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Baba SM, Shafi T, Rasool R, Hameed A, Shafi S, Ahmad SF. Molecular investigation of vitamin D receptor (VDR) genetic variants and their impact on VDR mRNA and serum vitamin D levels in allergic rhinitis in an Indian population: A case-control study. Int J Immunogenet 2024. [PMID: 38809236 DOI: 10.1111/iji.12679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/28/2024] [Accepted: 05/08/2024] [Indexed: 05/30/2024]
Abstract
Vitamin D deficiency is widespread and poses a significant health concern, as emerging research links it to allergic diseases owing to its immunomodulatory functions. The optimal functioning of vitamin D and its activation depend on its nuclear receptor, vitamin D receptor (VDR). Genetic variants of VDR have been explored as potential factors in autoimmune and allergic diseases, with limited studies on their association with allergic rhinitis (AR). The present investigation aims to analyse the role of three VDR genetic variants - TaqI, FokI and BsmI - in AR susceptibility and their impact on VDR mRNA and serum vitamin D levels. A total of 550 subjects, consisting of 250 AR cases and 300 age- and gender-matched controls, underwent genotyping by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). VDR mRNA and vitamin D levels were determined by quantitative real-time PCR and chemiluminescence, respectively. Although TaqI did not exhibit significant differences, FokI demonstrated a noteworthy association with AR, particularly with the CC genotype (odds ratio [OR]: 3.34; confidence interval [CI]: 1.79-6.23). Similarly, BsmI revealed an increased risk for AR, with the GA + AA genotypes showing a 2.2-fold elevated risk (OR: 2.20; CI: 1.53-3.16). VDR mRNA expression was threefold lower in AR patients (p < .0001), accompanied by reduced serum vitamin D levels (p < .0001). In addition, CC (p = .01) and AA (p = .02) genotypes of FokI and BsmI were associated with reduced VDR mRNA levels, whereas TaqI showed no such association. Similarly, heterozygous genotypes of TaqI and FokI, as well as homozygous AA of BsmI, correlated with lower serum vitamin D levels (p < .001). This study emphasizes the intricate relationship among VDR genetic variations, altered VDR activity, immune modulation and vitamin D metabolism in AR. Further research involving diverse populations is crucial for confirming and generalizing these findings, paving the way for personalized therapeutic interventions in vitamin D-related disorders.
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Affiliation(s)
- Shahid M Baba
- Centre for Vocational Studies, Islamic University of Science & Technology, Awantipora, Pulwama, Jammu and Kashmir, India
| | - Tabasum Shafi
- Department of Immunology & Molecular Medicine, SKIMS, Srinagar, Jammu and Kashmir, India
| | - Roohi Rasool
- Department of Immunology & Molecular Medicine, SKIMS, Srinagar, Jammu and Kashmir, India
| | - Afaq Hameed
- Department of Immunology & Molecular Medicine, SKIMS, Srinagar, Jammu and Kashmir, India
| | - Saba Shafi
- Department of Clinical Biochemistry, University of Kashmir, Srinagar, Jammu and Kashmir, India
| | - Sheikh F Ahmad
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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2
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Fang A, Zhao Y, Yang P, Zhang X, Giovannucci EL. Vitamin D and human health: evidence from Mendelian randomization studies. Eur J Epidemiol 2024; 39:467-490. [PMID: 38214845 DOI: 10.1007/s10654-023-01075-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 10/30/2023] [Indexed: 01/13/2024]
Abstract
We summarized the current evidence on vitamin D and major health outcomes from Mendelian randomization (MR) studies. PubMed and Embase were searched for original MR studies on vitamin D in relation to any health outcome from inception to September 1, 2022. Nonlinear MR findings were excluded due to concerns about the validity of the statistical methods used. A meta-analysis was preformed to synthesize study-specific estimates after excluding overlapping samples, where applicable. The methodological quality of the included studies was evaluated according to the STROBE-MR checklist. A total of 133 MR publications were eligible for inclusion in the analyses. The causal association between vitamin D status and 275 individual outcomes was examined. Linear MR analyses showed genetically high 25-hydroxyvitamin D (25(OH)D) concentrations were associated with reduced risk of multiple sclerosis incidence and relapse, non-infectious uveitis and scleritis, psoriasis, femur fracture, leg fracture, amyotrophic lateral sclerosis, anorexia nervosa, delirium, heart failure, ovarian cancer, non-alcoholic fatty liver disease, dyslipidemia, and bacterial pneumonia, but increased risk of Behçet's disease, Graves' disease, kidney stone disease, fracture of radium/ulna, basal cell carcinoma, and overall cataracts. Stratified analyses showed that the inverse association between genetically predisposed 25(OH)D concentrations and multiple sclerosis risk was significant and consistent regardless of the genetic instruments GIs selected. However, the associations with most of the other outcomes were only pronounced when using genetic variants not limited to those in the vitamin D pathway as GIs. The methodological quality of the included MR studies was substantially heterogeneous. Current evidence from linear MR studies strongly supports a causal role of vitamin D in the development of multiple sclerosis. Suggestive support for a number of other health conditions could help prioritize conditions where vitamin D may be beneficial or harmful.
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Affiliation(s)
- Aiping Fang
- Department of Nutrition, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou, China
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, 02115, USA
| | - Yue Zhao
- Department of Nutrition, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou, China
| | - Ping Yang
- School of Nursing, Peking University, Beijing, China
- School of Nursing, Johns Hopkins University, Baltimore, MD, USA
| | - Xuehong Zhang
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, 02115, USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Edward L Giovannucci
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, 02115, USA.
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
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Adrizain R, Nagari MV, Sukandar H, Berbudi A, Setiabudi D, Setiabudiawan B. Surveillance of Soil-Transmitted Helminth Infection in Preschool Child Population: Do Changes in Behavior and Immunological Responses Affect Prevalence? Trop Med Infect Dis 2024; 9:33. [PMID: 38393122 PMCID: PMC10892740 DOI: 10.3390/tropicalmed9020033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 01/23/2024] [Accepted: 01/25/2024] [Indexed: 02/25/2024] Open
Abstract
Soil-transmitted helminths (STHs) persist as a significant global public health issue among neglected tropical diseases (NTDs), particularly in children. STH infection can induce immune responses that affect the course of the disease; if treatment fails, chronic infection can lead to stunting, especially among children aged 24-59 months, which is a vulnerable period for growth and development. We conducted a correlational, cross-sectional data collection study to evaluate the characteristics and association of 25(OH)D, interleukin-5 (IL-5), and interleukin-13 (IL-13) with the prevalence of STH infection in children aged 24-59 months in Bandung District, Indonesia, in October 2019-January 2023. We recruited 694 subjects (401 stunted and 293 normal-height children). The prevalence of STH infection among the stunted and normal-height groups was 5.7% (95% CI: 3.85-8.46%) and 3.4% (95% CI; 1.86-6.17%) (p = 0.156), respectively. The probability of the prevalence of STH infection in children with levels of 25(OH)D, IL-5, and IL-13 below the cut-off point was 6,93 to 16.71 times higher. We found a relationship between IL-5, IL-13, and environmental factors and the prevalence of STH infection in stunted children.
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Affiliation(s)
- Riyadi Adrizain
- Department of Child Health, Faculty of Medicine, Universitas Padjadjaran, Bandung 40161, Indonesia (B.S.)
| | | | - Hadyana Sukandar
- Department of Public Health, Faculty of Medicine, Universitas Padjadjaran, Bandung 40161, Indonesia
| | - Afiat Berbudi
- Department of Biomedical Science, Faculty of Medicine, Universitas Padjadjaran, Bandung 40161, Indonesia;
| | - Djatnika Setiabudi
- Department of Child Health, Faculty of Medicine, Universitas Padjadjaran, Bandung 40161, Indonesia (B.S.)
| | - Budi Setiabudiawan
- Department of Child Health, Faculty of Medicine, Universitas Padjadjaran, Bandung 40161, Indonesia (B.S.)
- Faculty of Medicine, President University, Bekasi 17550, Indonesia
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Carrascosa-Carrillo JM, Aterido A, Li T, Guillén Y, Martinez S, Marsal S, Julià A. Toward Precision Medicine in Atopic Dermatitis Using Molecular-Based Approaches. ACTAS DERMO-SIFILIOGRAFICAS 2024; 115:66-75. [PMID: 37652096 DOI: 10.1016/j.ad.2023.08.003] [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: 08/10/2023] [Accepted: 08/15/2023] [Indexed: 09/02/2023] Open
Abstract
Atopic dermatitis is the most common chronic inflammatory skin disorder, affecting up to 20% of children and 10% of adults in developed countries. The pathophysiology of atopic dermatitis is complex and involves a strong genetic predisposition and T-cell driven inflammation. Although our understanding of the pathology and drivers of this disease has improved in recent years, there are still knowledge gaps in the immune pathways involved. Therefore, advances in new omics technologies in atopic dermatitis will play a key role in understanding the pathogenesis of this burden disease and could develop preventive strategies and personalized treatment strategies. In this review, we discuss the latest developments in genetics, transcriptomics, epigenomics, proteomics, and metagenomics and understand how integrating multiple omics datasets will identify potential biomarkers and uncover nets of associations between several molecular levels.
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Affiliation(s)
- J M Carrascosa-Carrillo
- Dermatology Department, Hospital Germans Trias i Pujol, UAB, IGTP, Badalona, Barcelona, Spain
| | - A Aterido
- IMIDomics, Inc., Barcelona, Spain; Rheumatology Research Group, Vall Hebron Research Institute, Barcelona, Spain
| | - T Li
- IMIDomics, Inc., Barcelona, Spain
| | | | | | - S Marsal
- IMIDomics, Inc., Barcelona, Spain; Rheumatology Research Group, Vall Hebron Research Institute, Barcelona, Spain.
| | - A Julià
- IMIDomics, Inc., Barcelona, Spain; Rheumatology Research Group, Vall Hebron Research Institute, Barcelona, Spain
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Carrascosa-Carrillo JM, Aterido A, Li T, Guillén Y, Martinez S, Marsal S, Julià A. Toward Precision Medicine in Atopic Dermatitis Using Molecular-Based Approaches. ACTAS DERMO-SIFILIOGRAFICAS 2024; 115:T66-T75. [PMID: 37923065 DOI: 10.1016/j.ad.2023.10.032] [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: 08/10/2023] [Accepted: 08/15/2023] [Indexed: 11/07/2023] Open
Abstract
Atopic dermatitis is the most common chronic inflammatory skin disorder, affecting up to 20% of children and 10% of adults in developed countries. The pathophysiology of atopic dermatitis is complex and involves a strong genetic predisposition and T-cell driven inflammation. Although our understanding of the pathology and drivers of this disease has improved in recent years, there are still knowledge gaps in the immune pathways involved. Therefore, advances in new omics technologies in atopic dermatitis will play a key role in understanding the pathogenesis of this burden disease and could develop preventive strategies and personalized treatment strategies. In this review, we discuss the latest developments in genetics, transcriptomics, epigenomics, proteomics, and metagenomics and understand how integrating multiple omics datasets will identify potential biomarkers and uncover nets of associations between several molecular levels.
