the transcriptional status of the latent reservoir. EV-associated viral RNA was more abundant in the CSF and correlated with neurocognitive dysfunction in both, the cross-sectional and longitudinal studies. Sequencing studies suggested compartmentalization of defective viral transcripts in the serum and CSF. These findings suggest previous studies have underestimated the viral burden and there is a significant relationship between latent viral transcription and CNS complications of long-term disease despite the adequate use of antiretrovirals.
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Affiliation(s)
- Catherine DeMarino
- Section for Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Julia Denniss
- Section for Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Maria Cowen
- Section for Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Gina Norato
- Office of the Clinical Director, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Devon K Dietrich
- Section for Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Lisa Henderson
- Section for Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Elyse Gollomp
- Office of the Clinical Director, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
| | - Joseph Snow
- Office of the Clinical Director, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
| | - Darshan Pandya
- Section for Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Bryan Smith
- Section for Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Avindra Nath
- Section for Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.
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2
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González-May CA, Barradas-Castillo MDR, Perera-Rios JH, Gallegos-Tintoré S, Pérez-Izquierdo O, Aranda-González II. Dietary flavonoids may have a protective and therapeutic effect in Parkinson disease: A systematic review. Nutr Res 2024; 121:39-50. [PMID: 38039600 DOI: 10.1016/j.nutres.2023.10.004] [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: 10/26/2023] [Accepted: 10/27/2023] [Indexed: 12/03/2023]
Abstract
Parkinson disease (PD) is characterized by the loss of dopaminergic neurons because of oxidative stress and neuroinflammation. Polyphenols in vegetables, known for their high antioxidant capacity, may prevent the onset, or delay the progression of the disease; among these, flavonoids are the most abundant class of polyphenols in foods. Clinical and cohort studies have evaluated the effect of polyphenol consumption on the risk of developing PD or of attenuating the symptoms after diagnosis; therefore, it is necessary to integrate the scientific evidence into making dietary recommendations. The objective of this study was to perform a systematic review of randomized controlled trials and cohort studies that have investigated the use of polyphenols in PD. The studies were identified through the PubMed, Science Direct, Scielo, and Web of Science databases. A total of 1100 studies were found; these were analyzed and filtered by 2 independent reviewers. After completion, 5 studies were included (3 randomized controlled trials and 2 cohort studies). The consumption of flavonoids, anthocyanins, or 2-5 servings/week of specific foods (apples, red wine, blueberries, and strawberries) reduces the risk of PD and associated mortality. Treatment with licorice, curcumin, or cocoa, which are rich in flavonoids and other polyphenols, improves motor function in PD patients. No statistically significant differences were found in quality of life, disease progression or nonmotor symptoms such as cognitive ability and mood. Although cohort studies suggest a neuroprotective effect, further clinical studies are urgently needed to evaluate the effect of specific flavonoids and other polyphenols in PD.
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Affiliation(s)
| | | | | | - Santiago Gallegos-Tintoré
- Facultad de Ingeniería Química, Universidad Autónoma de Yucatán, Colonia Chuburná Hidalgo Inn, 97203, Mérida, Yucatán, México
| | - Odette Pérez-Izquierdo
- Facultad de Medicina, Universidad Autónoma de Yucatán, Centro, 97000, Mérida, Yucatán, México
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3
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Hofmann T, Makk ÁN, Albert L. Extraction of (+)-catechin from oak ( Quercus spp.) bark: Optimization of pretreatment and extraction conditions. Heliyon 2023; 9:e22024. [PMID: 38027666 PMCID: PMC10665808 DOI: 10.1016/j.heliyon.2023.e22024] [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: 08/04/2023] [Revised: 10/31/2023] [Accepted: 11/02/2023] [Indexed: 12/01/2023] Open
Abstract
Oaks (Quercus L., Fagaceae) are a widespread tree species worldwide, and in Hungary they account for nearly 30 % of the forests. Their wood is valuable, but their bark is considered as a by-product. Oak bark, available in large quantities but with no dedicated use, contains a significant amount of valuable extractives. Its (+)-catechin content is around 1 %. (+)-Catechin is mostly used for food industry, medicine and many other industrial purposes, representing a significant financial value. The aim of the present research was to compare the (+)-catechin concentrations in the bark of the most important oak species found in Hungary and to optimize sample pretreatment (conservation) and extraction methods in order to achieve fast and efficient extraction. From these species the highest concentrations were measured in Q. robur and Q. robur ssp. slavonica (8-12 mg (+)-catechin/g dry bark). The combination of microwave sample pretreatment and microwave assisted extraction proved to be the most time- and cost-effective method. The utilization of the extracted bark powder for energetic purposes requires further investigations.
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Affiliation(s)
- Tamás Hofmann
- University of Sopron, Institute of Environmental Protection and Nature Conservation, H-9400, Bajcsy-Zsilinszky Str. 4, Sopron, Hungary
| | - Ádám Nándor Makk
- DMRV Zrt., Division of Environmental and Water Quality Protection, H-2600, Kodály Zoltán Str. 3, Vác, Hungary
| | - Levente Albert
- University of Sopron, Institute of Environmental Protection and Nature Conservation, H-9400, Bajcsy-Zsilinszky Str. 4, Sopron, Hungary
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4
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Rani A, Saini V, Patra P, Prashar T, Pandey RK, Mishra A, Jha HC. Epigallocatechin Gallate: A Multifaceted Molecule for Neurological Disorders and Neurotropic Viral Infections. ACS Chem Neurosci 2023; 14:2968-2980. [PMID: 37590965 DOI: 10.1021/acschemneuro.3c00368] [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] [Indexed: 08/19/2023] Open
Abstract
Epigallocatechin-3-gallate (EGCG), a polyphenolic moiety found in green tea extracts, exhibits pleiotropic bioactivities to combat many diseases including neurological ailments. These neurological diseases include Alzheimer's disease, multiple sclerosis, Parkinson's disease, Huntington's disease, and amyotrophic lateral sclerosis. For instance, in the case of Alzheimer's disease, the formation of a β-sheet in the region of the 10th-21st amino acids was significantly reduced in EGCG-induced oligomeric samples of Aβ40. Its interference induces the formation of Aβ structures with an increase in intercenter-of-mass distances, reduction in interchain/intrachain contacts, reduction in β-sheet propensity, and increase in α-helix. Besides, numerous neurotropic viruses are known to instigate or aggravate neurological ailments. It exerts an effect on the oxidative damage caused in neurodegenerative disorders by acting on GSK3-β, PI3K/Akt, and downstream signaling pathways via caspase-3 and cytochrome-c. EGCG also diminishes these viral-mediated effects, such as EGCG delayed HSV-1 infection by blocking the entry for virions, inhibitory effects on NS3/4A protease or NS5B polymerase of HCV and potent inhibitor of ZIKV NS2B-NS3pro/NS3 serine protease (NS3-SP). It showed a reduction in the neurotoxic properties of HIV-gp120 and Tat in the presence of IFN-γ. EGCG also involves numerous viral-mediated inflammatory cascades, such as JAK/STAT. Nonetheless, it also inhibits the Epstein-Barr virus replication protein (Zta and Rta). Moreover, it also impedes certain viruses (influenza A and B strains) by hijacking the endosomal and lysosomal compartments. Therefore, the current article aims to describe the importance of EGCG in numerous neurological diseases and its inhibitory effect against neurotropic viruses.
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Affiliation(s)
- Annu Rani
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Simrol, 453552, Indore India
| | - Vaishali Saini
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Simrol, 453552, Indore India
| | - Priyanka Patra
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Simrol, 453552, Indore India
| | - Tanish Prashar
- School of Biosciences and Technology, Vellore Institute of Technology, Vellore, 632014, Tamil Nadu India
| | - Rajan Kumar Pandey
- Department of Medical Biochemistry and Biophysics, Karolinska Institute, 17177 Stockholm, Sweden
| | - Amit Mishra
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Karwar, 342030, Jodhpur India
| | - Hem Chandra Jha
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Simrol, 453552, Indore India
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5
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Steiner JP, Bachani M, Malik N, Li W, Tyagi R, Sampson K, Abrams RPM, Kousa Y, Solis J, Johnson TP, Nath A. Neurotoxic properties of the Zika virus envelope protein. Exp Neurol 2023; 367:114469. [PMID: 37327963 PMCID: PMC10527427 DOI: 10.1016/j.expneurol.2023.114469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/31/2023] [Accepted: 06/11/2023] [Indexed: 06/18/2023]
Abstract
Prenatal Zika virus (ZIKV) infection is a serious global concern as it can lead to brain injury and many serious birth defects, collectively known as congenital Zika syndrome. Brain injury likely results from viral mediated toxicity in neural progenitor cells. Additionally, postnatal ZIKV infections have been linked to neurological complications, yet the mechanisms driving these manifestations are not well understood. Existing data suggest that the ZIKV envelope protein can persist in the central nervous system for extended periods of time, but it is unknown if this protein can independently contribute to neuronal toxicity. Here we find that the ZIKV envelope protein is neurotoxic, leading to overexpression of poly adenosine diphosphate -ribose polymerase 1, which can induce parthanatos. Together, these data suggest that neuronal toxicity resulting from the envelope protein may contribute to the pathogenesis of post-natal ZIKV-related neurologic complications.
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Affiliation(s)
- Joseph P Steiner
- Translational Neuroscience Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States of America
| | - Muznabanu Bachani
- Translational Neuroscience Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States of America
| | - Nasir Malik
- Translational Neuroscience Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States of America
| | - Wenxue Li
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States of America
| | - Richa Tyagi
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States of America
| | - Kevon Sampson
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States of America
| | - Rachel P M Abrams
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States of America
| | - Youssef Kousa
- Division of Neurology, Children's National Hospital, Washington, DC 20010, USA; Department of Genomics and Precision Medicine, School of Medicine and Health Sciences, The George Washington University, Washington, DC 20052, USA
| | - Jamie Solis
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States of America
| | - Tory P Johnson
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States of America
| | - Avindra Nath
- Translational Neuroscience Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States of America; Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States of America.
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6
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Chen Y, Liu Z, Gong Y. Neuron-immunity communication: mechanism of neuroprotective effects in EGCG. Crit Rev Food Sci Nutr 2023:1-20. [PMID: 37216484 DOI: 10.1080/10408398.2023.2212069] [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: 05/24/2023]
Abstract
Epigallocatechin gallate (EGCG), a naturally occurring active ingredient unique to tea, has been shown to have neuroprotective potential. There is growing evidence of its potential advantages in the prevention and treatment of neuroinflammation, neurodegenerative diseases, and neurological damage. Neuroimmune communication is an important physiological mechanism in neurological diseases, including immune cell activation and response, cytokine delivery. EGCG shows great neuroprotective potential by modulating signals related to autoimmune response and improving communication between the nervous system and the immune system, effectively reducing the inflammatory state and neurological function. During neuroimmune communication, EGCG promotes the secretion of neurotrophic factors into the repair of damaged neurons, improves intestinal microenvironmental homeostasis, and ameliorates pathological phenotypes through molecular and cellular mechanisms related to the brain-gut axis. Here, we discuss the molecular and cellular mechanisms of inflammatory signaling exchange involving neuroimmune communication. We further emphasize that the neuroprotective role of EGCG is dependent on the modulatory role between immunity and neurology in neurologically related diseases.
