1
|
Jeong SP, Sharma N, An SSA. Role of Calcitriol and Vitamin D Receptor ( VDR) Gene Polymorphisms in Alzheimer's Disease. Int J Mol Sci 2024; 25:4806. [PMID: 38732025 PMCID: PMC11084202 DOI: 10.3390/ijms25094806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 02/21/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024] Open
Abstract
Alzheimer's disease (AD) is characterized by amyloid beta (Aβ) buildup and neuronal degeneration. An association between low serum vitamin D levels and an increased risk of AD has been reported in several epidemiological studies. Calcitriol (1,25-dihydroxycholecalciferol) is the active form of vitamin D, and is generated in the kidney and many other tissues/organs, including the brain. It is a steroid hormone that regulates important functions like calcium/phosphorous levels, bone mineralization, and immunomodulation, indicating its broader systemic significance. In addition, calcitriol confers neuroprotection by mitigating oxidative stress and neuroinflammation, promoting the clearance of Aβ, myelin formation, neurogenesis, neurotransmission, and autophagy. The receptors to which calcitriol binds (vitamin D receptors; VDRs) to exert its effects are distributed over many organs and tissues, representing other significant roles of calcitriol beyond sustaining bone health. The biological effects of calcitriol are manifested through genomic (classical) and non-genomic actions through different pathways. The first is a slow genomic effect involving nuclear VDR directly affecting gene transcription. The association of AD with VDR gene polymorphisms relies on the changes in vitamin D consumption, which lowers VDR expression, protein stability, and binding affinity. It leads to the altered expression of genes involved in the neuroprotective effects of calcitriol. This review summarizes the neuroprotective mechanism of calcitriol and the role of VDR polymorphisms in AD, and might help develop potential therapeutic strategies and markers for AD in the future.
Collapse
Affiliation(s)
| | - Niti Sharma
- Bionano Research Institute, Gachon University, 1342 Seongnam-daero, Sujung-gu, Seongnam-si 461-701, Republic of Korea
| | - Seong Soo A. An
- Bionano Research Institute, Gachon University, 1342 Seongnam-daero, Sujung-gu, Seongnam-si 461-701, Republic of Korea
| |
Collapse
|
2
|
Chen LJ, Sha S, Stocker H, Brenner H, Schöttker B. The associations of serum vitamin D status and vitamin D supplements use with all-cause dementia, Alzheimer's disease, and vascular dementia: a UK Biobank based prospective cohort study. Am J Clin Nutr 2024; 119:1052-1064. [PMID: 38296029 PMCID: PMC11007746 DOI: 10.1016/j.ajcnut.2024.01.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 01/15/2024] [Accepted: 01/24/2024] [Indexed: 02/15/2024] Open
Abstract
BACKGROUND Prior studies on vitamin D and dementia outcomes yielded mixed results and had several important limitations. OBJECTIVES We aimed to assess the associations of both serum vitamin D status and supplementation with all-cause dementia, Alzheimer's disease (AD), and vascular dementia (VD) incidence. METHODS With a prospective cohort study design, we comprehensively assessed the associations of vitamin D and multivitamin supplementation, as well as vitamin D deficiency {25-hydroxyvitamin D [25(OH)D] <30 nmol/L}, and insufficiency [25(OH)D 30 to <50 nmol/L], with the 14-year incidence of all-cause dementia, AD, and VD in 269,229 participants, aged 55 to 69, from the UK Biobank. RESULTS Although 5.0% reported regular vitamin D use and 19.8% reported multivitamin use, the majority of participants exhibited either vitamin D deficiency (18.3%) or insufficiency (34.0%). However, vitamin D deficiency was less prevalent among users of vitamin D (6.9%) or multivitamin preparations (9.5%) than among nonusers (21.5%). Adjusted Cox regression models demonstrated 19% to 25% increased risk of all 3 dementia outcomes for those with vitamin D deficiency [hazard ratio (HR) 95% confidence interval (CI)]: 1.25 (1.16, 1.34) for all-cause dementia; 1.19 (1.07-1.31) for AD; 1.24 (1.08-1.43) for VD] and 10% to 15% increased risk of those with vitamin D insufficiency [HR (95% CI): 1.11 (1.05, 1.18) for all-cause dementia; 1.10 (1.02-1.19) for AD; 1.15 (1.03-1.29) for VD]. Regular users of vitamin D and multivitamins had 17% and 14% lower risk of AD [HR (95% CI): 0.83 (0.71, 0.98)] and VD [HR (95% CI): 0.86 (0.75, 0.98)] incidence, respectively. CONCLUSIONS Although our findings indicate the potential benefits of vitamin D supplementation for dementia prevention, randomized controlled trials are essential for definitive evidence.
Collapse
Affiliation(s)
- Li-Ju Chen
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ). Im Neuenheimer Feld 581, Heidelberg, Germany
| | - Sha Sha
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ). Im Neuenheimer Feld 581, Heidelberg, Germany
| | - Hannah Stocker
- Network Aging Research, Heidelberg University, Heidelberg, Germany
| | - Hermann Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ). Im Neuenheimer Feld 581, Heidelberg, Germany; Network Aging Research, Heidelberg University, Heidelberg, Germany; Division of Preventive Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), Heidelberg, Germany; German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Ben Schöttker
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ). Im Neuenheimer Feld 581, Heidelberg, Germany; Network Aging Research, Heidelberg University, Heidelberg, Germany.
| |
Collapse
|
3
|
Plantone D, Pardini M, Caneva S, De Stefano N. Is There a Role of Vitamin D in Alzheimer's Disease? CNS Neurol Disord Drug Targets 2024; 23:545-553. [PMID: 37246320 DOI: 10.2174/1871527322666230526164421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 04/05/2023] [Accepted: 04/19/2023] [Indexed: 05/30/2023]
Abstract
Alzheimer's disease (AD) represents the most prevalent type of neurodegenerative dementia and the sixth leading cause of death worldwide. The so-called "non-calcemic actions" of vitamin D have been increasingly described, and its insufficiency has already been linked to the onset and progression of the main neurological diseases, including AD. Immune-mediated Aβ plaque's phagocytosis and clearance, immune response, oxidative stress, and mitochondrial function are all influenced by vitamin D, and these functions are considered relevant in AD pathogenesis. However, it has been shown that the genomic vitamin D signaling pathway is already impaired in the AD brain, making things more complicated. In this paper, we aim to summarise the role of vitamin D in AD and review the results of the supplementation trials in AD patients.
Collapse
Affiliation(s)
- Domenico Plantone
- Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| | - Matteo Pardini
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genova, Italy
- IRCCS Ospedale Policlinico San Martino, Genova, Italy
| | - Stefano Caneva
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genova, Italy
| | - Nicola De Stefano
- Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| |
Collapse
|
4
|
Zeqaj I, Piffero R, Calzaducca E, Pirisi M, Bellan M. The Potential Role of Vitamin D Supplementation in Cognitive Impairment Prevention. CNS Neurol Disord Drug Targets 2024; 23:628-637. [PMID: 36998124 DOI: 10.2174/1871527322666230328130417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 02/12/2023] [Accepted: 02/14/2023] [Indexed: 04/01/2023]
Abstract
BACKGROUND Vitamin D is implicated in many processes in the central nervous system (CNS), such as neurogenesis, neurotransmitter synthesis, synaptogenesis and protection against oxidative stress, thereby exerting a neuroprotective effect. OBJECTIVE In the present review, we aimed to evaluate the potential benefit(s) of vitamin D supplementation for CNS aging in different clinical contexts. METHODS We performed a literature search, looking for clinical trials and randomized clinical trials evaluating the effect of vitamin D supplementation on different endpoints related to cognitive outcomes. RESULTS Firstly, we identified 16 papers dealing with the impact of vitamin D supplementation on cognitive function in healthy subjects; the current literature suggests a real role for vitamin D supplementation in the prevention of cognitive decay in this clinical setting. Conversely, two papers suggest that vitamin D supplementation may be beneficial in patients with mild cognitive impairment (MCI). Finally, current data on vitamin D in Alzheimer's disease are contradictory. CONCLUSION Vitamin D supplementation may improve the cognitive outcomes of patients with MCI, whereas there is no evidence that it may prevent dementia or modulate the course of Alzheimer's disease.
