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Preethy H A, Rajendran K, Sukumar AJ, Krishnan UM. Emerging paradigms in Alzheimer's therapy. Eur J Pharmacol 2024; 981:176872. [PMID: 39117266 DOI: 10.1016/j.ejphar.2024.176872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 07/13/2024] [Accepted: 08/05/2024] [Indexed: 08/10/2024]
Abstract
Alzheimer's disease is a neurodegenerative disorder that affects elderly, and its incidence is continuously increasing across the globe. Unfortunately, despite decades of research, a complete cure for Alzheimer's disease continues to elude us. The current medications are mainly symptomatic and slow the disease progression but do not result in reversal of all disease pathologies. The growing body of knowledge on the factors responsible for the onset and progression of the disease has resulted in the identification of new targets that could be targeted for treatment of Alzheimer's disease. This has opened new vistas for treatment of Alzheimer's disease that have moved away from chemotherapeutic agents modulating a single target to biologics and combinations that acted on multiple targets thereby offering better therapeutic outcomes. This review discusses the emerging directions in therapeutic interventions against Alzheimer's disease highlighting their merits that promise to change the treatment paradigm and challenges that limit their clinical translation.
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Affiliation(s)
- Agnes Preethy H
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, India; Centre for Nanotechnology & Advanced Biomaterials, SASTRA Deemed University, Thanjavur, India
| | - Kayalvizhi Rajendran
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, India; Centre for Nanotechnology & Advanced Biomaterials, SASTRA Deemed University, Thanjavur, India
| | - Anitha Josephine Sukumar
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, India; Centre for Nanotechnology & Advanced Biomaterials, SASTRA Deemed University, Thanjavur, India
| | - Uma Maheswari Krishnan
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, India; Centre for Nanotechnology & Advanced Biomaterials, SASTRA Deemed University, Thanjavur, India; School of Arts, Sciences, Humanities & Education, SASTRA Deemed University, Thanjavur, India.
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Liang Z, Wang Z, Liu X, He Y. Confronting the global obesity epidemic: investigating the role and underlying mechanisms of vitamin D in metabolic syndrome management. Front Nutr 2024; 11:1416344. [PMID: 39183985 PMCID: PMC11342275 DOI: 10.3389/fnut.2024.1416344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Accepted: 07/22/2024] [Indexed: 08/27/2024] Open
Abstract
The escalating prevalence of MetS, driven by global obesity trends, underscores the urgent need for innovative therapeutic strategies. To gain a deeper understanding of the therapeutic potential of vitamin D in addressing MetS, we embarked on a targeted literature review that thoroughly examines the scientific underpinnings and pivotal discoveries derived from pertinent studies, aiming to unravel the intricate mechanisms through which vitamin D exerts its effects on MetS and its components. This article explores the multifunctional role of vitamin D in the management of MetS, focusing on its regulatory effects on insulin sensitivity, lipid metabolism, inflammation, and immune response. Through an extensive review of current research, we unveil the complex mechanisms by which vitamin D influences MetS components, highlighting its potential as a therapeutic agent. Our analysis reveals that vitamin D's efficacy extends beyond bone health to include significant impacts on cellular and molecular pathways critical to MetS. We advocate for further research to optimize vitamin D supplementation as a component of precision medicine for MetS, considering the safety concerns related to dosage and long-term use.