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Affiliation(s)
- Ying Chen
- Key Laboratory of Tea Science of Ministry of Educatioxn, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha, China
| | - Zhonghua Liu
- Key Laboratory of Tea Science of Ministry of Educatioxn, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Changsha, China
- Key Laboratory for Evaluation and Utilization of Gene Resources of Horticultural Crops, Ministry of Agriculture and Rural Affairs of China, Hunan Agricultural University, Changsha, China
| | - Yushun Gong
- Key Laboratory of Tea Science of Ministry of Educatioxn, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha, China
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7
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Manosso LM, Arent CO, Borba LA, Abelaira HM, Réus GZ. Natural Phytochemicals for the Treatment of Major Depressive Disorder: A Mini-Review of Pre- and Clinical Studies. CNS & NEUROLOGICAL DISORDERS DRUG TARGETS 2023; 22:237-254. [PMID: 35352639 DOI: 10.2174/1570159x20666220329143804] [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: 11/24/2021] [Revised: 02/03/2022] [Accepted: 02/10/2022] [Indexed: 12/16/2022]
Abstract
Major Depressive Disorder (MDD) is a common mental illness that causes significant disability and declining quality of life. An overlap of multiple factors can be involved in the pathophysiology of this mood disorder, including increased inflammation and oxidative stress, change in neurotransmitters, decreased brain-derived neurotrophic factor (BDNF), activation of the hypothalamicpituitary- adrenal (HPA) axis, and changes in the microbiota-gut-brain axis. Although the classic treatment for MDD is safe, it is far from ideal, with delay to start the best clinic, side effects, and a large number of non-responses or partial-responses. Therefore, other alternatives are being studied to improve depressive symptoms, and, among them, the role of phytochemicals in food stands out. This mini-review will discuss the main phytochemicals present in foods with clinical and preclinical studies showing benefits for MDD treatment. In addition, the main mechanisms of action that are being proposed for each of these compounds will be addressed.
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Affiliation(s)
- Luana M Manosso
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | - Camila O Arent
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | - Laura A Borba
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | - Helena M Abelaira
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | - Gislaine Z Réus
- Translational Psychiatry Laboratory, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
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8
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Chen B, Zhang W, Lin C, Zhang L. A Comprehensive Review on Beneficial Effects of Catechins on Secondary Mitochondrial Diseases. Int J Mol Sci 2022; 23:ijms231911569. [PMID: 36232871 PMCID: PMC9569714 DOI: 10.3390/ijms231911569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 09/13/2022] [Accepted: 09/21/2022] [Indexed: 11/16/2022] Open
Abstract
Mitochondria are the main sites for oxidative phosphorylation and synthesis of adenosine triphosphate in cells, and are known as cellular power factories. The phrase "secondary mitochondrial diseases" essentially refers to any abnormal mitochondrial function other than primary mitochondrial diseases, i.e., the process caused by the genes encoding the electron transport chain (ETC) proteins directly or impacting the production of the machinery needed for ETC. Mitochondrial diseases can cause adenosine triphosphate (ATP) synthesis disorder, an increase in oxygen free radicals, and intracellular redox imbalance. It can also induce apoptosis and, eventually, multi-system damage, which leads to neurodegenerative disease. The catechin compounds rich in tea have attracted much attention due to their effective antioxidant activity. Catechins, especially acetylated catechins such as epicatechin gallate (ECG) and epigallocatechin gallate (EGCG), are able to protect mitochondria from reactive oxygen species. This review focuses on the role of catechins in regulating cell homeostasis, in which catechins act as a free radical scavenger and metal ion chelator, their protective mechanism on mitochondria, and the protective effect of catechins on mitochondrial deoxyribonucleic acid (DNA). This review highlights catechins and their effects on mitochondrial functional metabolic networks: regulating mitochondrial function and biogenesis, improving insulin resistance, regulating intracellular calcium homeostasis, and regulating epigenetic processes. Finally, the indirect beneficial effects of catechins on mitochondrial diseases are also illustrated by the warburg and the apoptosis effect. Some possible mechanisms are shown graphically. In addition, the bioavailability of catechins and peracetylated-catechins, free radical scavenging activity, mitochondrial activation ability of the high-molecular-weight polyphenol, and the mitochondrial activation factor were also discussed.
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9
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Toodle V, Lee MH, Bachani M, Ruffin A, Vivekanandhan S, Malik N, Wang T, Johnson TP, Nath A, Steiner JP. Fluconazole Is Neuroprotective via Interactions with the IGF-1 Receptor. Neurotherapeutics 2022; 19:1313-1328. [PMID: 35831747 PMCID: PMC9587198 DOI: 10.1007/s13311-022-01265-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/12/2022] [Indexed: 10/17/2022] Open
Abstract
There is a continuing unmet medical need to develop neuroprotective strategies to treat neurodegenerative disorders. To address this need, we screened over 2000 compounds for potential neuroprotective activity in a model of oxidative stress and found that numerous antifungal agents were neuroprotective. Of the identified compounds, fluconazole was further characterized. Fluconazole was able to prevent neurite retraction and cell death in in vitro and in vivo models of toxicity. Fluconazole protected neurons in a concentration-dependent manner and exhibited efficacy against several toxic agents, including 3-nitropropionic acid, N-methyl D-aspartate, 6-hydroxydopamine, and the HIV proteins Tat and gp120. In vivo studies indicated that systemically administered fluconazole was neuroprotective in animals treated with 3-nitropropionic acid and prevented gp120-mediated neuronal loss. In addition to neuroprotection, fluconazole also induced proliferation of neural progenitor cells in vitro and in vivo. Fluconazole mediates these effects through upregulation and signaling via the insulin growth factor-1 receptor which results in decreased cAMP production and increased phosphorylation of Akt. Blockade of the insulin growth factor-1 receptor signaling with the selective inhibitor AG1024 abrogated the effects of fluconazole. Our studies suggest that fluconazole may be an attractive candidate for treatment of neurodegenerative diseases due to its protective properties against several categories of neuronal insults and its ability to spur neural progenitor cell proliferation.
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Affiliation(s)
- Valerie Toodle
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Room 7C-103; Bldg. 10, 10 Center Drive, Bethesda, MD, 20892, USA
| | - Myoung-Hwa Lee
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Room 7C-103; Bldg. 10, 10 Center Drive, Bethesda, MD, 20892, USA
| | - Muzna Bachani
- Translational Neuroscience Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Room 7C-105; Bldg. 10, 10 Center Drive, Bethesda, MD, 20892, USA
| | - April Ruffin
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Room 7C-103; Bldg. 10, 10 Center Drive, Bethesda, MD, 20892, USA
| | - Sneha Vivekanandhan
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Room 7C-103; Bldg. 10, 10 Center Drive, Bethesda, MD, 20892, USA
| | - Nasir Malik
- Translational Neuroscience Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Room 7C-105; Bldg. 10, 10 Center Drive, Bethesda, MD, 20892, USA
| | - Tongguang Wang
- Translational Neuroscience Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Room 7C-105; Bldg. 10, 10 Center Drive, Bethesda, MD, 20892, USA
| | - Tory P Johnson
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Room 7C-103; Bldg. 10, 10 Center Drive, Bethesda, MD, 20892, USA
| | - Avindra Nath
- Section of Infections of the Nervous System, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Room 7C-103; Bldg. 10, 10 Center Drive, Bethesda, MD, 20892, USA.
- Translational Neuroscience Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Room 7C-105; Bldg. 10, 10 Center Drive, Bethesda, MD, 20892, USA.
| | - Joseph P Steiner
- Translational Neuroscience Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Room 7C-105; Bldg. 10, 10 Center Drive, Bethesda, MD, 20892, USA.
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10
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Nutraceuticals in HIV and COVID-19-Related Neurological Complications: Opportunity to Use Extracellular Vesicles as Drug Delivery Modality. BIOLOGY 2022; 11:biology11020177. [PMID: 35205044 PMCID: PMC8869385 DOI: 10.3390/biology11020177] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/20/2022] [Accepted: 01/20/2022] [Indexed: 12/03/2022]
Abstract
Simple Summary In this review, we discuss the potential use of extracellular vesicles (EVs) to deliver dietary supplements to the brain to reduce brain complications associated with HIV, COVID-19, and other brain disorders. Brain-related complications affect people with HIV and COVID-19 alike. Moreover, since HIV patients are at a higher risk of contracting COVID-19, their neurological problems can be exacerbated by COVID-19. The use of dietary supplements together with available treatment options has been shown to reduce the severity of infections. However, these treatments are not chemically compatible with the body’s blood–brain barrier defense mechanism. Therefore, a viable delivery method is needed to deliver drugs and nutraceuticals to the brain in HIV and COVID-19 comorbid patients. Abstract People living with HIV/AIDS (PLWHA) are at an increased risk of severe and critical COVID-19 infection. There is a steady increase in neurological complications associated with COVID-19 infection, exacerbating HIV-associated neurocognitive disorders (HAND) in PLWHA. Nutraceuticals, such as phytochemicals from medicinal plants and dietary supplements, have been used as adjunct therapies for many disease conditions, including viral infections. Appropriate use of these adjunct therapies with antiviral proprieties may be beneficial in treating and/or prophylaxis of neurological complications associated with these co-infections. However, most of these nutraceuticals have poor bioavailability and cannot cross the blood–brain barrier (BBB). To overcome this challenge, extracellular vesicles (EVs), biological nanovesicles, can be used. Due to their intrinsic features of biocompatibility, stability, and their ability to cross BBB, as well as inherent homing capabilities, EVs hold immense promise for therapeutic drug delivery to the brain. Therefore, in this review, we summarize the potential role of different nutraceuticals in reducing HIV- and COVID-19-associated neurological complications and the use of EVs as nutraceutical/drug delivery vehicles to treat HIV, COVID-19, and other brain disorders.
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Campbell LA, Mocchetti I. Extracellular Vesicles and HIV-Associated Neurocognitive Disorders: Implications in Neuropathogenesis and Disease Diagnosis. Neurotox Res 2021; 39:2098-2107. [PMID: 34618322 DOI: 10.1007/s12640-021-00425-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/13/2021] [Accepted: 09/28/2021] [Indexed: 01/08/2023]
Abstract
Extracellular vesicles are heterogeneous cell-derived membranous structures of nanometer size that carry diverse cargoes including nucleic acids, proteins, and lipids. Their secretion into the extracellular space and delivery of their cargo to recipient cells can alter cellular function and intracellular communication. In this review, we summarize the role of extracellular vesicles in the disease pathogenesis of HIV-associated neurocognitive disorder (HAND) by focusing on their role in viral entry, neuroinflammation, and neuronal degeneration. We also discuss the potential role of extracellular vesicles as biomarkers of HAND. Together, this review aims to convey the importance of extracellular vesicles in the pathogenesis of HAND and foster interest in their role in neuroinflammatory diseases.
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Affiliation(s)
- Lee A Campbell
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Medical Center, EP09 Research Building, 3970 Reservoir Rd, NW, Washington, DC, 20057, USA
| | - Italo Mocchetti
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Medical Center, EP09 Research Building, 3970 Reservoir Rd, NW, Washington, DC, 20057, USA.