Collapse
Affiliation(s)
- Iris Zeqaj
- Department of Translational Medicine (DiMeT), Università del Piemonte Orientale UPO, Novara, Italy
- Division of Internal Medicine, "AOU Maggiore della Carità", Novara, Italy
| | - Roberto Piffero
- Department of Translational Medicine (DiMeT), Università del Piemonte Orientale UPO, Novara, Italy
- Division of Internal Medicine, "AOU Maggiore della Carità", Novara, Italy
| | - Elisa Calzaducca
- Department of Translational Medicine (DiMeT), Università del Piemonte Orientale UPO, Novara, Italy
- Division of Internal Medicine, "AOU Maggiore della Carità", Novara, Italy
| | - Mario Pirisi
- Department of Translational Medicine (DiMeT), Università del Piemonte Orientale UPO, Novara, Italy
- Division of Internal Medicine, "AOU Maggiore della Carità", Novara, Italy
- CAAD, (Center for Translational Research on Autoimmune and Allergic Disease) Università del Piemonte Orientale UPO, Novara, Italy
| | - Mattia Bellan
- Department of Translational Medicine (DiMeT), Università del Piemonte Orientale UPO, Novara, Italy
- Division of Internal Medicine, "AOU Maggiore della Carità", Novara, Italy
- CAAD, (Center for Translational Research on Autoimmune and Allergic Disease) Università del Piemonte Orientale UPO, Novara, Italy
| |
Collapse
|
5
|
Fekete M, Lehoczki A, Tarantini S, Fazekas-Pongor V, Csípő T, Csizmadia Z, Varga JT. Improving Cognitive Function with Nutritional Supplements in Aging: A Comprehensive Narrative Review of Clinical Studies Investigating the Effects of Vitamins, Minerals, Antioxidants, and Other Dietary Supplements. Nutrients 2023; 15:5116. [PMID: 38140375 PMCID: PMC10746024 DOI: 10.3390/nu15245116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/09/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
Cognitive impairment and dementia are burgeoning public health concerns, especially given the increasing longevity of the global population. These conditions not only affect the quality of life of individuals and their families, but also pose significant economic burdens on healthcare systems. In this context, our comprehensive narrative review critically examines the role of nutritional supplements in mitigating cognitive decline. Amidst growing interest in non-pharmacological interventions for cognitive enhancement, this review delves into the efficacy of vitamins, minerals, antioxidants, and other dietary supplements. Through a systematic evaluation of randomized controlled trials, observational studies, and meta-analysis, this review focuses on outcomes such as memory enhancement, attention improvement, executive function support, and neuroprotection. The findings suggest a complex interplay between nutritional supplementation and cognitive health, with some supplements showing promising results and others displaying limited or context-dependent effectiveness. The review highlights the importance of dosage, bioavailability, and individual differences in response to supplementation. Additionally, it addresses safety concerns and potential interactions with conventional treatments. By providing a clear overview of current scientific knowledge, this review aims to guide healthcare professionals and researchers in making informed decisions about the use of nutritional supplements for cognitive health.
Collapse
Affiliation(s)
- Mónika Fekete
- Department of Public Health, Faculty of Medicine, Semmelweis University, 1089 Budapest, Hungary; (M.F.); (S.T.)
| | - Andrea Lehoczki
- National Institute for Haematology and Infectious Diseases, Department of Haematology and Stem Cell Transplantation, South Pest Central Hospital, 1097 Budapest, Hungary;
| | - Stefano Tarantini
- Department of Public Health, Faculty of Medicine, Semmelweis University, 1089 Budapest, Hungary; (M.F.); (S.T.)
- Department of Neurosurgery, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- Department of Health Promotion Sciences, College of Public Health, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- Peggy and Charles Stephenson Oklahoma Cancer Center, Oklahoma City, OK 73104, USA
| | - Vince Fazekas-Pongor
- Department of Public Health, Faculty of Medicine, Semmelweis University, 1089 Budapest, Hungary; (M.F.); (S.T.)
| | - Tamás Csípő
- Department of Public Health, Faculty of Medicine, Semmelweis University, 1089 Budapest, Hungary; (M.F.); (S.T.)
| | - Zoltán Csizmadia
- Faculty of Health Sciences, University of Pécs, 7621 Pécs, Hungary;
| | - János Tamás Varga
- Department of Pulmonology, Semmelweis University, 1083 Budapest, Hungary
| |
Collapse
|
6
|
Chen WY, Cheng YC, Chiu CC, Liu HC, Huang MC, Tu YK, Kuo PH. Effects of Vitamin D Supplementation on Cognitive Outcomes: A Systematic Review and Meta-Analysis. Neuropsychol Rev 2023:10.1007/s11065-023-09598-z. [PMID: 37418225 DOI: 10.1007/s11065-023-09598-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 05/11/2023] [Indexed: 07/08/2023]
Abstract
Clinical studies examining the effects of vitamin D on cognition have reported inconsistent results. To date, no comprehensive study has examined this effect on the basis of sample characteristics or intervention model-related factors. This systematic review and meta-analysis of randomized controlled trials investigated the effects of vitamin D supplementation on global cognitive function and specific cognitive domains. This review was preregistered in the PROSPERO database (CRD42021249908) and comprised 24 trials enrolling 7557 participants (mean age: 65.21 years; 78.54% women). The meta-analysis revealed that vitamin D significantly influenced global cognition (Hedges' g = 0.128, p = .008) but not specific cognitive domains. A subgroup analysis indicated that the effect size of vitamin D was stronger for vulnerable populations (Hedges' g = 0.414) and those with baseline vitamin D deficiency (Hedges' g = 0.480). On the basis of subgroup analyses in studies without biological flaws (Hedges' g = 0.549), we suggest that an intervention model should correct baseline vitamin D deficiency. Our results indicate that vitamin D supplementation has a small but significant positive effect on cognition in adults.
Collapse
Affiliation(s)
- Wen-Yin Chen
- Department of Psychiatry, Taipei City Psychiatric Center, Taipei City Hospital, Taipei, Taiwan
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
- School of Medicine, College of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Ying-Chih Cheng
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
- Department of Psychiatry, China Medical University Hsinchu Hospital, China Medical University, Hsinchu, Taiwan
- Research Center of Big Data and Meta-analysis, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Chih-Chiang Chiu
- Department of Psychiatry, Taipei City Psychiatric Center, Taipei City Hospital, Taipei, Taiwan
- Department of Psychiatry, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Hsing-Cheng Liu
- Department of Psychiatry, Taipei City Psychiatric Center, Taipei City Hospital, Taipei, Taiwan
- Department of Psychiatry, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ming-Chyi Huang
- Department of Psychiatry, Taipei City Psychiatric Center, Taipei City Hospital, Taipei, Taiwan
- Department of Psychiatry, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yu-Kang Tu
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan.
- Department of Public Health, College of Public Health, National Taiwan University, Taipei, Taiwan.
| | - Po-Hsiu Kuo
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan.
- Department of Public Health, College of Public Health, National Taiwan University, Taipei, Taiwan.
- Department of Psychiatry, National Taiwan University Hospital, Taipei, Taiwan.