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Affiliation(s)
- Zihui Liang
- Department of Rehabilitation, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
- Department of Physical Medicine and Rehabilitation, The Second Clinical College, China Medical University, Shenyang, Liaoning, China
| | - Ziliang Wang
- Department of Rehabilitation, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xueyong Liu
- Department of Rehabilitation, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
- Department of Physical Medicine and Rehabilitation, The Second Clinical College, China Medical University, Shenyang, Liaoning, China
| | - Yu He
- Department of Rehabilitation, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
- Department of Physical Medicine and Rehabilitation, The Second Clinical College, China Medical University, Shenyang, Liaoning, China
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Kawczak P, Feszak I, Brzeziński P, Bączek T. Structure-Activity Relationships and Therapeutic Applications of Retinoids in View of Potential Benefits from Drug Repurposing Process. Biomedicines 2024; 12:1059. [PMID: 38791021 PMCID: PMC11117600 DOI: 10.3390/biomedicines12051059] [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: 03/28/2024] [Revised: 05/08/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
Vitamin A, an essential micronutrient, is integral to various biological processes crucial for organismal development and maintenance. Dietary sources of vitamin A encompass preformed retinol, retinyl esters, and provitamin A carotenoids. Retinoic acid (RA), a key component, plays pivotal roles in vision, cell proliferation, apoptosis, immune function, and gene regulation. Drug repurposing, an effective strategy for identifying new therapeutic applications for existing drugs, has gained prominence in recent years. This review seeks to provide a comprehensive overview of the current research landscape surrounding retinoids and drug repurposing. The scope of this review encompasses a comprehensive examination of retinoids and their potential for repurposing in various therapeutic contexts. Despite their efficacy in treating dermatological conditions, concerns about toxicity persist, driving the search for safer and more potent retinoids. The molecular mechanisms underlying retinoid activity involve binding to retinoic acid receptors (RARs) and retinoid X receptors (RXRs), leading to transcriptional regulation of target genes. This review seeks to shed light on the possibilities for repurposing retinoids to cover a wider spectrum of therapeutic uses by exploring recent scientific progress. It also aims to offer a more comprehensive understanding of the therapeutic prospects of retinoids and the broader impact of drug repositioning in contemporary medicine.
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Affiliation(s)
- Piotr Kawczak
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, 80-416 Gdańsk, Poland;
| | - Igor Feszak
- Department of Nursing, Faculty of Health Sciences, Pomeranian University in Słupsk, 76-200 Słupsk, Poland;
| | - Piotr Brzeziński
- Department of Physiotherapy and Medical Emergency, Institute of Health Sciences, Pomeranian University in Słupsk, 76-200 Słupsk, Poland;
- Department of Dermatology, Voivodeship Specialist Hospital, 76-200 Słupsk, Poland
| | - Tomasz Bączek
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, 80-416 Gdańsk, Poland;
- Department of Nursing, Faculty of Health Sciences, Pomeranian University in Słupsk, 76-200 Słupsk, Poland;
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Wang ZL, Pang SJ, Zhang KW, Li PY, Li PG, Yang C. Dietary vitamin A modifies the gut microbiota and intestinal tissue transcriptome, impacting intestinal permeability and the release of inflammatory factors, thereby influencing Aβ pathology. Front Nutr 2024; 11:1367086. [PMID: 38606018 PMCID: PMC11008281 DOI: 10.3389/fnut.2024.1367086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Accepted: 03/07/2024] [Indexed: 04/13/2024] Open
Abstract
Background Alzheimer's disease (AD) is an age-related neurodegenerative disorder with no effective interventions for curing or modifying its progression. However, emerging research suggests that vitamin A in the diet may play a role in both the prevention and treatment of AD, although the exact mechanisms are not fully understood. Objectives This study aims to investigate the dietary vitamin A modifies the gut microbiota and intestinal tissue transcriptome, impacting intestinal permeability and the release of inflammatory factors, thereby influencing Aβ pathology shedding light on its potential as a dietary intervention for AD prevention and treatment. Methods The APP/PS1-AD mouse model was employed and divided into three dietary groups: vitamin A-deficient (VAD), normal vitamin A (VAN), and vitamin A-supplemented (VAS) for a 12-week study. Neurobehavioral functions were assessed using the Morris Water Maze Test (MWM). Enzyme-linked immunosorbent assay (ELISA) was used to quantify levels of Diamine Oxidase (DAO), D-lactate, IL-6, IL-1β, and TNF-a cytokines. Serum vitamin A levels were analyzed via LC-MS/MS analysis. Immunohistochemical analysis and morphometry were performed to evaluate the deposition of Aβ in brain tissue. The gut microbiota of APP/PS1 mice was analyzed using 16S rRNA sequencing analysis. Additionally, transcriptomic analysis was conducted on intestinal tissue from APP/PS1 mice. Results No significant changes in food intake and body weight were observed among the groups. However, the VAD and VAS groups showed reduced food intake compared to the VAN group at various time points. In terms of cognitive function, the VAN group performed better in the Morris Water Maze Test, indicating superior learning and memory abilities. The VAD and VAS groups exhibited impaired performance, with the VAS group performing relatively better than the VAD group. Serum vitamin A concentrations differed significantly among the groups, with the VAS group having the highest concentration. Aβ levels were significantly higher in the VAD group compared to both the VAN and VAS groups. Microbial analysis revealed that the VAS and VAN groups had higher microbial diversity than the VAD group, with specific taxa characterizing each group. The VAN group was characterized by taxa such as Actinohacteriota and Desulfovibrionaceae, while the VAD group was characterized by Parabacteroides and Tannerellaceae. The VAS group showed similarities with both VAN and VAD groups, with taxa like Desulfobacterota and Desulfovibrionaceae being present. The VAD vs. VAS, VAD vs. VAN, and VAS vs. VAN comparisons identified 571, 313, and 243 differentially expressed genes, respectively, which associated with cellular and metabolic processes, and pathway analysis revealed enrichment in pathways related to chemical carcinogenesis, drug metabolism, glutathione metabolism, and immune-related processes. The VAD group exhibited higher levels of D-lactate, diamine oxidase, and inflammatory cytokines (TNF-a, IL-1β, IL-6) compared to the VAN and VAS groups. Conclusion Dietary vitamin A supplementation modulates the gut microbiota, intestinal permeability, inflammatory factors, and Aβ protein formation, offering insights into the pathogenesis of AD and potential therapeutic avenues for further exploration. This research highlights the intricate interplay between diet, gut microbiota, and neurodegenerative processes, emphasizing the importance of dietary interventions in managing AD-related pathologies.
