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Bánáti D, Hellman-Regen J, Mack I, Young HA, Benton D, Eggersdorfer M, Rohn S, Dulińska-Litewka J, Krężel W, Rühl R. Defining a vitamin A5/X specific deficiency - vitamin A5/X as a critical dietary factor for mental health. INT J VITAM NUTR RES 2024; 94:443-475. [PMID: 38904956 DOI: 10.1024/0300-9831/a000808] [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: 06/22/2024]
Abstract
A healthy and balanced diet is an important factor to assure a good functioning of the central and peripheral nervous system. Retinoid X receptor (RXR)-mediated signaling was identified as an important mechanism of transmitting major diet-dependent physiological and nutritional signaling such as the control of myelination and dopamine signalling. Recently, vitamin A5/X, mainly present in vegetables as provitamin A5/X, was identified as a new concept of a vitamin which functions as the nutritional precursor for enabling RXR-mediated signaling. The active form of vitamin A5/X, 9-cis-13,14-dehydroretinoic acid (9CDHRA), induces RXR-activation, thereby acting as the central switch for enabling various heterodimer-RXR-signaling cascades involving various partner heterodimers like the fatty acid and eicosanoid receptors/peroxisome proliferator-activated receptors (PPARs), the cholesterol receptors/liver X receptors (LXRs), the vitamin D receptor (VDR), and the vitamin A(1) receptors/retinoic acid receptors (RARs). Thus, nutritional supply of vitamin A5/X might be a general nutritional-dependent switch for enabling this large cascade of hormonal signaling pathways and thus appears important to guarantee an overall organism homeostasis. RXR-mediated signaling was shown to be dependent on vitamin A5/X with direct effects for beneficial physiological and neuro-protective functions mediated systemically or directly in the brain. In summary, through control of dopamine signaling, amyloid β-clearance, neuro-protection and neuro-inflammation, the vitamin A5/X - RXR - RAR - vitamin A(1)-signaling might be "one of" or even "the" critical factor(s) necessary for good mental health, healthy brain aging, as well as for preventing drug addiction and prevention of a large array of nervous system diseases. Likewise, vitamin A5/X - RXR - non-RAR-dependent signaling relevant for myelination/re-myelination and phagocytosis/brain cleanup will contribute to such regulations too. In this review we discuss the basic scientific background, logical connections and nutritional/pharmacological expert recommendations for the nervous system especially considering the ageing brain.
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Affiliation(s)
- Diána Bánáti
- Department of Food Engineering, Faculty of Engineering, University of Szeged, Hungary
| | - Julian Hellman-Regen
- Department of Psychiatry, Charité-Campus Benjamin Franklin, Section Neurobiology, University Medicine Berlin, Germany
| | - Isabelle Mack
- Department of Psychosomatic Medicine and Psychotherapy, University Hospital Tübingen, Germany
| | - Hayley A Young
- Faculty of Medicine, Health and Life Sciences, Swansea University, UK
| | - David Benton
- Faculty of Medicine, Health and Life Sciences, Swansea University, UK
| | - Manfred Eggersdorfer
- Department of Healthy Ageing, University Medical Center Groningen (UMCG), The Netherlands
| | - Sascha Rohn
- Department of Food Chemistry and Analysis, Institute of Food Technology and Food Chemistry, Technische Universität Berlin, Germany
| | | | - Wojciech Krężel
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Inserm U1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France
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Almaguer J, Hindle A, Lawrence JJ. The Contribution of Hippocampal All-Trans Retinoic Acid (ATRA) Deficiency to Alzheimer's Disease: A Narrative Overview of ATRA-Dependent Gene Expression in Post-Mortem Hippocampal Tissue. Antioxidants (Basel) 2023; 12:1921. [PMID: 38001775 PMCID: PMC10669734 DOI: 10.3390/antiox12111921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/04/2023] [Accepted: 10/05/2023] [Indexed: 11/26/2023] Open
Abstract
There is accumulating evidence that vitamin A (VA) deficiency contributes to the pathogenesis and progression of Alzheimer's disease (AD). All-trans retinoic acid (ATRA), a metabolite of VA in the brain, serves distinct roles in the human hippocampus. Agonists of retinoic acid receptors (RAR), including ATRA, promote activation of the non-amyloidogenic pathway by enhancing expression of α-secretases, providing a mechanistic basis for delaying/preventing amyloid beta (Aβ) toxicity. However, whether ATRA is actually deficient in the hippocampi of patients with AD is not clear. Here, using a publicly available human transcriptomic dataset, we evaluated the extent to which ATRA-sensitive genes are dysregulated in hippocampal tissue from post-mortem AD brains, relative to age-matched controls. Consistent with ATRA deficiency, we found significant dysregulation of many ATRA-sensitive genes and significant upregulation of RAR co-repressors, supporting the idea of transcriptional repression of ATRA-mediated signaling. Consistent with oxidative stress and neuroinflammation, Nrf2 and NfkB transcripts were upregulated, respectively. Interestingly, transcriptional targets of Nrf2 were not upregulated, accompanied by upregulation of several histone deacetylases. Overall, our investigation of ATRA-sensitive genes in the human hippocampus bolsters the scientific premise of ATRA depletion in AD and that epigenetic factors should be considered and addressed as part of VA supplementation.
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Affiliation(s)
- Joey Almaguer
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA;
| | - Ashly Hindle
- Department of Pharmacology and Neuroscience and Garrison Institute on Aging, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA;
| | - J. Josh Lawrence
- Department of Pharmacology and Neuroscience, Garrison Institute on Aging, Center of Excellence for Translational Neuroscience and Therapeutics, and Center of Excellence for Integrated Health, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
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Marie A, Kinet R, Helbling JC, Darricau M, Alfos S, Di Miceli M, Angelo MF, Foury A, Richard E, Trifilieff P, Mallet NP, Bosch-Bouju C. Impact of dietary vitamin A on striatal function in adult rats. FASEB J 2023; 37:e23037. [PMID: 37392372 DOI: 10.1096/fj.202300133r] [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: 01/25/2023] [Revised: 04/18/2023] [Accepted: 06/05/2023] [Indexed: 07/03/2023]
Abstract
The striatum is a brain structure involved in the control of voluntary movement. Striatum contains high amounts of retinoic acid, the active metabolite of vitamin A, as well as retinoid receptors, RARβ and RXRγ. Previous studies revealed that disruption of retinoid signaling initiated during development is deleterious for striatal physiology and related motor functions. However, the alteration of retinoid signaling, and the importance of vitamin A supply during adulthood on striatal physiology and function has never been established. In the present study, we investigated the impact of vitamin A supply on striatal function. Adult Sprague-Dawley rats were fed with three specific diets, either sub-deficient, sufficient, or enriched in vitamin A (0.4, 5, and 20 international units [IU] of retinol per g of diet, respectively) for 6 months. We first validated that vitamin A sub-deficient diet in adult rats constitutes a physiological model of retinoid signaling reduction in the striatum. We then revealed subtle alterations of fine motor skills in sub-deficient rats using a new behavioral apparatus specifically designed to test forepaw reach-and-grasp skills relying on striatal function. Finally, we showed using qPCR analysis and immunofluorescence that the striatal dopaminergic system per se was not affected by vitamin A sub-deficiency at adult age. Rather, cholinergic synthesis in the striatum and μ-opioid receptor expression in striosomes sub-territories were the most affected by vitamin A sub-deficiency starting at adulthood. Taken together these results revealed that retinoid signaling alteration at adulthood is associated with motor learning deficits together with discrete neurobiological alterations in the striatum.
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Affiliation(s)
- Anaïs Marie
- INRAE, Bordeaux INP, NutriNeuro, UMR 1286, University of Bordeaux, Bordeaux, France
| | - Rémi Kinet
- Institut des Maladies Neurodégénératives, UMR 5293, University of Bordeaux, Bordeaux, France
- CNRS UMR 5293, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France
| | | | - Morgane Darricau
- INRAE, Bordeaux INP, NutriNeuro, UMR 1286, University of Bordeaux, Bordeaux, France
- Institut des Maladies Neurodégénératives, UMR 5293, University of Bordeaux, Bordeaux, France
- CNRS UMR 5293, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France
| | - Serge Alfos
- INRAE, Bordeaux INP, NutriNeuro, UMR 1286, University of Bordeaux, Bordeaux, France
| | - Mathieu Di Miceli
- Worcester Biomedical Research Group, School of Science and the Environment, University of Worcester, Worcester, UK
| | | | - Aline Foury
- INRAE, Bordeaux INP, NutriNeuro, UMR 1286, University of Bordeaux, Bordeaux, France
| | - Emmanuel Richard
- INSERM, U1035, CHU Bordeaux, University of Bordeaux, Bordeaux, France
| | - Pierre Trifilieff
- INRAE, Bordeaux INP, NutriNeuro, UMR 1286, University of Bordeaux, Bordeaux, France
| | - Nicolas P Mallet
- Institut des Maladies Neurodégénératives, UMR 5293, University of Bordeaux, Bordeaux, France
- CNRS UMR 5293, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France
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Svirsky SE, Ranellone NS, Parry M, Holets E, Henchir J, Li Y, Carlson SW, Edward Dixon C. All-trans Retinoic Acid has Limited Therapeutic Effects on Cognition and Hippocampal Protein Expression After Controlled Cortical Impact. Neuroscience 2022; 499:130-141. [PMID: 35878718 DOI: 10.1016/j.neuroscience.2022.07.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 07/15/2022] [Accepted: 07/18/2022] [Indexed: 10/17/2022]
Abstract
Traumatic brain injury (TBI) is known to impair synaptic function, and subsequently contribute to observed cognitive deficits. Retinoic Acid (RA) signaling modulates expression of synaptic plasticity proteins and is involved in hippocampal learning and memory. All trans-retinoic acid (ATRA), a metabolite of Vitamin A, has been identified as a potential pharmacotherapeutic for other neurological disorders due to this role. This study conducted an ATRA dose response to determine its therapeutic effects on cognitive behaviors and expression of hippocampal markers of synaptic plasticity and RA signaling proteins after experimental TBI. Under isoflurane anesthesia, adult male Sprague Dawley rats received either controlled cortical impact (CCI, 2.5 mm deformation, 4 m/s) or control surgery. Animals received daily intraperitoneal injection of 0.5, 1, 5, or 10 mg/kg of ATRA or vehicle for 2 weeks. Animals underwent motor and spatial learning and memory testing. Hippocampal expression of synaptic plasticity proteins neurogranin (Ng), and α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor GluA1 sub-unit, as well as RA signaling proteins STRA6, ADLH1a1, CYP26A1 and CYP26B1 were evaluated by western blot at 2-weeks post-injury. ATRA treatment significantly recovered Ng synaptic protein expression, while having no effect on motor performance, spatial learning, and memory, and GluA1 expression after TBI. RA signaling protein expression is unchanged 2 weeks after TBI. Overall, ATRA administration after TBI showed limited therapeutic benefits compared to the vehicle.
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Affiliation(s)
- Sarah E Svirsky
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA, USA; Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
| | - Nicholas S Ranellone
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
| | - Madison Parry
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
| | - Erik Holets
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
| | - Jeremy Henchir
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
| | - Youming Li
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
| | - Shaun W Carlson
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
| | - C Edward Dixon
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA, USA; Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA; V.A. Pittsburgh Healthcare System, Pittsburgh, Pennsylvania, USA.
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Pupier E, Santos A, Etchamendy N, Lavielle A, Ferriere A, Marighetto A, Resmini E, Cota D, Webb SM, Tabarin A. Impaired quality of life, but not cognition, is linked to a history of chronic hypercortisolism in patients with Cushing's disease in remission. Front Endocrinol (Lausanne) 2022; 13:934347. [PMID: 36004342 PMCID: PMC9393704 DOI: 10.3389/fendo.2022.934347] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 07/15/2022] [Indexed: 11/13/2022] Open
Abstract
CONTEXT Impaired cognition and altered quality of life (QoL) may persist despite long-term remission of Cushing's disease (CD). Persistent comorbidities and treatment modalities may account for cognitive impairments. Therefore, the role of hypercortisolism per se on cognitive sequelae remains debatable. OBJECTIVE To investigate whether memory and QoL are impaired after long-term remission of CD in patients with no confounding comorbidity. DESIGN AND SETTING Cross-sectional case-control study in two tertiary referral centers. PATIENTS 25 patients (44.5 ± 2.4 years) in remission from CD for 102.7 ± 19.3 Mo and 25 well-matched controls, without comorbidity or treatment liable to impair cognition. MAIN OUTCOME MEASURES Hippocampus- and prefrontal cortex-dependent memory, including memory flexibility and working memory, were investigated using multiple tests including sensitive locally-developed computerized tasks. Depression and anxiety were evaluated with the MADRS and HADS questionnaires. QoL was evaluated with the SF-36 and CushingQoL questionnaires. The intensity of CD was assessed using mean urinary free cortisol and a score for clinical symptoms. RESULTS CD patients displayed similar performance to controls in all cognitive tests. In contrast, despite the absence of depression and a minimal residual clinical Cushing score, patients had worse QoL. Most of the SF36 subscales and the CushingQoL score were negatively associated only with the duration of exposure to hypercortisolism (p≤ 0.01 to 0.001). CONCLUSIONS Persistent comorbidities can be a primary cause of long-lasting cognitive impairment and should be actively treated. Persistently altered QoL may reflect irreversible effects of hypercortisolism, highlighting the need to reduce its duration. CLINICAL TRIAL REGISTRATION NUMBER https://clinicaltrials.gov, identifier NCT02603653.