- College of Public Health, Health Behaviors and Community Sciences, National Taiwan University, Taipei, Taiwan.
| |
Collapse
|
7
|
Pham H, Waterhouse M, Rahman S, Baxter C, Romero BD, McLeod DSA, Armstrong BK, Ebeling PR, English DR, Hartel G, Kimlin MG, O'Connell RL, van der Pols JC, Venn AJ, Webb PM, Whiteman DC, Almeida OP, Neale RE. Vitamin D supplementation and cognition-Results from analyses of the D-Health trial. J Am Geriatr Soc 2023; 71:1773-1784. [PMID: 36715270 DOI: 10.1111/jgs.18247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 12/15/2022] [Accepted: 12/26/2022] [Indexed: 01/31/2023]
Abstract
BACKGROUND Observational studies have consistently found a link between low serum 25-hydroxyvitamin D concentration and higher risk of cognitive impairment. Results from randomized controlled trials have been mixed, and few have been conducted in the general population. METHODS We recruited 21,315 community-dwelling Australians aged between 60 and 84 years to participate in the D-Health Trial, a randomized, double-blind, placebo-controlled trial. The intervention was monthly oral doses of 60,000 international units of vitamin D or placebo for 5 years. We assessed cognitive function in a randomly sampled group of participants aged ≥70 years using the Telephone Interview for Cognitive Status (TICS) at 2 and 5 years after randomization. The primary outcome for this analysis was TICS score; the secondary outcome was the proportion of people who had cognitive impairment (defined as TICS score ≤25). We analyzed data using mixed models (linear and logistic). RESULTS We interviewed 3887 participants at year 2 and 3614 participants at year 5. The mean TICS score at these time points was 32.3 and 32.2, respectively. Vitamin D supplementation did not affect cognitive function as measured by TICS score (mean difference between vitamin D and placebo groups 0.04; 95% CI -0.14 to 0.23), or alter risk of cognitive impairment (odds ratio 1.00; 95% CI 0.75 to 1.33). CONCLUSIONS Monthly bolus doses of vitamin D supplementation neither enhanced nor hindered cognitive function among older adults. Population-wide vitamin D supplementation of older adults that are largely vitamin D replete is unlikely to substantially benefit cognition.
Collapse
Affiliation(s)
- Hai Pham
- Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, Australia
- School of Public Health, University of Queensland, Brisbane, Australia
| | - Mary Waterhouse
- Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Sabbir Rahman
- Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Catherine Baxter
- Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Briony Duarte Romero
- Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Donald S A McLeod
- Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, Australia
- Department of Endocrinology and Diabetes, Royal Brisbane and Women's Hospital, Brisbane, Australia
| | | | - Peter R Ebeling
- Department of Medicine, School of Clinical Sciences, Monash University, Melbourne, Australia
| | - Dallas R English
- Melbourne School of Population Health, University of Melbourne, and Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, Australia
| | - Gunter Hartel
- Statistics Group, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Michael G Kimlin
- School of Biomedical Sciences, Queensland University of Technology, Australia
| | | | - Jolieke C van der Pols
- Faculty of Health, School of Exercise and Nutrition Sciences, Queensland University of Technology (QUT), Brisbane, Australia
| | - Alison J Venn
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Penelope M Webb
- Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, Australia
- School of Public Health, University of Queensland, Brisbane, Australia
| | - David C Whiteman
- Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, Australia
- School of Public Health, University of Queensland, Brisbane, Australia
| | | | - Rachel E Neale
- Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, Australia
- School of Public Health, University of Queensland, Brisbane, Australia
| |
Collapse
|
8
|
Gezen-Ak D, Dursun E. Vitamin D, a Secosteroid Hormone and Its Multifunctional Receptor, Vitamin D Receptor, in Alzheimer's Type Neurodegeneration. J Alzheimers Dis 2023; 95:1273-1299. [PMID: 37661883 DOI: 10.3233/jad-230214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Vitamin D is a secosteroid hormone exerting neurosteroid-like properties. Its well-known nuclear hormone receptor, and recently proposed as a mitochondrial transcription factor, vitamin D receptor, acts for its primary functions. The second receptor is an endoplasmic reticulum protein, protein disulfide isomerase A3 (PDIA3), suggested to act as a rapid response. Vitamin D has effects on various systems, particularly through calcium metabolism. Among them, the nervous system has an important place in the context of our subject. Recent studies have shown that vitamin D and its receptors have numerous effects on the nervous system. Neurodegeneration is a long-term process. Throughout a human life span, so is vitamin D deficiency. Our previous studies and others have suggested that the out-come of long-term vitamin D deficiency (hypovitaminosis D or inefficient utilization of vitamin D), may lead neurons to be vulnerable to aging and neurodegeneration. We suggest that keeping vitamin D levels at adequate levels at all stages of life, considering new approaches such as agonists that can activate vitamin D receptors, and utilizing other derivatives produced in the synthesis process with UVB are crucial when considering vitamin D-based intervention studies. Given most aspects of vitamin D, this review outlines how vitamin D and its receptors work and are involved in neurodegeneration, emphasizing Alzheimer's disease.
Collapse
Affiliation(s)
- Duygu Gezen-Ak
- Department of Neuroscience, Brain and Neurodegenerative Disorders Research Laboratories, Institute of Neurological Sciences, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Erdinc Dursun
- Department of Neuroscience, Brain and Neurodegenerative Disorders Research Laboratories, Institute of Neurological Sciences, Istanbul University-Cerrahpasa, Istanbul, Turkey
| |
Collapse
|
9
|
Ghahremani M, Smith EE, Chen HY, Creese B, Goodarzi Z, Ismail Z. Vitamin D supplementation and incident dementia: Effects of sex, APOE, and baseline cognitive status. Alzheimers Dement (Amst) 2023; 15:e12404. [PMID: 36874594 PMCID: PMC9976297 DOI: 10.1002/dad2.12404] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 01/13/2023] [Accepted: 01/19/2023] [Indexed: 03/06/2023]
Abstract
Introduction Despite the association of vitamin D deficiency with incident dementia, the role of supplementation is unclear. We prospectively explored associations between vitamin D supplementation and incident dementia in 12,388 dementia-free persons from the National Alzheimer's Coordinating Center. Methods Baseline exposure to vitamin D was considered D+; no exposure prior to dementia onset was considered D-. Kaplan-Meier curves compared dementia-free survival between groups. Cox models assessed dementia incidence rates across groups, adjusted for age, sex, education, race, cognitive diagnosis, depression, and apolipoprotein E (APOE) ε4. Sensitivity analyses examined incidence rates for each vitamin D formulation. Potential interactions between exposure and model covariates were explored. Results Across all formulations, vitamin D exposure was associated with significantly longer dementia-free survival and lower dementia incidence rate than no exposure (hazard ratio = 0.60, 95% confidence interval: 0.55-0.65). The effect of vitamin D on incidence rate differed significantly across the strata of sex, cognitive status, and APOE ε4 status. Discussion Vitamin D may be a potential agent for dementia prevention. Highlights In a prospective cohort study, we assessed effects of Vitamin D on dementia incidence in 12,388 participants from the National Alzheimer's Coordinating Center dataset.Vitamin D exposure was associated with 40% lower dementia incidence versus no exposure.Vitamin D effects were significantly greater in females versus males and in normal cognition versus mild cognitive impairment.Vitamin D effects were significantly greater in apolipoprotein E ε4 non-carriers versus carriers.Vitamin D has potential for dementia prevention, especially in the high-risk strata.