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Affiliation(s)
- Zhong-Li Wang
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Jiaxing University, The Second Hospital of Jiaxing, Zhejiang, China
| | - Shao-Jie Pang
- Heilongjiang Feihe Dairy Co., Ltd. Feihe Research Institute, Beijing, China
| | - Kai-Wen Zhang
- School of Public Health, Capital Medical University, Beijing, China
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Peng-Yu Li
- School of Public Health, Capital Medical University, Beijing, China
| | - Peng-Gao Li
- School of Public Health, Capital Medical University, Beijing, China
| | - Chun Yang
- School of Public Health, Capital Medical University, Beijing, China
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Sultana OF, Hia RA, Reddy PH. A Combinational Therapy for Preventing and Delaying the Onset of Alzheimer's Disease: A Focus on Probiotic and Vitamin Co-Supplementation. Antioxidants (Basel) 2024; 13:202. [PMID: 38397800 PMCID: PMC10886126 DOI: 10.3390/antiox13020202] [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: 12/30/2023] [Revised: 01/27/2024] [Accepted: 02/02/2024] [Indexed: 02/25/2024] Open
Abstract
Alzheimer's disease is a progressive neurodegenerative disorder with a complex etiology, and effective interventions to prevent or delay its onset remain a global health challenge. In recent years, there has been growing interest in the potential role of probiotic and vitamin supplementation as complementary strategies for Alzheimer's disease prevention. This review paper explores the current scientific literature on the use of probiotics and vitamins, particularly vitamin A, D, E, K, and B-complex vitamins, in the context of Alzheimer's disease prevention and management. We delve into the mechanisms through which probiotics may modulate gut-brain interactions and neuroinflammation while vitamins play crucial roles in neuronal health and cognitive function. The paper also examines the collective impact of this combinational therapy on reducing the risk factors associated with Alzheimer's disease, such as oxidative stress, inflammation, and gut dysbiosis. By providing a comprehensive overview of the existing evidence and potential mechanisms, this review aims to shed light on the promise of probiotic and vitamin co-supplementation as a multifaceted approach to combat Alzheimer's disease, offering insights into possible avenues for future research and clinical application.