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12
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Sunil MA, Sunitha VS, Santhakumaran P, Mohan MC, Jose MS, Radhakrishnan EK, Mathew J. Protective effect of (+)-catechin against lipopolysaccharide-induced inflammatory response in RAW 264.7 cells through downregulation of NF-κB and p38 MAPK. Inflammopharmacology 2021; 29:1139-1155. [PMID: 34115226 DOI: 10.1007/s10787-021-00827-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 05/29/2021] [Indexed: 12/26/2022]
Abstract
Catechin, a flavonol belonging to the flavonoid group of polyphenols is present in many plant foods. The present study was done to evaluate the effect of catechin on various inflammatory mediators using lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages. The effect of catechin on total cyclooxygenase (COX) activity, 5-lipoxygenase (5-LOX), myeloperoxidase, nitrite and inducible nitric oxide synthase (iNOS) level, secretion of tumor necrosis factor-α (TNF-α) and interleukin-10 (IL-10) were assessed in LPS-stimulated RAW 264.7 cells. The expression of COX-2, iNOS, TNF-α, nuclear factor-ĸB (NF-κB) and p38 mitogen-activated protein kinase (MAPK) genes were also investigated. The effect was further analyzed using human PBMCs by assessing the level of TNF-α and IL-10. The study demonstrated that the inflammatory mediators such as COX, 5-LOX, nitrite, iNOS, and TNF-α were significantly inhibited by catechin in a concentration-dependent manner whereas IL-10 production was up-regulated in RAW 264.7 cells. Moreover, catechin down-regulated the mRNA level expression of COX-2, iNOS, TNF-α, NF-κB and p38 MAPK. The current study ratifies the beneficial effect of catechin as a dietary component in plant foods to provide protection against inflammatory diseases.
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Affiliation(s)
- M A Sunil
- School of Biosciences, Mahatma Gandhi University Kottayam, Kerala, 686560, India
| | - V S Sunitha
- School of Biosciences, Mahatma Gandhi University Kottayam, Kerala, 686560, India
| | | | - Mohind C Mohan
- School of Biosciences, Mahatma Gandhi University Kottayam, Kerala, 686560, India
| | | | - E K Radhakrishnan
- School of Biosciences, Mahatma Gandhi University Kottayam, Kerala, 686560, India
| | - Jyothis Mathew
- School of Biosciences, Mahatma Gandhi University Kottayam, Kerala, 686560, India.
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Qureshi MY, Patterson MC, Clark V, Johnson JN, Moutvic MA, Driscoll SW, Kemppainen JL, Huston J, Anderson JR, Badley AD, Tebben PJ, Wackel P, Oglesbee D, Glockner J, Schreiner G, Dugar S, Touchette JC, Gavrilova RH. Safety and efficacy of (+)-epicatechin in subjects with Friedreich's ataxia: A phase II, open-label, prospective study. J Inherit Metab Dis 2021; 44:502-514. [PMID: 32677106 DOI: 10.1002/jimd.12285] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/23/2020] [Accepted: 07/13/2020] [Indexed: 02/02/2023]
Abstract
BACKGROUND (+)-Epicatechin (EPI) induces mitochondrial biogenesis and antioxidant metabolism in muscle fibers and neurons. We aimed to evaluate safety and efficacy of (+)-EPI in pediatric subjects with Friedreich's ataxia (FRDA). METHODS This was a phase II, open-label, baseline-controlled single-center trial including 10 participants ages 10 to 22 with confirmed FA diagnosis. (+)-EPI was administered orally at 75 mg/d for 24 weeks, with escalation to 150 mg/d at 12 weeks for subjects not showing improvement of neuromuscular, neurological or cardiac endpoints. Neurological endpoints were change from baseline in Friedreich's Ataxia Rating Scale (FARS) and 8-m timed walk. Cardiac endpoints were changes from baseline in left ventricular (LV) structure and function by cardiac magnetic resonance imaging (MRI) and echocardiogram, changes in cardiac electrophysiology, and changes in biomarkers for heart failure and hypertrophy. RESULTS Mean FARS/modified (m)FARS scores showed nonstatistically significant improvement by both group and individual analysis. FARS/mFARS scores improved in 5/9 subjects (56%), 8-m walk in 3/9 (33%), 9-peg hole test in 6/10 (60%). LV mass index by cardiac MRI was significantly reduced at 12 weeks (P = .045), and was improved in 7/10 (70%) subjects at 24 weeks. Mean LV ejection fraction was increased at 24 weeks (P = .008) compared to baseline. Mean maximal septal thickness by echocardiography was increased at 24 weeks (P = .031). There were no serious adverse events. CONCLUSION (+)-EPI was well tolerated over 24 weeks at up to 150 mg/d. Improvement was observed in cardiac structure and function in subset of subjects with FRDA without statistically significant improvement in primary neurological outcomes. SYNOPSIS A (+)-epicatechin showed improvement of cardiac function, nonsignificant reduction of FARS/mFARS scores, and sustained significant upregulation of muscle-regeneration biomarker follistatin.
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Affiliation(s)
- Muhammad Yasir Qureshi
- Department of Pediatrics, Mayo Clinic, Rochester, Minnesota, USA
- Division of Pediatric Cardiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Marc C Patterson
- Department of Pediatrics, Mayo Clinic, Rochester, Minnesota, USA
- Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | - Vicki Clark
- Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Jonathan N Johnson
- Department of Pediatrics, Mayo Clinic, Rochester, Minnesota, USA
- Division of Pediatric Cardiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Margaret A Moutvic
- Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, Minnesota, USA
| | - Sherilyn W Driscoll
- Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, Minnesota, USA
| | | | - John Huston
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Jeff R Anderson
- Office of Translation to Practice, Mayo Clinic, Rochester, Minnesota, USA
| | - Andrew D Badley
- Division of Infectious Diseases, Mayo Clinic, Rochester, Minnesota, USA
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Peter J Tebben
- Division of Endocrinology, Mayo Clinic, Rochester, Minnesota, USA
| | - Philip Wackel
- Department of Pediatrics, Mayo Clinic, Rochester, Minnesota, USA
- Division of Pediatric Cardiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Devin Oglesbee
- Department of Pathology and Laboratory Medicine, Rochester, Minnesota, USA
| | - James Glockner
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | | | | | | | - Ralitza H Gavrilova
- Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
- Department of Clinical Genomics, Mayo Clinic, Rochester, Minnesota, USA
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14
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do Valle IF, Roweth HG, Malloy MW, Moco S, Barron D, Battinelli E, Loscalzo J, Barabási AL. Network medicine framework shows that proximity of polyphenol targets and disease proteins predicts therapeutic effects of polyphenols. NATURE FOOD 2021; 2:143-155. [PMID: 37117448 DOI: 10.1038/s43016-021-00243-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 02/16/2021] [Indexed: 04/30/2023]
Abstract
Polyphenols, natural products present in plant-based foods, play a protective role against several complex diseases through their antioxidant activity and by diverse molecular mechanisms. Here we develop a network medicine framework to uncover mechanisms for the effects of polyphenols on health by considering the molecular interactions between polyphenol protein targets and proteins associated with diseases. We find that the protein targets of polyphenols cluster in specific neighbourhoods of the human interactome, whose network proximity to disease proteins is predictive of the molecule's known therapeutic effects. The methodology recovers known associations, such as the effect of epigallocatechin-3-O-gallate on type 2 diabetes, and predicts that rosmarinic acid has a direct impact on platelet function, representing a novel mechanism through which it could affect cardiovascular health. We experimentally confirm that rosmarinic acid inhibits platelet aggregation and α-granule secretion through inhibition of protein tyrosine phosphorylation, offering direct support for the predicted molecular mechanism. Our framework represents a starting point for mechanistic interpretation of the health effects underlying food-related compounds, allowing us to integrate into a predictive framework knowledge on food metabolism, bioavailability and drug interaction.
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Affiliation(s)
- Italo F do Valle
- Network Science Institute and Department of Physics, Northeastern University, Boston, MA, USA
| | - Harvey G Roweth
- Division of Hematology, Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Michael W Malloy
- Division of Hematology, Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Sofia Moco
- Nestlé Institute of Health Sciences, Lausanne, Switzerland
| | - Denis Barron
- Nestlé Institute of Health Sciences, Lausanne, Switzerland
| | - Elisabeth Battinelli
- Division of Hematology, Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Joseph Loscalzo
- Harvard Medical School, Boston, MA, USA
- Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA
| | - Albert-László Barabási
- Network Science Institute and Department of Physics, Northeastern University, Boston, MA, USA.
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
- Department of Network and Data Science, Central European University, Budapest, Hungary.
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15
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Wang X, Dong W, Zhang X, Zhu Z, Chen Y, Liu X, Guo C. Antiviral Mechanism of Tea Polyphenols against Porcine Reproductive and Respiratory Syndrome Virus. Pathogens 2021; 10:pathogens10020202. [PMID: 33668502 PMCID: PMC7917843 DOI: 10.3390/pathogens10020202] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/07/2021] [Accepted: 02/10/2021] [Indexed: 02/07/2023] Open
Abstract
Neither inactivated nor attenuated vaccines can effectively prevent and control the infection and spread of porcine reproductive and respiratory syndrome virus (PRRSV). Therefore, it is necessary to broaden new horizons and to conceive effective preventive strategies. The main components of Tea polyphenol (TPP) are catechins and their derivatives. TPP has many physiological activities and has certain antiviral and antifungal effects. However, whether TPP shows anti-PRRSV activity remains unclear. We found that TPP effectively inhibited PRRSV infection in Marc-145 cells by suppressing the stages of viral attachment, internalization, replication, and release. TPP exhibited a potent anti-PRRSV effect regardless of pre-treatment or post-treatment. In addition, we demonstrated that TPP restrained PRRSV-induced p65 entry into the nucleus to suppress the activation of the NF-κB signaling pathway, which ultimately leads to the inhibition of the expression of inflammatory cytokines. Furthermore, TPP limited the synthesis of viral non-structural protein 2 (nsp2), the core component of viral replication transcription complexes, which may contribute to the inhibition of viral RNA replication. TPP has the potential to develop into an effective antiviral agent for PRRSV prevention and control in the future.
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16
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Li C, Wang C. Eriodictyol corrects functional recovery and myelin loss in SCI rats. Transl Neurosci 2020; 11:439-446. [PMID: 33680506 PMCID: PMC7917365 DOI: 10.1515/tnsci-2020-0128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 06/05/2020] [Accepted: 06/16/2021] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND This study investigated the therapeutic potential of eriodictyol (EDC) in spinal cord injury (SCI) rats and also the mechanism involved. METHODS The SCI model was created in Sprague-Dawley rats by the weight drop method. The SCI rats were divided into four groups, namely, Sham operated group (submitted for laminectomy only), control rats (vehicle treated), rats treated with 10 mg/kg EDC and rats treated with 20 mg/kg EDC. EDC or vehicle was injected in The SCI rats via subarachnoid route at the lumbar level 4 just after inducing SCI. The open field and inclined plane tests were done for assessing the locomotor activity. Histopathological analysis of the injured site of the spinal cord was done. Western blot analysis and immunohistochemical analysis were done for the expression of Bcl-2, Bax, glial cell line-derived neurotrophic factor (GCDNF) and brain-derived neurotrophic factor (BDNF). RESULTS The outcomes suggested that EDC-treated rats showed significant improvement in the locomotor activity and also exhibited low myelin loss. The rats also showed overexpression of Bcl-2 and Bax. The treatment of EDC also increased the levels of GCDNF and BDNF after SCI. These outcomes suggested that EDC exerted the neuroprotective effect and also improved the locomotor activity by improving the levels of GCDNF and BDNF and blocking the apoptosis-related proteins. CONCLUSION This study suggests that EDC could ameliorate the locomotor function, and the neuroprotective action may be attributed to modulation of GCDNF and BDNF and blockade of apoptosis-associated proteins.