Collapse
Affiliation(s)
- Maryam Ghahremani
- Department of Psychiatry Cumming School of Medicine University of Calgary Calgary Alberta Canada.,Hotchkiss Brain Institute Cumming School of Medicine University of Calgary Calgary Alberta Canada
| | - Eric E Smith
- Hotchkiss Brain Institute Cumming School of Medicine University of Calgary Calgary Alberta Canada.,Department of Community Health Sciences University of Calgary Calgary Alberta Canada.,Department of Clinical Neurosciences Cumming School of Medicine University of Calgary Calgary Alberta Canada
| | - Hung-Yu Chen
- Department of Psychiatry Cumming School of Medicine University of Calgary Calgary Alberta Canada.,Hotchkiss Brain Institute Cumming School of Medicine University of Calgary Calgary Alberta Canada
| | - Byron Creese
- College of Medicine and Health University of Exeter Medical School University of Exeter Exeter UK
| | - Zahra Goodarzi
- Hotchkiss Brain Institute Cumming School of Medicine University of Calgary Calgary Alberta Canada.,Department of Community Health Sciences University of Calgary Calgary Alberta Canada.,O'Brien Institute of Public Health University of Calgary Calgary Alberta Canada
| | - Zahinoor Ismail
- Department of Psychiatry Cumming School of Medicine University of Calgary Calgary Alberta Canada.,Hotchkiss Brain Institute Cumming School of Medicine University of Calgary Calgary Alberta Canada.,Department of Community Health Sciences University of Calgary Calgary Alberta Canada.,Department of Clinical Neurosciences Cumming School of Medicine University of Calgary Calgary Alberta Canada.,College of Medicine and Health University of Exeter Medical School University of Exeter Exeter UK.,O'Brien Institute of Public Health University of Calgary Calgary Alberta Canada
| |
Collapse
|
10
|
Plantone D, Primiano G, Manco C, Locci S, Servidei S, De Stefano N. Vitamin D in Neurological Diseases. Int J Mol Sci 2022; 24. [PMID: 36613531 DOI: 10.3390/ijms24010087] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/16/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
Vitamin D may have multiple effects on the nervous system and its deficiency can represent a possible risk factor for the development of many neurological diseases. Recent studies are also trying to clarify the different effects of vitamin D supplementation over the course of progressive neurological diseases. In this narrative review, we summarise vitamin D chemistry, metabolism, mechanisms of action, and the recommended daily intake. The role of vitamin D on gene transcription and the immune response is also reviewed. Finally, we discuss the scientific evidence that links low 25-hydroxyvitamin D concentrations to the onset and progression of severe neurological diseases, such as multiple sclerosis, Parkinson's disease, Alzheimer's disease, migraine, diabetic neuropathy and amyotrophic lateral sclerosis. Completed and ongoing clinical trials on vitamin D supplementation in neurological diseases are listed.
Collapse
|
11
|
Lu S, Yang Y, Xu Q, Wang S, Yu J, Zhang B, Wang Z, Zhang Y, Lu W, Hong K. Gut Microbiota and Targeted Biomarkers Analysis in Patients With Cognitive Impairment. Front Neurol 2022; 13:834403. [PMID: 35250836 PMCID: PMC8891499 DOI: 10.3389/fneur.2022.834403] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 01/06/2022] [Indexed: 01/15/2023] Open
Abstract
Gut microbial alteration is closely associated with brain disorders including cognitive impairment (CI). Gut microbes have the potential to predicate the development of diseases. However, the gut microbial markers for CI remain to be elucidated. In this study, the gut microbial alterations were assessed using16S rRNA sequencing, and identified the gut microbial markers using a random forest model. The results showed that there were significant gut microbial differences between the control and CI groups based on beta diversity (p < 0.002). Patients with CI had higher abundances of Actinobacteria and Proteobacteria but lower proportions of Bcateroidetes and Firmicutes vs. that in the control group. Patients had 39 special genera and the control subjects had 11 special genera. Furthermore, 11 genera such as Blautia, Roseburia, and Lactococcus and 18 genera such as Lactobacillus, Ruminococcus 2, and Akkermansia were the differential taxa in the control and CI groups, respectively. Gene functions related to nutrient metabolisms were upregulated in patients with CI. This suggested that the huge differences in gut microbes between the two groups and gut microbiota had the potential to predicate the development of CI. Based on machine learning results, 15 genera such as Lactobacillus, Bifidobacterium, and Akkermansia were selected as the optimal marker set to predicate CI with an area under curve (AUC) value of 78.4%. The results revealed the gut microbial markers for CI and provided a potential diagnosis tool to prevent the development of CI in the elderly.
Collapse
Affiliation(s)
- Shourong Lu
- Department of Geriatric, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Ying Yang
- Department of Geriatric, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Qiao Xu
- Department of Geriatric, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Shuqiang Wang
- Department of Medicine, Wuxi Xin'an Community Health Service Center, Wuxi, China
| | - Jie Yu
- Department of Geriatric, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Bingshan Zhang
- Department of Geriatric, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Zhuo Wang
- Department of Geriatric, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Yunyun Zhang
- Department of General Practice, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
- *Correspondence: Yunyun Zhang
| | - Wenwei Lu
- State Key Laboratory of Food Science and Technology and School of Food Science and Technology, Jiangnan University, Wuxi, China
- Wenwei Lu
| | - Kan Hong
- Department of Geriatric, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
- Kan Hong
| |
Collapse
|
12
|
da Silva ABJ, Barros WMA, da Silva ML, Silva JML, Souza APDS, da Silva KG, de Sousa Fernandes MS, Carneiro ACBDF, Souza VDON, Lagranha CJ. Impact of vitamin D on cognitive functions in healthy individuals: A systematic review in randomized controlled clinical trials. Front Psychol 2022; 13:987203. [PMID: 36524160 PMCID: PMC9745323 DOI: 10.3389/fpsyg.2022.987203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 10/07/2022] [Indexed: 11/30/2022] Open
Abstract
Various functions in the central nervous system, such as growth, development, and cognition can be influenced by vitamins and minerals, which are capable of helping to maintain brain health and function throughout life. Cognition is understood as the aspects related to knowledge, learning, and understanding, as well as the ability to develop these functions. A possible association between low levels of vit D and deficit in the performance of cognitive functions in healthy humans or with some pathological condition is discussed. Because of this, the present systematic review analyzed only randomized clinical trials carried out in healthy non-athlete adults about intellectual and/or mental processes involving cognitive functions to identify whether these individuals with different levels of vit D are capable of interfering with the performance of the cognitive function. To do so, we adopted the PRISMA method criteria and registered it in the PROSPERO database. The search was performed in PubMed (MEDLINE), PsycINFO, Science Direct, Scopus, and Web of Science databases, 2,167 records were identified. The 5 most frequent cognitive domains in the selected studies were: processing speed, attention, verbal learning/memory, executive function, and general cognitive functions. We found that there are positive changes in the following domains: verbal memory and verbal working memory, learning memory, attention, executive function, and also cognitive function in general. We highlight the following suggestions for improvements that vitamin D supplementation may promote in the cognitive domains of healthy adults: a) low doses between 400 and 600 IU/d seem to be more effective when compared to doses between 2,400 and 5,000 IU/d and b) food fortification and enrichment with vit D, need further studies, as they seem to be more or as effective as synthetic supplementation. We evident that there is a need for trials that evaluate the control of vit D levels for healthy adult individuals is important, as they have the potential to minimize health problems, especially those involved in the reduction of cognitive abilities. Thus, the development of more clinical trials to obtain satisfactory answers on this topic needs to be encouraged. Systematic review registration https://www.crd.york.ac.uk/PROSPERO/, identifier: CRD42021262413.