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Affiliation(s)
- J M Carrascosa-Carrillo
- Dermatology Department, Hospital Germans Trias i Pujol, UAB, IGTP, Badalona, Barcelona, España
| | - A Aterido
- IMIDomics, Inc., Barcelona, España; Rheumatology Research Group, Vall Hebron Research Institute, Barcelona, España
| | - T Li
- IMIDomics, Inc., Barcelona, España
| | | | | | - S Marsal
- IMIDomics, Inc., Barcelona, España; Rheumatology Research Group, Vall Hebron Research Institute, Barcelona, España.
| | - A Julià
- IMIDomics, Inc., Barcelona, España; Rheumatology Research Group, Vall Hebron Research Institute, Barcelona, España
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Sobczyk MK, Zheng J, Davey Smith G, Gaunt TR. Systematic comparison of Mendelian randomisation studies and randomised controlled trials using electronic databases. BMJ Open 2023; 13:e072087. [PMID: 37751957 PMCID: PMC10533809 DOI: 10.1136/bmjopen-2023-072087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 08/21/2023] [Indexed: 09/30/2023] Open
Abstract
OBJECTIVE To scope the potential for (semi)-automated triangulation of Mendelian randomisation (MR) and randomised controlled trials (RCTs) evidence since the two methods have distinct assumptions that make comparisons between their results invaluable. METHODS We mined ClinicalTrials.Gov, PubMed and EpigraphDB databases and carried out a series of 26 manual literature comparisons among 54 MR and 77 RCT publications. RESULTS We found that only 13% of completed RCTs identified in ClinicalTrials.Gov submitted their results to the database. Similarly low coverage was revealed for Semantic Medline (SemMedDB) semantic triples derived from MR and RCT publications -36% and 12%, respectively. Among intervention types that can be mimicked by MR, only trials of pharmaceutical interventions could be automatically matched to MR results due to insufficient annotation with Medical Subject Headings ontology. A manual survey of the literature highlighted the potential for triangulation across a number of exposure/outcome pairs if these challenges can be addressed. CONCLUSIONS We conclude that careful triangulation of MR with RCT evidence should involve consideration of similarity of phenotypes across study designs, intervention intensity and duration, study population demography and health status, comparator group, intervention goal and quality of evidence.
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Affiliation(s)
- Maria K Sobczyk
- MRC Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
| | - Jie Zheng
- MRC Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
- Department of Endocrine and Metabolic Diseases, Shanghai Institute of Endocrine and Metabolic Diseases, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
- Shanghai National Clinical Research Center for Metabolic Diseases, Key Laboratory for Endocrine and Metabolic Diseases of the National Health Commission of the PR China, Shanghai Key Laboratory for Endocrine Tumor, State Key Laboratory of Medical Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - George Davey Smith
- MRC Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
| | - Tom R Gaunt
- MRC Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
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Guo K, Diemer EW, Labrecque JA, Swanson SA. Falsification of the instrumental variable conditions in Mendelian randomization studies in the UK Biobank. Eur J Epidemiol 2023; 38:921-927. [PMID: 37253997 PMCID: PMC10501946 DOI: 10.1007/s10654-023-01003-6] [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: 10/12/2021] [Accepted: 04/03/2023] [Indexed: 06/01/2023]
Abstract
Mendelian randomization (MR) is an increasingly popular approach to estimating causal effects. Although the assumptions underlying MR cannot be verified, they imply certain constraints, the instrumental inequalities, which can be used to falsify the MR conditions. However, the instrumental inequalities are rarely applied in MR. We aimed to explore whether the instrumental inequalities could detect violations of the MR conditions in case studies analyzing the effect of commonly studied exposures on coronary artery disease risk.Using 1077 single nucleotide polymorphisms (SNPs), we applied the instrumental inequalities to MR models for the effects of vitamin D concentration, alcohol consumption, C-reactive protein (CRP), triglycerides, high-density lipoprotein (HDL) cholesterol, and low-density lipoprotein (LDL) cholesterol on coronary artery disease in the UK Biobank. For their relevant exposure, we applied the instrumental inequalities to MR models proposing each SNP as an instrument individually, and to MR models proposing unweighted allele scores as an instrument. We did not identify any violations of the MR assumptions when proposing each SNP as an instrument individually. When proposing allele scores as instruments, we detected violations of the MR assumptions for 5 of 6 exposures.Within our setting, this suggests the instrumental inequalities can be useful for identifying violations of the MR conditions when proposing multiple SNPs as instruments, but may be less useful in determining which SNPs are not instruments. This work demonstrates how incorporating the instrumental inequalities into MR analyses can help researchers to identify and mitigate potential bias.
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Affiliation(s)
- Kelly Guo
- Department of Epidemiology, Erasmus MC, Rotterdam, the Netherlands.
| | - Elizabeth W Diemer
- Department of Child and Adolescent Psychiatry, Erasmus MC, Rotterdam, the Netherlands
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, USA
- CAUSALab, Harvard T.H. Chan School of Public Health, Boston, USA
| | | | - Sonja A Swanson
- Department of Epidemiology, Erasmus MC, Rotterdam, the Netherlands
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, USA
- CAUSALab, Harvard T.H. Chan School of Public Health, Boston, USA
- Department of Epidemiology, University of Pittsburgh School of Public Health, Pittsburgh, USA
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8
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Antó JM, Pearce N, Douwes J, Garcia-Aymerich J, Pembrey L, Richiardi L, Sunyer J. Why has epidemiology not (yet) succeeded in identifying the origin of the asthma epidemic? Int J Epidemiol 2023; 52:974-983. [PMID: 37004248 PMCID: PMC10396414 DOI: 10.1093/ije/dyad035] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 03/15/2023] [Indexed: 04/04/2023] Open
Affiliation(s)
- Josep M Antó
- ISGlobal, Barcelona Institute for Global Health, Barcelona, Spain
- Hospital del Mar Medical Research Institute, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
| | - Neil Pearce
- Department of Non-communicable Disease Epidemiology and Medical Statistics, London School of Hygiene and Tropical Medicine, London, UK
| | - Jeroen Douwes
- Research Centre for Hauora and Health, Massey University, Wellington, New Zealand
| | - Judith Garcia-Aymerich
- ISGlobal, Barcelona Institute for Global Health, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
| | - Lucy Pembrey
- Department of Medical Statistics, London School of Hygiene and Tropical Medicine, London, UK
| | - Lorenzo Richiardi
- Cancer Epidemiology Unit, Department of Medical Sciences, University of Turin, and CPO-Piemonte, Torino, Italy
| | - Jordi Sunyer
- ISGlobal, Barcelona Institute for Global Health, Barcelona, Spain
- Hospital del Mar Medical Research Institute, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
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Illidi CR, Romer LM, Johnson MA, Williams NC, Rossiter HB, Casaburi R, Tiller NB. Distinguishing science from pseudoscience in commercial respiratory interventions: an evidence-based guide for health and exercise professionals. Eur J Appl Physiol 2023; 123:1599-1625. [PMID: 36917254 PMCID: PMC10013266 DOI: 10.1007/s00421-023-05166-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 02/19/2023] [Indexed: 03/16/2023]
Abstract
Respiratory function has become a global health priority. Not only is chronic respiratory disease a leading cause of worldwide morbidity and mortality, but the COVID-19 pandemic has heightened attention on respiratory health and the means of enhancing it. Subsequently, and inevitably, the respiratory system has become a target of the multi-trillion-dollar health and wellness industry. Numerous commercial, respiratory-related interventions are now coupled to therapeutic and/or ergogenic claims that vary in their plausibility: from the reasonable to the absurd. Moreover, legitimate and illegitimate claims are often conflated in a wellness space that lacks regulation. The abundance of interventions, the range of potential therapeutic targets in the respiratory system, and the wealth of research that varies in quality, all confound the ability for health and exercise professionals to make informed risk-to-benefit assessments with their patients and clients. This review focuses on numerous commercial interventions that purport to improve respiratory health, including nasal dilators, nasal breathing, and systematized breathing interventions (such as pursed-lips breathing), respiratory muscle training, canned oxygen, nutritional supplements, and inhaled L-menthol. For each intervention we describe the premise, examine the plausibility, and systematically contrast commercial claims against the published literature. The overarching aim is to assist health and exercise professionals to distinguish science from pseudoscience and make pragmatic and safe risk-to-benefit decisions.
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Affiliation(s)
- Camilla R Illidi
- Clinical Exercise and Respiratory Physiology Laboratory, Department of Kinesiology and Physical Education, Faculty of Education, McGill University, Montréal, QC, Canada
| | - Lee M Romer
- Division of Sport, Health and Exercise Sciences, College of Health, Medicine and Life Sciences, Brunel University London, Uxbridge, UK
| | - Michael A Johnson
- Exercise and Health Research Group, Sport, Health and Performance Enhancement (SHAPE) Research Centre, School of Science and Technology, Nottingham Trent University, Nottingham, Nottinghamshire, UK
| | - Neil C Williams
- Exercise and Health Research Group, Sport, Health and Performance Enhancement (SHAPE) Research Centre, School of Science and Technology, Nottingham Trent University, Nottingham, Nottinghamshire, UK
| | - Harry B Rossiter
- Institute of Respiratory Medicine and Exercise Physiology, Division of Respiratory and Critical Care Physiology and Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, 1124 W. Carson Street, CDCRC Building, Torrance, CA, 90502, USA
| | - Richard Casaburi
- Institute of Respiratory Medicine and Exercise Physiology, Division of Respiratory and Critical Care Physiology and Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, 1124 W. Carson Street, CDCRC Building, Torrance, CA, 90502, USA
| | - Nicholas B Tiller
- Institute of Respiratory Medicine and Exercise Physiology, Division of Respiratory and Critical Care Physiology and Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, 1124 W. Carson Street, CDCRC Building, Torrance, CA, 90502, USA.
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Bastyte D, Tamasauskiene L, Golubickaite I, Ugenskiene R, Sitkauskiene B. Vitamin D receptor and vitamin D binding protein gene polymorphisms in patients with asthma: a pilot study. BMC Pulm Med 2023; 23:245. [PMID: 37407930 PMCID: PMC10324267 DOI: 10.1186/s12890-023-02531-3] [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: 10/13/2022] [Accepted: 06/23/2023] [Indexed: 07/07/2023] Open
Abstract
BACKGROUND The effects of vitamin D are exerted by interaction with the vitamin D receptor (VDR) and vitamin D binding protein (VDBP). Polymorphisms in VDR or VDBP genes may affect vitamin D levels, influencing the pathogenesis of asthma and atopy. The aim of this study was to investigate the possible association of VDR and VDBP gene single-nucleotide polymorphisms (SNP), 25-hydroxyvitamin D (25(OH)D), blood eosinophils and total IgE level in subjects with asthma in comparison with healthy individuals. METHODS This case-control study enrolled 63 subjects with asthma (45 allergic and 18 non-allergic) and 32 healthy subjects were involved in the study. Sensitization of subjects to inhaled allergens was determined by a skin prick test, lung function was evaluated by spirometry. Blood eosinophil count was determined by standard methods. Serum 25(OH)D and total IgE levels were evaluated by ELISA. Polymorphisms in the VDR and VDBP genes on the 12q13.11 and 4q13.3 chromosomal region were analyzed using TaqMan SNP Genotyping Assay probes. RESULTS In asthma patients with vitamin D deficiency (< 20 ng/ml) the allele G of rs11168293 of VDR was more common than in those having insufficiency (20-30 ng/ml) of vitamin D (63% and 31%, p < 0.05). Moreover, asthmatic subject with rs11168293 G allele has significant higher blood eosinophil count compared to asthmatic without the rs11168293 G allele (8.5 ± 12.3% vs. 5.1 ± 1.5%, p < 0.05). Significantly higher IgE level was found in subjects with allergic asthma with the allele A of rs7041 on VDBP gene than in those without this allele (540 ± 110 and 240 ± 80 IU/ml, p < 0.05). CONCLUSIONS The association of polymorphisms in VDBP and VDR gene, the rs11168293 G allele and the rs7041 A allele, with 25(OH)D, blood eosinophil and total IgE level in asthma, let us suggest that vitamin D, VDR and VDBP gene polymorphisms are important in pathogenesis of asthma despite its form in relation to atopy.
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Affiliation(s)
- Daina Bastyte
- Department of Immunology and Allergology, Lithuanian University of Health Sciences, Kaunas, Lithuania.