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Affiliation(s)
- Emilie Pupier
- Department of Endocrinology, Diabetes and Nutrition, CHU of Bordeaux and University of Bordeaux, Pessac, France
| | - Alicia Santos
- Endocrinology Department, Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, Unidad 747) Instituto de Salud Carlos III (ISCIII), Barcelona, Spain
- Department Medicine, Research Center for Pituitary Diseases, Hospital Sant Pau, Institut d'Investigació Biomèdica (IIB)-Sant Pau, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain
| | - Nicole Etchamendy
- Neurocentre Magendie, University of Bordeaux, Institut National de la Santé et de la Recherche Médicale (INSERM), Bordeaux, France
| | - Aurélie Lavielle
- Department of Endocrinology, Diabetes and Nutrition, CHU of Bordeaux and University of Bordeaux, Pessac, France
| | - Amandine Ferriere
- Department of Endocrinology, Diabetes and Nutrition, CHU of Bordeaux and University of Bordeaux, Pessac, France
| | - Aline Marighetto
- Neurocentre Magendie, University of Bordeaux, Institut National de la Santé et de la Recherche Médicale (INSERM), Bordeaux, France
| | - Eugenia Resmini
- Endocrinology Department, Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, Unidad 747) Instituto de Salud Carlos III (ISCIII), Barcelona, Spain
- Department Medicine, Research Center for Pituitary Diseases, Hospital Sant Pau, Institut d'Investigació Biomèdica (IIB)-Sant Pau, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain
| | - Daniela Cota
- Neurocentre Magendie, University of Bordeaux, Institut National de la Santé et de la Recherche Médicale (INSERM), Bordeaux, France
| | - Susan M. Webb
- Endocrinology Department, Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, Unidad 747) Instituto de Salud Carlos III (ISCIII), Barcelona, Spain
- Department Medicine, Research Center for Pituitary Diseases, Hospital Sant Pau, Institut d'Investigació Biomèdica (IIB)-Sant Pau, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain
| | - Antoine Tabarin
- Department of Endocrinology, Diabetes and Nutrition, CHU of Bordeaux and University of Bordeaux, Pessac, France
- Neurocentre Magendie, University of Bordeaux, Institut National de la Santé et de la Recherche Médicale (INSERM), Bordeaux, France
- *Correspondence: Antoine Tabarin,
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Chen BW, Zhang KW, Chen SJ, Yang C, Li PG. Vitamin A Deficiency Exacerbates Gut Microbiota Dysbiosis and Cognitive Deficits in Amyloid Precursor Protein/Presenilin 1 Transgenic Mice. Front Aging Neurosci 2021; 13:753351. [PMID: 34790112 PMCID: PMC8591312 DOI: 10.3389/fnagi.2021.753351] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/04/2021] [Indexed: 01/17/2023] Open
Abstract
Vitamin A deficiency (VAD) plays an essential role in the pathogenesis of Alzheimer’s disease (AD). However, the specific mechanism by which VAD aggravates cognitive impairment is still unknown. At the intersection of microbiology and neuroscience, the gut-brain axis is undoubtedly contributing to the formation and function of neurological systems, but most of the previous studies have ignored the influence of gut microbiota on the cognitive function in VAD. Therefore, we assessed the effect of VAD on AD pathology and the decline of cognitive function in AD model mice and determined the role played by the intestinal microbiota in the process. Twenty 8-week-old male C57BL/6J amyloid precursor protein/presenilin 1 (APP/PS1) transgenic mice were randomly assigned to either a vitamin A normal (VAN) or VAD diet for 45 weeks. Our results show that VAD aggravated the behavioral learning and memory deficits, reduced the retinol concentration in the liver and the serum, decreased the transcription of vitamin A (VA)-related receptors and VA-related enzymes in the cortex, increased amyloid-β peptides (Aβ40 and Aβ42) in the brain and gut, upregulate the translation of beta-site APP-cleaving enzyme 1 (BACE1) and phosphorylated Tau in the cortex, and downregulate the expression of brain-derived neurotrophic factor (BDNF) and γ-aminobutyric acid (GABA) receptors in the cortex. In addition, VAD altered the composition and functionality of the fecal microbiota as exemplified by a decreased abundance of Lactobacillus and significantly different α- and β-diversity. Of note, the functional metagenomic prediction (PICRUSt analysis) indicated that GABAergic synapse and retinol metabolism decreased remarkably after VAD intervention, which was in line with the decreased expression of GABA receptors and the decreased liver and serum retinol. In summary, the present study provided valuable facts that VAD exacerbated the morphological, histopathological, molecular biological, microbiological, and behavioral impairment in the APP/PS1 transgenic mice, and the intestinal microbiota may play a key mediator role in this mechanism.
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Affiliation(s)
- Bo-Wen Chen
- School of Public Health, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Environmental Toxicology, Beijing, China.,Beijing Key Laboratory of Clinical Epidemiology, Beijing, China
| | - Kai-Wen Zhang
- School of Public Health, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Environmental Toxicology, Beijing, China.,Beijing Key Laboratory of Clinical Epidemiology, Beijing, China
| | - Si-Jia Chen
- School of Public Health, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Environmental Toxicology, Beijing, China.,Beijing Key Laboratory of Clinical Epidemiology, Beijing, China
| | - Chun Yang
- School of Public Health, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Environmental Toxicology, Beijing, China.,Beijing Key Laboratory of Clinical Epidemiology, Beijing, China
| | - Peng-Gao Li
- School of Public Health, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Environmental Toxicology, Beijing, China.,Beijing Key Laboratory of Clinical Epidemiology, Beijing, China
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Biyong EF, Tremblay C, Leclerc M, Caron V, Alfos S, Helbling JC, Rodriguez L, Pernet V, Bennett DA, Pallet V, Calon F. Role of Retinoid X Receptors (RXRs) and dietary vitamin A in Alzheimer's disease: Evidence from clinicopathological and preclinical studies. Neurobiol Dis 2021; 161:105542. [PMID: 34737043 DOI: 10.1016/j.nbd.2021.105542] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 10/27/2021] [Accepted: 10/31/2021] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Vitamin A (VitA), via its active metabolite retinoic acid (RA), is critical for the maintenance of memory function with advancing age. Although its role in Alzheimer's disease (AD) is not well understood, data suggest that impaired brain VitA signaling is associated with the accumulation of β-amyloid peptides (Aβ), and could thus contribute to the onset of AD. METHODS We evaluated the protective action of a six-month-long dietary VitA-supplementation (20 IU/g), starting at 8 months of age, on the memory and the neuropathology of the 3xTg-AD mouse model of AD (n = 11-14/group; including 4-6 females and 7-8 males). We also measured protein levels of Retinoic Acid Receptor β (RARβ) and Retinoid X Receptor γ (RXRγ) in homogenates from the inferior parietal cortex of 60 participants of the Religious Orders study (ROS) divided in three groups: no cognitive impairment (NCI) (n = 20), mild cognitive impairment (MCI) (n = 20) and AD (n = 20). RESULTS The VitA-enriched diet preserved spatial memory of 3xTg-AD mice in the Y maze. VitA-supplementation affected hippocampal RXR expression in an opposite way according to sex by tending to increase in males and decrease in females their mRNA expression. VitA-enriched diet also reduced the amount of hippocampal Aβ40 and Aβ42, as well as the phosphorylation of tau protein at sites Ser396/Ser404 (PHF-1) in males. VitA-supplementation had no effect on tau phosphorylation in females but worsened their hippocampal Aβ load. However, the expression of Rxr-β in the hippocampus was negatively correlated with the amount of both soluble and insoluble Aβ in both males and females. Western immunoblotting in the human cortical samples of the ROS study did not reveal differences in RARβ levels. However, it evidenced a switch from a 60-kDa-RXRγ to a 55-kDa-RXRγ in AD, correlating with ante mortem cognitive decline and the accumulation of neuritic plaques in the brain cortex. CONCLUSION Our data suggest that (i) an altered expression of RXRs receptors is a contributor to β-amyloid pathology in both humans and 3xTg-AD mice, (ii) a chronic exposure of 3xTg-AD mice to a VitA-enriched diet may be protective in males, but not in females.
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Affiliation(s)
- Essi F Biyong
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France; Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Centre de recherche du CHU de Québec-Université Laval (CHUL), Axe Neurosciences, 2705 Boulevard Laurier, Québec, Québec, Canada; Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Québec, Québec, Canada; LIA OptiNutriBrain - Laboratoire International Associé (NutriNeuro France-INAF Canada), Canada
| | - Cyntia Tremblay
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Centre de recherche du CHU de Québec-Université Laval (CHUL), Axe Neurosciences, 2705 Boulevard Laurier, Québec, Québec, Canada
| | - Manon Leclerc
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Centre de recherche du CHU de Québec-Université Laval (CHUL), Axe Neurosciences, 2705 Boulevard Laurier, Québec, Québec, Canada
| | - Vicky Caron
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Centre de recherche du CHU de Québec-Université Laval (CHUL), Axe Neurosciences, 2705 Boulevard Laurier, Québec, Québec, Canada
| | - Serge Alfos
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | | | - Léa Rodriguez
- CUO-Recherche, Centre de Recherche du CHU de Québec, Québec, QC, Canada; Département d'ophtalmologie, Faculté de Médecine, Université Laval, Québec, QC, Canada
| | - Vincent Pernet
- CUO-Recherche, Centre de Recherche du CHU de Québec, Québec, QC, Canada; Département d'ophtalmologie, Faculté de Médecine, Université Laval, Québec, QC, Canada
| | - David A Bennett
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA
| | - Véronique Pallet
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France; LIA OptiNutriBrain - Laboratoire International Associé (NutriNeuro France-INAF Canada), Canada
| | - Frédéric Calon
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Centre de recherche du CHU de Québec-Université Laval (CHUL), Axe Neurosciences, 2705 Boulevard Laurier, Québec, Québec, Canada; Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Québec, Québec, Canada; LIA OptiNutriBrain - Laboratoire International Associé (NutriNeuro France-INAF Canada), Canada.
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Wołoszynowska-Fraser MU, Kouchmeshky A, McCaffery P. Vitamin A and Retinoic Acid in Cognition and Cognitive Disease. Annu Rev Nutr 2021; 40:247-272. [PMID: 32966186 DOI: 10.1146/annurev-nutr-122319-034227] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The history of vitamin A goes back over one hundred years, but our realization of its importance for the brain and cognition is much more recent. The brain is more efficient than other target tissues at converting vitamin A to retinoic acid (RA), which activates retinoic acid receptors (RARs). RARs regulate transcription, but their function in the cytoplasm to control nongenomic actions is also crucial. Controlled synthesis of RA is essential for regulating synaptic plasticity in regions of the brain involved in learning and memory, such as the hippocampus. Vitamin A deficiency results in a deterioration of these functions, and failure of RA signaling is perhaps associated with normal cognitive decline with age as well as with Alzheimer's disease. Further, several psychiatric and developmental disorders that disrupt cognition are also linked with vitamin A and point to their possible treatment with vitamin A or RA.
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Affiliation(s)
| | - Azita Kouchmeshky
- Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, Scotland, United Kingdom;
| | - Peter McCaffery
- Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, Scotland, United Kingdom;
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Abstract
While the uses of retinoids for cancer treatment continue to evolve, this review focuses on other therapeutic areas in which retinoids [retinol (vitamin A), all-trans retinoic acid (RA), and synthetic retinoic acid receptor (RAR)α-, β-, and γ-selective agonists] are being used and on promising new research that suggests additional uses for retinoids for the treatment of disorders of the kidneys, skeletal muscles, heart, pancreas, liver, nervous system, skin, and other organs. The most mature area, in terms of US Food and Drug Administration-approved, RAR-selective agonists, is for treatment of various skin diseases. Synthetic retinoid agonists have major advantages over endogenous RAR agonists such as RA. Because they act through a specific RAR, side effects may be minimized, and synthetic retinoids often have better pharmaceutical properties than does RA. Based on our increasing knowledge of the multiple roles of retinoids in development, epigenetic regulation, and tissue repair, other exciting therapeutic areas are emerging. Expected final online publication date for the Annual Review of Pharmacology and Toxicology, Volume 62 is January 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Lorraine J Gudas
- Department of Pharmacology, Weill Cornell Medicine, Cornell University, New York, NY 10021, USA;
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10
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Differential Retinoic Acid Signaling in the Hippocampus of Aged Rats with and without Memory Impairment. eNeuro 2021; 8:ENEURO.0120-21.2021. [PMID: 34417282 PMCID: PMC8442538 DOI: 10.1523/eneuro.0120-21.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 08/09/2021] [Accepted: 08/17/2021] [Indexed: 12/21/2022] Open
Abstract
Retinoic acid (RA), a metabolite of vitamin A, has many physiological functions, and mounting evidence points to important roles in cognition. In vitro experiments indicate that RA is involved in homeostatic synaptic scaling in the hippocampus, which supports overall network stability during learning. It has been previously determined that disrupted RA signaling in the hippocampus causes deterioration of memory, that RA signaling declines with age in brain, and that application of RA reverses this decline. Here, we explore whether RA signaling is altered in an animal model of neurocognitive aging. We used a Morris water maze protocol to study cognitive decline in aged rats, which assesses hippocampus-dependent spatial memory and reveals substantial interindividual differences in aged animals. Aged unimpaired (AU) rats perform on par with young (Y), while aged impaired (AI) animals exhibit spatial memory deficits. We show that the major substrate for RA, retinol binding protein 4 (RBP4), is decreased in AU rats, and retinol cell surface receptor declines with chronological age. Other affected components of RA signaling include selective increases in AI animals in hippocampal synthesis (RALDH1) and catabolism of RA (CYP26B1), RA receptor α, the RA regulated ionotropic glutamate receptor (GluR1), as well as fragile X mental retardation protein (FMRP). The results support the conclusion that, surprisingly, increased RA signaling in the aged hippocampus is associated with poor cognitive outcome.