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Affiliation(s)
- Chenggang Li
- Department of Orthopaedics, Second Hospital Shanxi Medical University, Taiyuan, Shanxi, 030001, China
| | - Chunfang Wang
- Laboratory Animal Center, Shanxi Medical University, Taiyuan, Shanxi, 030001, China
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17
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Sénécal V, Barat C, Tremblay MJ. The delicate balance between neurotoxicity and neuroprotection in the context of HIV-1 infection. Glia 2020; 69:255-280. [PMID: 32910482 DOI: 10.1002/glia.23904] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 08/15/2020] [Accepted: 08/16/2020] [Indexed: 12/17/2022]
Abstract
Human immunodeficiency virus type-1 (HIV-1) causes a spectrum of neurological impairments, termed HIV-associated neurocognitive disorder (HAND), following the infiltration of infected cells into the brain. Even though the implementation of antiretroviral therapy reduced the systemic viral load, the prevalence of HAND remains unchanged and infected patients develop persisting neurological disturbances affecting their quality of life. As a result, HAND have gained importance in basic and clinical researches, warranting the need of developing new adjunctive treatments. Nonetheless, a better understanding of the molecular and cellular mechanisms remains necessary. Several studies consolidated their efforts into elucidating the neurotoxic signaling leading to HAND including the deleterious actions of HIV-1 viral proteins and inflammatory mediators. However, the scope of these studies is not sufficient to address all the complexity related to HAND development. Fewer studies focused on an altered neuroprotective capacity of the brain to respond to HIV-1 infection. Neurotrophic factors are endogenous polyproteins involved in neuronal survival, synaptic plasticity, and neurogenesis. Any defects in the processing or production of these crucial factors might compose a risk factor rendering the brain more vulnerable to neuronal damages. Due to their essential roles, they have been investigated for their diverse interplays with HIV-1 infection. In this review, we present a complete description of the neurotrophic factors involved in HAND. We discuss emerging concepts for their therapeutic applications and summarize the complex mechanisms that down-regulate their production in favor of a neurotoxic environment. For certain factors, we finally address opposing roles that rather lead to increased inflammation.
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Affiliation(s)
- Vincent Sénécal
- Axe des Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Pavillon CHUL, Québec, Quebec, Canada
| | - Corinne Barat
- Axe des Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Pavillon CHUL, Québec, Quebec, Canada
| | - Michel J Tremblay
- Axe des Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Pavillon CHUL, Québec, Quebec, Canada.,Département de Microbiologie-infectiologie et immunologie, Faculté de Médecine, Université Laval, Québec, Quebec, Canada
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18
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Youn K, Jun M. Geraniin Protects PC12 Cells Against Aβ 25-35-Mediated Neuronal Damage: Involvement of NF-κB and MAPK Signaling Pathways. J Med Food 2020; 23:928-937. [PMID: 32744877 DOI: 10.1089/jmf.2019.4613] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
β-amyloid peptide (Aβ) has been considered a critical factor that is associated with the development of oxidative stress and neuroinflammation in the pathogenesis of Alzheimer's disease. This study was performed to evaluate the effect of geraniin on Aβ25-35-caused oxidative damage and neuroinflammatory response, and its underlying mechanism. Geraniin protected pheochromocytoma12 (PC12) cells from Aβ25-35-mediated cell death by reducing oxidative stress and restoring cell cycle dysregulation. Moreover, geraniin markedly attenuated Aβ-triggered DNA injury that was partially associated with decreases in caspase-3 activity. Moreover, the compound significantly downregulated the release of neuroinflammatory factors. Upregulation of nuclear factor-κB activity was suppressed by geraniin, which was due to suppression of JNK, ERK1/2, and the p38 mitogen-activated protein kinase (MAPK) pathway. This was the first study to support further understanding of geraniin as a promising agent against neurotoxicity in the reduction of oxidative stress and neuroinflammation.
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Affiliation(s)
- Kumju Youn
- Department of Food Science and Nutrition, College of Health Sciences, Dong-A University, Busan, Korea
| | - Mira Jun
- Department of Food Science and Nutrition, College of Health Sciences, Dong-A University, Busan, Korea.,Brain Busan 21 Plus Program, Center for Silver-Targeted Biomaterials, Graduate School, Dong-A University, Busan, Korea
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19
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Michael H, Mpofana T, Ramlall S, Oosthuizen F. The Role of Brain Derived Neurotrophic Factor in HIV-Associated Neurocognitive Disorder: From the Bench-Top to the Bedside. Neuropsychiatr Dis Treat 2020; 16:355-367. [PMID: 32099373 PMCID: PMC6999762 DOI: 10.2147/ndt.s232836] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Accepted: 11/21/2019] [Indexed: 12/11/2022] Open
Abstract
Human immunodeficiency virus (HIV)-associated neurocognitive disorder (HAND) remains prevalent in the anti-retroviral (ART) era. While there is a complex interplay of many factors in the neuropathogenesis of HAND, decreased neurotrophic synthesis has been shown to contribute to synaptic degeneration which is a hallmark of HAND neuropathology. Brain derived neurotrophic factor (BDNF) is the most abundant and synaptic-promoting neurotrophic factor in the brain and plays a critical role in both learning and memory. Reduced BDNF levels can worsen neurocognitive impairment in HIV-positive individuals across several domains. In this paper, we review the evidence from pre-clinical and clinical studies showing the neuroprotective roles of BDNF against viral proteins, effect on co-morbid mental health disorders, altered human microbiome and ART in HAND management. Potential applications of BDNF modulation in pharmacotherapeutic, cognitive and behavioral interventions in HAND are also discussed. Finally, research gaps and future research direction are identified with the aim of helping researchers to direct efforts to make these BDNF driven interventions improve the quality of life of patients living with HAND.
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Affiliation(s)
- Henry Michael
- Discipline of Pharmaceutical Sciences, School of Health Science, University of KwaZulu-Natal, Durban, South Africa
| | - Thabisile Mpofana
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Suvira Ramlall
- Department of Psychiatry, University of KwaZulu-Natal, Durban, South Africa
| | - Frasia Oosthuizen
- Discipline of Pharmaceutical Sciences, School of Health Science, University of KwaZulu-Natal, Durban, South Africa
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20
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Rothenberg DO, Zhang L. Mechanisms Underlying the Anti-Depressive Effects of Regular Tea Consumption. Nutrients 2019; 11:nu11061361. [PMID: 31212946 PMCID: PMC6627400 DOI: 10.3390/nu11061361] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 06/03/2019] [Accepted: 06/11/2019] [Indexed: 12/19/2022] Open
Abstract
This article is a comprehensive review of the literature pertaining to the antidepressant effects and mechanisms of regular tea consumption. Meta-data supplemented with recent observational studies were first analyzed to assess the association between tea consumption and depression risk. The literature reported risk ratios (RR) were 0.69 with 95% confidence intervals of 0.62–0.77. Next, we thoroughly reviewed human trials, mouse models, and in vitro experiments to determine the predominant mechanisms underlying the observed linear relationship between tea consumption and reduced risk of depression. Current theories on the neurobiology of depression were utilized to map tea-mediated mechanisms of antidepressant activity onto an integrated framework of depression pathology. The major nodes within the network framework of depression included hypothalamic-pituitary-adrenal (HPA) axis hyperactivity, inflammation, weakened monoaminergic systems, reduced neurogenesis/neuroplasticity, and poor microbiome diversity affecting the gut–brain axis. We detailed how each node has subsystems within them, including signaling pathways, specific target proteins, or transporters that interface with compounds in tea, mediating their antidepressant effects. A major pathway was found to be the ERK/CREB/BDNF signaling pathway, up-regulated by a number of compounds in tea including teasaponin, L-theanine, EGCG and combinations of tea catechins and their metabolites. Black tea theaflavins and EGCG are potent anti-inflammatory agents via down-regulation of NF-κB signaling. Multiple compounds in tea are effective modulators of dopaminergic activity and the gut–brain axis. Taken together, our findings show that constituents found in all major tea types, predominantly L-theanine, polyphenols and polyphenol metabolites, are capable of functioning through multiple pathways simultaneously to collectively reduce the risk of depression.
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Affiliation(s)
- Dylan O'Neill Rothenberg
- Department of Tea Science, College of Horticulture Science, South China Agricultural University, Guangzhou 510640, China.
| | - Lingyun Zhang
- Department of Tea Science, College of Horticulture Science, South China Agricultural University, Guangzhou 510640, China.
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21
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Fields JA, Ellis RJ. HIV in the cART era and the mitochondrial: immune interface in the CNS. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2019; 145:29-65. [PMID: 31208526 DOI: 10.1016/bs.irn.2019.04.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
HIV-associated neurocognitive disorders (HAND) persist in the era of effective combined antiretroviral therapy (cART). A large body of literature suggests that mitochondrial dysfunction is a prospective etiology of HAND in the cART era. While viral load is often suppressed and the immune system remains intact in HIV+ patients on cART, evidence suggests that the central nervous system (CNS) acts as a reservoir for virus and low-level expression of viral proteins, which interact with mitochondria. In particular, the HIV proteins glycoprotein 120, transactivator of transcription, viral protein R, and negative factor have each been linked to mitochondrial dysfunction in the brain. Moreover, cART drugs have also been shown to have detrimental effects on mitochondrial function. Here, we review the evidence generated from human studies, animal models, and in vitro models that support a role for HIV proteins and/or cART drugs in altered production of adenosine triphosphate, mitochondrial dynamics, mitophagy, calcium signaling and apoptosis, oxidative stress, mitochondrial biogenesis, and immunometabolism in the CNS. When insightful, evidence of HIV or cART-induced mitochondrial dysfunction in the peripheral nervous system or other cell types is discussed. Lastly, therapeutic approaches to targeting mitochondrial dysfunction have been summarized with the aim of guiding new investigations and providing hope that mitochondrial-based drugs may provide relief for those suffering with HAND.
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Affiliation(s)
- Jerel Adam Fields
- Department of Psychiatry, University of California San Diego, La Jolla, CA, United States.
| | - Ronald J Ellis
- Department of Neuroscience, University of California San Diego, La Jolla, CA, United States
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22
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Silva E, Arruda L, Vieira J, Soares P, Guerra M. (+)-Catechin and (-)-epigallocatechin gallate: are these promising antioxidant therapies for frozen goat semen? ARQ BRAS MED VET ZOO 2019. [DOI: 10.1590/1678-4162-10539] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
ABSTRACT The aim of this study was to evaluate the effects of different concentrations of (+)-catechin or (-)-epigallocatechin gallate (EGCG) on goat semen freezability. Poolsof semen were processed (Experiment 1: 0, 15, 25, 50, 75, or 100µM (+)-catechin; Experiment 2: 0, 15, 25, 50, 75, or 100µM EGCG) and frozen. After thawing, the samples were evaluated for kinematics, plasma membrane (PMi) and acrosome integrity, morphology, and oxidative stress, at 0 and 1h. In Experiment 1, at 0h, VSL and VAP were greater (P<0.05) with 15µM than with 50 and 100; WOB was lower (P<0.05) with 100µM than with 0, 15, and 25; and BCF was higher (P<0.05) with 75 and 100µM than with 0. In turn, in Experiment 2, progressive motility was higher (P<0.05) with0 and 15µM than with50 and 75; LIN was lower (P<0.05) with75 and100µM than with0 and 15; WOB was higher (P<0.05) with0 and 15µM; and PMi was greater (P<0.05) with100µM than 0. Thus, (+)-catechin or EGCG at higher concentrations inhibits the kinematics of frozen goat sperm, in a transitory way, and 100µM of EGCG preserves the PMi.