- Lab of Immunology, Department of Immunology and Allergology, Lithuanian University of Health Sciences, Kaunas, Lithuania.
| | - Laura Tamasauskiene
- Department of Immunology and Allergology, Lithuanian University of Health Sciences, Kaunas, Lithuania
- Lab of Immunology, Department of Immunology and Allergology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Ieva Golubickaite
- Department of Genetics and Molecular Medicine, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Rasa Ugenskiene
- Department of Genetics and Molecular Medicine, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Brigita Sitkauskiene
- Department of Immunology and Allergology, Lithuanian University of Health Sciences, Kaunas, Lithuania
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11
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Bratu D, Boda D, Caruntu C. Genomic, Epigenomic, Transcriptomic, Proteomic and Metabolomic Approaches in Atopic Dermatitis. Curr Issues Mol Biol 2023; 45:5215-5231. [PMID: 37367080 DOI: 10.3390/cimb45060331] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/03/2023] [Accepted: 06/07/2023] [Indexed: 06/28/2023] Open
Abstract
Atopic dermatitis (AD) is a chronic inflammatory skin disease with a high prevalence in the developed countries. It is associated with atopic and non-atopic diseases, and its close correlation with atopic comorbidities has been genetically demonstrated. One of the main roles of genetic studies is to comprehend the defects of the cutaneous barrier due to filaggrin deficit and epidermal spongiosis. Recently, epigenetic studies started to analyze the influence of the environmental factors on gene expression. The epigenome is considered to be a superior second code that controls the genome, which includes alterations of the chromatin. The epigenetic changes do not alter the genetic code, however, changes in the chromatin structure could activate or inhibit the transcription process of certain genes and consequently, the translation process of the new mRNA into a polypeptide chain. In-depth analysis of the transcriptomic, metabolomic and proteomic studies allow to unravel detailed mechanisms that cause AD. The extracellular space and lipid metabolism are associated with AD that is independent of the filaggrin expression. On the other hand, around 45 proteins are considered as the principal components in the atopic skin. Moreover, genetic studies based on the disrupted cutaneous barrier can lead to the development of new treatments targeting the cutaneous barrier or cutaneous inflammation. Unfortunately, at present, there are no target therapies that focus on the epigenetic process of AD. However, in the future, miR-143 could be an important objective for new therapies, as it targets the miR-335:SOX axis, thereby restoring the miR-335 expression, and repairing the cutaneous barrier defects.
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Affiliation(s)
- Dalia Bratu
- Department of Dermatology, 'Colentina' Clinical Hospital, 020125 Bucharest, Romania
- Department of Dermatology, 'Carol Davila' University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Daniel Boda
- Department of Dermatology, 'Carol Davila' University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Department of Dermatology, 'Ponderas' Academic Hospital, 014142 Bucharest, Romania
- Department of Dermatology, "Prof. N.C. Paulescu" National Institute of Diabetes, Nutrition and Metabolic Diseases, 011233 Bucharest, Romania
| | - Constantin Caruntu
- Department of Dermatology, "Prof. N.C. Paulescu" National Institute of Diabetes, Nutrition and Metabolic Diseases, 011233 Bucharest, Romania
- Department of Physiology, "Carol Davila" University of Medicine and Pharmacy, 050474 Bucharest, Romania
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12
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Sobczak M, Pawliczak R. Relationship between vitamin D and asthma from gestational to adulthood period: a meta-analysis of randomized clinical trials. BMC Pulm Med 2023; 23:212. [PMID: 37330474 DOI: 10.1186/s12890-023-02514-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 06/08/2023] [Indexed: 06/19/2023] Open
Abstract
BACKGROUND Despite numerous studies investigating vitamin D, its impact on asthma is still unknown. The aim of our meta-analysis is to analyze the vitamin D supplementation influence on asthma prevention and treatment ranging from gestational to adulthood period. METHODS Fifteen randomized clinical trials were included after database search. Studies contained the analyzed endpoints: the number of asthma and wheezing occurrence in gestational and infantile periods, the change of childhood/adult asthma control test score and forced expiratory volume in one second (FEV1) in childhood and adulthood periods. Random effects model was used to calculate effect sizes. RESULTS Supplementation by women during pregnancy period decreased the wheezing occurrence in their children by 23% (RR = 0.77; 95% CI [0.64; 0.92]; p < 0.0049, I2 = 0%); whereas had no effect on given asthma parameters during the infantile period. Moreover, vitamin D administration had negative effect on the FEV1 change in children (MD = -3.84; 95% CI [-7.68; -0.01]; p = 0.0497; I2 = 95%), but had positive effect on the change of ACT score in adults (MD = 1.80; 95% CI [0.12; 3.49]; p = 0.0359; I2 = 99%). CONCLUSIONS Our meta-analysis showed the varying results depending on patient's life period. It is important to further investigate the role of vitamin D supplementation in asthma management.
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Affiliation(s)
- Marharyta Sobczak
- Department of Immunopathology, Division of Biomedical Science, Faculty of Medicine, Medical University of Lodz, Zeligowskiego 7/9 St, 90-752, Lodz, Poland
| | - Rafal Pawliczak
- Department of Immunopathology, Division of Biomedical Science, Faculty of Medicine, Medical University of Lodz, Zeligowskiego 7/9 St, 90-752, Lodz, Poland.
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13
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Xu JJ, Zhang XB, Tong WT, Ying T, Liu KQ. Phenome-wide Mendelian randomization study evaluating the association of circulating vitamin D with complex diseases. Front Nutr 2023; 10:1108477. [PMID: 37063319 PMCID: PMC10095159 DOI: 10.3389/fnut.2023.1108477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Accepted: 03/01/2023] [Indexed: 03/30/2023] Open
Abstract
BackgroundCirculating vitamin D has been associated with multiple clinical diseases in observational studies, but the association was inconsistent due to the presence of confounders. We conducted a bidirectional Mendelian randomization (MR) study to explore the healthy atlas of vitamin D in many clinical traits and evaluate their causal association.MethodsBased on a large-scale genome-wide association study (GWAS), the single nucleotide polymorphism (SNPs) instruments of circulating 25-hydroxyvitamin D (25OHD) from 443,734 Europeans and the corresponding effects of 10 clinical diseases and 42 clinical traits in the European population were recruited to conduct a bidirectional two-sample Mendelian randomization study. Under the network of Mendelian randomization analysis, inverse-variance weighting (IVW), weighted median, weighted mode, and Mendelian randomization (MR)–Egger regression were performed to explore the causal effects and pleiotropy. Mendelian randomization pleiotropy RESidual Sum and Outlier (MR-PRESSO) was conducted to uncover and exclude pleiotropic SNPs.ResultsThe results revealed that genetically decreased vitamin D was inversely related to the estimated BMD (β = −0.029 g/cm2, p = 0.027), TC (β = −0.269 mmol/L, p = 0.006), TG (β = −0.208 mmol/L, p = 0.002), and pulse pressure (β = −0.241 mmHg, p = 0.043), while positively associated with lymphocyte count (β = 0.037%, p = 0.015). The results did not reveal any causal association of vitamin D with clinical diseases. On the contrary, genetically protected CKD was significantly associated with increased vitamin D (β = 0.056, p = 2.361 × 10−26).ConclusionThe putative causal effects of circulating vitamin D on estimated bone mass, plasma triglyceride, and total cholesterol were uncovered, but not on clinical diseases. Vitamin D may be linked to clinical disease by affecting health-related metabolic markers.
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Affiliation(s)
- Jin-jian Xu
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Sun Yat-sen University (North Campus), Guangzhou, Guangdong, China
- Department of Epidemiology, School of Public Health, Sun Yat-sen University (North Campus), Guangzhou, Guangdong, China
| | - Xiao-bin Zhang
- Department of Hepatobiliary Surgery, Jingdezhen No.1 People's Hospital, Jingdezhen, Jiangxi, China
| | - Wen-tao Tong
- Department of Hepatobiliary Surgery, Jingdezhen No.1 People's Hospital, Jingdezhen, Jiangxi, China
| | - Teng Ying
- Department of Cardiology, The First Affiliated Hospital of Jiangxi Medical College, Shangrao, Jiangxi, China
| | - Ke-qi Liu
- Department of Clinical Medicine, Jiangxi Medical College, Shangrao, Jiangxi, China
- *Correspondence: Ke-qi Liu
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14
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Clarke SLN, Mitchell RE, Sharp GC, Ramanan AV, Relton CL. Vitamin D Levels and Risk of Juvenile Idiopathic Arthritis: A Mendelian Randomization Study. Arthritis Care Res (Hoboken) 2023; 75:674-681. [PMID: 34748291 DOI: 10.1002/acr.24815] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 10/19/2021] [Accepted: 11/04/2021] [Indexed: 11/12/2022]
Abstract
OBJECTIVES Observational studies report mixed findings regarding the association between vitamin D and juvenile idiopathic arthritis (JIA) incidence or activity; however, such studies are susceptible to considerable bias. Because low vitamin D levels are common within the general population and easily corrected, there is potential public health benefit in identifying a causal association between vitamin D insufficiency and JIA incidence. To limit bias due to confounding and reverse causation, we examined the causal effect of the major circulating form of vitamin D, 25-hydroxy vitamin D (25-[OH]D), on JIA incidence using Mendelian randomization (MR). METHODS In this 2-sample MR analysis, we used summary level data from the largest and most recent genome-wide association study of 25-(OH)D levels (sample size 443,734), alongside summary data from 2 JIA genetic studies (sample sizes 15,872 and 12,501), all from European populations. To test and account for potential bias due to pleiotropy, we employed multiple MR methods and sensitivity analyses. RESULTS We found no evidence of a causal relationship between genetically predicted 25-(OH)D levels and JIA incidence (odds ratio 1.00 [95% confidence interval (95% CI) 0.76, 1.33] per SD increase in standardized natural-log transformed 25-[OH]D levels). This estimate was consistent across all methods tested. Additionally, there was no evidence that genetically predicted JIA causally influences 25-(OH)D levels (-0.002 SD change in standardized natural-log transformed 25-[OH]D levels per doubling odds in genetically predicted JIA [95% CI -0.006, 0.002]). CONCLUSION Given the lack of a causal relationship between 25-(OH)D levels and JIA, population level vitamin D supplementation is unlikely to reduce JIA incidence.
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Affiliation(s)
- Sarah L N Clarke
- University of Bristol and Bristol Royal Hospital for Children, Bristol, UK
| | | | - Gemma C Sharp
- University of Bristol, Bristol, UK, and University of Exeter, Exeter, UK
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15
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Zhou Y, Qiu Y, Bao W, Han L, Xue Y, Zhang Y, Tian X, Fu Q, Lv C, Yin D, Zhang M. Evaluating the effects of vitamin D Level on airway obstruction in two asthma endotypes in humans and in two mouse models with different intake of vitamin D during early-life. Front Immunol 2023; 14:1107031. [PMID: 36793727 PMCID: PMC9922677 DOI: 10.3389/fimmu.2023.1107031] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 01/06/2023] [Indexed: 02/03/2023] Open
Abstract
Introduction Asthma is primarily divided into two categories: type 2 (T2-high) and non-type 2 (T2-low). A relationship between asthma severity and vitamin D deficiency has been identified, but its impact on each asthma endotype remains unknown. Methods We clinically examined the influence of vitamin D on patients with T2-high (n = 60) or T2-low asthma (n = 36) compared with controls (n = 40). Serum 25(OH)D levels, inflammatory cytokines and spirometry were measured. Mouse models were then used to further analyze the effects of vitamin D on both asthmatic endotypes. BALB/c mice were fed with vitamin D-deficient (LVD), -sufficient (NVD), or -supplemented diets (HVD) throughout lactation and offspring followed the same diet after weaning. Offspring were sensitized/challenged with ovalbumin (OVA) to establish "T2-high" asthma or OVA combined with ozone exposure (OVA + ozone) to induce "T2-low" asthma. Spirometry and serum, bronchoalveolar lavage fluid (BALF), and lung tissues were analyzed. Results Serum 25(OH)D levels were decreased in asthmatic patients compared with controls. Patients with vitamin D deficiency (Lo) had varying degrees of elevation of the pro-inflammatory cytokines IL-5, IL-6, and IL-17A, decreased expression of the anti-inflammatory cytokine IL-10, and altered forced expiratory volume in the first second as a percentage of predicted value (FEV1%pred) in both asthmatic endotypes. Vitamin D status had a stronger correlation with FEV1%pred in T2-low asthma than T2-high asthma, and 25(OH)D level was only positively linked to maximal mid-expiratory flow as a percentage of predicted value (MMEF%pred) in the T2-low group. Inflammation, hyperresponsiveness, and airway resistance (RL) was increased in both asthma models compared with controls while vitamin D deficiency further increased airway inflammation and airway obstruction. These findings were particularly prominent in T2-low asthma. Discussion The potential function and mechanisms of vitamin D and both asthma endotypes should be studied individually, and further analysis of the potential signaling pathways involved with vitamin D on T2-low asthma is warranted.