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11
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Lenz M, Kruse P, Eichler A, Straehle J, Beck J, Deller T, Vlachos A. All-trans retinoic acid induces synaptic plasticity in human cortical neurons. eLife 2021; 10:e63026. [PMID: 33781382 PMCID: PMC8009674 DOI: 10.7554/elife.63026] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 02/11/2021] [Indexed: 12/15/2022] Open
Abstract
A defining feature of the brain is the ability of its synaptic contacts to adapt structurally and functionally in an experience-dependent manner. In the human cortex, however, direct experimental evidence for coordinated structural and functional synaptic adaptation is currently lacking. Here, we probed synaptic plasticity in human cortical slices using the vitamin A derivative all-trans retinoic acid (atRA), a putative treatment for neuropsychiatric disorders such as Alzheimer's disease. Our experiments demonstrated that the excitatory synapses of superficial (layer 2/3) pyramidal neurons underwent coordinated structural and functional changes in the presence of atRA. These synaptic adaptations were accompanied by ultrastructural remodeling of the calcium-storing spine apparatus organelle and required mRNA translation. It was not observed in synaptopodin-deficient mice, which lack spine apparatus organelles. We conclude that atRA is a potent mediator of synaptic plasticity in the adult human cortex.
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Affiliation(s)
- Maximilian Lenz
- Department of Neuroanatomy, Institute of Anatomy and Cell Biology, Faculty of Medicine, University of FreiburgFreiburg im BreisgauGermany
| | - Pia Kruse
- Department of Neuroanatomy, Institute of Anatomy and Cell Biology, Faculty of Medicine, University of FreiburgFreiburg im BreisgauGermany
| | - Amelie Eichler
- Department of Neuroanatomy, Institute of Anatomy and Cell Biology, Faculty of Medicine, University of FreiburgFreiburg im BreisgauGermany
| | - Jakob Straehle
- Department of Neurosurgery, Medical Center and Faculty of Medicine, University of FreiburgFreiburg im BreisgauGermany
| | - Jürgen Beck
- Department of Neurosurgery, Medical Center and Faculty of Medicine, University of FreiburgFreiburg im BreisgauGermany
- Center for Basics in Neuromodulation (NeuroModulBasics), Faculty of Medicine, University of FreiburgFreiburg im BreisgauGermany
| | - Thomas Deller
- Institute of Clinical Neuroanatomy, Dr. Senckenberg Anatomy, Neuroscience Center, Goethe-University FrankfurtFreiburg im BreisgauGermany
| | - Andreas Vlachos
- Department of Neuroanatomy, Institute of Anatomy and Cell Biology, Faculty of Medicine, University of FreiburgFreiburg im BreisgauGermany
- Center for Basics in Neuromodulation (NeuroModulBasics), Faculty of Medicine, University of FreiburgFreiburg im BreisgauGermany
- Center Brain Links Brain Tools, University of FreiburgFreiburg im BreisgauGermany
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12
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Dumetz F, Ginieis R, Bure C, Marie A, Alfos S, Pallet V, Bosch-Bouju C. Neuronal morphology and synaptic plasticity in the hippocampus of vitamin A deficient rats. Nutr Neurosci 2020; 25:779-790. [DOI: 10.1080/1028415x.2020.1809877] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Fabien Dumetz
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, Bordeaux, France
| | - Rachel Ginieis
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, Bordeaux, France
| | - Corinne Bure
- Univ. Bordeaux, CNRS, Bordeaux INP, CBMN, UMR 5248, Pessac, France
| | - Anaïs Marie
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, Bordeaux, France
| | - Serge Alfos
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, Bordeaux, France
| | - Véronique Pallet
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, Bordeaux, France
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13
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Retinoic acid and depressive disorders: Evidence and possible neurobiological mechanisms. Neurosci Biobehav Rev 2020; 112:376-391. [DOI: 10.1016/j.neubiorev.2020.02.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 02/09/2020] [Accepted: 02/11/2020] [Indexed: 12/13/2022]
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14
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Merino-Serrais P, Loera-Valencia R, Rodriguez-Rodriguez P, Parrado-Fernandez C, Ismail MA, Maioli S, Matute E, Jimenez-Mateos EM, Björkhem I, DeFelipe J, Cedazo-Minguez A. 27-Hydroxycholesterol Induces Aberrant Morphology and Synaptic Dysfunction in Hippocampal Neurons. Cereb Cortex 2020; 29:429-446. [PMID: 30395175 PMCID: PMC6294414 DOI: 10.1093/cercor/bhy274] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 10/04/2018] [Indexed: 12/11/2022] Open
Abstract
Hypercholesterolemia is a risk factor for neurodegenerative diseases, but how high blood cholesterol levels are linked to neurodegeneration is still unknown. Here, we show that an excess of the blood-brain barrier permeable cholesterol metabolite 27-hydroxycholesterol (27-OH) impairs neuronal morphology and reduces hippocampal spine density and the levels of the postsynaptic protein PSD95. Dendritic spines are the main postsynaptic elements of excitatory synapses and are crucial structures for memory and cognition. Furthermore, PSD95 has an essential function for synaptic maintenance and plasticity. PSD95 synthesis is controlled by the REST-miR124a-PTBP1 axis. Here, we report that high levels of 27-OH induce REST-miR124a-PTBP1 axis dysregulation in a possible RxRγ-dependent manner, suggesting that 27-OH reduces PSD95 levels through this mechanism. Our results reveal a possible molecular link between hypercholesterolemia and neurodegeneration. We discuss the possibility that reduction of 27-OH levels could be a useful strategy for preventing memory and cognitive decline in neurodegenerative disorders.
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Affiliation(s)
- Paula Merino-Serrais
- Division of Neurogeriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Raul Loera-Valencia
- Division of Neurogeriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Patricia Rodriguez-Rodriguez
- Division of Neurogeriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Cristina Parrado-Fernandez
- Division of Neurogeriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Muhammad A Ismail
- Division of Neurogeriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden.,Department of Neurology, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Silvia Maioli
- Division of Neurogeriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Eduardo Matute
- Division of Neurogeriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Eva Maria Jimenez-Mateos
- Department of Physiology and Medical Physics Royal, College of Surgeons in Ireland, 123 St. Stephen's Green, Dublin 2, Ireland
| | - Ingemar Björkhem
- Division of Clinical Chemistry, Department of Laboratory Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Javier DeFelipe
- Laboratorio Cajal de Circuitos Corticales (CTB), Universidad Politécnica de Madrid, Madrid, Spain.,Instituto Cajal, CSIC, Madrid, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), ISCIII, Madrid, Spain
| | - Angel Cedazo-Minguez
- Division of Neurogeriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
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15
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Lu TT, Wan C, Yang W, Cai Z. Role of Cdk5 in Amyloid-beta Pathology of Alzheimer’s Disease. Curr Alzheimer Res 2020; 16:1206-1215. [PMID: 31820699 DOI: 10.2174/1567205016666191210094435] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 11/29/2019] [Accepted: 12/09/2019] [Indexed: 12/14/2022]
Abstract
Alzheimer’s Disease (AD) is a progressive neurodegenerative disease with irreversible cognitive
impairment. So far, successful treatment and prevention for this disease are deficient in spite of delaying
the progression of cognitive impairment and dementia. Cyclin dependent kinase 5 (Cdk5), a
unique member of the cyclin-dependent kinase family, is involved in AD pathogenesis and may be a
pathophysiological mediator that links the major pathological features of AD. Cdk5 dysregulation interferes
with the proteolytic processing of Amyloid-beta Protein Precursor (APP) and modulates amyloidbeta
(Aβ) by affecting three enzymes called α-, β- and γ-secretase, which are critical for the hydrolysis
of APP. Given that the accumulation and deposition of Aβ derived from APP are a common hinge point
in the numerous pathogenic hypotheses of AD, figuring out that influence of specific mechanisms of
Cdk5 on Aβ pathology will deepen our understanding of AD.
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Affiliation(s)
- Tao-Tao Lu
- Department of Neurology, Chongqing General Hospital, University of Chinese Academy of Sciences, 400013, Chongqing, China
| | - Chengqun Wan
- Department of Neurology, Chongqing General Hospital, University of Chinese Academy of Sciences, 400013, Chongqing, China
| | - Wenming Yang
- Departmentof Neurology, The First Affiliated Hospital of Anhui University of Chinese Medicine, Hefei, 230031 Anhui Province, China
| | - Zhiyou Cai
- Department of Neurology, Chongqing General Hospital, University of Chinese Academy of Sciences, 400013, Chongqing, China
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16
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Dumetz F, Buré C, Alfos S, Bonneu M, Richard E, Touyarot K, Marie A, Schmitter JM, Bosch-Bouju C, Pallet V. Normalization of hippocampal retinoic acid level corrects age-related memory deficits in rats. Neurobiol Aging 2020; 85:1-10. [DOI: 10.1016/j.neurobiolaging.2019.09.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 09/19/2019] [Accepted: 09/21/2019] [Indexed: 12/12/2022]
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17
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Khatib T, Chisholm DR, Whiting A, Platt B, McCaffery P. Decay in Retinoic Acid Signaling in Varied Models of Alzheimer's Disease and In-Vitro Test of Novel Retinoic Acid Receptor Ligands (RAR-Ms) to Regulate Protective Genes. J Alzheimers Dis 2020; 73:935-954. [PMID: 31884477 PMCID: PMC7081102 DOI: 10.3233/jad-190931] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/14/2019] [Indexed: 12/22/2022]
Abstract
Retinoic acid has been previously proposed in the treatment of Alzheimer's disease (AD). Here, five transgenic mouse models expressing AD and frontotemporal dementia risk genes (i.e., PLB2APP, PLB2TAU, PLB1Double, PLB1Triple, and PLB4) were used to investigate if consistent alterations exist in multiple elements of the retinoic acid signaling pathway in these models. Many steps of the retinoic acid signaling pathway including binding proteins and metabolic enzymes decline, while the previously reported increase in RBP4 was only consistent at late (6 months) but not early (3 month) ages. The retinoic acid receptors were exceptional in their consistent decline in mRNA and protein with transcript decline of retinoic acid receptors β and γ by 3 months, before significant pathology, suggesting involvement in early stages of disease. Decline in RBP1 transcript may also be an early but not late marker of disease. The decline in the retinoic acid signaling system may therefore be a therapeutic target for AD and frontotemporal dementia. Thus, novel stable retinoic acid receptor modulators (RAR-Ms) activating multiple genomic and non-genomic pathways were probed for therapeutic control of gene expression in rat primary hippocampal and cortical cultures. RAR-Ms promoted the non-amyloidogenic pathway, repressed lipopolysaccharide induced inflammatory genes and induced genes with neurotrophic action. RAR-Ms had diverse effects on gene expression allowing particular RAR-Ms to be selected for maximal therapeutic effect. Overall the results demonstrated the early decline of retinoic acid signaling in AD and frontotemporal dementia models and the activity of stable and potent alternatives to retinoic acid as potential therapeutics.
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Affiliation(s)
- Thabat Khatib
- Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen, Scotland, UK
| | - David R. Chisholm
- Department of Chemistry, Durham University, Science Laboratories, South Road, Durham, UK
| | - Andrew Whiting
- Department of Chemistry, Durham University, Science Laboratories, South Road, Durham, UK
| | - Bettina Platt
- Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen, Scotland, UK
| | - Peter McCaffery
- Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen, Scotland, UK
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18
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Bonhomme D, Alfos S, Webster SP, Wolff M, Pallet V, Touyarot K. Vitamin A deficiency impairs contextual fear memory in rats: Abnormalities in the glucocorticoid pathway. J Neuroendocrinol 2019; 31:e12802. [PMID: 31613407 DOI: 10.1111/jne.12802] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 10/02/2019] [Accepted: 10/09/2019] [Indexed: 12/21/2022]
Abstract
Vitamin A and its active metabolite, retinoic acid (RA), play a key role in the maintenance of cognitive functions in the adult brain. Depletion of RA using the vitamin A deficiency (VAD) model in Wistar rats leads to spatial memory deficits in relation to elevated intrahippocampal basal corticosterone (CORT) levels and increased hippocampal 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) activity. All of these effects are normalised by vitamin A supplementation. However, it is unknown whether vitamin A status also modulates contextual fear conditioning (CFC) in a glucocorticoid-associated fear memory task dependent on the functional integrity of the hippocampus. In the present study, we investigated the impact of VAD and vitamin A supplementation in adult male rats on fear memory processing, plasma CORT levels, hippocampal retinoid receptors and 11β-HSD1 expression following a novelty-induced stress. We also examined whether vitamin A supplementation or a single injection of UE2316, a selective 11β-HSD1 inhibitor, known to modulate local glucocorticoid levels, had any beneficial effects on contextual fear memory and biochemical parameters in VAD rats. We provide evidence that VAD rats exhibit a decreased fear conditioning response during training with a poor contextual fear memory 24 hours later. These VAD-induced cognitive impairments are associated with elevated plasma CORT levels under basal conditions, as well as following a stressful event, with saturated CORT release, altered hippocampal retinoid receptors and 11β-HSD1 expression. Vitamin A supplementation normalises VAD-induced fear conditioning training deficits and all biochemical effects, although it cannot prevent fear memory deficits. Moreover, a single injection of UE2316 not only impairs contextual fear memory, but also reduces plasma CORT levels, regardless of the vitamin A status and decreases slightly hippocampal 11β-HSD1 activity in VAD rats following stress. The present study highlights the importance of vitamin A status with respect to modulating fear memory conditioning in relation to plasma CORT levels and hippocampal 11β-HSD1.