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Affiliation(s)
- E.C.B. Silva
- Universidade Federal Rural de Pernambuco, Brazil
| | | | | | - P.C. Soares
- Universidade Federal Rural de Pernambuco, Brazil
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HIV-1 Protein Tat 1-72 Impairs Neuronal Dendrites via Activation of PP1 and Regulation of the CREB/BDNF Pathway. Virol Sin 2018; 33:261-269. [PMID: 29737506 DOI: 10.1007/s12250-018-0031-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 04/02/2018] [Indexed: 12/18/2022] Open
Abstract
Despite the success of combined antiretroviral therapy in recent years, the prevalence of human immunodeficiency virus (HIV)-associated neurocognitive disorders in people living with HIV-1 is increasing, significantly reducing the health-related quality of their lives. Although neurons cannot be infected by HIV-1, shed viral proteins such as transactivator of transcription (Tat) can cause dendritic damage. However, the detailed molecular mechanism of Tat-induced neuronal impairment remains unknown. In this study, we first showed that recombinant Tat (1-72 aa) induced neurotoxicity in primary cultured mouse neurons. Second, exposure to Tat1-72 was shown to reduce the length and number of dendrites in cultured neurons. Third, Tat1-72 (0-6 h) modulates protein phosphatase 1 (PP1) expression and enhances its activity by decreasing the phosphorylation level of PP1 at Thr320. Finally, Tat1-72 (24 h) downregulates CREB activity and CREB-mediated gene (BDNF, c-fos, Egr-1) expression. Together, these findings suggest that Tat1-72 might impair cognitive function by regulating the activity of PP1 and the CREB/BDNF pathway.
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Rashidinejad A, Birch EJ, Everett DW. A novel functional full-fat hard cheese containing liposomal nanoencapsulated green tea catechins: manufacture and recovery following simulated digestion. Food Funct 2018; 7:3283-94. [PMID: 27374326 DOI: 10.1039/c6fo00354k] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
(+)-Catechin or green tea extract were encapsulated in soy lecithin nanoliposomes and incorporated into a full-fat cheese, then ripened at 8 °C for 90 days. Cheese samples were subjected to simulated gastrointestinal digestion to measure total phenolic content (TPC) and antioxidant activity of the cheese digesta, and to determine the catechin recovery after digestion by high performance liquid chromatography (HPLC). Addition of catechin or green tea extract significantly (P ≤ 0.05) increased TPC and antioxidant activity (measured by ferric reducing antioxidant power and oxygen radical absorbance capacity) of the full-fat cheese without affecting pH or proximate composition. HPLC analysis confirmed retention of encapsulated catechins in the cheese curd; however, individual catechins were recovered in differing amounts (15-52%) from cheese digesta after 6 h of digestion. Transmission electron microscopy and Fourier transform infrared spectroscopy provided evidence for association of nanoliposomes with the surface of milk fat globules inside the cheese matrix. The study shows the potential for using cheese as a delivery vehicle for green tea antioxidants.
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Affiliation(s)
- Ali Rashidinejad
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand. and Riddet Institute, Private Bag 11 222, Palmerston North 4442, New Zealand
| | - E John Birch
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
| | - David W Everett
- Riddet Institute, Private Bag 11 222, Palmerston North 4442, New Zealand
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Rashidinejad A, Birch EJ, Sun-Waterhouse D, Everett DW. Addition of milk to tea infusions: Helpful or harmful? Evidence from in vitro and in vivo studies on antioxidant properties. Crit Rev Food Sci Nutr 2018; 57:3188-3196. [PMID: 26517348 DOI: 10.1080/10408398.2015.1099515] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Tea consumption is practised as a tradition, and has shown potential to improve human health. Maximal uptake of tea antioxidants and milk proteins without a negative impact on tea flavor is highly desired by consumers. There is a conflicting evidence of the effect of milk addition to tea on antioxidant activity. Differences in the type of tea, the composition, type and amount of milk, preparation method of tea-milk infusions, the assays used to measure antioxidant activity, and sampling size likely account for different findings. Interactions between tea polyphenols and milk proteins, especially between catechins and caseins, could account for a decrease in antioxidant activity, although other mechanisms are also possible, given the similar effects between soy and bovine milk. The role of milk fat globules and the milk fat globule membrane surface is also important when considering interactions and loss of polyphenolic antioxidant activity, which has not been addressed in the literature.
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Affiliation(s)
- Ali Rashidinejad
- a Department of Food Science , University of Otago , Dunedin , New Zealand.,b Riddet Institute , Palmerston North , New Zealand
| | - E John Birch
- a Department of Food Science , University of Otago , Dunedin , New Zealand
| | | | - David W Everett
- a Department of Food Science , University of Otago , Dunedin , New Zealand.,b Riddet Institute , Palmerston North , New Zealand
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26
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Sangiovanni E, Brivio P, Dell'Agli M, Calabrese F. Botanicals as Modulators of Neuroplasticity: Focus on BDNF. Neural Plast 2017; 2017:5965371. [PMID: 29464125 PMCID: PMC5804326 DOI: 10.1155/2017/5965371] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 11/09/2017] [Accepted: 12/02/2017] [Indexed: 12/19/2022] Open
Abstract
The involvement of brain-derived neurotrophic factor (BDNF) in different central nervous system (CNS) diseases suggests that this neurotrophin may represent an interesting and reliable therapeutic target. Accordingly, the search for new compounds, also from natural sources, able to modulate BDNF has been increasingly explored. The present review considers the literature on the effects of botanicals on BDNF. Botanicals considered were Bacopa monnieri (L.) Pennell, Coffea arabica L., Crocus sativus L., Eleutherococcus senticosus Maxim., Camellia sinensis (L.) Kuntze (green tea), Ginkgo biloba L., Hypericum perforatum L., Olea europaea L. (olive oil), Panax ginseng C.A. Meyer, Rhodiola rosea L., Salvia miltiorrhiza Bunge, Vitis vinifera L., Withania somnifera (L.) Dunal, and Perilla frutescens (L.) Britton. The effect of the active principles responsible for the efficacy of the extracts is reviewed and discussed as well. The high number of articles published (more than one hundred manuscripts for 14 botanicals) supports the growing interest in the use of natural products as BDNF modulators. The studies reported strengthen the hypothesis that botanicals may be considered useful modulators of BDNF in CNS diseases, without high side effects. Further clinical studies are mandatory to confirm botanicals as preventive agents or as useful adjuvant to the pharmacological treatment.
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Affiliation(s)
- Enrico Sangiovanni
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Paola Brivio
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Mario Dell'Agli
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Francesca Calabrese
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
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Oliveira D, Nilsson A. Effects of dark-chocolate on appetite variables and glucose tolerance: A 4 week randomised crossover intervention in healthy middle aged subjects. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.08.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Cheruku SP, Ramalingayya GV, Chamallamudi MR, Biswas S, Nandakumar K, Nampoothiri M, Gourishetti K, Kumar N. Catechin ameliorates doxorubicin-induced neuronal cytotoxicity in in vitro and episodic memory deficit in in vivo in Wistar rats. Cytotechnology 2017; 70:245-259. [PMID: 28900743 DOI: 10.1007/s10616-017-0138-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 09/02/2017] [Indexed: 12/13/2022] Open
Abstract
Cognitive dysfunction by chemotherapy compromises the quality of life in cancer patients. Tea polyphenols are known chemopreventive agents. The present study was designed to evaluate the neuroprotective potential of (+) catechin hydrate (catechin), a tea polyphenol, in IMR-32 neuroblastoma cells in vitro and alleviation of episodic memory deficit in Wistar rats in vivo against a widely used chemotherapeutic agent, Doxorubicin (DOX). In vitro, neuroprotective studies were assessed in undifferentiated IMR-32 cells using percentage viability and in differentiated cells by neurite length. These studies showed catechin increased percentage viability of undifferentiated IMR-32 cells. Catechin pretreatment also showed an increase in neurite length of differentiated cells. In vivo neuroprotection of catechin was evaluated using novel object recognition task in time-induced memory deficit model at 50, 100 and 200 mg/kg dose and DOX-induced memory deficit models at 100 mg/kg dose. The latter model was developed by injection of DOX (2.5 mg/kg, i.p.) in 10 cycles over 50 days in Wistar rats. Catechin showed a significant reversal of time-induced memory deficit in a dose-dependent manner and prevention of DOX-induced memory deficit at 100 mg/kg. In addition, catechin treatment showed a significant decrease in oxidative stress, acetylcholine esterase and neuroinflammation in the hippocampus and cerebral cortex in DOX-induced toxicity model. Hence, catechin may be a potential adjuvant therapy for the amelioration of DOX-induced cognitive impairment which may improve the quality of life of cancer survivors. This improvement might be due to the elevation of antioxidant defense, prevention of neuroinflammation and inhibition of acetylcholine esterase enzyme.
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Affiliation(s)
- Sri Pragnya Cheruku
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, Karnataka, 576104, India
| | - Grandhi Venkata Ramalingayya
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, Karnataka, 576104, India
| | - Mallikarjuna Rao Chamallamudi
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, Karnataka, 576104, India
| | - Subhankar Biswas
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, Karnataka, 576104, India
| | - Krishnadas Nandakumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, Karnataka, 576104, India
| | - Madhavan Nampoothiri
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, Karnataka, 576104, India
| | - Karthik Gourishetti
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, Karnataka, 576104, India
| | - Nitesh Kumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, Karnataka, 576104, India.
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A Review of the Antiviral Role of Green Tea Catechins. Molecules 2017; 22:molecules22081337. [PMID: 28805687 PMCID: PMC6152177 DOI: 10.3390/molecules22081337] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 08/07/2017] [Accepted: 08/10/2017] [Indexed: 12/16/2022] Open
Abstract
Over the centuries, infectious diseases caused by viruses have seriously threatened human health globally. Viruses are responsible not only for acute infections but also many chronic infectious diseases. To prevent diseases caused by viruses, the discovery of effective antiviral drugs, in addition to vaccine development, is important. Green tea catechins (GTCs) are polyphenolic compounds from the leaves of Camelliasinensis. In recent decades, GTCs have been reported to provide various health benefits against numerous diseases. Studies have shown that GTCs, especially epigallocatechin-3-gallate (EGCG), have antiviral effects against diverse viruses. The aim of this review is to summarize the developments regarding the antiviral activities of GTCs, to discuss the mechanisms underlying these effects and to offer suggestions for future research directions and perspectives on the antiviral effects of EGCG.
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Rozzi SJ, Avdoshina V, Fields JA, Trejo M, Ton HT, Ahern GP, Mocchetti I. Human Immunodeficiency Virus Promotes Mitochondrial Toxicity. Neurotox Res 2017; 32:723-733. [PMID: 28695547 DOI: 10.1007/s12640-017-9776-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 06/15/2017] [Accepted: 06/28/2017] [Indexed: 01/09/2023]
Abstract
Combined antiretroviral therapies (cART) have had remarkable success in reducing morbidity and mortality among patients infected with human immunodeficiency virus (HIV). However, mild forms of HIV-associated neurocognitive disorders (HAND), characterized by loss of synapses, remain. cART may maintain an undetectable HIV RNA load but does not eliminate the expression of viral proteins such as trans-activator of transcription (Tat) and the envelope glycoprotein gp120 in the brain. These two viral proteins are known to promote synaptic simplifications by several mechanisms, including alteration of mitochondrial function and dynamics. In this review, we aim to outline the many targets and pathways used by viral proteins to alter mitochondria dynamics, which contribute to HIV-induced neurotoxicity. A better understanding of these pathways is crucial for the development of adjunct therapies for HAND.