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Affiliation(s)
- Yan Zhou
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yali Qiu
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital of Nanjing Medical University, Shanghai, China
| | - Wuping Bao
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lei Han
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yishu Xue
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yingying Zhang
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xue Tian
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qiang Fu
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chengjian Lv
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Dongning Yin
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Min Zhang
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital of Nanjing Medical University, Shanghai, China,*Correspondence: Min Zhang,
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Ren Y, Liu J, Li W, Zheng H, Dai H, Qiu G, Yu D, Yao D, Yin X. Causal Associations between Vitamin D Levels and Psoriasis, Atopic Dermatitis, and Vitiligo: A Bidirectional Two-Sample Mendelian Randomization Analysis. Nutrients 2022; 14:nu14245284. [PMID: 36558443 PMCID: PMC9785064 DOI: 10.3390/nu14245284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Vitamin D level has been reported to be associated with psoriasis, atopic dermatitis, and vitiligo. However, its causal relationship with the risk of these three diseases remains unclear. METHODS We obtained genome-wide association statistics for three measures of circulating vitamin D levels (25(OH)D in 120,618 individuals, and 25(OH)D3 and epimeric form C3-epi-25(OH)D3 in 40,562 individuals) and for the diseases psoriasis (3871 cases and 333,288 controls), atopic dermatitis (21,399 cases and 95,464 controls), and vitiligo (4680 cases and 39,586 controls). We performed Mendelian randomization using inverse-variance weighted, weighted median, MR-Egger, and MR-pleiotropy residual sum and outlier methods. We carried out sensitivity analyses to evaluate the robustness of the results. RESULTS We showed that elevated vitamin D levels protected individuals from developing psoriasis (OR = 0.995, p = 8.84 × 10-4 for 25(OH)D; OR = 0.997, p = 1.81 × 10-3 for 25(OH)D3; and OR = 0.998, p = 0.044 for C3-epi-25(OH)D3). Genetically predicted risk of atopic dermatitis increased the levels of 25(OH)D (OR = 1.040, p = 7.14 × 10-4) and 25(OH)D3 (OR = 1.208, p = 0.048). A sensitivity analysis suggested the robustness of these causal associations. CONCLUSIONS This study reported causal relationships between circulating vitamin D levels and the risk of psoriasis, atopic dermatitis, and vitiligo. These findings provide potential disease intervention and monitoring targets.
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Affiliation(s)
- Yunqing Ren
- Department of Dermatology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
- Correspondence: (Y.R.); (X.Y.)
| | - Jipeng Liu
- Department of Dermatology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
| | - Wei Li
- Department of Dermatology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
| | - Huiwen Zheng
- Department of Dermatology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
| | - Huatuo Dai
- Department of Dermatology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
| | - Guiying Qiu
- Department of Dermatology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
| | - Dianhe Yu
- Department of Dermatology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
| | - Dianyi Yao
- Department of Dermatology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
| | - Xianyong Yin
- Department of Biostatistics and Center for Statistical Genetics, University of Michigan School of Public Health, Ann Arbor, MI 48109, USA
- Correspondence: (Y.R.); (X.Y.)
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Miraglia del Giudice M, Indolfi C, Dinardo G, Decimo F, Decimo A, Klain A. Vitamin D status can affect COVID-19 outcomes also in pediatric population. PHARMANUTRITION 2022; 22:100319. [PMID: 36268528 PMCID: PMC9562619 DOI: 10.1016/j.phanu.2022.100319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 10/12/2022] [Accepted: 10/12/2022] [Indexed: 11/03/2022]
Abstract
Background vitamin D influences the immune system and the inflammatory response. It is known that vitamin D supplementation reduces the risk of acute respiratory tract infection. In the last two years, many researchers have investigated vitamin D's role in the pathophysiology of COVID-19 disease. Results the findings obtained from clinical trials and systematic reviews highlight that most patients with COVID-19 have decreased vitamin D levels and low levels of vitamin D increase the risk of severe disease. This evidence seems to be also confirmed in the pediatric population. Conclusions further studies (systematic review and meta-analysis) conducted on children are needed to confirm that vitamin D affects COVID-19 outcomes and to determine the effectiveness of supplementation and the appropriate dose, duration and mode of administration.
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Key Words
- , IFN-γ, reduce interferon-gamma
- , RAS, renin-angiotensin system
- ACE2, angiotensin-converting enzyme 2
- CI, confidence interval
- COVID-19
- Children
- DAMPs, damage-associated molecular patterns
- DCs, dendritic cells
- HR, Hazard Risk
- ICU, intensive care unit
- IL, interleukin
- IgE, immunoglobulin E
- Immunity
- MD, mean difference
- NK, natural killer
- OR, odds ratio
- PAMPs, pathogen-associated molecular patterns
- PRRs, pattern recognition receptors
- RCTs, randomized control trials
- RR, risk ratio
- SARS-CoV-2 infection
- TLRs, Toll-like receptors
- TNF-α, tumor necrosis factor-α
- Treg cells, CD, regulatory T cellcluster of differentiation
- VDRs, vitamin D receptors
- Vitamin D
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Affiliation(s)
- Michele Miraglia del Giudice
- Department of Woman, Child and General and Specialized Surgery, University of Campania "Luigi Vanvitelli", Naples, Italy,Correspondence to: Department of Woman, Child and General and Specialized Surgery, University of Campania “Luigi Vanvitelli”, Via Luigi de Crecchio, 4, 80138 Naples, Italy
| | - Cristiana Indolfi
- Department of Woman, Child and General and Specialized Surgery, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Giulio Dinardo
- Department of Woman, Child and General and Specialized Surgery, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Fabio Decimo
- Department of Woman, Child and General and Specialized Surgery, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Alberto Decimo
- Department of Mental, Physical Health and Preventive Medicine, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Angela Klain
- Department of Woman, Child and General and Specialized Surgery, University of Campania "Luigi Vanvitelli", Naples, Italy
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Mikkelsen H, Landt EM, Benn M, Nordestgaard BG, Dahl M. Causal risk factors for asthma in Mendelian randomization studies: A systematic review and meta-analysis. Clin Transl Allergy 2022; 12:e12207. [PMID: 36434743 PMCID: PMC9640961 DOI: 10.1002/clt2.12207] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 05/23/2022] [Accepted: 10/13/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Several risk factors for asthma have been proposed; however, the causality of these associations is sometimes unclear. Mendelian randomization is a powerful epidemiological approach that can help elucidate the causality of risk factors. The aim of the present study was to identify causal risk factors for asthma through Mendelian Randomization studies. METHODS A systematic search of PubMed and EMBASE was conducted, to identify studies investigating risk factors for asthma or respiratory allergies through Mendelian Randomization. When two or more studies investigated the same risk factor a meta-analysis was conducted. Of 239 studies initially identified, 41 were included. RESULTS A causal association between adiposity and adult asthma risk was found in 10 out of 12 studies with a summary risk ratio of 1.05 per kg/m2 increase in BMI (95% CI: 1.03-1.07). Puberty timing (n = 3), alcohol (n = 2), and linoleic acid (n = 1) had causal effects on asthma risk, while vitamins/minerals (n = 6) showed no consistent effect on asthma. The effect of smoking on adult asthma conflicted between studies. Several of the significant associations of asthma with immune related proteins (n = 5) and depression (n = 2) investigated through multiple traits analyses could generally benefit from replications in independent datasets. CONCLUSION This systematic review and meta-analysis found evidence for causal effects of adiposity, puberty timing, linoleic acid, alcohol, immune related proteins, and depression on risk of asthma.
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Affiliation(s)
- Heidi Mikkelsen
- Department of Clinical BiochemistryZealand University HospitalKøgeDenmark,Department of Clinical Medicine, Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | - Eskild Morten Landt
- Department of Clinical BiochemistryZealand University HospitalKøgeDenmark,Department of Clinical Medicine, Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | - Marianne Benn
- Department of Clinical Medicine, Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark,Department of Clinical BiochemistryRigshospitaletCopenhagen University HospitalCopenhagenDenmark
| | - Børge Grønne Nordestgaard
- Department of Clinical Medicine, Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark,Department of Clinical BiochemistryHerlev and Gentofte HospitalCopenhagen University HospitalHerlevDenmark
| | - Morten Dahl
- Department of Clinical BiochemistryZealand University HospitalKøgeDenmark,Department of Clinical Medicine, Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
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19
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Effect of Vitamin D Serum Levels and Supplementation on Atopic Dermatitis: A Systematic Review and Meta-analysis. Am J Clin Dermatol 2022; 23:267-275. [PMID: 35246808 DOI: 10.1007/s40257-022-00677-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/16/2022] [Indexed: 11/01/2022]
Abstract
BACKGROUND Previous studies have shown that serum 25-hydroxyvitamin D (25(OH)D) may be associated with atopic dermatitis (AD), and that vitamin D (VD) supplementation may decrease AD severity. OBJECTIVE The aim of this study was to investigate the association between serum 25(OH)D level and AD, and the effect of VD supplementation on AD severity, while providing stratified analyses based on latitude and region. METHODS A systematic review was performed on all published studies in MEDLINE, Embase, and Cochrane Library databases that analyzed effects of serum 25(OH)D and VD supplementation on AD. RESULTS This systematic review and meta-analysis includes 20 studies with 1882 cases of AD. We found significantly lower 25(OH)D levels in AD patients compared with healthy controls (HC) (p < 0.001), significantly lower 25(OH)D levels in severe AD compared with both mild and moderate AD (p < 0.001), and VD supplementation improved AD symptoms (p < 0.001). LIMITATIONS Factors like seasonal and environmental changes, sunlight exposure, and cultural practices may confound the relationship between serum 25(OH)D and AD severity. There are limited randomized controlled trials that assess this association. CONCLUSION Overall, lower serum 25(OH)D is associated with more severe AD, and VD supplementation may help lower AD severity. Further research is needed to confirm the presence and direction of causality of the relationship between VD and AD pathogenesis.