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Affiliation(s)
- Damien Bonhomme
- UMR 1286, Nutrition et Neurobiologie Intégrée, Université de Bordeaux, Bordeaux, France
- Nutrition et Neurobiologie Intégrée, UMR 1286, Institut National de la Recherche Agronomique (INRA), Bordeaux, France
| | - Serge Alfos
- UMR 1286, Nutrition et Neurobiologie Intégrée, Université de Bordeaux, Bordeaux, France
- Nutrition et Neurobiologie Intégrée, UMR 1286, Institut National de la Recherche Agronomique (INRA), Bordeaux, France
- Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux INP, Bordeaux, France
| | - Scott P Webster
- The Queen's Medical Research Institute, Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Mathieu Wolff
- UMR 5287, CNRS, INCIA, Bordeaux, France
- UMR 5287, INCIA, Université de Bordeaux, Bordeaux, France
| | - Véronique Pallet
- UMR 1286, Nutrition et Neurobiologie Intégrée, Université de Bordeaux, Bordeaux, France
- Nutrition et Neurobiologie Intégrée, UMR 1286, Institut National de la Recherche Agronomique (INRA), Bordeaux, France
- Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux INP, Bordeaux, France
| | - Katia Touyarot
- UMR 1286, Nutrition et Neurobiologie Intégrée, Université de Bordeaux, Bordeaux, France
- Nutrition et Neurobiologie Intégrée, UMR 1286, Institut National de la Recherche Agronomique (INRA), Bordeaux, France
- Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux INP, Bordeaux, France
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19
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Fahami A, Fathi M. Development of cress seed mucilage/PVA nanofibers as a novel carrier for vitamin A delivery. Food Hydrocoll 2018. [DOI: 10.1016/j.foodhyd.2018.02.008] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Sellami A, Abed ASA, Brayda-Bruno L, Etchamendy N, Valério S, Oulé M, Pantaléon L, Lamothe V, Potier M, Bernard K, Jabourian M, Herry C, Mons N, Marighetto A. Protocols to Study Declarative Memory Formation in Mice and Humans:Optogenetics and Translational Behavioral Approaches. Bio Protoc 2018; 8:e2888. [PMID: 34285997 PMCID: PMC8275238 DOI: 10.21769/bioprotoc.2888] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 05/20/2018] [Accepted: 05/21/2018] [Indexed: 11/02/2022] Open
Abstract
Declarative memory formation depends on the hippocampus and declines in aging. Two functions of the hippocampus, temporal binding and relational organization (Rawlins and Tsaltas, 1983; Eichenbaum et al., 1992 ; Cohen et al., 1997 ), are known to decline in aging (Leal and Yassa, 2015). However, in the literature distinct procedures have been used to study these two functions. Here, we describe the experimental procedures used to investigate how these two processes are related in the formation of declarative memory and how they are compromised in aging ( Sellami et al., 2017 ). First, we studied temporal binding using a one-trial learning procedure: trace fear conditioning. It is classical Pavlovian conditioning requiring temporal binding since a brief temporal gap separates the conditioned stimulus (CS) and unconditioned stimulus (US) presentations. We combined the trace fear condition procedure with an optogenetic approach, and we showed that the temporal binding relies on dorsal (d)CA1 activity over temporal gaps. Then, we studied the interaction between temporal binding and relational organization in declarative memory formation using a two-phase radial-maze task in mice and its virtual analog in humans. The behavioral procedure comprises an initial learning phase where subjects learned the constant rewarding /no rewarding valence of each arm, followed by a test phase where the reward contingencies among the arms remained unchanged but where the arms were recombined to assess flexibility, a cardinal property of declarative memory. We demonstrated that dCA1-dependent temporal binding is necessary for the development of a relational organization of memories that allows flexible declarative memory expression. Furthermore, in aging, the degradation of declarative memory is due to a reduction of temporal binding capacity that prevents relation organization.
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Affiliation(s)
- Azza Sellami
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, INSERM, Bordeaux, France
- Université de Bordeaux, Bordeaux, France
| | - Alice Shaam Al Abed
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, INSERM, Bordeaux, France
- Université de Bordeaux, Bordeaux, France
| | - Laurent Brayda-Bruno
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, INSERM, Bordeaux, France
- Université de Bordeaux, Bordeaux, France
| | - Nicole Etchamendy
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, INSERM, Bordeaux, France
- Université de Bordeaux, Bordeaux, France
| | - Stéphane Valério
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, INSERM, Bordeaux, France
- Université de Bordeaux, Bordeaux, France
| | - Marie Oulé
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, INSERM, Bordeaux, France
- Université de Bordeaux, Bordeaux, France
| | - Laura Pantaléon
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, INSERM, Bordeaux, France
- Université de Bordeaux, Bordeaux, France
| | - Valérie Lamothe
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, INSERM, Bordeaux, France
- Université de Bordeaux, Bordeaux, France
| | - Mylène Potier
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, INSERM, Bordeaux, France
- Université de Bordeaux, Bordeaux, France
| | - Katy Bernard
- Institut de Recherche Internationale Servier, Suresnes, France
| | | | - Cyril Herry
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, INSERM, Bordeaux, France
- Université de Bordeaux, Bordeaux, France
| | - Nicole Mons
- Université de Bordeaux, Bordeaux, France
- Institut de Neurosciences Cognitives et Intégratives d’Aquitaine, UMR 5287, CNRS, Pessac, France
| | - Aline Marighetto
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, INSERM, Bordeaux, France
- Université de Bordeaux, Bordeaux, France
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21
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Dheer Y, Chitranshi N, Gupta V, Abbasi M, Mirzaei M, You Y, Chung R, Graham SL, Gupta V. Bexarotene Modulates Retinoid-X-Receptor Expression and Is Protective Against Neurotoxic Endoplasmic Reticulum Stress Response and Apoptotic Pathway Activation. Mol Neurobiol 2018; 55:9043-9056. [PMID: 29637440 DOI: 10.1007/s12035-018-1041-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 03/27/2018] [Indexed: 12/21/2022]
Abstract
Retinoid X-receptors (RXRs) are members of the ligand-dependent transcription factor family of nuclear receptors that have gained recent research focus as potential targets for neurodegenerative disorders. Bexarotene is an RXR pharmacological agonist that is shown to be neuroprotective through its effects in promoting amyloid beta (Aβ) uptake by the glial cells in the brain. This study aimed to evaluate the dose-dependent effects of bexarotene on RXR expression in SH-SY5Y neuroblastoma cells and validate the drug effects in the brain in vivo. The protein expression studies were carried out using a combination of various drug treatment paradigms followed by expression analysis using Western blotting and immunofluorescence. Our study demonstrated that bexarotene promoted the expression of RXR α, β and γ isoforms at optimal concentrations in the cells and in the mice brain. Interestingly, a decreased RXR expression was identified in Alzheimer's disease mouse model and in the cells that were treated with Aβ. Bexarotene treatment not only rescued the RXR expression loss caused by Aβ treatment (p < 0.05) but also protected the cells against Aβ-induced ER stress (p < 0.05) and pro-apoptotic BAD protein activation (p < 0.05). In contrast, higher concentrations of bexarotene upregulated the ER stress proteins and led to BAD activation. Our study revealed that these downstream neurotoxic effects of high drug concentrations could be prevented by pharmacological targeting of the TrkB receptor. The ER stress and BAD activation induced by high concentrations of bexarotene were rescued by the TrkB agonist, 7,8 dihydroxyflavone (p < 0.05) while TrkB inhibitor CTX-B treatment further exacerbated these effects. Together, these findings suggest a cross-talk of TrkB signalling with downstream effects of bexarotene toxicity and indicate that therapeutic targeting of RXRs could prevent the Aβ-induced molecular neurotoxic effects.
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Affiliation(s)
- Yogita Dheer
- Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW, 2109, Australia.
| | - Nitin Chitranshi
- Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW, 2109, Australia
| | - Veer Gupta
- School of Medical Sciences, Edith Cowan University, Perth, Australia
| | - Mojdeh Abbasi
- Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW, 2109, Australia
| | - Mehdi Mirzaei
- Department of Chemistry and Biomolecular Sciences, Macquarie University, North Ryde, NSW, 2109, Australia
| | - Yuyi You
- Save Sight Institute, Sydney University, Sydney, NSW, 2000, Australia
| | - Roger Chung
- Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW, 2109, Australia
| | - Stuart L Graham
- Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW, 2109, Australia.,Save Sight Institute, Sydney University, Sydney, NSW, 2000, Australia
| | - Vivek Gupta
- Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW, 2109, Australia
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Bretin S, Krazem A, Henkous N, Froger-Colleaux C, Mocaer E, Louis C, Perdaems N, Marighetto A, Beracochea D. Synergistic enhancing-memory effect of donepezil and S 47445, an AMPA positive allosteric modulator, in middle-aged and aged mice. Psychopharmacology (Berl) 2018; 235:771-787. [PMID: 29167913 PMCID: PMC5847048 DOI: 10.1007/s00213-017-4792-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 11/14/2017] [Indexed: 11/30/2022]
Abstract
Positive allosteric modulators of AMPA receptors (AMPA-PAMs) are described to facilitate cognitive processes in different memory-based models. Among them, S 47445 is a novel potent and selective AMPA-PAM. In order to assess its efficacy after repeated administration, S 47445 effect was evaluated in two aging-induced memory dysfunction tasks in old mice, one short-term working memory model evaluated in a radial maze task and one assessing contextual memory performance. S 47445 was shown to improve cognition in both models sensitive to aging. In fact, administration of S 47445 at 0.3 mg/kg (s.c.) reversed the age-induced deficits of the working memory model whatever the retention interval. Moreover, in the contextual task, S 47445 also reversed the age-induced deficit at all tested doses (from 0.03 to 0.3 mg/kg, p.o.). Since donepezil, an acetylcholinesterase inhibitor, induces only moderate symptomatic effects on memory in Alzheimer's disease patients, an alternative strategy for treatment of cognitive symptoms could be to act simultaneously on both glutamatergic AMPA receptors and cholinergic pathways by combining pharmacological treatments. The present study further examined such effects by assessing combinations of S 47445 and donepezil given orally during 9 days in aged C57/Bl6J mice using contextual memory task (CSD) and the working memory model of serial alternation task (AT). Interestingly, a significant synergistic memory-enhancing effect was observed with the combination of donepezil at 0.1 mg/kg with S 47445 at 0.1 mg/kg p.o. in the CSD or with S 47445 at 0.1 and 0.3 mg/kg in AT in comparison to compounds given alone and without any pharmacokinetic interaction.
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Affiliation(s)
- S Bretin
- Institut de Recherches Internationales Servier, Pôle d'Innovation Thérapeutique Neuropsychiatrie, Suresnes, France
| | - A Krazem
- Institut de Neurosciences Cognitives et Intégratives d'Aquitaine (INCIA), Université de Bordeaux, UMR CNRS 5287, Allée Geoffroy Saint-Hilaire, Bat B2, 33613, Pessac, France
| | - N Henkous
- Institut de Neurosciences Cognitives et Intégratives d'Aquitaine (INCIA), Université de Bordeaux, UMR CNRS 5287, Allée Geoffroy Saint-Hilaire, Bat B2, 33613, Pessac, France
| | - C Froger-Colleaux
- Froger-Colleaux C, Porsolt Research Laboratory, Z.A de Glatiné, 53940, Le Genest-Saint-Isle, France
| | - E Mocaer
- Institut de Recherches Internationales Servier, Pôle d'Innovation Thérapeutique Neuropsychiatrie, Suresnes, France
| | - C Louis
- Institut de Recherches Servier, Pôle d'Innovation Thérapeutique Neuropsychiatrie, Croissy-Sur-Seine, France
| | - N Perdaems
- Pôle Expertise en Pharmacocinétique, Orléans, France
| | - A Marighetto
- INSERM, Neurocentre Magendie, Physiopathologie de la plasticité neuronale, U1215, 33077, Bordeaux, France
| | - D Beracochea
- Institut de Neurosciences Cognitives et Intégratives d'Aquitaine (INCIA), Université de Bordeaux, UMR CNRS 5287, Allée Geoffroy Saint-Hilaire, Bat B2, 33613, Pessac, France.