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Affiliation(s)
- Summer J Rozzi
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Medical Center, 3970 Reservoir Rd NW, Washington, DC, 20057, USA
| | - Valeria Avdoshina
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Medical Center, 3970 Reservoir Rd NW, Washington, DC, 20057, USA
| | - Jerel A Fields
- Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
| | - Margarita Trejo
- Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
| | - Hoai T Ton
- Department of Pharmacology, Georgetown University Medical Center, Washington, DC, 20057, USA
| | - Gerard P Ahern
- Department of Pharmacology, Georgetown University Medical Center, Washington, DC, 20057, USA
| | - Italo Mocchetti
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Medical Center, 3970 Reservoir Rd NW, Washington, DC, 20057, USA.
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Abstract
Despite the success of cART, greater than 50% of HIV infected people develop cognitive and motor deficits termed HIV-associated neurocognitive disorders (HAND). Macrophages are the major cell type infected in the CNS. Unlike for T cells, the virus does not kill macrophages and these long-lived cells may become HIV reservoirs in the brain. They produce cytokines/chemokines and viral proteins that promote inflammation and neuronal damage, playing a key role in HIV neuropathogenesis. HIV Tat is the transactivator of transcription that is essential for replication and transcriptional regulation of the virus and is the first protein to be produced after HIV infection. Even with successful cART, Tat is produced by infected cells. In this study we examined the role of the HIV Tat protein in the regulation of gene expression in human macrophages. Using THP-1 cells, a human monocyte/macrophage cell line, and their infection with lentivirus, we generated stable cell lines that express Tat-Flag. We performed ChIP-seq analysis of these cells and found 66 association sites of Tat in promoter or coding regions. Among these are C5, CRLF2/TSLPR, BDNF, and APBA1/Mint1, genes associated with inflammation/damage. We confirmed the association of Tat with these sequences by ChIP assay and expression of these genes in our THP-1 cell lines by qRT-PCR. We found that HIV Tat increased expression of C5, APBA1, and BDNF, and decreased CRLF2. The K50A Tat-mutation dysregulated expression of these genes without affecting the binding of the Tat complex to their gene sequences. Our data suggest that HIV Tat, produced by macrophage HIV reservoirs in the brain despite successful cART, contributes to neuropathogenesis in HIV-infected people.
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HIV-1 gp120 Upregulates Brain-Derived Neurotrophic Factor (BDNF) Expression in BV2 Cells via the Wnt/β-Catenin Signaling Pathway. J Mol Neurosci 2017; 62:199-208. [PMID: 28560687 DOI: 10.1007/s12031-017-0931-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Accepted: 05/08/2017] [Indexed: 01/11/2023]
Abstract
HIV-1 gp120 plays a critical role in the pathogenesis of HIV-associated pain, but the underlying molecular mechanisms are incompletely understood. This study aims to determine the effect and possible mechanism of HIV-1 gp120 on BDNF expression in BV2 cells (a murine-derived microglial cell line). We observed that gp120 (10 ng/ml) activated BV2 cells in cultures and upregulated proBDNF/mBDNF. Furthermore, gp120-treated BV2 also accumulated Wnt3a and β-catenin, suggesting the activation of the Wnt/β-catenin pathway. We demonstrated that activation of the pathway by Wnt3a upregulated BDNF expression. In contrast, inhibition of the Wnt/β-catenin pathway by either DKK1 or IWR-1 attenuated BDNF upregulation induced by gp120 or Wnt3a. These findings collectively suggest that gp120 stimulates BDNF expression in BV2 cells via the Wnt/β-catenin signaling pathway.
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Nishibori N, Kishibuchi R, Her S, Lee MS, Morita K. Lotus Root Extract Stimulates BDNF Gene Expression Through Potential Mechanism Depending on HO-1 Activity in C6 Glioma Cells. J Diet Suppl 2017; 15:11-23. [DOI: 10.1080/19390211.2017.1310782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Naoyoshi Nishibori
- Department of Food Science and Nutrition, Shikoku Junior College, Ohjin, Tokushima, Japan
- Life Science Research Group, Shikoku University School of Health Sciences, Ohjin, Tokushima, Japan
| | - Reina Kishibuchi
- Life Science Research Group, Shikoku University School of Health Sciences, Ohjin, Tokushima, Japan
| | - Song Her
- Division of Bio-Imaging, Chuncheon Center, Korea Basic Science Institute, Chuncheon, Republic of Korea
| | - Mi-Sook Lee
- Division of Bio-Imaging, Chuncheon Center, Korea Basic Science Institute, Chuncheon, Republic of Korea
| | - Kyoji Morita
- Life Science Research Group, Shikoku University School of Health Sciences, Ohjin, Tokushima, Japan
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35
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Shaki F, Shayeste Y, Karami M, Akbari E, Rezaei M, Ataee R. The effect of epicatechin on oxidative stress and mitochondrial damage induced by homocycteine using isolated rat hippocampus mitochondria. Res Pharm Sci 2017; 12:119-127. [PMID: 28515764 PMCID: PMC5385726 DOI: 10.4103/1735-5362.202450] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Oxidative stress and mitochondrial dysfunction are the main suggested mechanisms for neurodegenerative diseases. In this study, we have evaluated the effects of epicatechin (EC) on mitochondrial damage induced by homocycteine (Hcy) using isolated rat hippocampus mitochondria in vivo. EC (50 mg/kg) was gavaged daily for a period of 10 days, starting 5 days prior to Hcy (0.5 μmol/μL) intra hippocampus injection in rats. Mitochondria were isolated from brain by different centrifuge techniques. Mitochondrial function was assayed by MTT test. Also, mitochondrial swelling and oxidative stress markers, such as reactive oxygen species (ROS), lipid peroxidation and glutathione (GSH), were assayed. Hcy induced mitochondrial dysfunction and swelling. Increase in ROS formation, lipid peroxidation, and decreased GSH were observed after Hcy treatment in isolated brain mitochondria. Furthermore, oral administration of EC significantly decreased the lipid peroxidation and ROS levels and also increased GSH levels. Also, EC treatment significantly improved mitochondrial function. As EC indicated protective effects against oxidative stress and mitochondrial damage induced by Hcy, it is suggested for further trials for prevention or treatments of neurodegenerative disorders such as Alzheimer disease.
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Affiliation(s)
- Fatemeh Shaki
- Department of Toxicology and Pharmacology and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, I.R. Iran
| | - Yaghoub Shayeste
- Department of Toxicology and Pharmacology and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, I.R. Iran
| | - Mohammad Karami
- Department of Toxicology and Pharmacology and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, I.R. Iran
| | - Esmaeil Akbari
- Department of Physiology and Pharmacology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, I.R. Iran
| | - Mahdi Rezaei
- Department of Toxicology and Pharmacology and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, I.R. Iran
| | - Ramin Ataee
- Department of Toxicology and Pharmacology and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, I.R. Iran.,Thalassemia Research Center, Mazandaran University of Medical Sciences, Sari, I.R. Iran
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36
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Rashidinejad A, Birch EJ, Sun-Waterhouse D, Everett DW. Effect of liposomal encapsulation on the recovery and antioxidant properties of green tea catechins incorporated into a hard low-fat cheese following in vitro simulated gastrointestinal digestion. FOOD AND BIOPRODUCTS PROCESSING 2016. [DOI: 10.1016/j.fbp.2016.07.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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37
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Morita K, Nishibori N, Kishibuchi R, Itoh M, Horie Y, Nemoto H. Fermented Brown Rice Extract Stimulates BDNF Gene Transcription in C6 Glioma Cells: Possible Connection with HO-1 Expression. J Diet Suppl 2016; 14:214-228. [PMID: 27560964 DOI: 10.1080/19390211.2016.1207743] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Fermented brown rice with Aspergillus oryzae, designated as FBRA, is known to be commercially available dietary fiber-rich food, which is appreciated as prebiotics to improve intestinal microflora, and also shown to contain various biologically active substances including polyphenolic compounds. On the other hand, polyphenolic compounds have been suggested to stimulate the expression of brain-derived neurotrophic factor (BDNF) gene in connection with the expression of heme oxidase-1 (HO-1) gene in glial cells, thus resulting in the augmentation of BDNF production in the brain, thereby being anticipated to have a putative effect on the brain function. Then, the effect of FBRA extract on HO-1 and BDNF messenger ribonucleic acid (mRNA) levels in C6 glioma cells was examined, and the extract was shown to stimulate both HO-1 and BDNF gene transcription in the glioma cells. Further studies showed that the stimulatory effect of FBRA extract on BDNF gene transcription was almost completely suppressed by silencing HO-1 gene expression with an HO-1 antisense oligodeoxynucleotide and also inhibiting HO-1 activity with an inhibitor zinc protoporphyrin, thus suggesting that FBRA might have a potential ability to induce BDNF gene expression through HO-1 activity in glial cells.
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Affiliation(s)
- Kyoji Morita
- a Life Science Research Group , Shikoku University School of Health Sciences , Ohjin , Tokushima , Japan
| | - Naoyoshi Nishibori
- a Life Science Research Group , Shikoku University School of Health Sciences , Ohjin , Tokushima , Japan.,b Department of Food Science and Nutrition , Shikoku Junior College , Ohjin , Tokushima , Japan
| | - Reina Kishibuchi
- a Life Science Research Group , Shikoku University School of Health Sciences , Ohjin , Tokushima , Japan
| | - Mari Itoh
- c Research and Development Division, Kohken Co. Ltd. , Tohbetsu, Ishikari-gun , Hokkaido , Japan
| | - Yukiko Horie
- c Research and Development Division, Kohken Co. Ltd. , Tohbetsu, Ishikari-gun , Hokkaido , Japan
| | - Hideyuki Nemoto
- c Research and Development Division, Kohken Co. Ltd. , Tohbetsu, Ishikari-gun , Hokkaido , Japan
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Rashidinejad A, Birch EJ, Hindmarsh J, Everett DW. Molecular interactions between green tea catechins and cheese fat studied by solid-state nuclear magnetic resonance spectroscopy. Food Chem 2016; 215:228-34. [PMID: 27542471 DOI: 10.1016/j.foodchem.2016.07.179] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 07/28/2016] [Accepted: 07/29/2016] [Indexed: 11/27/2022]
Abstract
Molecular integrations between green tea catechins and milk fat globules in a cheese matrix were investigated using solid-state magic angle spinning nuclear magnetic resonance spectroscopy. Full-fat cheeses were manufactured containing free catechin or free green tea extract (GTE), and liposomal encapsulated catechin or liposomal encapsulated GTE. Molecular mobility of the carbon species in the cheeses was measured by a wide-line separation technique. The (1)H evolution frequency profile of the (13)C peak at 16ppm obtained for the control cheese and cheeses containing encapsulated polyphenols (catechin or GTE) were similar, however, the spectrum was narrower for cheeses containing free polyphenols. Differences in spectral width indicates changes in the molecular mobility of --CH3- or -C-C-PO4- species through hydrophobic and/or cation-π associations between green tea catechins and cheese fat components. However, the similar spectral profile suggests that encapsulation protects cheese fat from interaction with catechins.