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Affiliation(s)
- Omme Fatema Sultana
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA;
| | - Raksa Andalib Hia
- Nutritional Sciences Department, College of Human Sciences, Texas Tech University, Lubbock, TX 79409, USA;
| | - P. Hemachandra Reddy
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA;
- Nutritional Sciences Department, College of Human Sciences, Texas Tech University, Lubbock, TX 79409, USA;
- Public Health Department of Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Department of Speech, Language and Hearing Sciences, School Health Professions, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
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Manna PR, Kshirsagar S, Pradeepkiran JA, Rawat P, Kumar S, Reddy AP, Reddy PH. Protective function of StAR in amyloid-β accumulated hippocampal neurotoxicity and neurosteroidogenesis: Mechanistic insights into Alzheimer's disease. Biochim Biophys Acta Mol Basis Dis 2023; 1869:166738. [PMID: 37142132 DOI: 10.1016/j.bbadis.2023.166738] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 04/25/2023] [Accepted: 04/27/2023] [Indexed: 05/06/2023]
Abstract
The steroidogenic acute regulatory (StAR) protein principally mediates steroid hormone biosynthesis by governing the transport of intramitochondrial cholesterol. Neurosteroids progressively decrease during aging, the key risk factor for Alzheimer's disease (AD), which is triggered by brain-region specific accumulation of amyloid beta (Aβ) precursor protein (APP), a key pathological factor. We demonstrate that hippocampal neuronal cells overexpressing wild-type (WtAPP) and mutant APP (mAPP) plasmids, conditions mimetic to AD, resulted in decreases in StAR mRNA, free cholesterol, and pregnenolone levels. The magnitude of suppression of the steroidogenic response was more pronounced with mAPP than that of WtAPP. While mAPP-waned assorted anomalies correlate to AD pathology, deterioration of APP/Aβ laden StAR expression and neurosteroid biosynthesis was enhanced by retinoid signaling. An abundance of mitochondrially targeted StAR expression partially restored APP/Aβ accumulated diverse neurodegenerative vulnerabilities. Immunofluorescence analyses revealed that overexpression of StAR diminishes mAPP provoked Aβ aggregation. Co-expression of StAR and mAPP in hippocampal neurons substantially reversed the declines in mAPP mediated cell survival, mitochondrial oxygen consumption rate, and ATP production. Concurrently, induction of mAPP induced Aβ loading showed an increase in cholesterol esters, but decrease in free cholesterol, concomitant with pregnenolone biosynthesis, events that were inversely regulated by StAR. Moreover, retinoid signaling was found to augment cholesterol content for facilitating neurosteroid biosynthesis in an AD mimetic condition. These findings provide novel insights into the molecular events by which StAR acts to protect mAPP-induced hippocampal neurotoxicity, mitochondrial dysfunction, and neurosteroidogenesis, and these measures are fundamental for ameliorating and/or delaying dementia in individuals with AD.
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Affiliation(s)
- Pulak R Manna
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.
| | - Sudhir Kshirsagar
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | | | - Priyanka Rawat
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Subodh Kumar
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; Center of Emphasis in Neuroscience, Department of Molecular and Translational Medicine, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX 79905, USA
| | - Arubala P Reddy
- Nutritional Sciences Department, College of Human Sciences, Texas Tech University, 1301 Akron Ave, Lubbock, TX 79409, USA
| | - P Hemachandra Reddy
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; Nutritional Sciences Department, College of Human Sciences, Texas Tech University, 1301 Akron Ave, Lubbock, TX 79409, USA; Neurology, Departments of School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; Public Health Department of Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; Department of Speech, Language and Hearing Sciences, School Health Professions, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.
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Choudhary M, Malek G. Potential therapeutic targets for age-related macular degeneration: The nuclear option. Prog Retin Eye Res 2023; 94:101130. [PMID: 36220751 PMCID: PMC10082136 DOI: 10.1016/j.preteyeres.2022.101130] [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: 05/01/2022] [Revised: 09/18/2022] [Accepted: 09/18/2022] [Indexed: 02/07/2023]
Abstract
The functions and activities of nuclear receptors, the largest family of transcription factors in the human genome, have classically focused on their ability to act as steroid and hormone sensors in endocrine organs. However, they are responsible for a diverse array of physiological functions, including cellular homeostasis and metabolism, during development and aging. Though the eye is not a traditional endocrine organ, recent studies have revealed high expression levels of nuclear receptors in cells throughout the posterior pole. These findings have precipitated an interest in investigating the role of these transcription factors in the eye as a function of age and ocular disease, in particular age-related macular degeneration (AMD). As the leading cause of vision impairment in the elderly, identifying signaling pathways that may be targeted for AMD therapy is of great importance, given the lack of therapeutic options for over 85% of patients with this disease. Herein we review this relatively new field and recent findings supporting the hypothesis that the eye is a secondary endocrine organ, in which nuclear receptors serve as the bedrock for biological processes in cells vulnerable in AMD, including retinal pigment epithelial and choroidal endothelial cells, and discuss the therapeutic potential of targeting these receptors for AMD.