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Temporal binding function of dorsal CA1 is critical for declarative memory formation. Proc Natl Acad Sci U S A 2017; 114:10262-10267. [PMID: 28874586 PMCID: PMC5617244 DOI: 10.1073/pnas.1619657114] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Temporal binding, the process that enables association between discontiguous stimuli in memory, and relational organization, a process that enables the flexibility of declarative memories, are both hippocampus-dependent and decline in aging. However, how these two processes are related in supporting declarative memory formation and how they are compromised in age-related memory loss remain hypothetical. We here identify a causal link between these two features of declarative memory: Temporal binding is a necessary condition for the relational organization of discontiguous events. We demonstrate that the formation of a relational memory is limited by the capability of temporal binding, which depends on dorsal (d)CA1 activity over time intervals and diminishes in aging. Conversely, relational representation is successful even in aged individuals when the demand on temporal binding is minimized, showing that relational/declarative memory per se is not impaired in aging. Thus, bridging temporal intervals by dCA1 activity is a critical foundation of relational representation, and a deterioration of this mechanism is responsible for the age-associated memory impairment.
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del Pino I, Brotons-Mas JR, Marques-Smith A, Marighetto A, Frick A, Marín O, Rico B. Abnormal wiring of CCK + basket cells disrupts spatial information coding. Nat Neurosci 2017; 20:784-792. [PMID: 28394324 PMCID: PMC5446788 DOI: 10.1038/nn.4544] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Accepted: 03/13/2017] [Indexed: 12/13/2022]
Abstract
The function of cortical GABAergic interneurons is largely determined by their integration into specific neural circuits, but the mechanisms controlling the wiring of these cells remain largely unknown. This is particularly true for a major population of basket cells that express the neuropeptide cholecystokinin (CCK). Here we found that the tyrosine kinase receptor ErbB4 was required for the normal integration into cortical circuits of basket cells expressing CCK and vesicular glutamate transporter 3 (VGlut3). The number of inhibitory synapses made by CCK+VGlut3+ basket cells and the inhibitory drive they exerted on pyramidal cells were reduced in conditional mice lacking ErbB4. Developmental disruption of the connectivity of these cells diminished the power of theta oscillations during exploratory behavior, disrupted spatial coding by place cells, and caused selective alterations in spatial learning and memory in adult mice. These results suggest that normal integration of CCK+ basket cells in cortical networks is key to support spatial coding in the hippocampus.
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Affiliation(s)
- Isabel del Pino
- Centre for Developmental Neurobiology, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London SE1 1UL, United Kingdom
- Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas & Universidad Miguel Hernández, Sant Joan d’Alacant 03550, Spain
| | - Jorge R. Brotons-Mas
- Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas & Universidad Miguel Hernández, Sant Joan d’Alacant 03550, Spain
| | - André Marques-Smith
- Centre for Developmental Neurobiology, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London SE1 1UL, United Kingdom
- MRC Centre for Neurodevelopmental Disorders, King’s College London, London SE1 1UL, United Kingdom
| | | | - Andreas Frick
- Neurocentre Magendie INSERM U1215, 33077 Bordeaux, France
| | - Oscar Marín
- Centre for Developmental Neurobiology, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London SE1 1UL, United Kingdom
- Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas & Universidad Miguel Hernández, Sant Joan d’Alacant 03550, Spain
- MRC Centre for Neurodevelopmental Disorders, King’s College London, London SE1 1UL, United Kingdom
| | - Beatriz Rico
- Centre for Developmental Neurobiology, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London SE1 1UL, United Kingdom
- Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas & Universidad Miguel Hernández, Sant Joan d’Alacant 03550, Spain
- MRC Centre for Neurodevelopmental Disorders, King’s College London, London SE1 1UL, United Kingdom
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Zhang X, Yuan X, Chen L, Wei H, Chen J, Li T. The change in retinoic acid receptor signaling induced by prenatal marginal vitamin A deficiency and its effects on learning and memory. J Nutr Biochem 2017; 47:75-85. [PMID: 28570942 DOI: 10.1016/j.jnutbio.2017.05.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 04/29/2017] [Accepted: 05/16/2017] [Indexed: 01/08/2023]
Abstract
This study investigated the prenatal marginal vitamin A deficiency (mVAD)-related impairment in learning and memory and the interactions between RARα, Src and NR1. Learning and memory were assessed in adult rats that were exposed to prenatal mVAD with Morris water maze. The average escape time was longer in mVAD rats, and they passed the hidden platform fewer times during the memory retention test than normal vitamin A intake (VAN) rats. The mRNA and protein levels of RARα, Src and NR1 in mVAD rats were significantly lower than those in VAN rats. RARα and Src, but not NR1, were in the same protein complex. RA treatment-induced increase in RARα, Src and NR1 expressions in mVAD neurons was much lower than that in VAN neurons. Overexpression of RARα gene in VAN neurons induced an increase in RARα, Src and NR1 expressions, while silencing of RARα gene induced a decrease in expressions of RARα and Src, but not that of of NR1. In mVAD neurons, however, overexpression of RARα did not induce an increase in NR1 expression, while silencing of RARα gene had no effect on Src and NR1 expressions. Furthermore, inhibition of Src was associated with a decrease in NR1 expression but not that of RARα. Prenatal mVAD was associated with impaired learning and memory in adult rats. It is possible that mVAD-related decrease in RARα led to a decrease in Src expression, which in turn down-regulated NR1 expression and Ca2+ influx and eventually caused learning and memory deficits.
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Affiliation(s)
- Xuan Zhang
- Department of Primary Child Health Care, Children's Hospital of Chongqing Medical University, Chongqing, P.R. China; Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, P.R. China; China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, P.R. China
| | - Xingang Yuan
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, P.R. China; China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, P.R. China
| | - Lijun Chen
- Department of Nutrition, Southwest Hospital, Third Military Medical University, Chongqing, P.R. China
| | - Hua Wei
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, P.R. China; China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, P.R. China; Clinical Psychology Department, Children's Hospital of Chongqing Medical University, Chongqing, P.R. China
| | - Jie Chen
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, P.R. China; China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, P.R. China; Children's Nutrition Research Center, Chongqing, P.R. China
| | - Tingyu Li
- Department of Primary Child Health Care, Children's Hospital of Chongqing Medical University, Chongqing, P.R. China; Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, P.R. China; China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, P.R. China.
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Brossaud J, Roumes H, Helbling JC, Moisan MP, Pallet V, Ferreira G, Biyong EF, Redonnet A, Corcuff JB. Retinoic acid increases glucocorticoid receptor phosphorylation via cyclin-dependent kinase 5. Mol Cell Neurosci 2017; 82:96-104. [PMID: 28477983 DOI: 10.1016/j.mcn.2017.05.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 04/25/2017] [Accepted: 05/01/2017] [Indexed: 12/20/2022] Open
Abstract
Glucocorticoid receptor (GR) function is modulated by phosphorylation. As retinoic acid (RA) can activate some cytoplasmic kinases able to phosphorylate GR, we investigated whether RA could modulate GR phosphorylation in neuronal cells in a context of long-term glucocorticoid exposure. A 4-day treatment of dexamethasone (Dex) plus RA, showed that RA potentiated the (Dex)-induced phosphorylation on GR Serine 220 (pSer220GR) in the nucleus of a hippocampal HT22 cell line. This treatment increased the cytoplasmic ratio of p35/p25 proteins, which are major CDK5 cofactors. Roscovitine, a pharmacological CDK5 inhibitor, or a siRNA against CDK5 prevented RA potentiation of GR phosphorylation. Furthermore, roscovitine counter-acted the effect of RA on GR sensitive target proteins such as BDNF or tissue-transglutaminase. These data help understanding the interaction between RA- and glucocorticoid-signalling pathways, both of which have strong influences on the adult brain.
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Affiliation(s)
- Julie Brossaud
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, F-33076 Bordeaux, France; Departments of Nuclear Medicine University Hospital and University of Bordeaux, France.
| | - Hélène Roumes
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, F-33076 Bordeaux, France
| | | | - Marie-Pierre Moisan
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, F-33076 Bordeaux, France
| | - Véronique Pallet
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, F-33076 Bordeaux, France
| | - Guillaume Ferreira
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, F-33076 Bordeaux, France
| | - Essi-Fanny Biyong
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, F-33076 Bordeaux, France
| | - Anabelle Redonnet
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, F-33076 Bordeaux, France
| | - Jean-Benoît Corcuff
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, F-33076 Bordeaux, France; Departments of Nuclear Medicine University Hospital and University of Bordeaux, France
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27
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Létondor A, Buaud B, Vaysse C, Richard E, Layé S, Pallet V, Alfos S. EPA/DHA and Vitamin A Supplementation Improves Spatial Memory and Alleviates the Age-related Decrease in Hippocampal RXRγ and Kinase Expression in Rats. Front Aging Neurosci 2016; 8:103. [PMID: 27242514 PMCID: PMC4860397 DOI: 10.3389/fnagi.2016.00103] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 04/22/2016] [Indexed: 12/16/2022] Open
Abstract
Studies suggest that eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and vitamin A are critical to delay aged-related cognitive decline. These nutrients regulate gene expression in the brain by binding to nuclear receptors such as the retinoid X receptors (RXRs) and the retinoic acid receptors (RARs). Moreover, EPA/DHA and retinoids activate notably kinase signaling pathways such as AKT or MAPK, which includes ERK1/2. This suggests that these nutrients may modulate brain function in a similar way. Therefore, we investigated in middle-aged rats the behavioral and molecular effects of supplementations with EPA/DHA and vitamin A alone or combined. 18-month-old rats exhibited reference and working memory deficits in the Morris water maze, associated with a decrease in serum vitamin A and hippocampal EPA/DHA contents. RARα, RXRβ, and RXRγ mRNA expression and CAMKII, AKT, ERK1/2 expression were decreased in the hippocampus of middle-aged rats. A combined EPA/DHA and vitamin A supplementation had a beneficial additive effect on reference memory but not in working memory in middle-aged rats, associated with an alleviation of the age-related decrease in RXRγ, CAMKII, AKT, and ERK1 expression in the hippocampus. This study provides a new combined nutritional strategy to delay brain aging.
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Affiliation(s)
- Anne Létondor
- Université de Bordeaux, Nutrition et Neurobiologie Intégrée, UMR 1286Bordeaux, France; INRA, Nutrition et Neurobiologie Intégrée, UMR 1286Bordeaux, France; Bordeaux INP, Nutrition et Neurobiologie Intégrée, UMR 1286Bordeaux, France; ITERG, Institut des Corps GrasPessac, France
| | | | | | - Emmanuel Richard
- INSERM, Biothérapie des Maladies Génétiques Inflammatoires et Cancers, U1035 Bordeaux, France
| | - Sophie Layé
- Université de Bordeaux, Nutrition et Neurobiologie Intégrée, UMR 1286Bordeaux, France; INRA, Nutrition et Neurobiologie Intégrée, UMR 1286Bordeaux, France
| | - Véronique Pallet
- Université de Bordeaux, Nutrition et Neurobiologie Intégrée, UMR 1286Bordeaux, France; INRA, Nutrition et Neurobiologie Intégrée, UMR 1286Bordeaux, France; Bordeaux INP, Nutrition et Neurobiologie Intégrée, UMR 1286Bordeaux, France
| | - Serge Alfos
- Université de Bordeaux, Nutrition et Neurobiologie Intégrée, UMR 1286Bordeaux, France; INRA, Nutrition et Neurobiologie Intégrée, UMR 1286Bordeaux, France; Bordeaux INP, Nutrition et Neurobiologie Intégrée, UMR 1286Bordeaux, France
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28
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The Vitamin A Derivative All-Trans Retinoic Acid Repairs Amyloid-β-Induced Double-Strand Breaks in Neural Cells and in the Murine Neocortex. Neural Plast 2016; 2016:3707406. [PMID: 26881107 PMCID: PMC4735929 DOI: 10.1155/2016/3707406] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 10/13/2015] [Indexed: 12/17/2022] Open
Abstract
The amyloid-β peptide or Aβ is the key player in the amyloid-cascade hypothesis of Alzheimer's disease. Aβ appears to trigger cell death but also production of double-strand breaks (DSBs) in aging and Alzheimer's disease. All-trans retinoic acid (RA), a derivative of vitamin A, was already known for its neuroprotective effects against the amyloid cascade. It diminishes, for instance, the production of Aβ peptides and their oligomerisation. In the present work we investigated the possible implication of RA receptor (RAR) in repair of Aβ-induced DSBs. We demonstrated that RA, as well as RAR agonist Am80, but not AGN 193109 antagonist, repair Aβ-induced DSBs in SH-SY5Y cells and an astrocytic cell line as well as in the murine cortical tissue of young and aged mice. The nonhomologous end joining pathway and the Ataxia Telangiectasia Mutated kinase were shown to be involved in RA-mediated DSBs repair in the SH-SY5Y cells. Our data suggest that RA, besides increasing cell viability in the cortex of young and even of aged mice, might also result in targeted DNA repair of genes important for cell or synaptic maintenance. This phenomenon would remain functional up to a point when Aβ increase and RA decrease probably lead to a pathological state.