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Quester J, Nethander M, Eriksson A, Ohlsson C. Endogenous DHEAS Is Causally Linked With Lumbar Spine Bone Mineral Density and Forearm Fractures in Women. J Clin Endocrinol Metab 2022; 107:e2080-e2086. [PMID: 34935937 PMCID: PMC9016453 DOI: 10.1210/clinem/dgab915] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Indexed: 11/29/2022]
Abstract
CONTEXT A recent pooled analysis of four clinical trials demonstrated that treatment with dehydroepiandrosterone (DHEA) increases lumbar spine bone mineral density (LS-BMD) in women. The causal effect of endogenous adrenal-derived DHEA sulphate (DHEAS) on LS-BMD and fracture risk in women is unknown. OBJECTIVE To determine whether circulating DHEAS is causally associated with LS-BMD and fracture risk in women. METHODS A 2-sample Mendelian randomization study using genetic predictors of serum DHEAS derived from the largest available female-specific genome wide association study (GWAS) meta-analysis (n = 8565). Genetic associations with dual-energy X-ray absorptiometry-derived BMD (n = 22 900) were obtained from female-specific GWAS summary statistics available from the Genetic Factors for Osteoporosis consortium while individual-level data of 238 565 women of white ancestry from the UK Biobank were used for associations with fractures (11 564 forearm fractures, 2604 hip fractures) and estimated heel BMD by ultrasound (eBMD). RESULTS A 1 SD genetically instrumented increase in log serum DHEAS levels was associated with a 0.21 SD increase in LS-BMD (P = 0.01) and a 0.08 SD increase in eBMD (P < 0.001). Genetically predicted DHEAS decreased forearm fracture risk (odds ratio 0.70, 95% CI 0.55-0.88 per SD increase in DHEAS) while no significant causal association with hip fractures was observed. CONCLUSIONS Genetically predicted serum DHEAS increases LS-BMD and decreases forearm fracture risk in women. Based on the results of the present study and previous randomized controlled trials of DHEA treatment, we propose that both endogenous adrenal-derived DHEA(S) and pharmacological DHEA treatment improve bone health in women.
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Affiliation(s)
- Johan Quester
- Sahlgrenska Osteoporosis Centre, Centre for Bone and Arthritis Research, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Clinical Pharmacology, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden
- Correspondence: Johan Quester, MD, Sahlgrenska Osteoporosis Centre, Centre for Bone and Arthritis Research, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, Vita Stråket 11, SE-413 45 Gothenburg, Sweden.
| | - Maria Nethander
- Sahlgrenska Osteoporosis Centre, Centre for Bone and Arthritis Research, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Bioinformatics Core Facility, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anna Eriksson
- Sahlgrenska Osteoporosis Centre, Centre for Bone and Arthritis Research, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Clinical Pharmacology, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden
| | - Claes Ohlsson
- Sahlgrenska Osteoporosis Centre, Centre for Bone and Arthritis Research, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Clinical Pharmacology, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden
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Zha L, Wu G, Xiao H, Xiao Y. Vitamin D Attenuates Airway Inflammation in Asthmatic Guinea Pigs Using Mammalian Target of Rapamycin-Mediated Autophagy. J Interferon Cytokine Res 2022; 42:170-179. [PMID: 35438528 DOI: 10.1089/jir.2021.0189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The purpose of this experiment is to find out the function of Vitamin D (VD) in airway inflammation in asthmatic guinea pigs by regulating mammalian target of rapamycin (mTOR)-mediated autophagy. A total of 40 male guinea pigs were randomly assigned into the Con group, the ovalbumin (OVA)-sensitized group, the VD group, the VD + dimethyl sulfoxide group, and the VD + rapamycin (mTOR inhibitor) group. Then, serum from all groups was harvested for the measurement of immunoglobulin E (IgE), interleukin (IL)-4, and IL-5 levels. Next, bronchoalveolar lavage fluid was collected for cell counting. Moreover, lung tissues were extracted to assess levels of p-mTOR and autophagy factors (LC3B, Beclin1, Atg5, and P62). Compared with the Con group, the OVA group showed elevated levels of IgE, IL-4, and IL-5, increased contents of eosinophils, neutrophil, and lymphocytes, and declined monocytes. And the VD group improved inflammatory reactions in the guinea pigs. Besides, the OVA group showed lower levels of p-mTOR and P62 and higher autophagy levels than the Con group, while the VD group had opposite results. Rapamycin annulled the suppressive role of VD to airway inflammation in asthmatic guinea pigs. VD might inhibit OVA-induced airway inflammation by inducing mTOR activation and downregulating autophagy in asthmatic guinea pigs.
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Affiliation(s)
- Lin Zha
- Department of Pediatric, Puren Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, China
| | - Guangji Wu
- Department of Pediatric, Puren Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, China
| | - Hongli Xiao
- Department of Pediatric, Puren Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, China
| | - Yanmin Xiao
- Department of Pediatric, Puren Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, China
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Gao L, Wang K, Ni QB, Fan H, Zhao L, Huang L, Yang M, Li H. Educational Attainment and Ischemic Stroke: A Mendelian Randomization Study. Front Genet 2022; 12:794820. [PMID: 35222520 PMCID: PMC8876515 DOI: 10.3389/fgene.2021.794820] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 12/24/2021] [Indexed: 11/25/2022] Open
Abstract
Observational studies have evaluated the potential association of socioeconomic factors such as higher education with the risk of stroke but reported controversial findings. The objective of our study was to evaluate the potential causal association between higher education and the risk of stroke. Here, we performed a Mendelian randomization analysis to evaluate the potential association of educational attainment with ischemic stroke (IS) using large-scale GWAS datasets from the Social Science Genetic Association Consortium (SSGAC, 293,723 individuals), UK Biobank (111,349 individuals), and METASTROKE consortium (74,393 individuals). We selected three Mendelian randomization methods including inverse-variance-weighted meta-analysis (IVW), weighted median regression, and MR–Egger regression. IVW showed that each additional 3.6-year increase in years of schooling was significantly associated with a reduced IS risk (OR = 0.54, 95% CI: 0.41–0.71, and p = 1.16 × 10–5). Importantly, the estimates from weighted median (OR = 0.49, 95% CI: 0.33–0.73, and p = 1.00 × 10–3) and MR–Egger estimate (OR = 0.18, 95% CI: 0.06–0.60, and p = 5.00 × 10–3) were consistent with the IVW estimate in terms of direction and magnitude. In summary, we provide genetic evidence that high education could reduce IS risk.
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Affiliation(s)
- Luyan Gao
- Department of Neurology, Tianjin Fourth Central Hospital, The Fourth Central Hospital Affilicated to Nankai University, The Fourth Central Clinical College of Tianjin Medical University, Tianjin, China
| | - Kun Wang
- Taishan Academy of Medical Sciences, Taian City Central Hospital, Taian, China
| | - Qing-Bin Ni
- Taishan Academy of Medical Sciences, Taian City Central Hospital, Taian, China
| | - Hongguang Fan
- Department of Neurology, Tianjin Fourth Central Hospital, The Fourth Central Hospital Affilicated to Nankai University, The Fourth Central Clinical College of Tianjin Medical University, Tianjin, China
| | - Lan Zhao
- Department of Neurology, Tianjin Fourth Central Hospital, The Fourth Central Hospital Affilicated to Nankai University, The Fourth Central Clinical College of Tianjin Medical University, Tianjin, China
| | - Lei Huang
- Department of Neurology, Tianjin Fourth Central Hospital, The Fourth Central Hospital Affilicated to Nankai University, The Fourth Central Clinical College of Tianjin Medical University, Tianjin, China
| | - Mingfeng Yang
- Second Affiliated Hospital, Brain Science Institute, Key Laboratory of Cerebral Microcirculation in Universities of Shandong, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
- *Correspondence: Mingfeng Yang, ; Huanming Li,
| | - Huanming Li
- Department of Cardiovascular, Tianjin Fourth Central Hospital, The Fourth Central Hospital Affilicated to Nankai University, The Fourth Central Clinical College of Tianjin Medical University, Tianjin, China
- *Correspondence: Mingfeng Yang, ; Huanming Li,
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Bouillon R, Manousaki D, Rosen C, Trajanoska K, Rivadeneira F, Richards JB. The health effects of vitamin D supplementation: evidence from human studies. Nat Rev Endocrinol 2022; 18:96-110. [PMID: 34815552 PMCID: PMC8609267 DOI: 10.1038/s41574-021-00593-z] [Citation(s) in RCA: 172] [Impact Index Per Article: 86.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/25/2021] [Indexed: 12/16/2022]
Abstract
Vitamin D supplementation can prevent and cure nutritional rickets in infants and children. Preclinical and observational data suggest that the vitamin D endocrine system has a wide spectrum of skeletal and extra-skeletal activities. There is consensus that severe vitamin D deficiency (serum 25-hydroxyvitamin D (25OHD) concentration <30 nmol/l) should be corrected, whereas most guidelines recommend serum 25OHD concentrations of >50 nmol/l for optimal bone health in older adults. However, the causal link between vitamin D and many extra-skeletal outcomes remains unclear. The VITAL, ViDA and D2d randomized clinical trials (combined number of participants >30,000) indicated that vitamin D supplementation of vitamin D-replete adults (baseline serum 25OHD >50 nmol/l) does not prevent cancer, cardiovascular events, falls or progression to type 2 diabetes mellitus. Post hoc analysis has suggested some extra-skeletal benefits for individuals with vitamin D deficiency. Over 60 Mendelian randomization studies, designed to minimize bias from confounding, have evaluated the consequences of lifelong genetically lowered serum 25OHD concentrations on various outcomes and most studies have found null effects. Four Mendelian randomization studies found an increased risk of multiple sclerosis in individuals with genetically lowered serum 25OHD concentrations. In conclusion, supplementation of vitamin D-replete individuals does not provide demonstrable health benefits. This conclusion does not contradict older guidelines that severe vitamin D deficiency should be prevented or corrected.
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Affiliation(s)
- Roger Bouillon
- Clinical and Experimental Endocrinology, Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium.
| | - Despoina Manousaki
- Research Center of the Sainte-Justine University Hospital, University of Montreal, Montreal, Quebec, Canada
| | - Cliff Rosen
- Maine Medical Center Research Institute, Scarborough, ME, USA
| | - Katerina Trajanoska
- Department of Internal Medicine, Erasmus MC University Medical Center, Rotterdam, Netherlands
| | - Fernando Rivadeneira
- Translational Skeletal Genomics, Department of Internal Medicine, Erasmus MC University Medical Center, Rotterdam, Netherlands
| | - J Brent Richards
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada
- Departments of Medicine, Human Genetics, Epidemiology and Biostatistics, McGill University, Montreal, Quebec, Canada
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Effect of vitamin D supplementation on total and allergen-specific IgE in children with asthma and low vitamin D levels. J Allergy Clin Immunol 2022; 149:440-444.e2. [PMID: 34118248 PMCID: PMC8655021 DOI: 10.1016/j.jaci.2021.05.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 04/27/2021] [Accepted: 05/25/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND Observational studies have yielded inconsistent findings for the relation between vitamin D level and total IgE or allergic sensitization. OBJECTIVE To determine whether vitamin D supplementation reduces levels of total IgE and IgE to each of 2 common indoor allergens in children with asthma and low vitamin D levels. METHODS Total IgE, IgE to Dermatophagoides pteronyssinus, and IgE to Blattella germanica were measured at the randomization and exit visits for 174 participants in the Vitamin D Kids Asthma Study, a multicenter, double-blind, randomized placebo-controlled trial of vitamin D3 supplementation (4000 IU/d) to prevent severe exacerbations in children with persistent asthma and vitamin D levels less than 30 ng/mL. Multivariable linear regression was used for the analysis of the effect of vitamin D supplementation on change in each IgE measure. RESULTS Participants were followed for an average of 316 days. At the exit visit, more subjects in the vitamin D arm achieved a vitamin D level equal to or more than 30 ng/mL compared with those in the placebo arm (87% vs 30%; P < .001). In a multivariable analysis, vitamin D3 supplementation had no significant effect on change in total IgE, IgE to Dermatophagoides pteronyssinus, or IgE to Blattella germanica between the exit and randomization visits (eg, for log10 total IgE, β = 0.007; 95% CI, -0.061 to 0.074; P = .85). CONCLUSIONS Vitamin D supplementation, compared with placebo, has no significant effect on serum levels of total IgE, IgE to dust mite, or IgE to cockroach in children with asthma and low vitamin D levels.