Collapse
Affiliation(s)
- Ana Beatriz Januário da Silva
- Programa de Pós-graduação em Neuropsiquiatria e Ciências do Comportamento, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, Recife, PE, Brazil.,Centro Integrado de Tecnologias em Neurociência (CITENC), Centro Universitário Osman Lins (UNIFACOL), Vitória de Santo Antão, PE, Brazil
| | - Waleska Maria Almeida Barros
- Programa de Pós-graduação em Neuropsiquiatria e Ciências do Comportamento, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, Recife, PE, Brazil.,Centro Integrado de Tecnologias em Neurociência (CITENC), Centro Universitário Osman Lins (UNIFACOL), Vitória de Santo Antão, PE, Brazil
| | - Mayara Luclécia da Silva
- Centro Integrado de Tecnologias em Neurociência (CITENC), Centro Universitário Osman Lins (UNIFACOL), Vitória de Santo Antão, PE, Brazil.,Programa de Pós-graduação Multicêntrico em Ciências Fisiológicas, Centro Acadêmico de Vitória, Universidade Federal de Pernambuco, Vitória de Santo Antão, Brazil
| | - José Maurício Lucas Silva
- Centro Integrado de Tecnologias em Neurociência (CITENC), Centro Universitário Osman Lins (UNIFACOL), Vitória de Santo Antão, PE, Brazil.,Programa de Pós-graduação Multicêntrico em Ciências Fisiológicas, Centro Acadêmico de Vitória, Universidade Federal de Pernambuco, Vitória de Santo Antão, Brazil
| | - Ana Patrícia da Silva Souza
- Programa de Pós-graduação em Neuropsiquiatria e Ciências do Comportamento, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, Recife, PE, Brazil.,Centro Integrado de Tecnologias em Neurociência (CITENC), Centro Universitário Osman Lins (UNIFACOL), Vitória de Santo Antão, PE, Brazil
| | - Karollainy Gomes da Silva
- Programa de Pós-graduação em Neuropsiquiatria e Ciências do Comportamento, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, Recife, PE, Brazil.,Centro Integrado de Tecnologias em Neurociência (CITENC), Centro Universitário Osman Lins (UNIFACOL), Vitória de Santo Antão, PE, Brazil
| | - Matheus Santos de Sousa Fernandes
- Programa de Pós-graduação em Neuropsiquiatria e Ciências do Comportamento, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, Recife, PE, Brazil
| | | | | | - Cláudia Jacques Lagranha
- Programa de Pós-graduação em Neuropsiquiatria e Ciências do Comportamento, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, Recife, PE, Brazil.,Laboratorio de Bioquimica Geral, Molecular e do Exercicio-Universidade Federal de Pernambuco, Centro Acadêmico de Vitória (CAV)-UFPE, Vitória de Santo Antão, PE, Brazil
| |
Collapse
|
13
|
Bahrami A, Rezaeitalab F, Farahmand SK, Mazloum Khorasani Z, Arabi SM, Bahrami-Taghanaki H, Ferns GA, Ghayour-Mobarhan M. High-dose Vitamin D Supplementation and Improvement in Cognitive Abilities, Insomnia, and Daytime Sleepiness in Adolescent Girls. Basic Clin Neurosci 2021; 12:339-348. [PMID: 34917293 PMCID: PMC8666927 DOI: 10.32598/bcn.2021.1910.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 07/10/2019] [Accepted: 09/02/2020] [Indexed: 11/20/2022] Open
Abstract
Introduction: Vitamin D may affect the modulation of signaling pathways in the central nervous system. We aimed to evaluate the effect of high-dose vitamin D supplementation on neuropsychological functions in female adolescents. Methods: We studied the effects of 9 weeks of vitamin D supplementation (50000 IU vitamin D3 [cholecalciferol]/week) on cognitive abilities and sleep disorders in 940 adolescent girls. Results: Oral vitamin D supplementation improved cognitive abilities, including memory, inhibitory control, selective attention, decision making, planning, sustained attention, and cognitive flexibility in healthy adolescent girls (P<0.001). The prevalence of subjects with insomnia after intervention fell from 15.0% to 11.3%. Similar results were also found for the prevalence of sleepiness (15.6% reduced to 14.7%), or cases with both insomnia and sleepiness (8.0% reduced to 6.1%; P<0.05). Conclusion: High dose of vitamin D can improve cognitive abilities and alleviate insomnia and daytime sleepiness in adolescent girls. Further investigations are required on different population groups (age and gender) to determine the sustainability of these effects. The value of vitamin D therapy in other neurological disorders would also be of research interest.
Collapse
Affiliation(s)
- Afsane Bahrami
- Cellular and Molecular Research Center, School of Medicine, Birjand University of Medical Sciences, Bijand, Iran
| | - Fariborz Rezaeitalab
- Department of Neurology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Kazem Farahmand
- Department of Traditional Medicine, School of Persian and Complementary Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zahra Mazloum Khorasani
- Endocrine Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Mostafa Arabi
- Biochemistry of Nutrition Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamidreza Bahrami-Taghanaki
- Chinese and Complementary Medicine Research Center, School of Traditional and Complementary Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Gordon A Ferns
- Division of Medical Education, School of Brighton & Sussex Medical, University of Brighton and the University of Sussex, Falmer, Brighton, Sussex, UK
| | - Majid Ghayour-Mobarhan
- Metabolic Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| |
Collapse
|
14
|
Liu W, Zhou C, Wang Y, Yu H, Zhang X, Wang T, Wang L, Hao L, Qin Z, Xiao R. Vitamin D Deficiency Is Associated with Disrupted Cholesterol Homeostasis in Patients with Mild Cognitive Impairment. J Nutr 2021; 151:3865-3873. [PMID: 34510220 DOI: 10.1093/jn/nxab296] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 07/08/2021] [Accepted: 08/06/2021] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Several studies have reported that dietary and serum concentrations of vitamin D and cholesterol are correlated with mild cognitive impairment (MCI) and Alzheimer's disease (AD). However, little is known about whether 25 hydroxyvitamin D [25(OH)D], lipids, and oxysterols are related to cognitive function. OBJECTIVE This study sought to explore the relations between 25(OH)D, lipids, oxysterols, and cognitive function. METHODS In this study, about 209 MCI patients and 209 age- and gender-matched healthy controls were recruited from the Shanxi province of China (49.5% male; median [IQR] age: 63 [59-66] y). Serum concentrations of 25(OH)D, lipids, and oxysterols were measured using ultra-performance LC-MS. Cognitive performance was determined via comprehensive mental, verbal, and auditory cognitive tests. Dietary information was collected using a semiquantitative FFQ and 3 consecutive days of 24-h dietary recalls. Logistic regression analyses, Spearman's correlation, and partial correlation analyses were used to explore correlation between the variables. RESULTS Participants with vitamin D deficiency [serum 25(OH)D <20.0 ng/mL] were 3 times more likely to develop MCI compared to those with adequate vitamin D (≥30 ng/mL) concentrations. The AUC of 25(OH)D was 0.72 and the cut-off was 16.5 ng/mL (sensitivity: 50.3%, specificity: 84.4%). Serum 25(OH)D concentrations were negatively correlated with total cholesterol (TC) (r = -0.19, P = 0.02), LDL-cholesterol (r = -0.17, P = 0.04), and 24S,25-epoxycholesterol (24S,25-epoxy-CHO) (r = -0.21, P = 0.01). Conversely, the Montreal Cognitive Assessment (MoCA) (r = 0.185, P < 0.001) and symbol digit modalities test (SDMT) (r = 0.11, P = 0.03) scores were positively correlated with serum 25(OH)D concentrations. CONCLUSION The study identified significant differences in serum 25(OH)D concentrations between MCI patients and cognitive healthy controls, and there was a correlation between serum concentrations of 25(OH)D, lipids, and oxysterols and cognitive impairment among people. This study was registered at the Chinese Clinical Trial Registry as ChiCTR1900025452.