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29
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Roumes H, Brossaud J, Lemelletier A, Moisan MP, Pallet V, Redonnet A, Corcuff JB. Retinoids and glucocorticoids have opposite effects on actin cytoskeleton rearrangement in hippocampal HT22 cells. Int J Biochem Cell Biol 2015; 71:102-110. [PMID: 26748244 DOI: 10.1016/j.biocel.2015.12.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 12/18/2015] [Accepted: 12/28/2015] [Indexed: 12/12/2022]
Abstract
A chronic excess of glucocorticoids elicits deleterious effects in the hippocampus. Conversely, retinoic acid plays a major role in aging brain plasticity. As synaptic plasticity depends on mechanisms related to cell morphology, we investigated the involvement of retinoic acid and glucocorticoids in the remodelling of the HT22 neurons actin cytoskeleton. Cells exhibited a significantly more elongated shape with retinoic acid and a rounder shape with dexamethasone; retinoic acid reversed the effects of dexamethasone. Actin expression and abundance were unchanged by retinoic acid or dexamethasone but F-actin organization was dramatically modified. Indeed, retinoic acid and dexamethasone increased (70 ± 7% and 176 ± 5%) cortical actin while retinoic acid suppressed the effect of dexamethasone (90 ± 6%). Retinoic acid decreased (-22 ± 9%) and dexamethasone increased (134 ± 16%) actin stress fibres. Retinoic acid also suppressed the effect of dexamethasone (-21 ± 7%). Spectrin is a key protein in the actin network remodelling. Its abundance was decreased by retinoic acid and increased by dexamethasone (-21 ± 11% and 52 ± 10%). However, retinoic acid did not modify the effect of dexamethasone (48 ± 7%). Calpain activity on spectrin was increased by retinoic acid and decreased by dexamethasone (26 ± 14% and -57 ± 5%); retinoic acid mildly but significantly modified the effect of dexamethasone (-44 ± 7%). The calpain inhibitor calpeptin suppressed the effects of retinoic acid and dexamethasone on cell shape and actin stress fibres remodelling but did not modify the effects on cortical actin. Retinoic acid and dexamethasone have a dramatic but mainly opposite effect on actin cytoskeleton remodelling. These effects originate, at least partly, from calpain activity.
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Affiliation(s)
- Hélène Roumes
- INRA, Nutrition et neurobiologie intégrée, UMR 1286, 33076 Bordeaux, France; University Bordeaux, Nutrition et neurobiologie intégrée, UMR 1286, 33076 Bordeaux, France
| | - Julie Brossaud
- University Bordeaux, Nutrition et neurobiologie intégrée, UMR 1286, 33076 Bordeaux, France; Laboratoire d'Hormonologie, Service de médecine nucléaire, CHU Bordeaux, 33604 Pessac, France
| | - Aloïs Lemelletier
- INRA, Nutrition et neurobiologie intégrée, UMR 1286, 33076 Bordeaux, France; University Bordeaux, Nutrition et neurobiologie intégrée, UMR 1286, 33076 Bordeaux, France
| | - Marie-Pierre Moisan
- INRA, Nutrition et neurobiologie intégrée, UMR 1286, 33076 Bordeaux, France; University Bordeaux, Nutrition et neurobiologie intégrée, UMR 1286, 33076 Bordeaux, France
| | - Véronique Pallet
- University Bordeaux, Nutrition et neurobiologie intégrée, UMR 1286, 33076 Bordeaux, France; IPB, Nutrition et neurobiologie intégrée, UMR 1286, 33076 Bordeaux, France
| | - Anabelle Redonnet
- INRA, Nutrition et neurobiologie intégrée, UMR 1286, 33076 Bordeaux, France; University Bordeaux, Nutrition et neurobiologie intégrée, UMR 1286, 33076 Bordeaux, France
| | - Jean-Benoît Corcuff
- University Bordeaux, Nutrition et neurobiologie intégrée, UMR 1286, 33076 Bordeaux, France; Laboratoire d'Hormonologie, Service de médecine nucléaire, CHU Bordeaux, 33604 Pessac, France.
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30
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Cayzac S, Mons N, Ginguay A, Allinquant B, Jeantet Y, Cho YH. Altered hippocampal information coding and network synchrony in APP-PS1 mice. Neurobiol Aging 2015; 36:3200-3213. [PMID: 26391642 DOI: 10.1016/j.neurobiolaging.2015.08.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 08/15/2015] [Accepted: 08/25/2015] [Indexed: 10/23/2022]
Abstract
β-amyloid is hypothesized to harm neural function and cognitive abilities by perturbing synaptic transmission and plasticity in Alzheimer's disease (AD). To assess the impact of this pathology on hippocampal neurons' ability to encode flexibly environmental information across learning, we performed electrophysiological recordings of CA1 hippocampal unit activity in AD transgenic mice as they acquired an action-reward association in a spatially defined environment; the behavioral task enabled the precise timing of discrete and intentional behaviors of the animal. We found that the proportion of behavioral task-sensitive cells in wild-type (WT) mice typically increased, whereas the proportion of place cells decreased with learning. In AD mice, this learning-dependent change of cell-discharge patterns was absent, and cells exhibited similar firings from the beginning to firings attained at the late learning stage in wild-type cells. These inflexible hippocampal representations of task and space throughout learning are accompanied by remarkable alterations of local oscillatory activity in the theta and ultra-fast ripple frequencies as well as learning abilities. The present data offer new insights into the in vivo cellular and network processes by which β-amyloid and other AD mutations may exert its harmful effects to produce cognitive and behavioral impairments in early stage of AD.
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Affiliation(s)
- Sebastien Cayzac
- Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, CNRS UMR 5287 Pessac Cedex, France; University of Bordeaux, Pessac Cedex, France
| | - Nicole Mons
- Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, CNRS UMR 5287 Pessac Cedex, France; University of Bordeaux, Pessac Cedex, France
| | - Antonin Ginguay
- Laboratoire INSERM, UMR 894-Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, Paris, France; Service de Biochimie, Hôpitaux Universitaires Paris-Centre, Hôpital Cochin, AP-HP, Paris, France
| | - Bernadette Allinquant
- Laboratoire INSERM, UMR 894-Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, Paris, France
| | - Yannick Jeantet
- Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, CNRS UMR 5287 Pessac Cedex, France; University of Bordeaux, Pessac Cedex, France
| | - Yoon H Cho
- Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, CNRS UMR 5287 Pessac Cedex, France; University of Bordeaux, Pessac Cedex, France.
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Affiliation(s)
- V. Pallet
- Univ. Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR, Bordeaux, France
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR, Bordeaux, France
- INP, Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR, Bordeaux, France
| | - K. Touyarot
- Univ. Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR, Bordeaux, France
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR, Bordeaux, France
- INP, Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR, Bordeaux, France
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32
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Schnorr CE, Bittencourt LDS, Petiz LL, Gelain DP, Zeidán-Chuliá F, Moreira JCF. Chronic retinyl palmitate supplementation to middle-aged Wistar rats disrupts the brain redox homeostasis and induces changes in emotional behavior. Mol Nutr Food Res 2015; 59:979-90. [DOI: 10.1002/mnfr.201400637] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 01/29/2015] [Accepted: 01/30/2015] [Indexed: 01/02/2023]
Affiliation(s)
- Carlos Eduardo Schnorr
- Centro de Estudos de Estresse Oxidativo; Departamento de Bioquímica; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Leonardo da Silva Bittencourt
- Centro de Estudos de Estresse Oxidativo; Departamento de Bioquímica; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Lyvia Lintzmaier Petiz
- Centro de Estudos de Estresse Oxidativo; Departamento de Bioquímica; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Daniel Pens Gelain
- Centro de Estudos de Estresse Oxidativo; Departamento de Bioquímica; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Fares Zeidán-Chuliá
- Centro de Estudos de Estresse Oxidativo; Departamento de Bioquímica; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - José Cláudio Fonseca Moreira
- Centro de Estudos de Estresse Oxidativo; Departamento de Bioquímica; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
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Marighetto A, Brayda-Bruno L, Etchamendy N. Studying the impact of aging on memory systems: contribution of two behavioral models in the mouse. Curr Top Behav Neurosci 2015; 10:67-89. [PMID: 21805395 DOI: 10.1007/7854_2011_151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
In the present chapter, we describe our own attempts to improve our understanding of the pathophysiology of memory in aging. First, we tried to improve animal models of memory degradations occurring in aging, and develop common behavioral tools between mice and humans. Second, we began to use these behavioral tools to identify the molecular/intracellular changes occurring within the integrate network of memory systems in order to bridge the gap between the molecular and system level of analysis. The chapter is divided into three parts (i) modeling aging-related degradation in declarative memory (DM) in mice, (ii) assessing the main components of working memory (WM) with a common radial-maze task in mice and humans and (iii) studying the role of the retinoid cellular signaling path in aging-related changes in memory systems.
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Affiliation(s)
- Aline Marighetto
- Neurocentre Magendie-Inserm U862, 146 Rue Leo Saignat, 33077, Bordeaux-Cedex, France,
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Ryan MM, Guévremont D, Luxmanan C, Abraham WC, Williams JM. Aging alters long-term potentiation--related gene networks and impairs synaptic protein synthesis in the rat hippocampus. Neurobiol Aging 2015; 36:1868-80. [PMID: 25716081 DOI: 10.1016/j.neurobiolaging.2015.01.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 01/12/2015] [Accepted: 01/14/2015] [Indexed: 10/24/2022]
Abstract
During aging, memory retention and persistence of long-term potentiation (LTP) are impaired, suggesting an aging-related deterioration in mechanisms regulating information storage. Late-phase LTP requires synthesis of proteins at synapses as well as integrated regulation of gene networks. Because aging diminishes the persistence of LTP, primarily by affecting the transition between early and late phases, we assessed whether this was reflected in perturbation of gene networks. Using DNA microarray analysis, we compared LTP-associated gene expression in young (5 months), middle-aged (15 months), and old (22 months) male Sprague-Dawley rats. As expected, we found no significant difference in LTP measured 20 minutes postinduction; however, we found that overall more genes were regulated in the young group. Bioinformatics predicted not only dysregulation of activator protein-1 and nuclear factor kB transcription factor activity and epigenetic modifications but also dysregulation of protein synthesis. Notably, we confirmed an age-related impairment in metabotropic and ionotropic receptor-mediated synaptic protein synthesis. Together, these results demonstrate that LTP-specific gene expression is altered with aging and suggest that dysregulation of synaptic protein synthesis also contributes to the age-dependent reduction in LTP persistence.
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Affiliation(s)
- Margaret M Ryan
- Department of Anatomy, University of Otago, Dunedin, New Zealand; Brain Health Research Centre, University of Otago, Dunedin, New Zealand
| | - Diane Guévremont
- Department of Anatomy, University of Otago, Dunedin, New Zealand; Brain Health Research Centre, University of Otago, Dunedin, New Zealand
| | - Carthika Luxmanan
- Department of Anatomy, University of Otago, Dunedin, New Zealand; Brain Health Research Centre, University of Otago, Dunedin, New Zealand
| | - Wickliffe C Abraham
- Brain Health Research Centre, University of Otago, Dunedin, New Zealand; Department of Psychology, University of Otago, Dunedin, New Zealand
| | - Joanna M Williams
- Department of Anatomy, University of Otago, Dunedin, New Zealand; Brain Health Research Centre, University of Otago, Dunedin, New Zealand.
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Vitamin A deficiency induces structural and functional alterations in the molecular constituents of the rat hippocampus. Br J Nutr 2014; 113:45-55. [DOI: 10.1017/s0007114514003432] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
To date, no structural study has been carried out on the effects of vitamin A deficiency (VAD) on hippocampal macromolecules. Therefore, in the present study, the effect of dietary VAD on the structure, content and function of rat hippocampal molecules was investigated using Fourier transform IF spectroscopy. Male Wistar rats were randomly divided into three groups: an experimental group maintained on a vitamin A-deficient liquid diet (VAD,n7); a control group maintained on a vitamin A-supplemented liquid diet (CON,n9); a pure control group maintained on standard solid laboratory chow (PC,n7). The PC group was included in the study to ensure that the usage of liquid diet did not influence the outcomes of VAD. Both the CON and PC groups were successfully discriminated from the VAD group by principal component analysis and hierarchical cluster analysis. The spectral analysis indicated a significant decrease in the contents of saturated and unsaturated lipids, cholesteryl esters, TAG and nucleic acids in the VAD group when compared with the CON group (P≤ 0·05). In addition, a significant decrease in membrane fluidity and a significant increase in lipid order (e.g. acyl chain flexibility) were observed in the VAD group (P≤ 0·001). The results of the artificial neural network analysis revealed a significant decrease in the α-helix structure content and a significant increase in the turn and random coil structure contents, indicating protein denaturation, in the VAD group when compared with the CON and PC groups (P≤ 0·05). Dietary exclusion of vitamin A for 3 months apparently had an adverse impact on compositional, structural and dynamical parameters. These changes can be due to increased oxidative stress, confirming the antioxidant protection provided by vitamin A when used as a dietary supplement at low-to-moderate doses.