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25
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Indian Academy of Pediatrics Revised (2021) Guidelines on Prevention and Treatment of Vitamin D Deficiency and Rickets. Indian Pediatr 2021. [DOI: 10.1007/s13312-022-2448-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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26
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Liu D, Meng X, Tian Q, Cao W, Fan X, Wu L, Song M, Meng Q, Wang W, Wang Y. Vitamin D and Multiple Health Outcomes: An Umbrella Review of Observational Studies, Randomized Controlled Trials, and Mendelian Randomization Studies. Adv Nutr 2021; 13:1044-1062. [PMID: 34999745 PMCID: PMC9340982 DOI: 10.1093/advances/nmab142] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/29/2020] [Accepted: 11/19/2021] [Indexed: 12/18/2022] Open
Abstract
Observational studies, randomized controlled trials (RCTs), and Mendelian randomization (MR) studies have yielded inconsistent results on the associations of vitamin D concentrations with multiple health outcomes. In the present umbrella review we aimed to evaluate the effects of low vitamin D concentrations and vitamin D supplementation on multiple health outcomes. We summarized current evidence obtained from meta-analyses of observational studies that examined associations between vitamin D concentrations and multiple health outcomes, meta-analyses of RCTs that investigated the effect of vitamin D supplementation on multiple health outcomes, and MR studies that explored the causal associations of vitamin D concentrations with various diseases (international prospective register of systematic reviews PROSPERO registration number CRD42018091434). A total of 296 meta-analyses of observational studies comprising 111 unique outcomes, 139 meta-analyses of RCTs comprising 46 unique outcomes, and 73 MR studies comprising 43 unique outcomes were included in the present umbrella review. Twenty-eight disease outcomes were identified by both meta-analyses of observational studies and MR studies. Seventeen of these reported disease outcomes had consistent results, demonstrating that lower concentrations of vitamin D were associated with a higher risk for all-cause mortality, Alzheimer's disease, hypertension, schizophrenia, and type 2 diabetes. The combinations of consistent evidence obtained by meta-analyses of observational studies and MR studies together with meta-analyses of RCTs showed that vitamin D supplementation was associated with a decreased risk for all-cause mortality but not associated with the risk for Alzheimer's disease, hypertension, schizophrenia, or type 2 diabetes. The results indicated that vitamin D supplementation is a promising strategy with long-term preventive effects on multiple chronic diseases and thus has the potential to decrease all-cause mortality. However, the current vitamin D supplementation strategy might not be an efficient intervention approach for these diseases, suggesting that new strategies are highly needed to improve the intervention outcomes.
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Affiliation(s)
- Di Liu
- Beijing Key Laboratory of Clinical Epidemiology, School of Public Health, Capital Medical University, Beijing, China,Centre for Biomedical Information Technology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, China
| | - Xiaoni Meng
- Beijing Key Laboratory of Clinical Epidemiology, School of Public Health, Capital Medical University, Beijing, China
| | - Qiuyue Tian
- Beijing Key Laboratory of Clinical Epidemiology, School of Public Health, Capital Medical University, Beijing, China
| | - Weijie Cao
- Beijing Key Laboratory of Clinical Epidemiology, School of Public Health, Capital Medical University, Beijing, China
| | - Xin Fan
- School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Lijuan Wu
- Beijing Key Laboratory of Clinical Epidemiology, School of Public Health, Capital Medical University, Beijing, China
| | - Manshu Song
- Centre for Precision Health, School of Medical and Health Sciences, Edith Cowan University, Perth, WA, Australia
| | - Qun Meng
- Beijing Key Laboratory of Clinical Epidemiology, School of Public Health, Capital Medical University, Beijing, China
| | - Wei Wang
- Beijing Key Laboratory of Clinical Epidemiology, School of Public Health, Capital Medical University, Beijing, China,Centre for Precision Health, School of Medical and Health Sciences, Edith Cowan University, Perth, WA, Australia,School of Public Health, Shandong First Medical University and Shandong Academy of Medical Science, Tai'an, Shandong, China
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Grübler MR, Zittermann A, Verheyen ND, Trummer C, Theiler-Schwetz V, Keppel MH, Malle O, Richtig G, Gängler S, Bischoff-Ferrari H, Scharnagl H, Meinitzer A, März W, Tomaschitz A, Pilz S. Randomized trial of vitamin D versus placebo supplementation on markers of systemic inflammation in hypertensive patients. Nutr Metab Cardiovasc Dis 2021; 31:3202-3209. [PMID: 34629245 DOI: 10.1016/j.numecd.2021.07.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/21/2021] [Accepted: 07/28/2021] [Indexed: 01/17/2023]
Abstract
BACKGROUND AND AIMS Animal and cell models indicated that vitamin D modulates inflammatory activity, which is considered relevant in the pathogenesis of arterial hypertension and cardiovascular diseases. We therefore aimed to investigate the effect of vitamin D supplementation on systemic markers of inflammation in a cohort of hypertensive patients. METHODS AND RESULTS The Styrian Vitamin D Hypertension Trial is a single-centre, double-blind, placebo-controlled study conducted from 2011 to 2014 in Austria. We enrolled 200 study participants with arterial hypertension and 25-hydroxy-vitamin-D (25(OH)D) concentration below 30 ng/mL. Study participants were randomized to receive either 2800 IU of vitamin D3 per day or placebo for 8 weeks. The present investigation is a post-hoc analysis using analysis of co-variance (ANCOVA). Outcome measures were biomarkers of inflammation including CRP, leukocytes including subtypes and leukocyte-to-lymphocyte ratio, leucine and kynurenic acid. A total of 187 participants (mean age 60.1 ± 11.3years; 47% women; mean baseline 25(OH)D 21.1 ± 5.6 ng/mL) completed the trial. ANCOVA revealed a mean treatment effect for none of the respective outcomes and no significant results were detected in various subgroup analyses. CONCLUSION Vitamin D3 supplementation in hypertensive patients with insufficient 25(OH)D concentrations has no significant effect on lowering markers of systemic inflammation. Further studies investigating the effect of vitamin D on other inflammatory pathways and in populations with severe vitamin D deficiency and a significant inflammatory burden are required. REGISTRATION ClinicalTrials.gov Identifier: NCT02136771; EudraCT No. 2009-018,125-70. Start Date: 2011-04-06.
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Affiliation(s)
- Martin R Grübler
- Department of Internal Medicine, Division of Endocrinology and Diabetology, Medical University of Graz, Graz, Austria; Centre on Aging and Mobility, University Hospital Zurich, Waid City Hospital, and University of Zurich, Zurich, Switzerland.
| | - Armin Zittermann
- Clinic for Thoracic and Cardiovascular Surgery, Herz- und Diabeteszentrum NRW, Ruhr University Bochum, Bad Oeynhausen, Germany
| | - Nicolas D Verheyen
- Department of Internal Medicine, Division of Cardiology, Medical University of Graz, Graz, Austria
| | - Christian Trummer
- Department of Internal Medicine, Division of Endocrinology and Diabetology, Medical University of Graz, Graz, Austria
| | - Verena Theiler-Schwetz
- Department of Internal Medicine, Division of Endocrinology and Diabetology, Medical University of Graz, Graz, Austria
| | - Martin H Keppel
- Department of Laboratory Medicine, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Oliver Malle
- Department of Internal Medicine, Division of Endocrinology and Diabetology, Medical University of Graz, Graz, Austria
| | - Georg Richtig
- Otto Loewi Research Center, Pharmacology Section, Medical University of Graz, Graz, Austria; Department of Oncology, Medical University of Graz, Graz, Austria
| | - Stephanie Gängler
- Centre on Aging and Mobility, University Hospital Zurich, Waid City Hospital, and University of Zurich, Zurich, Switzerland
| | - Heike Bischoff-Ferrari
- Centre on Aging and Mobility, University Hospital Zurich, Waid City Hospital, and University of Zurich, Zurich, Switzerland
| | - Hubert Scharnagl
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Andreas Meinitzer
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Winfried März
- Synlab Academy, Synlab Services GmbH, Mannheim, Germany; Vth Department of Medicine, (Nephrology, Hypertensiology, Rheumatology, Endocrinology, Diabetology), Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | | | - Stefan Pilz
- Department of Internal Medicine, Division of Endocrinology and Diabetology, Medical University of Graz, Graz, Austria
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Segovia-Ortí R, Barceló Bennasar A, De Sotto-Esteban D, Sanchís Cortés P, Pons J. Association between vitamin D status and allergen sensitization in pediatric subjects in the Balearic Islands. Pediatr Allergy Immunol 2021; 32:1183-1189. [PMID: 33811785 DOI: 10.1111/pai.13513] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 03/25/2021] [Accepted: 03/30/2021] [Indexed: 01/23/2023]
Abstract
INTRODUCTION Vitamin D has known effects on the immune system, and its deficiency has been associated with allergen sensitization. MATERIAL AND METHODS A retrospective study was performed to evaluate the association between 25(OH)vitamin D (25(OH)D) and specific IgE for the most frequent allergens in our area in children and adolescents. All subjects under 15 years of age with a determination of Phadiatop® or Phadiatop Infant® and close serum 25(OH)D determination were included, from 2012 to 2019. From this sample, demographic and analytical variables were collected: specific IgE to Dermatophagoides pteronyssinus; dog and cat dander; grass, olive, and pellitory pollens; egg white; and cow milk; as well as complete blood count analysis and immunoglobulins. RESULTS A total of 749 subjects were recruited. Clusters according to deficiency, insufficiency, or sufficiency of 25(OH)D showed an association with age, Phadiatop® , D. pteronyssinus, cat and dog dander specific IgE, and a higher frequency of positive allergen sensitization (P < .05). Logistic regression, compared with vitamin D levels of greater than 30 ng/mL after age adjustment, showed that deficient 25(OH)D was associated with D. pteronyssinus (OR 1.90; 95% CI, 1.25-2.90) and dog dander (OR, 2.10; 1.10-4.02); whereas insufficient 25(OH)D was associated with cat dander (OR, 2.46; 1.15-5.28) and also with D. pteronyssinus (OR, 1.55; 1.06-2.29) (P < .05). No associations were found between 25(OH) D levels and other analytical parameters. CONCLUSION Vitamin D status is associated with sensitization to D. pteronyssinus, and cat and dog dander in children and adolescents, and also with a higher number of positive specific IgE.