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Affiliation(s)
- Mayur Choudhary
- Duke Eye Center, Department of Ophthalmology, Duke University School of Medicine, Durham, NC, USA
| | - Goldis Malek
- Duke Eye Center, Department of Ophthalmology, Duke University School of Medicine, Durham, NC, USA; Department of Pathology, Duke University School of Medicine, Durham, NC, USA.
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Sonsalla MM, Lamming DW. Geroprotective interventions in the 3xTg mouse model of Alzheimer's disease. GeroScience 2023:10.1007/s11357-023-00782-w. [PMID: 37022634 PMCID: PMC10400530 DOI: 10.1007/s11357-023-00782-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/23/2023] [Indexed: 04/07/2023] Open
Abstract
Alzheimer's disease (AD) is an age-associated neurodegenerative disease. As the population ages, the increasing prevalence of AD threatens massive healthcare costs in the coming decades. Unfortunately, traditional drug development efforts for AD have proven largely unsuccessful. A geroscience approach to AD suggests that since aging is the main driver of AD, targeting aging itself may be an effective way to prevent or treat AD. Here, we discuss the effectiveness of geroprotective interventions on AD pathology and cognition in the widely utilized triple-transgenic mouse model of AD (3xTg-AD) which develops both β-amyloid and tau pathologies characteristic of human AD, as well as cognitive deficits. We discuss the beneficial impacts of calorie restriction (CR), the gold standard for geroprotective interventions, and the effects of other dietary interventions including protein restriction. We also discuss the promising preclinical results of geroprotective pharmaceuticals, including rapamycin and medications for type 2 diabetes. Though these interventions and treatments have beneficial effects in the 3xTg-AD model, there is no guarantee that they will be as effective in humans, and we discuss the need to examine these interventions in additional animal models as well as the urgent need to test if some of these approaches can be translated from the lab to the bedside for the treatment of humans with AD.
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Affiliation(s)
- Michelle M Sonsalla
- Department of Medicine, University of Wisconsin-Madison, 2500 Overlook Terrace, VAH C3127 Research 151, Madison, WI, 53705, USA
- William S. Middleton Memorial Veterans Hospital, Madison, WI, 53705, USA
- Comparative Biomedical Sciences Graduate Program, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Dudley W Lamming
- Department of Medicine, University of Wisconsin-Madison, 2500 Overlook Terrace, VAH C3127 Research 151, Madison, WI, 53705, USA.
- William S. Middleton Memorial Veterans Hospital, Madison, WI, 53705, USA.
- Comparative Biomedical Sciences Graduate Program, University of Wisconsin-Madison, Madison, WI, 53706, USA.
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Revisiting the Role of Vitamins and Minerals in Alzheimer's Disease. Antioxidants (Basel) 2023; 12:antiox12020415. [PMID: 36829974 PMCID: PMC9952129 DOI: 10.3390/antiox12020415] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/02/2023] [Accepted: 02/03/2023] [Indexed: 02/11/2023] Open
Abstract
Alzheimer's disease (AD) is the most common type of dementia that affects millions of individuals worldwide. It is an irreversible neurodegenerative disorder that is characterized by memory loss, impaired learning and thinking, and difficulty in performing regular daily activities. Despite nearly two decades of collective efforts to develop novel medications that can prevent or halt the disease progression, we remain faced with only a few options with limited effectiveness. There has been a recent growth of interest in the role of nutrition in brain health as we begin to gain a better understanding of what and how nutrients affect hormonal and neural actions that not only can lead to typical cardiovascular or metabolic diseases but also an array of neurological and psychiatric disorders. Vitamins and minerals, also known as micronutrients, are elements that are indispensable for functions including nutrient metabolism, immune surveillance, cell development, neurotransmission, and antioxidant and anti-inflammatory properties. In this review, we provide an overview on some of the most common vitamins and minerals and discuss what current studies have revealed on the link between these essential micronutrients and cognitive performance or AD.