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Roeske TC, Scharff C, Olson CR, Nshdejan A, Mello CV. Long-distance retinoid signaling in the zebra finch brain. PLoS One 2014; 9:e111722. [PMID: 25393898 PMCID: PMC4230966 DOI: 10.1371/journal.pone.0111722] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 10/02/2014] [Indexed: 11/19/2022] Open
Abstract
All-trans retinoic acid (ATRA), the main active metabolite of vitamin A, is a powerful signaling molecule that regulates large-scale morphogenetic processes during vertebrate embryonic development, but is also involved post-natally in regulating neural plasticity and cognition. In songbirds, it plays an important role in the maturation of learned song. The distribution of the ATRA-synthesizing enzyme, zRalDH, and of ATRA receptors (RARs) have been described, but information on the distribution of other components of the retinoid signaling pathway is still lacking. To address this gap, we have determined the expression patterns of two obligatory RAR co-receptors, the retinoid X receptors (RXR) α and γ, and of the three ATRA-degrading cytochromes CYP26A1, CYP26B1, and CYP26C1. We have also studied the distribution of zRalDH protein using immunohistochemistry, and generated a refined map of ATRA localization, using a modified reporter cell assay to examine entire brain sections. Our results show that (1) ATRA is more broadly distributed in the brain than previously predicted by the spatially restricted distribution of zRalDH transcripts. This could be due to long-range transport of zRalDH enzyme between different nuclei of the song system: Experimental lesions of putative zRalDH peptide source regions diminish ATRA-induced transcription in target regions. (2) Four telencephalic song nuclei express different and specific subsets of retinoid-related receptors and could be targets of retinoid regulation; in the case of the lateral magnocellular nucleus of the anterior nidopallium (lMAN), receptor expression is dynamically regulated in a circadian and age-dependent manner. (3) High-order auditory areas exhibit a complex distribution of transcripts representing ATRA synthesizing and degrading enzymes and could also be a target of retinoid signaling. Together, our survey across multiple connected song nuclei and auditory brain regions underscores the prominent role of retinoid signaling in modulating the circuitry that underlies the acquisition and production of learned vocalizations.
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Affiliation(s)
- Tina C. Roeske
- Department of Psychology, Hunter College, City University of New York, New York, New York, United States of America
| | - Constance Scharff
- Department of Animal Behavior, Freie Universität Berlin, Berlin, Germany
| | - Christopher R. Olson
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, Oregon, United States of America
| | - Arpik Nshdejan
- Department of Animal Behavior, Freie Universität Berlin, Berlin, Germany
| | - Claudio V. Mello
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, Oregon, United States of America
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Abstract
HYPOTHESIS Different pharmacotherapies for sensorineural hearing loss (SNHL) are interconnected in metabolic networks with molecular hubs. BACKGROUND Sensorineural hearing loss is the most common sensory deficit worldwide. Dozens of drugs have shown efficacy against SNHL in animal studies and a few in human studies. Analyzing metabolic networks that interconnect these drugs will point to and prioritize development of new pharmacotherapies for human SNHL. METHODS Drugs that have shown efficacy in treating mammalian SNHL were identified through PubMed literature searches. The drugs were analyzed using the metabolomic analysis and the "grow-tool function" in ingenuity pathway analysis (IPA). The top 3 most interconnected molecules and drugs (i.e., the hubs) within the generated networks were considered important targets for the treatment of SNHL. RESULTS A total of 70 drugs were investigated with IPA. The metabolomic analysis revealed 2 statistically significant networks (Networks 1 and 2). A network analysis using the "grow-tool function" generated one statistically significant network (Network 3). Hubs of these networks were as follows: P38 mitogen-activated protein kinases (P38 MAPK), p42/p44 MAP kinase (ERK1/2) and glutathione for Network 1; protein kinase B (Akt), nuclear factor kappa B (NFkB) and ERK for Network 2; and dexamethasone, tretinoin, and cyclosporin A for Network 3. CONCLUSION Metabolomic and network analysis of the existing pharmacotherapies for SNHL has pointed to and prioritized a number of potential novel targets for treatment of SNHL.
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Masser DR, Bixler GV, Brucklacher RM, Yan H, Giles CB, Wren JD, Sonntag WE, Freeman WM. Hippocampal subregions exhibit both distinct and shared transcriptomic responses to aging and nonneurodegenerative cognitive decline. J Gerontol A Biol Sci Med Sci 2014; 69:1311-24. [PMID: 24994846 DOI: 10.1093/gerona/glu091] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Impairment of hippocampal-dependent spatial learning and memory with aging affects a large segment of the aged population. Hippocampal subregions (CA1, CA3, and DG) have been previously reported to express both common and specific morphological, functional, and gene/protein alterations with aging and cognitive decline. To comprehensively assess gene expression with aging and cognitive decline, transcriptomic analysis of CA1, CA3, and DG was conducted using Adult (12M) and Aged (26M) F344xBN rats behaviorally characterized by Morris water maze performance. Each subregion demonstrated a specific pattern of responses with aging and with cognitive performance. The CA1 and CA3 demonstrating the greatest degree of shared gene expression changes. Analysis of the pathways, processes, and regulators of these transcriptomic changes also exhibit a similar pattern of commonalities and differences across subregions. Gene expression changes between Aged cognitively Intact and Aged cognitively Impaired rats often showed an inversion of the changes between Adult and Aged rats. This failure to adapt rather than an exacerbation of the aging phenotype questions a conventional view that cognitive decline is exaggerated aging. These results are a resource for investigators studying cognitive decline and also demonstrate the need to individually examine hippocampal subregions in molecular analyses of aging and cognitive decline.
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Affiliation(s)
- Dustin R Masser
- Department of Physiology and Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center
| | - Georgina V Bixler
- Genome Sciences Facility, Penn State College of Medicine, Hershey, Pennsylvania
| | | | - Han Yan
- Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center
| | - Cory B Giles
- Arthritis & Clinical Immunology Program, Oklahoma Medicine Research Foundation
| | - Jonathan D Wren
- Arthritis & Clinical Immunology Program, Oklahoma Medicine Research Foundation
| | - William E Sonntag
- Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center
| | - Willard M Freeman
- Department of Physiology and Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center.
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Shi CG, Yang YS, Li H, Zhang Y, Wang N, Wang SM, Wang JD, Zhang SC. Tanshinol protects hippocampus and attenuates vascular dementia development. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2014; 16:667-676. [PMID: 24957473 DOI: 10.1080/10286020.2014.930131] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Accepted: 05/28/2014] [Indexed: 06/03/2023]
Abstract
Tanshinol (3-(3',4'-dihydroxyphenyl)-(2R)-lactic acid, TSL) is widely used in traditional Chinese medicine for the treatment of cardiovascular and cerebrovascular diseases. Here, we assessed whether TSL protected hippocampus and attenuated vascular dementia (VD) development in rats. The behavioral analysis showed that TSL could decrease the distance and latency time, and increase the swim speed in water maze in rats subjected to VD. TSL remarkably increased acetylcholine level and decreased acetylcholinesterase activity in rats subjected to VD. Likewise, TSL remarkably decreased malondialdehyde and increased superoxide dismutase levels in rats subjected to VD. Furthermore, treatment with TSL reduced the level of dead neurons in dentate gyrus. In addition, TSL upregulated growth-associated protein 43 (GAP43) and vascular endothelial growth factor (VEGF) expression and downregulated phosphorylated Akt (p-AKt) and phosphorylated glycogen synthase kinase (p-GSK3β) expression in hippocampus in rats subjected to VD. These results suggest that TSL may be a potential compound in VD model.
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Affiliation(s)
- Cui-Ge Shi
- a Department of Cell Biology , National Research Institute of Family Planning , Beijing 100081 , China
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Abstract
Vitamin A is an essential nutrient with important roles in immunological responses and in brain development. Its main metabolite is retinoic acid (RA), which is responsible for the neuroimmunological functions related to vitamin A. In the brain, RA is known to have interactions with other nuclear receptor-mediated signalling pathways. RA is involved in plasticity, regeneration, cognition and behaviour. In the peripheral blood, RA plays a major role both in increasing tolerance and in decreasing inflammation, through balancing T-lymphocyte populations. It is likely that RA synthesis may be manipulated by complex cross-talk among cells during infection and inflammation. The role of vitamin A in multiple sclerosis (MS) could be dual: at the same time as it decreases inflammation and increases tolerance of autoimmunity, it may also help in brain protection. The present review discusses the beneficial effects that vitamin A might have for controlling MS, although it must be clearly stated that, at the present time, there is no clear indication for using vitamin A as a treatment for MS. However, the results from the present review should encourage clinical trials with vitamin supplementation as a potential treatment or as an add-on option. Vitamin A acts in synergy with vitamin D, and the immunological homeostasis ensured by these vitamins should not be unbalanced in favour of only one of them.
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Bonhomme D, Pallet V, Dominguez G, Servant L, Henkous N, Lafenêtre P, Higueret P, Béracochéa D, Touyarot K. Retinoic acid modulates intrahippocampal levels of corticosterone in middle-aged mice: consequences on hippocampal plasticity and contextual memory. Front Aging Neurosci 2014; 6:6. [PMID: 24570662 PMCID: PMC3917121 DOI: 10.3389/fnagi.2014.00006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Accepted: 01/10/2014] [Indexed: 12/13/2022] Open
Abstract
It is now established that vitamin A and its derivatives, retinoic acid (RA), are required for cognitive functions in adulthood. RA hyposignaling and hyperactivity of glucocorticoid (GC) pathway appear concomitantly during aging and would contribute to the deterioration of hippocampal synaptic plasticity and functions. Furthermore, recent data have evidenced counteracting effects of retinoids on GC signaling pathway. In the present study, we addressed the following issue: whether the stimulation of RA pathway could modulate intrahippocampal corticosterone (CORT) levels in middle-aged mice and thereby impact on hippocampal plasticity and cognitive functions. We firstly investigated the effects of vitamin A supplementation and RA treatment in middle-aged mice, on contextual serial discrimination task, a paradigm which allows the detection of early signs of age-related hippocampal-dependent memory dysfunction. We then measured intrahippocampal CORT concentrations by microdialysis before and after a novelty-induced stress. Our results show that both RA treatment and vitamin A supplementation improve “episodic-like” memory in middle-aged mice but RA treatment appears to be more efficient. Moreover, we show that the beneficial effect of RA on memory is associated to an increase in hippocampal PSD-95 expression. In addition, intrahippocampal CORT levels are reduced after novelty-induced stress in RA-treated animals. This effect cannot be related to a modulation of hippocampal 11β-HSD1 expression. Interestingly, RA treatment induces a modulation of RA receptors RARα and RARβ expression in middle-aged mice, a finding which has been correlated with the amplitude of intrahippocampal CORT levels after novelty-induced stress. Taken together, our results suggest that the preventive action of RA treatment on age-related memory deficits in middle-aged mice could be, at least in part, due to an inhibitory effect of retinoids on GC activity.
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Affiliation(s)
- Damien Bonhomme
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; Université de Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
| | - Véronique Pallet
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; Université de Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
| | - Gaelle Dominguez
- CNRS, Intititut de Neurosciences Cognitives et Intégratives d'Aquitaine, UMR 5287 Talence, France ; INSERM, U-930, Université François Rabelais Tours, France
| | - Laure Servant
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; Université de Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
| | - Nadia Henkous
- CNRS, Intititut de Neurosciences Cognitives et Intégratives d'Aquitaine, UMR 5287 Talence, France
| | - Pauline Lafenêtre
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; Université de Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
| | - Paul Higueret
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; Université de Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
| | - Daniel Béracochéa
- CNRS, Intititut de Neurosciences Cognitives et Intégratives d'Aquitaine, UMR 5287 Talence, France
| | - Katia Touyarot
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; Université de Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
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Bonhomme D, Minni AM, Alfos S, Roux P, Richard E, Higueret P, Moisan MP, Pallet V, Touyarot K. Vitamin A status regulates glucocorticoid availability in Wistar rats: consequences on cognitive functions and hippocampal neurogenesis? Front Behav Neurosci 2014; 8:20. [PMID: 24550796 PMCID: PMC3912436 DOI: 10.3389/fnbeh.2014.00020] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Accepted: 01/13/2014] [Indexed: 12/21/2022] Open
Abstract
A disruption of the vitamin A signaling pathway has been involved in age-related memory decline and hippocampal plasticity alterations. Using vitamin A deficiency (VAD), a nutritional model leading to a hyposignaling of the retinoid pathway, we have recently demonstrated that retinoic acid (RA), the active metabolite of vitamin A, is efficient to reverse VAD-induced spatial memory deficits and adult hippocampal neurogenesis alterations. Besides, excess of glucocorticoids (GCs) occurring with aging is known to strongly inhibit hippocampal plasticity and functions and few studies report on the counteracting effects of RA signaling pathway on GCs action. Here, we have addressed whether the modulation of brain GCs availability could be one of the biological mechanisms involved in the effects of vitamin A status on hippocampal plasticity and functions. Thus, we have studied the effects of a vitamin A-free diet for 14 weeks and a 4-week vitamin A supplementation on plasma and hippocampal corticosterone (CORT) levels in Wistar rats. We have also investigated corticosteroid binding globulin (CBG) binding capacity and 11beta-Hydrosteroid Dehydrogenase type 1 (11β-HSD1) activity, both important modulators of CORT availability at the peripheral and hippocampal levels respectively. Interestingly, we show that the vitamin A status regulates levels of free plasma CORT and hippocampal CORT levels, by acting through a regulation of CBG binding capacity and 11β-HSD1 activity. Moreover, our results suggest that increased CORT levels in VAD rats could have some deleterious consequences on spatial memory, anxiety-like behavior and adult hippocampal neurogenesis whereas these effects could be corrected by a vitamin A supplementation. Thus, the modulation of GCs availability by vitamin A status is an important biological mechanism that should be taken into account in order to prevent age-related cognitive decline and hippocampal plasticity alterations.