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Affiliation(s)
- Raquel Segovia-Ortí
- Department of Pediatrics, Son Espases University Hospital, Palma of Majorca, Spain
| | | | | | - Pilar Sanchís Cortés
- Department of Chemistry, University of the Balearic Islands, Palma of Majorca, Spain
| | - Jaime Pons
- Department of Immunology, Son Espases University Hospital, Palma of Majorca, Spain
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Patchen BK, Clark AG, Gaddis N, Hancock DB, Cassano PA. Genetically predicted serum vitamin D and COVID-19: a Mendelian randomisation study. BMJ Nutr Prev Health 2021; 4:213-225. [PMID: 34308129 PMCID: PMC8098235 DOI: 10.1136/bmjnph-2021-000255] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 04/09/2021] [Accepted: 04/10/2021] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVES To investigate causality of the association of serum vitamin D with the risk and severity of COVID-19 infection. DESIGN Two-sample Mendelian randomisation study. SETTING Summary data from genome-wide analyses in the population-based UK Biobank and SUNLIGHT Consortium, applied to meta-analysed results of genome-wide analyses in the COVID-19 Host Genetics Initiative. PARTICIPANTS 17 965 COVID-19 cases including 11 085 laboratory or physician-confirmed cases, 7885 hospitalised cases and 4336 severe respiratory cases, and 1 370 547 controls, primarily of European ancestry. EXPOSURES Genetically predicted variation in serum vitamin D status, instrumented by genome-wide significant single nucleotide polymorphisms (SNPs) associated with serum vitamin D or risk of vitamin D deficiency/insufficiency. MAIN OUTCOME MEASURES Susceptibility to and severity of COVID-19 infection, including severe respiratory infection and hospitalisation. RESULTS Mendelian randomisation analysis, sufficiently powered to detect effects comparable to those seen in observational studies, provided little to no evidence for an effect of genetically predicted serum vitamin D on susceptibility to or severity of COVID-19 infection. Using SNPs in loci related to vitamin D metabolism as genetic instruments for serum vitamin D concentrations, the OR per SD higher serum vitamin D was 1.04 (95% CI 0.92 to 1.18) for any COVID-19 infection versus population controls, 1.05 (0.84 to 1.31) for hospitalised COVID-19 versus population controls, 0.96 (0.64 to 1.43) for severe respiratory COVID-19 versus population controls, 1.15 (0.99 to 1.35) for COVID-19 positive versus COVID-19 negative and 1.44 (0.75 to 2.78) for hospitalised COVID-19 versus non-hospitalised COVID-19. Results were similar in analyses using SNPs with genome-wide significant associations with serum vitamin D (ie, including SNPs in loci with no known relationship to vitamin D metabolism) and in analyses using SNPs with genome-wide significant associations with risk of vitamin D deficiency or insufficiency. CONCLUSIONS These findings suggest that genetically predicted differences in long-term vitamin D nutritional status do not causally affect susceptibility to and severity of COVID-19 infection, and that associations observed in previous studies may have been driven by confounding. These results do not exclude the possibility of low-magnitude causal effects or causal effects of acute responses to therapeutic doses of vitamin D.
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Affiliation(s)
- Bonnie K Patchen
- Division of Nutritional Sciences, Cornell University, Ithaca, New York, USA
| | - Andrew G Clark
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, USA
| | - Nathan Gaddis
- GenOmics, Bioinformatics and Translational Research Center, Research Triangle Institute, Research Triangle Park, North Carolina, USA
| | - Dana B Hancock
- GenOmics, Bioinformatics and Translational Research Center, Research Triangle Institute, Research Triangle Park, North Carolina, USA
| | - Patricia A Cassano
- Division of Nutritional Sciences, Cornell University, Ithaca, New York, USA
- Population Health Sciences, Weill Cornell Medical College, New York, New York, USA
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Sun JY, Zhang H, Zhang Y, Wang L, Sun BL, Gao F, Liu G. Impact of serum calcium levels on total body bone mineral density: A mendelian randomization study in five age strata. Clin Nutr 2021; 40:2726-2733. [PMID: 33933738 DOI: 10.1016/j.clnu.2021.03.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 03/01/2021] [Accepted: 03/09/2021] [Indexed: 12/14/2022]
Abstract
BACKGROUND & AIMS Mendelian randomization (MR) studies have reported the causal association between serum calcium levels and bone mineral density (BMD). The results showed that genetically increased serum calcium levels in individuals with normal calcium levels did not increase BMD and could even reduce BMD. However, whether there are differences in the association between serum calcium and BMD in different age strata remains unclear. METHODS We selected eight serum calcium genetic variants with genome-wide significance (P < 5.00E-08) as the potential instrumental variables. We conducted an MR analysis to evaluate the impact of serum calcium levels on total body BMD in five age strata, 0-15, 15-30, 30-45, 45-60, and ≥60 years, using large-scale serum calcium (61,079 individuals) and total body BMD genome-wide association study (66,628 individuals) datasets. For pleiotropy analysis, we used a manual method and four common statistical methods, namely the MR-Egger intercept, MR-PRESSO, heterogeneity, and Steiger filtering tests. For MR analysis, we selected four MR methods, namely inverse-variance weighted, weighted median, MR-Egger, and MR-PRESSO. In addition to the univariable MR analysis, we conducted a multivariate MR analysis taking into account the effect of serum parathyroid hormone levels. RESULTS Univariable MR analysis using the inverse-variance weighted method indicated that per 0.5-mg/dL increase (about 1 standard deviation) in serum calcium levels was statistically significantly associated with reduced total body BMD only in the ≥60 years stratum (effect estimate (beta) = -0.545, 95% confidence interval (CI): -0.892 to -0.198, P = 0.002). The weighted median regression (beta = -0.446, 95% CI: -0.821 to -0.094, P = 1.40E-02) and MR-PRESSO (beta = -0.545, 95% CI: -0.892 to -0.198, P = 0.022) MR methods further supported this suggestive association. The multivariable MR analysis also found a significant association between increased serum calcium levels and reduced total body BMD in the ≥60 years stratum (beta = -0.547, 95% CI: -0.934 to -0.16, P = 0.006). CONCLUSIONS Our results provide genetic evidence that increased serum calcium levels did not improve BMD in the general population and that the elevated serum calcium levels in generally healthy populations, especially in adults older than 60 years, may even reduce the BMD. Our results are comparable with those of recent MR findings.
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Affiliation(s)
- Jing-Yi Sun
- Shandong Provincial Hospital, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250021, China
| | - Haihua Zhang
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, 100069, China
| | - Yan Zhang
- Department of Pathology, The Affiliated Hospital of Weifang Medical University, Weifang, 261053, China
| | - Longcai Wang
- Department of Anesthesiology, The Affiliated Hospital of Weifang Medical University, Weifang, 261053, China
| | - Bao-Liang Sun
- Key Laboratory of Cerebral Microcirculation in Universities of Shandong, Department of Neurology, Second Affiliated Hospital, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, 271000, Shandong, China
| | - Feng Gao
- Department of Trauma and Emergency Surgeon, The Second Affiliated Hospital, Harbin Medical University, Harbin, China.
| | - Guiyou Liu
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, 100069, China; Key Laboratory of Cerebral Microcirculation in Universities of Shandong, Department of Neurology, Second Affiliated Hospital, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, 271000, Shandong, China; National Engineering Laboratory of Internet Medical Diagnosis and Treatment Technology, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China; Beijing Key Laboratory of Hypoxia Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China.
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The causal role of circulating vitamin D concentrations in human complex traits and diseases: a large-scale Mendelian randomization study. Sci Rep 2021; 11:184. [PMID: 33420236 PMCID: PMC7794542 DOI: 10.1038/s41598-020-80655-w] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 12/21/2020] [Indexed: 01/29/2023] Open
Abstract
Vitamin D has been associated with a variety of human complex traits and diseases in observational studies, but a causal relationship remains unclear. To examine a putative causal effect of vitamin D across phenotypic domains and disease categories, we conducted Mendelian randomization (MR) analyses using genetic instruments associated with circulating 25-hydroxyvitamin D [25(OH)D] concentrations. We leveraged genome-wide significant 25(OH)D-associated SNPs (N = 138) from a meta-analysis combining a vitamin D GWAS conducted in 401,460 white British UK Biobank (UKBB) participants and an independent vitamin D GWAS including 42,274 samples of European ancestry, and examined 190 large-scale health-related GWAS spanning a broad spectrum of complex traits, diseases and biomarkers. We applied multiple MR methods to estimate the causal effect of vitamin D while testing and controlling for potential biases from horizontal pleiotropy. Consistent with previous findings, genetically predicted increased 25(OH)D levels significantly decreased the risk of multiple sclerosis (OR = 0.824; 95% CI 0.689-0.986). The protective effect estimate was consistent across different MR methods and four different multiple sclerosis GWAS with varying sample sizes and genotyping platforms. On the contrary, we found limited evidence in support of a causal effect of 25(OH)D on anthropometric traits, obesity, cognitive function, sleep behavior, breast and prostate cancer, and autoimmune, cardiovascular, metabolic, neurological and psychiatric traits and diseases, and blood biomarkers. Our results may inform ongoing and future randomized clinical trials of vitamin D supplementation.
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Brown SJ. What Have We Learned from GWAS for Atopic Dermatitis? J Invest Dermatol 2021; 141:19-22. [DOI: 10.1016/j.jid.2020.05.100] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/08/2020] [Accepted: 05/10/2020] [Indexed: 12/11/2022]
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Jolliffe DA, Stefanidis C, Wang Z, Kermani NZ, Dimitrov V, White JH, McDonough JE, Janssens W, Pfeffer P, Griffiths CJ, Bush A, Guo Y, Christenson S, Adcock IM, Chung KF, Thummel KE, Martineau AR. Vitamin D Metabolism Is Dysregulated in Asthma and Chronic Obstructive Pulmonary Disease. Am J Respir Crit Care Med 2020; 202:371-382. [PMID: 32186892 DOI: 10.1164/rccm.201909-1867oc] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Rationale: Vitamin D deficiency is common in patients with asthma and chronic obstructive pulmonary disease (COPD). Low 25-hydroxyvitamin D (25[OH]D) levels may represent a cause or a consequence of these conditions.Objectives: To determine whether vitamin D metabolism is altered in asthma or COPD.Methods: We conducted a longitudinal study in 186 adults to determine whether the 25(OH)D response to six oral doses of 3 mg vitamin D3, administered over 1 year, differed between those with asthma or COPD versus control subjects. Serum concentrations of vitamin D3, 25(OH)D3, and 1α,25-dihydroxyvitamin D3 (1α,25[OH]2D3) were determined presupplementation and postsupplementation in 93 adults with asthma, COPD, or neither condition, and metabolite-to-parent compound molar ratios were compared between groups to estimate hydroxylase activity. Additionally, we analyzed 14 datasets to compare expression of 1α,25(OH)2D3-inducible gene expression signatures in clinical samples taken from adults with asthma or COPD versus control subjects.Measurements and Main Results: The mean postsupplementation 25(OH)D increase in participants with asthma (20.9 nmol/L) and COPD (21.5 nmol/L) was lower than in control subjects (39.8 nmol/L; P = 0.001). Compared with control subjects, patients with asthma and COPD had lower molar ratios of 25(OH)D3-to-vitamin D3 and higher molar ratios of 1α,25(OH)2D3-to-25(OH)D3 both presupplementation and postsupplementation (P ≤ 0.005). Intergroup differences in 1α,25(OH)2D3-inducible gene expression signatures were modest and variable if statistically significant.Conclusions: Attenuation of the 25(OH)D response to vitamin D supplementation in asthma and COPD associated with reduced molar ratios of 25(OH)D3-to-vitamin D3 and increased molar ratios of 1α,25(OH)2D3-to-25(OH)D3 in serum, suggesting that vitamin D metabolism is dysregulated in these conditions.