Collapse
Affiliation(s)
- Wen Liu
- School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China Capital Medical University, You An Men Wai, Beijing, China
| | - Cui Zhou
- School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China Capital Medical University, You An Men Wai, Beijing, China
| | - Yushan Wang
- School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China Capital Medical University, You An Men Wai, Beijing, China
| | - Huiyan Yu
- School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China Capital Medical University, You An Men Wai, Beijing, China
| | - Xiaona Zhang
- School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China Capital Medical University, You An Men Wai, Beijing, China
| | - Tao Wang
- School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China Capital Medical University, You An Men Wai, Beijing, China
| | - Lijing Wang
- School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China Capital Medical University, You An Men Wai, Beijing, China
| | - Ling Hao
- School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China Capital Medical University, You An Men Wai, Beijing, China
| | | | - Rong Xiao
- School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China Capital Medical University, You An Men Wai, Beijing, China
| |
Collapse
|
15
|
Beauchet O, Cooper-Brown LA, Allali G. Vitamin D Supplementation and Cognition in Adults: A Systematic Review of Randomized Controlled Trials. CNS Drugs 2021; 35:1249-1264. [PMID: 34806158 DOI: 10.1007/s40263-021-00876-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/27/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND The role of vitamin D supplementation in improving cognition and slowing the incidence of minor and major neurocognitive disorders is a matter of debate. To our knowledge, no systematic review of randomized controlled trials (RCTs) has examined this question in adults. OBJECTIVES The purpose of this systematic review is to synthesize the evidence regarding the effects of vitamin D supplementation on cognitive performance and neurocognitive disorders in adults. METHODS A systematic search of scientific articles in English or French was conducted. The MEDLINE (PubMed), EMBASE (Ovid, EMBASE), PsychINFO, and Cochrane Central databases were searched for records without any limit on publication date in May 2021. Inclusion criteria were (1) human participants, (2) RCT, (3) participant age ≥ 18, (4) vitamin D supplementation as the intervention, and (5) cognition (i.e., cognitive performance or cognitive status such as cognitively healthy or minor and major neurocognitive disorder) as the primary outcome. Two independent reviewers both assessed all eligible studies' full texts and the risk of bias arising from methodological issues using a standardized procedure. RESULTS Of the 2137 abstracts identified, 61 (2.9%) met screening inclusion criteria. After full text examination, 41 records (67.2%) were excluded. As a result, 20 RCTs (32.8%) were included in the systematic review. The review yielded mixed findings and, thus, failed to find evidence supporting cognitive benefits from vitamin D supplementation or suggesting a causal association between vitamin D and cognitive function. Half of the RCTs reported mixed results, one quarter negative results, and the last quarter positive effects for vitamin D supplementation on cognitive performance. The variability in serum 25-dihydroxyvitamin D concentration thresholds, the cognitive tests employed, the supplementation doses, and the samples' characteristics (i.e., ethnicity or number of participants) may explain these mixed findings. CONCLUSION This systematic review of RCTs does not support a role for vitamin D supplementation in enhancing cognition in adults.
Collapse
Affiliation(s)
- Olivier Beauchet
- Department of Medicine, University of Montreal, Montreal, QC, Canada. .,Research Center of the Geriatric University Institute of Montreal, Montreal, QC, Canada. .,Division of Geriatric Medicine, Department of Medicine, Sir Mortimer B. Davis Jewish General Hospital and Lady Davis Institute for Medical Research, McGill University, Montreal, QC, Canada. .,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore.
| | - Liam A Cooper-Brown
- Faculty of Medicine and Health Sciences, McGill University, Montreal, QC, Canada
| | - Gilles Allali
- Leenaards Memory Center, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| |
Collapse
|
16
|
Kang JH, Vyas CM, Okereke OI, Ogata S, Albert M, Lee IM, D'Agostino D, Buring JE, Cook NR, Grodstein F, Manson JE. Effect of vitamin D on cognitive decline: results from two ancillary studies of the VITAL randomized trial. Sci Rep 2021; 11:23253. [PMID: 34853363 PMCID: PMC8636504 DOI: 10.1038/s41598-021-02485-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 11/01/2021] [Indexed: 11/09/2022] Open
Abstract
Low vitamin D levels have been associated with cognitive decline; however, few randomized trials have been conducted. In a trial, we evaluated vitamin D3 supplementation on cognitive decline. We included participants aged 60+ years (mean[SD] = 70.9[5.8] years) free of cardiovascular disease and cancer in two substudies in the VITAL 2 × 2 randomized trial of vitamin D3 (2000 IU/day of cholecalciferol) and fish oil supplements: 3424 had cognitive assessments by phone (eight neuropsychologic tests; 2.8 years follow-up) and 794 had in-person assessments (nine tests; 2.0 years follow-up). The primary, pre-specified outcome was decline over two assessments in global composite score (average z-scores of all tests); substudy-specific results were meta-analyzed. The pooled mean difference in annual rate of decline (MD) for vitamin D3 versus placebo was 0.01 (95% CI - 0.01, 0.02; p = 0.39). We observed no interaction with baseline 25-hydroxyvitamin-D levels (p-interaction = 0.84) and a significant interaction with self-reported race (p-interaction = 0.01). Among Black participants (19%), those assigned vitamin D3 versus placebo had better cognitive maintenance (MD = 0.04, 95% CI 0.01, 0.08, similar to that observed for Black participants 1.2 years apart in age). Thus, vitamin D3 (2000 IU/day cholecalciferol) supplementation was not associated with cognitive decline over 2-3 years among community-dwelling older participants but may provide modest cognitive benefits in older Black adults, although these results need confirmation.Trial registration ClinicalTrials.gov; VITAL (NCT01169259), VITAL-DEP (NCT01696435) and VITAL-Cog (NCT01669915); the date the registration for the parent trial (NCT01169259) was submitted to the registry: 7/26/2010 and the date of first patient enrollment in either of the ancillary studies for cognitive function in a subset of eligible VITAL participants: 9/14/2011.
Collapse
Affiliation(s)
- Jae H Kang
- Channing Division of Network Medicine, Brigham and Women's Hospital/Harvard Medical School, 181 Longwood Ave, Boston, MA, 02115, USA.
| | - Chirag M Vyas
- Department of Psychiatry, Massachusetts General Hospital/Harvard Medical School, Boston, MA, USA
| | - Olivia I Okereke
- Channing Division of Network Medicine, Brigham and Women's Hospital/Harvard Medical School, 181 Longwood Ave, Boston, MA, 02115, USA
- Department of Psychiatry, Massachusetts General Hospital/Harvard Medical School, Boston, MA, USA
- Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - Soshiro Ogata
- Department of Preventive Medicine and Epidemiology, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Michelle Albert
- University of California at San Francisco School of Medicine, San Francisco, CA, USA
| | - I-Min Lee
- Harvard T. H. Chan School of Public Health, Boston, MA, USA
- Division of Preventive Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, MA, 02215, USA
| | - Denise D'Agostino
- Division of Preventive Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, MA, 02215, USA
| | - Julie E Buring
- Harvard T. H. Chan School of Public Health, Boston, MA, USA
- Division of Preventive Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, MA, 02215, USA
| | - Nancy R Cook
- Harvard T. H. Chan School of Public Health, Boston, MA, USA
- Division of Preventive Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, MA, 02215, USA
| | - Francine Grodstein
- Channing Division of Network Medicine, Brigham and Women's Hospital/Harvard Medical School, 181 Longwood Ave, Boston, MA, 02115, USA
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA
| | - JoAnn E Manson
- Harvard T. H. Chan School of Public Health, Boston, MA, USA
- Division of Preventive Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, MA, 02215, USA
| |
Collapse
|
17
|
Dominguez LJ, Veronese N, Vernuccio L, Catanese G, Inzerillo F, Salemi G, Barbagallo M. Nutrition, Physical Activity, and Other Lifestyle Factors in the Prevention of Cognitive Decline and Dementia. Nutrients 2021; 13:nu13114080. [PMID: 34836334 PMCID: PMC8624903 DOI: 10.3390/nu13114080] [Citation(s) in RCA: 96] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/25/2021] [Accepted: 10/27/2021] [Indexed: 02/07/2023] Open
Abstract
Multiple factors combined are currently recognized as contributors to cognitive decline. The main independent risk factor for cognitive impairment and dementia is advanced age followed by other determinants such as genetic, socioeconomic, and environmental factors, including nutrition and physical activity. In the next decades, a rise in dementia cases is expected due largely to the aging of the world population. There are no hitherto effective pharmaceutical therapies to treat age-associated cognitive impairment and dementia, which underscores the crucial role of prevention. A relationship among diet, physical activity, and other lifestyle factors with cognitive function has been intensively studied with mounting evidence supporting the role of these determinants in the development of cognitive decline and dementia, which is a chief cause of disability globally. Several dietary patterns, foods, and nutrients have been investigated in this regard, with some encouraging and other disappointing results. This review presents the current evidence for the effects of dietary patterns, dietary components, some supplements, physical activity, sleep patterns, and social engagement on the prevention or delay of the onset of age-related cognitive decline and dementia.