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Affiliation(s)
- Damien Bonhomme
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; University of Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
| | - Amandine M Minni
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; University of Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
| | - Serge Alfos
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; University of Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
| | - Pascale Roux
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; University of Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
| | - Emmanuel Richard
- INSERM, Biothérapie des Maladies Génétiques et Cancer, U1035 Bordeaux, France
| | - Paul Higueret
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; University of Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
| | - Marie-Pierre Moisan
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; University of Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
| | - Véronique Pallet
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; University of Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
| | - Katia Touyarot
- INRA, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France ; University of Bordeaux, Nutrition et Neurobiologie Intégrée (NutriNeuro), UMR 1286 Bordeaux, France
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Marissal-Arvy N, Hamiani R, Richard E, Moisan MP, Pallet V. Vitamin A regulates hypothalamic-pituitary-adrenal axis status in LOU/C rats. J Endocrinol 2013; 219:21-7. [PMID: 23847298 DOI: 10.1530/joe-13-0062] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The aim of this study was to explore the involvement of retinoids in the hypoactivity and hyporeactivity to stress of the hypothalamic-pituitary-adrenal (HPA) axis in LOU/C rats. We measured the effects of vitamin A deficiency administered or not with retinoic acid (RA) on plasma corticosterone in standard conditions and in response to restraint stress and on hypothalamic and hippocampal expression of corticosteroid receptors, corticotropin-releasing hormone and 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) in LOU/C rats. Interestingly, under control conditions, we measured a higher plasma concentration of retinol in LOU/C than in Wistar rats, which could contribute to the lower basal activity of the HPA axis in LOU/C rats. Vitamin A deficiency induced an increased HPA axis activity in LOU/C rats, normalized by RA administration. Compared with LOU/C control rats, vitamin A-deficient rats showed a delayed and heightened corticosterone response to restraint stress. The expression of corticosteroid receptors was strongly decreased by vitamin A deficiency in the hippocampus, which could contribute to a less efficient feedback by corticosterone on HPA axis tone. The expression of 11β-HSD1 was increased by vitamin A deficiency in the hypothalamus (+62.5%) as in the hippocampus (+104.7%), which could lead to a higher production of corticosterone locally and contribute to alteration of the hippocampus. RA supplementation treatment restored corticosterone concentrations and 11β-HSD1 expression to control levels. The high vitamin A status of LOU/C rats could contribute to their low HPA axis activity/reactivity and to a protective effect against 11β-HSD1-mediated deleterious action on cognitive performances during ageing.
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Affiliation(s)
- Nathalie Marissal-Arvy
- INRA, Nutrition and Integrative Neurobiology, UMR1286, Université de Bordeaux 2, 146, rue Léo Saignat, 33076 Bordeaux Cedex, France
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A mid-life vitamin A supplementation prevents age-related spatial memory deficits and hippocampal neurogenesis alterations through CRABP-I. PLoS One 2013; 8:e72101. [PMID: 23977218 PMCID: PMC3747058 DOI: 10.1371/journal.pone.0072101] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Accepted: 07/04/2013] [Indexed: 12/28/2022] Open
Abstract
Age-related memory decline including spatial reference memory is considered to begin at middle-age and coincides with reduced adult hippocampal neurogenesis. Moreover, a dysfunction of vitamin A hippocampal signalling pathway has been involved in the appearance of age-related memory deficits but also in adult hippocampal neurogenesis alterations. The present study aims at testing the hypothesis that a mid-life vitamin A supplementation would be a successful strategy to prevent age-related memory deficits. Thus, middle-aged Wistar rats were submitted to a vitamin A enriched diet and were tested 4 months later in a spatial memory task. In order to better understand the potential mechanisms mediating the effects of vitamin A supplementation on hippocampal functions, we studied different aspects of hippocampal adult neurogenesis and evaluated hippocampal CRABP-I expression, known to modulate differentiation processes. Here, we show that vitamin A supplementation from middle-age enhances spatial memory and improves the dendritic arborisation of newborn immature neurons probably resulting in a better survival and neuronal differentiation in aged rats. Moreover, our results suggest that hippocampal CRABP-I expression which controls the intracellular availability of retinoic acid (RA), may be an important regulator of neuronal differentiation processes in the aged hippocampus. Thus, vitamin A supplementation from middle-age could be a good strategy to maintain hippocampal plasticity and functions.
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van Wijngaarden P, Franklin RJM. Ageing stem and progenitor cells: implications for rejuvenation of the central nervous system. Development 2013; 140:2562-75. [PMID: 23715549 DOI: 10.1242/dev.092262] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The growing burden of the rapidly ageing global population has reinvigorated interest in the science of ageing and rejuvenation. Among organ systems, rejuvenation of the central nervous system (CNS) is arguably the most complex and challenging of tasks owing, among other things, to its startling structural and functional complexity and its restricted capacity for repair. Thus, the prospect of meaningful rejuvenation of the CNS has seemed an impossible goal; however, advances in stem cell science are beginning to challenge this assumption. This Review outlines these advances with a focus on ageing and rejuvenation of key endogenous stem and progenitor cell compartments in the CNS. Insights gleaned from studies of model organisms, chiefly rodents, will be considered in parallel with human studies.
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Affiliation(s)
- Peter van Wijngaarden
- Wellcome Trust-MRC Cambridge Stem Cell Institute and Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES, UK.
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Brossaud J, Roumes H, Moisan MP, Pallet V, Redonnet A, Corcuff JB. Retinoids and glucocorticoids target common genes in hippocampal HT22 cells. J Neurochem 2013; 125:518-31. [PMID: 23398290 DOI: 10.1111/jnc.12192] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Revised: 01/11/2013] [Accepted: 01/14/2013] [Indexed: 11/29/2022]
Abstract
Vitamin A metabolite retinoic acid (RA) plays a major role in the aging adult brain plasticity. Conversely, chronic excess of glucocorticoids (GC) elicits some deleterious effects in the hippocampus. We questioned here the involvement of RA and GC in the expression of target proteins in hippocampal neurons. We investigated proteins involved either in the signaling pathways [RA receptor β (RARβ) and glucocorticoid receptor (GR)] or in neuron differentiation and plasticity [tissue transglutaminase 2 (tTG) and brain-derived neurotrophic factor (BDNF)] in a hippocampal cell line, HT22. We applied RA and/or dexamethasone (Dex) as activators of the pathways and investigated mRNA and protein expression of their receptors and of tTG and BDNF as well as tTG activity and BDNF secretion. Our results confirm the involvement of RA- and GC-dependent pathways and their interaction in our neuronal cell model. First, both pathways regulate the transcription and expression of own and reciprocal receptors: RA and Dex increased RARβ and decreased GR expressions. Second, Dex reduces the expression of tTG when associated with RA despite stimulating its expression when used alone. Importantly, when they are combined, RA counteracts the deleterious effect of glucocorticoids on BDNF regulation and thus may improve neuronal plasticity under stress conditions. In conclusion, GC and RA both interact through regulations of the two receptors, RARβ and GR. Furthermore, they both act, synergistically or oppositely, on other target proteins critical for neuronal plasticity, tTG and BDNF.
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Affiliation(s)
- Julie Brossaud
- INRA, Nutrition et Neurobiologie Intégrée, UMR1286, Bordeaux, France
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Nakagomi M, Shudo K, Nakatani-Pawlak A. Synthetic retinoid Am80 results in improved exploratory and emotional behavior in the P8 substrain of senescence-accelerated mice. Pharmacol Biochem Behav 2013; 104:1-9. [DOI: 10.1016/j.pbb.2013.01.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 01/07/2013] [Accepted: 01/10/2013] [Indexed: 01/06/2023]
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Brayda-Bruno L, Mons N, Yee BK, Micheau J, Abrous DN, Nogues X, Marighetto A. Partial loss in septo-hippocampal cholinergic neurons alters memory-dependent measures of brain connectivity without overt memory deficits. Neurobiol Dis 2013; 54:372-81. [PMID: 23376311 DOI: 10.1016/j.nbd.2013.01.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 01/07/2013] [Accepted: 01/10/2013] [Indexed: 11/18/2022] Open
Abstract
The functional relevance of septo-hippocampal cholinergic (SHC) degeneration to the degradation of hippocampus-dependent declarative memory (DM) in aging and Alzheimer's disease (AD) remains ill-defined. Specifically, selective SHC lesions often fail to induce overt memory impairments in animal models. In spite of apparent normal performance, however, neuronal activity within relevant brain structures might be altered by SHC disruption. We hypothesized that partial SHC degeneration may contribute to functional alterations within memory circuits occurring in aging before DM decline. In young adult mice, we studied the effects of behaviorally ineffective (saporin-induced) SHC lesions - similar in extent to that seen in aged animals - on activity patterns and functional connectivity between three main neural memory systems: the septo-hippocampal system, the striatum and the amygdala that sustain declarative, procedural and emotional memory, respectively. Animals were trained in a radial maze procedure dissociating the human equivalents of relational/DM and non-R/DM expressions in animals. Test-induced Fos activation pattern revealed that the partial SHC lesion significantly altered the brain's functional activities and connectivity (co-activation pattern) despite the absence of overt behavioral deficit. Specifically, hippocampal CA3 hyperactivity and abnormal septo-hippocampo-amygdalar inter-connectivity resemble those observed in aging and prodromal AD. Hence, SHC neurons critically coordinate hippocampal function in concert with extra-hippocampal structures in accordance with specific mnemonic demand. Although partial SHC degeneration is not sufficient to impact DM performance by itself, the connectivity change might predispose the emergence of subsequent DM loss when, due to additional age-related insults, the brain can no longer compensate the holistic imbalance caused by cholinergic loss.
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Affiliation(s)
- Laurent Brayda-Bruno
- INSERM, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U862, F-33000 Bordeaux, France
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Fragoso YD, Campos NS, Tenrreiro BF, Guillen FJ. Systematic review of the literature on vitamin A and memory. Dement Neuropsychol 2012; 6:219-222. [PMID: 29213801 PMCID: PMC5619333 DOI: 10.1590/s1980-57642012dn06040005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background Over the last 30 years, a variety of studies reporting the effects of vitamin
A on memory have been published. Objective To perform a rigorous systematic review of the literature on vitamin A and
memory in order to organize evidence-based data on the subject. Methods Four authors carried out the systematic review in accordance with strict
guidelines. The terms "vitamin A" OR "retinol" OR "retinoic acid" AND
"memory" OR "cognition" OR "Alzheimer" were searched in virtually all
medical research databases. Results From 236 studies containing the key words, 44 were selected for this review,
numbering 10 reviews and 34 original articles. Most studies used animal
models for studying vitamin A and cognition. Birds, mice and rats were more
frequently employed whereas human studies accounted for only two reports on
brain tissue from autopsies and one on the role of isotretinoin in cognition
among individuals taking this medication to treat acne. Conclusion Vitamin A may be an important and viable complement in the treatment and
prevention of Alzheimer's disease. Clinical trials are imperative and, at
present, there is no evidence-based data to recommend vitamin A
supplementation for the prevention or treatment of Alzheimer's disease.
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Affiliation(s)
- Yara Dadalti Fragoso
- Head of the Department of Neurology, Universidade Metropolitana de Santos, SP, Brazil
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Short-term long chain omega3 diet protects from neuroinflammatory processes and memory impairment in aged mice. PLoS One 2012; 7:e36861. [PMID: 22662127 PMCID: PMC3360741 DOI: 10.1371/journal.pone.0036861] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Accepted: 04/10/2012] [Indexed: 12/20/2022] Open
Abstract
Regular consumption of food enriched in omega3 polyunsaturated fatty acids (ω3 PUFAs) has been shown to reduce risk of cognitive decline in elderly, and possibly development of Alzheimer's disease. Docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) are the most likely active components of ω3-rich PUFAs diets in the brain. We therefore hypothesized that exposing mice to a DHA and EPA enriched diet may reduce neuroinflammation and protect against memory impairment in aged mice. For this purpose, mice were exposed to a control diet throughout life and were further submitted to a diet enriched in EPA and DHA during 2 additional months. Cytokine expression together with a thorough analysis of astrocytes morphology assessed by a 3D reconstruction was measured in the hippocampus of young (3-month-old) and aged (22-month-old) mice. In addition, the effects of EPA and DHA on spatial memory and associated Fos activation in the hippocampus were assessed. We showed that a 2-month EPA/DHA treatment increased these long-chain ω3 PUFAs in the brain, prevented cytokines expression and astrocytes morphology changes in the hippocampus and restored spatial memory deficits and Fos-associated activation in the hippocampus of aged mice. Collectively, these data indicated that diet-induced accumulation of EPA and DHA in the brain protects against neuroinflammation and cognitive impairment linked to aging, further reinforcing the idea that increased EPA and DHA intake may provide protection to the brain of aged subjects.
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