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Affiliation(s)
- Ali Rashidinejad
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Riddet Institute, Private Bag 11 222, Palmerston North 4442, New Zealand.
| | - Edward J Birch
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Jason Hindmarsh
- Massey Institute of Food Science and Technology, Private Bag 11 222, Palmerston North 4442, New Zealand
| | - David W Everett
- Riddet Institute, Private Bag 11 222, Palmerston North 4442, New Zealand
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Lee J, Jo DG, Park D, Chung HY, Mattson MP. Adaptive cellular stress pathways as therapeutic targets of dietary phytochemicals: focus on the nervous system. Pharmacol Rev 2015; 66:815-68. [PMID: 24958636 DOI: 10.1124/pr.113.007757] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
During the past 5 decades, it has been widely promulgated that the chemicals in plants that are good for health act as direct scavengers of free radicals. Here we review evidence that favors a different hypothesis for the health benefits of plant consumption, namely, that some phytochemicals exert disease-preventive and therapeutic actions by engaging one or more adaptive cellular response pathways in cells. The evolutionary basis for the latter mechanism is grounded in the fact that plants produce natural antifeedant/noxious chemicals that discourage insects and other organisms from eating them. However, in the amounts typically consumed by humans, the phytochemicals activate one or more conserved adaptive cellular stress response pathways and thereby enhance the ability of cells to resist injury and disease. Examplesof such pathways include those involving the transcription factors nuclear factor erythroid 2-related factor 2, nuclear factor-κB, hypoxia-inducible factor 1α, peroxisome proliferator-activated receptor γ, and forkhead box subgroup O, as well as the production and action of trophic factors and hormones. Translational research to develop interventions that target these pathways may lead to new classes of therapeutic agents that act by stimulating adaptive stress response pathways to bolster endogenous defenses against tissue injury and disease. Because neurons are particularly sensitive to potentially noxious phytochemicals, we focus on the nervous system but also include findings from other cell types in which actions of phytochemicals on specific signal transduction pathways have been more thoroughly studied.
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Affiliation(s)
- Jaewon Lee
- Department of Pharmacy, College of Pharmacy, and Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Geumjeong-gu, Busan, Republic of Korea (J.L., D.P., H.Y.C.); School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea (D.-G.J.); Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland (M.P.M.); and Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland (M.P.M.)
| | - Dong-Gyu Jo
- Department of Pharmacy, College of Pharmacy, and Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Geumjeong-gu, Busan, Republic of Korea (J.L., D.P., H.Y.C.); School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea (D.-G.J.); Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland (M.P.M.); and Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland (M.P.M.)
| | - Daeui Park
- Department of Pharmacy, College of Pharmacy, and Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Geumjeong-gu, Busan, Republic of Korea (J.L., D.P., H.Y.C.); School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea (D.-G.J.); Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland (M.P.M.); and Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland (M.P.M.)
| | - Hae Young Chung
- Department of Pharmacy, College of Pharmacy, and Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Geumjeong-gu, Busan, Republic of Korea (J.L., D.P., H.Y.C.); School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea (D.-G.J.); Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland (M.P.M.); and Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland (M.P.M.)
| | - Mark P Mattson
- Department of Pharmacy, College of Pharmacy, and Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Geumjeong-gu, Busan, Republic of Korea (J.L., D.P., H.Y.C.); School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea (D.-G.J.); Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland (M.P.M.); and Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland (M.P.M.)
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40
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Steiner JP, Bachani M, Wolfson-Stofko B, Lee MH, Wang T, Li G, Li W, Strayer D, Haughey NJ, Nath A. Interaction of paroxetine with mitochondrial proteins mediates neuroprotection. Neurotherapeutics 2015; 12:200-16. [PMID: 25404050 PMCID: PMC4322069 DOI: 10.1007/s13311-014-0315-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
There are severe neurological complications that arise from HIV infection, ranging from peripheral sensory neuropathy to cognitive decline and dementia for which no specific treatments are available. The HIV proteins secreted from infected macrophages, gp120 and Tat, are neurotoxic. The goal of this study was to screen, identify and develop neuroprotective compounds relevant to HIV-associated neurocognitive disorders (HAND). We screened more than 2000 compounds that included FDA approved drugs for protective efficacy against oxidative stress-mediated neurodegeneration and identified selective serotonin reuptake inhibitors (SSRIs) as potential neuroprotectants. Numerous SSRIs were then extensively evaluated as protectants against neurotoxicity as measured by changes in neuronal cell death, mitochondrial potential, and axodendritic degeneration elicited by HIV Tat and gp120 and other mitochondrial toxins. While many SSRIs demonstrated neuroprotective actions, paroxetine was potently neuroprotective (100 nM potency) against these toxins in vitro and in vivo following systemic administration in a gp120 neurotoxicity model. Interestingly, the inhibition of serotonin reuptake by paroxetine was not required for neuroprotection, since depletion of the serotonin transporter had no effect on its neuroprotective properties. We determined that paroxetine interacts selectively and preferentially with brain mitochondrial proteins and blocks calcium-dependent swelling but had less effect on liver mitochondria. Additionally, paroxetine induced proliferation of neural progenitor cells in vitro and in vivo in gp120 transgenic animals. Therefore, SSRIs such as paroxetine may provide a novel adjunctive neuroprotective and neuroregenerative therapy to treat HIV-infected individuals.
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Affiliation(s)
- Joseph P. Steiner
- />Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287 USA
- />Translational Neuroscience Center, National Institute of Neurological Diseases and Stroke, National Bldg 10, Room 7C-105, 10 Center Drive, Bethesda, MD 20892 USA
| | - Muznabanu Bachani
- />Translational Neuroscience Center, National Institute of Neurological Diseases and Stroke, National Bldg 10, Room 7C-105, 10 Center Drive, Bethesda, MD 20892 USA
| | - Brett Wolfson-Stofko
- />Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287 USA
| | - Myoung-Hwa Lee
- />Section of Infections of the Nervous System, National Institute of Neurological Diseases and Stroke, National Institute of Health, Bldg 10, Room 7C103, 10 Center Drive, Bethesda, MD 20892 USA
| | - Tonguang Wang
- />Translational Neuroscience Center, National Institute of Neurological Diseases and Stroke, National Bldg 10, Room 7C-105, 10 Center Drive, Bethesda, MD 20892 USA
| | - Guanhan Li
- />Section of Infections of the Nervous System, National Institute of Neurological Diseases and Stroke, National Institute of Health, Bldg 10, Room 7C103, 10 Center Drive, Bethesda, MD 20892 USA
| | - Wenxue Li
- />Section of Infections of the Nervous System, National Institute of Neurological Diseases and Stroke, National Institute of Health, Bldg 10, Room 7C103, 10 Center Drive, Bethesda, MD 20892 USA
| | - David Strayer
- />Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA 19107 USA
| | - Norman J. Haughey
- />Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287 USA
| | - Avindra Nath
- />Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287 USA
- />Translational Neuroscience Center, National Institute of Neurological Diseases and Stroke, National Bldg 10, Room 7C-105, 10 Center Drive, Bethesda, MD 20892 USA
- />Section of Infections of the Nervous System, National Institute of Neurological Diseases and Stroke, National Institute of Health, Bldg 10, Room 7C103, 10 Center Drive, Bethesda, MD 20892 USA
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41
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Malik N, Efthymiou AG, Mather K, Chester N, Wang X, Nath A, Rao MS, Steiner JP. Compounds with species and cell type specific toxicity identified in a 2000 compound drug screen of neural stem cells and rat mixed cortical neurons. Neurotoxicology 2014; 45:192-200. [PMID: 25454721 DOI: 10.1016/j.neuro.2014.10.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Revised: 10/08/2014] [Accepted: 10/08/2014] [Indexed: 11/30/2022]
Abstract
Human primary neural tissue is a vital component for the quick and simple determination of chemical compound neurotoxicity in vitro. In particular, such tissue would be ideal for high-throughput screens that can be used to identify novel neurotoxic or neurotherapeutic compounds. We have previously established a high-throughput screening platform using human induced pluripotent stem cell (iPSC)-derived neural stem cells (NSCs) and neurons. In this study, we conducted a 2000 compound screen with human NSCs and rat cortical cells to identify compounds that are selectively toxic to each group. Approximately 100 of the tested compounds showed specific toxicity to human NSCs. A secondary screen of a small subset of compounds from the primary screen on human iPSCs, NSC-derived neurons, and fetal astrocytes validated the results from >80% of these compounds with some showing cell specific toxicity. Amongst those compounds were several cardiac glycosides, all of which were selectively toxic to the human cells. As the screen was able to reliably identify neurotoxicants, many with species and cell-type specificity, this study demonstrates the feasibility of this NSC-driven platform for higher-throughput neurotoxicity screens.
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Affiliation(s)
- Nasir Malik
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, United States.
| | - Anastasia G Efthymiou
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, United States
| | - Karly Mather
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, United States
| | - Nathaniel Chester
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, United States
| | - Xiantao Wang
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, United States
| | - Avindra Nath
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, United States
| | - Mahendra S Rao
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, United States; National Institute of Health Center for Regenerative Medicine, National Institutes of Health, United States
| | - Joseph P Steiner
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, United States
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Abstract
Humans and their predecessors evolved in environments where they were challenged intermittently with: 1) food scarcity; 2) the need for aerobic fitness to catch/kill prey and avoid or repel attackers; and 3) exposure to biological toxins present in foodstuffs. Accordingly, cells and organ systems acquired and retained molecular signaling and metabolic pathways through which the environmental challenges enhanced the functionality and resilience of the cells and organisms. Within the past 60 years there has been a precipitous diminution of such challenges in modern societies because of the development of technologies that provide a continuous supply of energy-dense processed foods and that largely eliminate the need for physical exertion. As a consequence of the modern 'couch potato' lifestyle, signaling pathways that mediate beneficial effects of environmental challenges on health and disease resistance are disengaged, thereby rendering people vulnerable to obesity, diabetes, cardiovascular disease, cancers and neurodegenerative disorders. Reversal of the epidemic of diseases caused by unchallenging lifestyles will require a society-wide effort to re-introduce intermittent fasting, exercise and consumption of plants containing hormetic phytochemicals into daily and weekly routines.
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Affiliation(s)
- Mark P Mattson
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD. 21224
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43
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Meulendyke KA, Queen SE, Engle EL, Shirk EN, Liu J, Steiner JP, Nath A, Tarwater PM, Graham DR, Mankowski JL, Zink MC. Combination fluconazole/paroxetine treatment is neuroprotective despite ongoing neuroinflammation and viral replication in an SIV model of HIV neurological disease. J Neurovirol 2014; 20:591-602. [PMID: 25227932 DOI: 10.1007/s13365-014-0283-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 08/14/2014] [Indexed: 12/20/2022]
Abstract
Effective combined antiretroviral therapy (cART) in HIV-infected patients has made HIV a treatable infection; however, debilitating HIV-associated neurocognitive disorders (HAND) can still affect approximately 50% of HIV-infected individuals even under cART. While cART has greatly reduced the prevalence of the most severe form of HAND, milder forms have increased in prevalence, leaving the total proportion of HIV-infected individuals suffering from HAND relatively unchanged. In this study, an in vitro drug screen identified fluconazole and paroxetine as protective compounds against HIV gp120 and Tat neurotoxicity. Using an accelerated, consistent SIV/macaque model of HIV-associated CNS disease, we tested the in vivo neuroprotective capabilities of combination fluconazole/paroxetine (FluPar) treatment. FluPar treatment protected macaques from SIV-induced neurodegeneration, as measured by neurofilament light chain in the CSF, APP accumulation in axons, and CaMKIIα in the frontal cortex, but did not significantly reduce markers of neuroinflammation or plasma or CNS viral loads. Since HIV and SIV neurodegeneration is often attributed to accompanying neuroinflammation, this study provides proof of concept that neuroprotection can be achieved even in the face of ongoing neuroinflammation and viral replication.