Collapse
Affiliation(s)
- Ligia J. Dominguez
- Geriatric Unit, Department of Medicine, University of Palermo, 90100 Palermo, Italy; (N.V.); (L.V.); (G.C.); (F.I.); (M.B.)
- Faculty of Medicine and Surgery, University of Enna “Kore”, 94100 Enna, Italy
- Correspondence: ; +39-0916554828
| | - Nicola Veronese
- Geriatric Unit, Department of Medicine, University of Palermo, 90100 Palermo, Italy; (N.V.); (L.V.); (G.C.); (F.I.); (M.B.)
| | - Laura Vernuccio
- Geriatric Unit, Department of Medicine, University of Palermo, 90100 Palermo, Italy; (N.V.); (L.V.); (G.C.); (F.I.); (M.B.)
| | - Giuseppina Catanese
- Geriatric Unit, Department of Medicine, University of Palermo, 90100 Palermo, Italy; (N.V.); (L.V.); (G.C.); (F.I.); (M.B.)
| | - Flora Inzerillo
- Geriatric Unit, Department of Medicine, University of Palermo, 90100 Palermo, Italy; (N.V.); (L.V.); (G.C.); (F.I.); (M.B.)
| | - Giuseppe Salemi
- Department of Biomedicine, Neuroscience, and Advanced Diagnostics, University of Palermo, 90100 Palermo, Italy;
- UOC of Neurology, University Hospital “Paolo Giaccone”, 90100 Palermo, Italy
| | - Mario Barbagallo
- Geriatric Unit, Department of Medicine, University of Palermo, 90100 Palermo, Italy; (N.V.); (L.V.); (G.C.); (F.I.); (M.B.)
| |
Collapse
|
18
|
Du Y, Liang F, Zhang L, Liu J, Dou H. Vitamin D Supplement for Prevention of Alzheimer's Disease: A Systematic Review and Meta-Analysis. Am J Ther 2021; 28:e638-48. [DOI: 10.1097/mjt.0000000000001302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
19
|
Yang T, Wang H, Xiong Y, Chen C, Duan K, Jia J, Ma F. Vitamin D Supplementation Improves Cognitive Function Through Reducing Oxidative Stress Regulated by Telomere Length in Older Adults with Mild Cognitive Impairment: A 12-Month Randomized Controlled Trial. J Alzheimers Dis 2021; 78:1509-1518. [PMID: 33164936 DOI: 10.3233/jad-200926] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Cognitive decline in older adults is a serious public health problem today. Association between vitamin D supplementation and cognition remains controversial. OBJECTIVE To determine whether a 12-month vitamin D supplementation improves cognitive function in elderly subjects with mild cognitive impairment (MCI), and whether it is mediated through the mechanism in which telomere length (TL) regulate oxidative stress. METHODS This was a double-blind, randomized, placebo-controlled trial in Tianjin, China. Participants were all native Chinese speakers aged 65 years and older with MCI. 183 subjects were randomized to an intervention group (vitamin D 800 IU/day, n = 93) or a placebo group (the matching starch granules, n = 90), and followed up for 12 months. Tests of cognitive function and mechanism-related biomarkers were evaluated at baseline, 6 months, and 12 months. RESULTS Repeated-measures ANOVA showed substantial improvements in the full scale intelligence quotient (FSIQ), information, digit span, vocabulary, block design, and picture arrangement scores in the vitamin D group over the placebo group (p < 0.001). Leukocyte TL was significantly higher, while serum 8-OXO-dG, OGG1mRNA, and P16INK4amRNA revealed greater decreases in the vitamin D group over the placebo group (p < 0.001). According to mixed-model repeated-measures ANOVA analysis, vitamin D group showed a significant enhancement in the FSIQ score for 12 months compared with the control (estimate value = 5.132, p < 0.001). CONCLUSION Vitamin D supplementation for 12 months appears to improve cognitive function through reducing oxidative stress regulated by increased TL in order adults with MCI. Vitamin D may be a promising public health strategy to prevent cognitive decline.
Collapse
Affiliation(s)
- Tong Yang
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China.,Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on environment, Nutrition and Public Health, Tianjin, China
| | - Hualou Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China.,Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on environment, Nutrition and Public Health, Tianjin, China
| | - Ying Xiong
- Department of Community Service, Wangdingdi Hospital of Tianjin Nankai District, Tianjin, China
| | - Chong Chen
- Department of Clinical Laboratory, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin, China.,Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.,Tianjin's Clinical Research Center for Cancer, Tianjin, China.,National Human Genetic Resources Sharing Service Platform, Tianjin, China
| | - Keran Duan
- Biobank, Tianjin First Center Hospital, Tianjin, China
| | - Jingya Jia
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China.,Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on environment, Nutrition and Public Health, Tianjin, China
| | - Fei Ma
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China.,Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on environment, Nutrition and Public Health, Tianjin, China
| |
Collapse
|
20
|
Bivona G, Lo Sasso B, Gambino CM, Giglio RV, Scazzone C, Agnello L, Ciaccio M. The Role of Vitamin D as a Biomarker in Alzheimer's Disease. Brain Sci 2021; 11:brainsci11030334. [PMID: 33800891 PMCID: PMC8000099 DOI: 10.3390/brainsci11030334] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/02/2021] [Accepted: 03/02/2021] [Indexed: 01/01/2023] Open
Abstract
Vitamin D and cognition is a popular association, which led to a remarkable body of literature data in the past 50 years. The brain can synthesize, catabolize, and receive Vitamin D, which has been proved to regulate many cellular processes in neurons and microglia. Vitamin D helps synaptic plasticity and neurotransmission in dopaminergic neural circuits and exerts anti-inflammatory and neuroprotective activities within the brain by reducing the synthesis of pro-inflammatory cytokines and the oxidative stress load. Further, Vitamin D action in the brain has been related to the clearance of amyloid plaques, which represent a feature of Alzheimer Disease (AD), by the immune cell. Based on these considerations, many studies have investigated the role of circulating Vitamin D levels in patients affected by a cognitive decline to assess Vitamin D’s eventual role as a biomarker or a risk factor in AD. An association between low Vitamin D levels and the onset and progression of AD has been reported, and some interventional studies to evaluate the role of Vitamin D in preventing AD onset have been performed. However, many pitfalls affected the studies available, including substantial discrepancies in the methods used and the lack of standardized data. Despite many studies, it remains unclear whether Vitamin D can have a role in cognitive decline and AD. This narrative review aims to answer two key questions: whether Vitamin D can be used as a reliable tool for diagnosing, predicting prognosis and response to treatment in AD patients, and whether it is a modifiable risk factor for preventing AD onset.
Collapse
Affiliation(s)
- Giulia Bivona
- Institute of Clinical Biochemistry, Clinical Molecular Medicine and Laboratory Medicine, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, 90127 Palermo, Italy; (G.B.); (B.L.S.); (C.M.G.); (R.V.G.); (C.S.); (L.A.)
| | - Bruna Lo Sasso
- Institute of Clinical Biochemistry, Clinical Molecular Medicine and Laboratory Medicine, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, 90127 Palermo, Italy; (G.B.); (B.L.S.); (C.M.G.); (R.V.G.); (C.S.); (L.A.)
- Department of Laboratory Medicine, AOUP “P. Giaccone”, 90127 Palermo, Italy
| | - Caterina Maria Gambino
- Institute of Clinical Biochemistry, Clinical Molecular Medicine and Laboratory Medicine, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, 90127 Palermo, Italy; (G.B.); (B.L.S.); (C.M.G.); (R.V.G.); (C.S.); (L.A.)
| | - Rosaria Vincenza Giglio
- Institute of Clinical Biochemistry, Clinical Molecular Medicine and Laboratory Medicine, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, 90127 Palermo, Italy; (G.B.); (B.L.S.); (C.M.G.); (R.V.G.); (C.S.); (L.A.)
| | - Concetta Scazzone
- Institute of Clinical Biochemistry, Clinical Molecular Medicine and Laboratory Medicine, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, 90127 Palermo, Italy; (G.B.); (B.L.S.); (C.M.G.); (R.V.G.); (C.S.); (L.A.)
| | - Luisa Agnello
- Institute of Clinical Biochemistry, Clinical Molecular Medicine and Laboratory Medicine, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, 90127 Palermo, Italy; (G.B.); (B.L.S.); (C.M.G.); (R.V.G.); (C.S.); (L.A.)
| | - Marcello Ciaccio
- Institute of Clinical Biochemistry, Clinical Molecular Medicine and Laboratory Medicine, Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, 90127 Palermo, Italy; (G.B.); (B.L.S.); (C.M.G.); (R.V.G.); (C.S.); (L.A.)