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Li Z, Li S, Xiao Y, Zhong T, Yu X, Wang L. Nutritional intervention for diabetes mellitus with Alzheimer's disease. Front Nutr 2022; 9:1046726. [DOI: 10.3389/fnut.2022.1046726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 10/31/2022] [Indexed: 11/17/2022] Open
Abstract
The combined disease burden of diabetes mellitus (DM) and Alzheimer's disease (AD) is increasing, and the two diseases share some common pathological changes. However, the pharmacotherapeutic approach to this clinical complexity is limited to symptomatic rather than disease-arresting, with the possible exception of metformin. Whether nutritional intervention might extend or synergize with these effects of metformin is of interest. In particular, dietary patterns with an emphasis on dietary diversity shown to affect cognitive function are of growing interest in a range of food cultural settings. This paper presents the association between diabetes and AD. In addition, the cross-cultural nutritional intervention programs with the potential to mitigate both insulin resistance (IR) and hyperglycemia, together with cognitive impairment are also reviewed. Both dietary patterns and nutritional supplementation showed the effects of improving glycemic control and reducing cognitive decline in diabetes associated with AD, but the intervention specificity remained controversial. Multi-nutrient supplements combined with diverse diets may have preventive and therapeutic potential for DM combined with AD, at least as related to the B vitamin group and folate-dependent homocysteine (Hcy). The nutritional intervention has promise in the prevention and management of DM and AD comorbidities, and more clinical studies would be of nutritional scientific merit.
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Rinaudo M, Natale F, La Greca F, Spinelli M, Farsetti A, Paciello F, Fusco S, Grassi C. Hippocampal Estrogen Signaling Mediates Sex Differences in Retroactive Interference. Biomedicines 2022; 10:biomedicines10061387. [PMID: 35740410 PMCID: PMC9219958 DOI: 10.3390/biomedicines10061387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/08/2022] [Accepted: 06/10/2022] [Indexed: 11/16/2022] Open
Abstract
Despite being a crucial physiological function of the brain, the mechanisms underlying forgetting are still poorly understood. Estrogens play a critical role in different brain functions, including memory. However, the effects of sex hormones on forgetting vulnerabilitymediated by retroactive interference (RI), a phenomenon in which newly acquired information interferes with the retrieval of already stored information, are still poorly understood. The aim of our study was to characterize the sex differences in interference-mediated forgetting and identify the underlying molecular mechanisms. We found that adult male C57bl/6 mice showed a higher susceptibility to RI-dependent memory loss than females. The preference index (PI) in the NOR paradigm was 52.7 ± 5.9% in males and 62.3 ± 13.0% in females. The resistance to RI in female mice was mediated by estrogen signaling involving estrogen receptor α activation in the dorsal hippocampus. Accordingly, following RI, females showed higher phosphorylation levels (+30%) of extracellular signal-regulated kinase1/2 (ERK1/2) in the hippocampus. Pharmacological inhibition of ERK1/2 made female mice prone to RI. The PI was 70.6 ± 11.0% in vehicle-injected mice and 47.4 ± 10.8% following PD98059 administration. Collectively, our data suggest that hippocampal estrogen α receptor-ERK1/2 signaling is critically involved in a pattern separation mechanism that inhibits object-related RI in female mice.
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Affiliation(s)
- Marco Rinaudo
- Department of Neuroscience, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (F.N.); (F.L.G.); (M.S.); (F.P.); (S.F.); (C.G.)
- Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy
- Correspondence:
| | - Francesca Natale
- Department of Neuroscience, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (F.N.); (F.L.G.); (M.S.); (F.P.); (S.F.); (C.G.)
- Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy
| | - Francesco La Greca
- Department of Neuroscience, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (F.N.); (F.L.G.); (M.S.); (F.P.); (S.F.); (C.G.)
| | - Matteo Spinelli
- Department of Neuroscience, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (F.N.); (F.L.G.); (M.S.); (F.P.); (S.F.); (C.G.)
- Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy
| | - Antonella Farsetti
- Institute for System Analysis and Computer Science “A. Ruberti” (IASI), National Research Council (CNR), 00185 Rome, Italy;
| | - Fabiola Paciello
- Department of Neuroscience, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (F.N.); (F.L.G.); (M.S.); (F.P.); (S.F.); (C.G.)
- Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy
| | - Salvatore Fusco
- Department of Neuroscience, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (F.N.); (F.L.G.); (M.S.); (F.P.); (S.F.); (C.G.)
- Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy
| | - Claudio Grassi
- Department of Neuroscience, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (F.N.); (F.L.G.); (M.S.); (F.P.); (S.F.); (C.G.)
- Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy
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Pouso MR, Cairrao E. Effect of retinoic acid on the neurovascular unit: A review. Brain Res Bull 2022; 184:34-45. [DOI: 10.1016/j.brainresbull.2022.03.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 03/08/2022] [Accepted: 03/21/2022] [Indexed: 12/12/2022]
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