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Affiliation(s)
- Kelly A Meulendyke
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, 733 North Broadway Street, MRB 819, Baltimore, MD, 21205, USA
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44
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Chokor R, Lamy S, Annabi B. Transcriptional targeting of sphingosine-1-phosphate receptor S1P2 by epigallocatechin-3-gallate prevents sphingosine-1-phosphate-mediated signaling in macrophage-differentiated HL-60 promyelomonocytic leukemia cells. Onco Targets Ther 2014; 7:667-77. [PMID: 24855377 PMCID: PMC4019616 DOI: 10.2147/ott.s62717] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Background Macrophage chemotaxis followed by blood–brain barrier transendothelial migration is believed to be associated with inflammation in the central nervous system. Antineuroinflammatory strategies have identified the dietary-derived epigallocatechin-3-gallate (EGCG) as an efficient agent to prevent neuroinflammation-associated neurodegenerative diseases by targeting proinflammatory mediator signaling. Methods Given that high levels of sphingosine kinase and its product, sphingosine-1-phosphate (S1P), are present in brain tumors, we used quantitative reverse-transcription polymerase chain reaction (qRT-PCR) and immunoblotting to test whether EGCG may impact on S1P receptor gene expression and prevent S1P response in undifferentiated and in terminally differentiated macrophages. Results Promyelomonocytic human leukemia (HL)-60 cells were differentiated into macrophages, and S1P triggered phosphorylation in extracellular signal-regulated kinase (ERK), c-Jun N-terminal kinase (JNK), and P38 mitogen-activated protein kinase (MAPK) intracellular signaling, as shown by Western blot analysis. Pretreatment of cells with EGCG prior to differentiation inhibited the response to S1P in all three pathways, while EGCG abrogated P38 MAPK phosphorylation when present only during differentiation. Terminally-differentiated macrophages were, however, insensitive to EGCG treatment. Using qRT-PCR, gene expression of the S1P receptors S1P1, S1P2, and S1P5 was predominantly induced in terminally-differentiated macrophages, while the S1P2 was decreased by EGCG treatment. Conclusion Our data suggest that diet-derived EGCG achieves efficient effects as a preventive agent, targeting signaling pathways prior to cell terminal differentiation. Such properties could impact on cell chemotaxis through the blood–brain barrier and prevent cancer-related neuroinflammation.
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Affiliation(s)
- Rima Chokor
- Laboratoire d'Oncologie Moléculaire, Centre de recherche BIOMED, Département de Chimie, Université du Québec à Montréal, Montreal, QC, Canada
| | - Sylvie Lamy
- Laboratoire d'Oncologie Moléculaire, Centre de recherche BIOMED, Département de Chimie, Université du Québec à Montréal, Montreal, QC, Canada
| | - Borhane Annabi
- Laboratoire d'Oncologie Moléculaire, Centre de recherche BIOMED, Département de Chimie, Université du Québec à Montréal, Montreal, QC, Canada
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45
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PACAP27 is protective against tat-induced neurotoxicity. J Mol Neurosci 2014; 54:485-93. [PMID: 24696163 DOI: 10.1007/s12031-014-0273-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Accepted: 02/24/2014] [Indexed: 10/25/2022]
Abstract
Human immunodeficiency virus type-1 (HIV) infection of the central nervous system promotes neuronal injury and apoptosis that culminate in HIV-associated neurocognitive disorders (HAND). Viral proteins, such as transactivator of transcription (Tat), have emerged as leading candidates to explain HIV-mediated neurotoxicity, though the mechanism remains unclear. To determine the effects of Tat, rat cortical neurons were exposed to nanomolar concentrations of Tat for various time points. Within a few hours, Tat induced the production of reactive oxygen species (ROS), and other indices of mitochondrial destabilization. In addition, we observed a significant induction of DNA double-strand breaks (DSBs) by Tat. We next investigated the neuroprotective activity of the pituitary adenylate cyclase-activating polypeptide 27 (PACAP27) against these cardinal features of Tat-induced neurodegeneration. PACAP27 (100 nM) inhibited all Tat-mediated toxic effects including DNA DSBs. Importantly, PACAP27 prevented the induction of neuronal loss induced by Tat. The neuroprotective effect of PACAP27 is correlated with its ability to release the anti-apoptotic chemokine CCL5. Our data support a mechanism of Tat neurotoxicity in which Tat induces mitochondrial destabilization, thus increasing the release of ROS, which causes DNA DSBs leading to cell death. PACAP27, through CCL5, mitigates the effects of Tat-induced neuronal dysfunction, suggesting that PACAP27 could be a new strategy for an adjunct therapy against HIV-associated neurocognitive disorders.
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Steiner JP, Nath A. Neurotrophin strategies for neuroprotection: are they sufficient? J Neuroimmune Pharmacol 2014; 9:182-94. [PMID: 24609976 DOI: 10.1007/s11481-014-9533-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 02/13/2014] [Indexed: 12/30/2022]
Abstract
As people are living longer, the prevalance of neurodegenerative diseases continues to rise resulting in huge socio-economic consequences. Despite major advancements in studying the pathophysiology of these diseases and a large number of clinical trials currently there is no effective treatment for these illnesses. All neuroprotective strategies have either failed or have shown only a minimal effect. There has been a major shift in recent years exploring the potential of neuroregenerative approaches. While the concept of using neurotropins for therapeutic purposes has been in existence for many years, new modes of delivery and expression of this family of molecules makes this approach now feasilble. Further neurotropin mimetics and receptor agonists are also being developed. The use of small molecules to induce the expression of neurotropins including repurposing of FDA approved drugs for this approach is another strategy being pursued. In the review we examine these new developments and discuss the potential for such approaches in the context of the pathophysiology of neurodegenerative diseases.
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Affiliation(s)
- Joseph P Steiner
- NINDS Translational Neuroscience Center, National Institutes of Health, Room 7C-105; Bldg 10, 10 Center Drive, Bethesda, MD, 20892, USA,
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47
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Abstract
Green and black teas contain different biologically active polyphenolic compounds that might offer protection against a variety of human diseases. Although promising experimental and clinical data have shown protective effects, limited information is available on how these beneficial effects of tea polyphenols are mediated at the cellular level. Evidence is accumulating that catechins in green tea as well as theaflavins and thearubigins from black tea are the substances responsible for the physiologic effects of tea in vitro. The green tea catechin epigallocatechin-3-gallate (EGCG) is generally considered to be the biologically most active compound in vitro. The changes in the activities of various protein kinases, growth factors, and transcription factors represent a common mechanism involved in cellular effects of tea polyphenols. In addition to modification of intracellular signaling by activation of cellular receptors, it was shown that, at least for EGCG, tea polyphenols can enter the cells and directly interact with their molecular targets within cells. There, they frequently result in opposite effects in primary compared with tumor cells. Although tea polyphenols were long regarded as antioxidants, research in recent years has uncovered their prooxidant properties. The use of high nonphysiologic concentrations in many cell culture studies raises questions about the biological relevance of the observed effects for the in vivo situation. Efforts to attribute functional effects in vivo to specific molecular targets at the cellular level are still ongoing.
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Affiliation(s)
- Mario Lorenz
- From Charité-Universitätsmedizin Berlin, Medizinische Klinik für Kardiologie und Angiologie, CCM, Berlin, Germany
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48
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Radák Z, Silye G, Bartha C, Jakus J, Stefanovits-Bányai É, Atalay M, Marton O, Koltai E. The effects of cocoa supplementation, caloric restriction, and regular exercise, on oxidative stress markers of brain and memory in the rat model. Food Chem Toxicol 2013; 61:36-41. [DOI: 10.1016/j.fct.2013.01.047] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 01/15/2013] [Accepted: 01/16/2013] [Indexed: 10/27/2022]
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49
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Lee MH, Amin ND, Venkatesan A, Wang T, Tyagi R, Pant HC, Nath A. Impaired neurogenesis and neurite outgrowth in an HIV-gp120 transgenic model is reversed by exercise via BDNF production and Cdk5 regulation. J Neurovirol 2013; 19:418-31. [PMID: 23982957 PMCID: PMC3799978 DOI: 10.1007/s13365-013-0194-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Accepted: 07/31/2013] [Indexed: 01/26/2023]
Abstract
Human immunodeficiency virus (HIV) infection-associated neurocognitive disorders is accompanied with brain atrophy. In these patients, impairment of adult neurogenesis and neurite outgrowth in the hippocampus may contribute to cognitive dysfunction. Although running exercises can enhance neurogenesis and normalize neurite outgrowth, the underlying molecular mechanisms are not well understood. The HIV envelope protein, gp120, has been shown to impair neurogenesis. Using a gp120 transgenic mouse model, we demonstrate that exercise stimulated neural progenitor cell (NPC) proliferation in the hippocampal dentate gyrus and increased the survival rate and generation of newborn cells. However, sustained exercise activity was necessary as the effects were reversed by detraining. Exercise also normalized dendritic outgrowth of neurons. Furthermore, it increased the expression of hippocampal brain-derived neurotrophic factor (BDNF) and normalized hyperactivation of cyclin-dependent kinase 5 (Cdk5). Hyperactivated Cdk5 or gp120 treatment led to aberrant neurite outgrowth and BDNF treatment normalized the neurite outgrowth in NPC cultures. These results suggest that sustained exercise has trophic activity on the neuronal lineage which is mediated by Cdk5 modulation of the BDNF pathway.
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Affiliation(s)
- Myoung-Hwa Lee
- Section of Infections of the Nervous System, National Institutes of Health, M.D. Bldg 10, Room 7C-103, 10 Center Drive, Bethesda, MD, 20892, USA
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50
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Rodrigues J, Assunção M, Lukoyanov N, Cardoso A, Carvalho F, Andrade JP. Protective effects of a catechin-rich extract on the hippocampal formation and spatial memory in aging rats. Behav Brain Res 2013; 246:94-102. [PMID: 23473881 DOI: 10.1016/j.bbr.2013.02.040] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 02/22/2013] [Accepted: 02/26/2013] [Indexed: 11/19/2022]
Abstract
Green tea (GT) displays strong anti-oxidant and anti-inflammatory properties mostly attributed to (-)-epigallocatechin-3-gallate (EGCG), while experiments focusing on other catechins are scarce. With the present work we intended to analyze the neuroprotective effects of prolonged consumption of a GT extract (GTE) rich in catechins but poor in EGCG and other GT bioactive components that could also afford benefit. The endpoints evaluated were aging-induced biochemical and morphological changes in the rat hippocampal formation (HF) and behavioral alterations. Male Wistar rats aged 12 months were treated with GTE until 19 months of age. This group of animals was compared with control groups aged 19 (C-19M) or 12 months (C-12M). We found that aging increased oxidative markers but GTE consumption protected proteins and lipids against oxidation. The age-associated increase in lipofuscin content and lysosomal volume was also prevented by treatment with GTE. The dendritic arborizations of dentate granule cells of GTE-treated animals presented plastic changes accompanied by an improved spatial learning evaluated with the Morris water maze. Altogether our results demonstrate that the consumption of an extract rich in catechins other than EGCG protected the HF from aging-related declines contributing to improve the redox status and preventing the structural damage observed in old animals, with repercussions on behavioral performance.
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Affiliation(s)
- Jorge Rodrigues
- Department of Anatomy, Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, Porto, Portugal
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