- Department of Laboratory Medicine, AOUP “P. Giaccone”, 90127 Palermo, Italy
- Correspondence:
| |
Collapse
|
21
|
Awadh AA, Hilleman DE, Knezevich E, Malesker MA, Gallagher JC. Vitamin D supplements: The pharmacists' perspective. J Am Pharm Assoc (2003) 2021; 61:e191-201. [PMID: 33674204 DOI: 10.1016/j.japh.2021.02.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/04/2021] [Accepted: 02/04/2021] [Indexed: 12/20/2022]
Abstract
OBJECTIVE The purpose of this narrative review was to provide guidance for pharmacists concerning vitamin D supplementation. METHODS Relevant studies were identified in a search of MEDLINE/PubMed, EBSCOhost, and Google Scholar from January 1966 to September 2020 using the search terms vitamin D, vitamin D2, vitamin D3, calcitriol, and vitamin D deficiency. Abstracts were reviewed for relevance and, if relevant, full-text articles were retrieved and reviewed. References were checked, and citation searches using identified studies were conducted. The literature search included English-language studies involving administration of vitamin D monotherapy compared with placebo. RESULTS Serum 25-hydroxyvitamin D levels of less than 12 ng/mL indicate a vitamin D deficiency. The Institute of Medicine recommends a daily intake of 600 IU of vitamin D in individuals aged up to 70 years and 800 IU in those aged above 70 years. Vitamin D is labeled for rickets, osetomalacia, hypophosphatemia (familial or secondary), renal osteodystrophy, and corticosteroid-induced osteoporosis. When used for these indications, vitamin D should be prescribed with appropriate monitoring by a qualified health care practitioner. There is evidence for vitamin D supplementation in individuals aged 75 years or older and in those with problems associated with mobility, gait, or balance. There is insufficient evidence to support vitamin D supplementation in the prevention of cardiovascular disease, cancer, asthma, chronic obstructive pulmonary disease exacerbations, new-onset type 2 diabetes, infectious lung diseases, cognitive dysfunction, Alzheimer disease, and depression, or in prenatal use. CONCLUSION Pharmacists can provide evidence-based recommendations concerning the indications, dosing, monitoring, and adverse effects of vitamin D supplements.
Collapse
|
22
|
Peeri NC, Egan KM, Chai W, Tao MH. Association of magnesium intake and vitamin D status with cognitive function in older adults: an analysis of US National Health and Nutrition Examination Survey (NHANES) 2011 to 2014. Eur J Nutr 2020; 60:465-474. [PMID: 32388734 PMCID: PMC7649128 DOI: 10.1007/s00394-020-02267-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 04/28/2020] [Indexed: 12/13/2022]
Abstract
PURPOSE Reduced cognitive function associated with aging has gained increasing attention as the US population ages. Magnesium plays a critical role in vitamin D biosynthesis and metabolism; and deficiencies in magnesium and vitamin D show associations with poor cognition. However, no study has examined their interaction. This study aimed to evaluate the associations of magnesium intake and serum 25-hydroxyvitamin D (25(OH)D) concentrations, indicating vitamin D status, with cognition, and interaction between these nutrients in older adults. METHODS Based on the National Health and Nutrition Survey (NHANES) 2011-2014, the study included 2466 participants aged ≥ 60 years who completed the Digit Symbol Substitution Test (DSST) and had data available on serum 25(OH)D and magnesium intake. Cognitive impairment was defined as a DSST score lower than the lowest quartile. Serum 25(OH)D concentrations were measured by HPLC-tandem mass spectrometry. RESULTS Higher total magnesium intake was independently associated with higher DSST scores (highest quartile vs lowest: β = 4.34, 95% CI 1.14-7.54). The association of total magnesium intake with high DSST score was primarily observed among women, non-Hispanic whites, physically active participants and those with sufficient vitamin D status, although the interactions were not significant. The odds of cognitive impairment was reduced with increasing intake of total magnesium (p trend < 0.01) and higher level of serum 25(OH)D (p trend = 0.05). CONCLUSIONS Findings suggest that high magnesium intake alone may improve cognitive function in older adults, and the association may be stronger among subjects with sufficient vitamin D status. Further studies are needed to confirm these findings.
Collapse
Affiliation(s)
- Noah C Peeri
- Department of Biostatistics and Epidemiology, University of North Texas Health Science Center, Fort Worth, TX, 76107, United States
| | - Kathleen M Egan
- Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Weiwen Chai
- Department of Nutrition and Health Sciences, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | - Meng-Hua Tao
- Department of Biostatistics and Epidemiology, University of North Texas Health Science Center, Fort Worth, TX, 76107, United States.
| |
Collapse
|
23
|
Suh SW, Kim HS, Han JH, Bae JB, Oh DJ, Han JW, Kim KW. Efficacy of Vitamins on Cognitive Function of Non-Demented People: A Systematic Review and Meta-Analysis. Nutrients 2020; 12:E1168. [PMID: 32331312 PMCID: PMC7231132 DOI: 10.3390/nu12041168] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/12/2020] [Accepted: 04/14/2020] [Indexed: 12/19/2022] Open
Abstract
Previous evidence has suggested that vitamins might be beneficial for cognition. This systematic review aimed to investigate the efficacy of B vitamins, antioxidant vitamins, and vitamin D on the cognitive function of non-demented middle-aged or older people. Randomized or quasi-randomized controlled trials of individuals aged 40 years or older were included. PubMed/MEDLINE, EMBASE, CINAHL, PsycINFO, Cochrane Library databases, and other grey literature sources were searched up to November 2019. Their methodological quality was evaluated using the Cochrane Risk of Bias tool. Twenty-three studies on B vitamins (n = 22-1053; comprising folate, B6, and B12), nine on antioxidant vitamins (n = 185-20,469), and six on vitamin D (n = 55-4122) were included. Taking B vitamins for over 3 months was beneficial for global cognition (standardized mean difference (SMD) -0.18, 95% CI -0.30 to -0.06) and episodic memory (SMD -0.09, 95% CI -0.15 to -0.04). However, antioxidant vitamins (SMD -0.02, 95% CI -0.08 to 0.03) and vitamin D (SMD -0.06, 95% CI -0.36 to 0.23) were not. Antioxidant vitamins were beneficial for global cognition in sensitivity analyses using final measurement data as mean difference estimates (SMD, -0.04, 95% CI -0.08 to -0.01). Taking B vitamins and possibly antioxidant vitamins may be beneficial for the cognitive function of non-demented people.
Collapse
Affiliation(s)
- Seung Wan Suh
- Department of Psychiatry, College of Medicine, Hallym University, Kangdong Sacred Heart Hospital, Seoul 05355, Korea
| | - Hye Sung Kim
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam 13620, Korea
| | - Ji Hyun Han
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam 13620, Korea
| | - Jong Bin Bae
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam 13620, Korea
| | - Dae Jong Oh
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam 13620, Korea
| | - Ji Won Han
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam 13620, Korea
| | - Ki Woong Kim
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam 13620, Korea
- Department of Psychiatry, College of Medicine, Seoul National University, Seoul 03080, Korea
- Department of Brain and Cognitive Sciences, College of Natural Sciences, Seoul National University, Seoul 08826, Korea
| |
Collapse
|