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Affiliation(s)
- David A Jolliffe
- Asthma UK Centre for Applied Research, Institute of Population Health Sciences, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Christos Stefanidis
- Asthma UK Centre for Applied Research, Institute of Population Health Sciences, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Zhican Wang
- Department of Pharmaceutics, University of Washington, Seattle, Washington
| | | | - Vassil Dimitrov
- Department of Physiology, McGill University, Montreal, Quebec, Canada
| | - John H White
- Department of Physiology, McGill University, Montreal, Quebec, Canada
| | | | - Wim Janssens
- Laboratory of Respiratory Diseases and Thoracic Surgery, Department of Chronic Diseases, Metabolism and Ageing, Katholieke Universiteit Leuven, Leuven, Belgium; and
| | - Paul Pfeffer
- Asthma UK Centre for Applied Research, Institute of Population Health Sciences, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Christopher J Griffiths
- Asthma UK Centre for Applied Research, Institute of Population Health Sciences, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Andrew Bush
- National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Yike Guo
- Data Science Institute, William Penney Laboratory and
| | - Stephanie Christenson
- Division of Pulmonary, Critical Care, Allergy, & Sleep Medicine, Department of Medicine, University of California, San Francisco, California
| | - Ian M Adcock
- National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Kian Fan Chung
- National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Kenneth E Thummel
- Department of Pharmaceutics, University of Washington, Seattle, Washington
| | - Adrian R Martineau
- Asthma UK Centre for Applied Research, Institute of Population Health Sciences, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
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Drodge DR, Budu-Aggrey A, Paternoster L. Causal Analysis Shows Evidence of Atopic Dermatitis Leading to an Increase in Vitamin D Levels. J Invest Dermatol 2020; 141:1339-1341. [PMID: 33069727 PMCID: PMC8050017 DOI: 10.1016/j.jid.2020.09.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 09/08/2020] [Accepted: 09/20/2020] [Indexed: 01/05/2023]
Affiliation(s)
- Daniel R Drodge
- Medical Research Council Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, United Kingdom; University Hospitals Bristol NHS Foundation Trust, Bristol, United Kingdom
| | - Ashley Budu-Aggrey
- Medical Research Council Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, United Kingdom; Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom.
| | - Lavinia Paternoster
- Medical Research Council Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, United Kingdom; Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
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Abstract
Purpose The goal of this review is to provide an update in the field of vitamin D, in particular, the role of vitamin D in non-skeletal health, the complexity of providing patient guidance regarding obtaining sufficient vitamin D, and the possible involvement of vitamin D in morbidity and mortality due to SARS-CoV-2 (COVID-19). Recent Findings In addition to bone health, vitamin D may play a role in innate immunity, cardiovascular disease, and asthma. Although rickets is often regarded as an historical disease of the early twentieth century, it appears to be making a comeback worldwide, including “first-world” countries. Broad-spectrum sunscreens (with high UVA filters) that prevent erythema are unlikely to compromise vitamin D status in healthy populations. Summary New attention is now focused on the role of vitamin D in a variety of diseases, and more individualized patient recommendation schemes are being considered that take into account more realistic and achievable goals for achieving sufficient vitamin D through diet, supplements, and sun behavior.
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Feng Q, Bønnelykke K, Ek WE, Chawes BL, Yuan S, Cheung CL, Li GH, Leung RY, Cheung BM. Null association between serum 25-hydroxyvitamin D levels with allergic rhinitis, allergic sensitization and non-allergic rhinitis: A Mendelian randomization study. Clin Exp Allergy 2020; 51:78-86. [PMID: 32949071 DOI: 10.1111/cea.13739] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 08/03/2020] [Accepted: 09/02/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND Previous observational studies have not found a conclusive association between serum 25-hydroxyvitamin D (25(OH)D) levels and allergic rhinitis (AR) or allergic sensitization (AS). OBJECTIVE To investigate a causal association between 25(OH)D levels with risk of AR and AS, using a two-sample Mendelian randomization (MR) approach. METHODS Seven single nucleotide polymorphisms (SNPs), previously shown to be associated with serum 25(OH)D levels, were identified as instrumental variables. The primary outcome was AR, and the secondary outcomes were AS and non-allergic rhinitis (NAR). The genome-wide association (GWA) summary statistics of the outcomes were obtained from two cohort studies (EAGLE Consortium and UK Biobank). An MR analysis with random-effects inverse-variance weighted method was performed as the primary analysis to estimate overall effect size (odds ratio [OR] and 95% confidence interval [CI]). Sensitivity analysis using weighted median method and MR-Egger regression method was conducted. A subgroup analysis based on 25(OH)D synthesis-related SNPs was further applied. RESULTS Serum 25(OH)D levels were not causally associated with risk of AR (OR: 0.960; 95% CI: 0.779-1.184), AS (OR: 1.059; 95% CI: 0.686 to 1.634) or NAR (OR: 0.937; 95% CI: 0.588-1.491). Subgroup analysis also showed null association between 25(OH)D synthesis-related SNPs and the outcomes. Sensitivity analyses yielded similar results. CONCLUSIONS AND CLINICAL RELEVANCE This MR study found no evidence supporting a causal association between serum 25(OH)D levels and risk of AR, AS and NAR in European-ancestry population. This argues against the previous postulation that vitamin D supplementation is effective in prevention of allergic diseases.
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Affiliation(s)
- Qi Feng
- Division of Clinical Pharmacology and Therapeutics, Department of Medicine, LKS Faculty of Medicine, Queen Mary Hospital, the University of Hong Kong, Pokfulam, Hong Kong, China
| | - Klaus Bønnelykke
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Weronica E Ek
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Bo L Chawes
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Shuai Yuan
- Unit of Cardiovascular and Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - Ching Lung Cheung
- Department of Pharmacology and Pharmacy, LKS Faculty of Medicine, Queen Mary Hospital, the University of Hong Kong, Pokfulam, Hong Kong, China.,Centre for Genomic Sciences, LKS Faculty of Medicine, the University of Hong Kong, Pokfulam, Hong Kong
| | - Gloria Hy Li
- Department of Pharmacology and Pharmacy, LKS Faculty of Medicine, Queen Mary Hospital, the University of Hong Kong, Pokfulam, Hong Kong, China
| | - Raymond Yh Leung
- Division of Clinical Pharmacology and Therapeutics, Department of Medicine, LKS Faculty of Medicine, Queen Mary Hospital, the University of Hong Kong, Pokfulam, Hong Kong, China.,Department of Pharmacology and Pharmacy, LKS Faculty of Medicine, Queen Mary Hospital, the University of Hong Kong, Pokfulam, Hong Kong, China
| | - Bernard My Cheung
- Division of Clinical Pharmacology and Therapeutics, Department of Medicine, LKS Faculty of Medicine, Queen Mary Hospital, the University of Hong Kong, Pokfulam, Hong Kong, China.,State Key Laboratory of Pharmaceutical Biotechnology, the University of Hong Kong, Pokfulam, Hong Kong, China.,Institute of Cardiovascular Science and Medicine, the University of Hong Kong, Pokfulam, Hong Kong, China
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Wang Y, Gao L, Lang W, Li H, Cui P, Zhang N, Jiang W. Serum Calcium Levels and Parkinson's Disease: A Mendelian Randomization Study. Front Genet 2020; 11:824. [PMID: 32849817 PMCID: PMC7431982 DOI: 10.3389/fgene.2020.00824] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 07/08/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Though increasing epidemiological studies have evaluated the correlation between serum calcium contents and Parkinson's disease (PD), the results are inconsistent. At present, whether there is a causal association between serum calcium content and PD remains undetermined. OBJECTIVE AND METHODS This study was designed to explore the relationship between increased serum calcium contents and PD risk. In this present study, a Mendelian randomization trial was carried out using a large-scale serum calcium genome-wide association study (GWAS) dataset (N = 61,079, Europeans) and a large-scale PD GWAS dataset (N = 8,477, Europeans including 4,238 PD patients and 4,239 controls). Here, a total of four Mendelian randomization methods comprising weighted median, inverse-variance weighted meta-analysis (IVW), MR-Egger, and MR-PRESSO were used. RESULTS Our data concluded that genetically higher serum calcium contents were not significantly related to PD. CONCLUSION In conclusion, we provided genetic evidence that there was no direct causal relationship between serum calcium contents and PD. Hence, calcium supplementation may not result in reduced PD risk.
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Affiliation(s)
- Yanchao Wang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
- Department of Neurology, Affiliated Hospital of Chifeng University, Chifeng, China
| | - Luyan Gao
- Department of Neurology, The Fourth Central Clinical College of Tianjin Medical University, Tianjin, China
| | - Wenjing Lang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - He Li
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Pan Cui
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Nan Zhang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Wei Jiang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
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Heiskanen V, Pfiffner M, Partonen T. Sunlight and health: shifting the focus from vitamin D3 to photobiomodulation by red and near-infrared light. Ageing Res Rev 2020; 61:101089. [PMID: 32464190 DOI: 10.1016/j.arr.2020.101089] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/10/2020] [Accepted: 05/14/2020] [Indexed: 12/14/2022]
Abstract
Both sun exposure and serum vitamin D levels have been associated with lower risks of all-cause mortality and chronic age-related diseases, e.g., cancer, diabetes and cardiovascular disease, in epidemiological studies. These associations have mainly been ascribed to beneficial effects of vitamin D. However, a vast body of randomized controlled trials (RCTs) and Mendelian randomization studies have failed to confirm any major health benefits from vitamin D supplementation. In this review, we present tentative evidence showing that red and near-infrared light, both being present in sunlight, could explain the associations between sunlight exposure and better health status. Body irradiation with red and near-infrared light, usually termed as photobiomodulation (PBM), has demonstrated beneficial effects in animal models of chronic diseases. Beyond this, preliminary evidence from RCTs suggest potential clinical benefit from PBM for chronic diseases. PBM is currently being investigated in many pre-registered clinical trials, results of which will eventually clarify the role of red and near-infrared light in the prevention and treatment of common age-related chronic diseases.
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Abstract
Atopic dermatitis is associated with an increased risk of asthma (10 to 30% according to age), allergic rhinitis and conjunctivitis and food allergy. Other comorbidiies are globally lest frequent than in psoriasis. There is no increased risk of solid cancer. Smoking is a major confounding factor that has to be taken into account. Obesity and metabolic syndrome are more frequent and there is a moderately increased cardiovascular risk in severe forms of atopic dermatitis. There is a clear-cut increased risk of vitiligo and alopecia areata and a lower risk of other auto-immune diseases, including type I diabetes in children. There is a higher risk of cutaneous but not extra-cutaneous bacterial and viral infections, and increased frequency of contact dermatitis and urticaria. Severe atopic dermatitis is associated with psychiatric comorbidities, like attention disorders/hyperactivity, depression and suicidal ideas. © 2019 Elsevier Masson SAS. All rights reserved.
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Affiliation(s)
- B Cribier
- Clinique dermatologique, Hôpitaux universitaires et université de Strasbourg, 1, place de l'Hôpital, 67091 Strasbourg Cedex, France.
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40
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Cho YS, Seo CH, Joo SY, Ohn SH. The association between vitamin D levels and burn factors in different burn types. BURNS & TRAUMA 2020; 8:tkaa018. [PMID: 32607374 PMCID: PMC7306415 DOI: 10.1093/burnst/tkaa018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 02/10/2020] [Accepted: 04/08/2020] [Indexed: 02/06/2023]
Abstract
Background Patients with burns present with different clinical features depending on the types of burn injury and burn patients with lower levels of vitamin D have worse prognoses and more complications. The study aims to investigate the association between vitamin D levels and burn factors according to each burn type in relation to early intensive rehabilitation therapy initiated for inpatients with burns. Methods In this retrospective study, we enrolled 757 of 1716 inpatients who underwent rehabilitative therapy between May 2013 and April 2017. Burn types were divided into flame burn, electrical burn and other burns, including scalding, contact and chemical burns. Age, burned body surface area (BSA), wound healing time (WHT), length of hospital stay (LOS) and body mass index were analysed between vitamin D deficient and non-deficient patient groups using Student’s t-tests, or Mann-Whitney U test and among three burn types using one-way analysis of variance (ANOVA) or Kruskal-Wallis one-way ANOVA. The relationship between vitamin D levels and burn factors was evaluated using Pearson's or Spearman's correlation coefficient tests, and multiple linear regression analysis in different burn groups. Results In total, 88.9% patients were vitamin D deficient, and these patients had a larger burned BSA (p = 0.015) and longer WHT and LOS (all p < 0.001) than non-deficient patients. Burned BSA, WHT and vitamin D levels showed significant differences in their mean values according to three burn types (all p < 0.001). WHT was a communal factor significantly associated with vitamin D levels in all three burn types (p < 0.05). The WHT cut-off points to predict vitamin D deficiency were 55 days for flame burn (p < 0.001) and 62.5 days for electrical burn (p = 0.001). Conclusions WHT across all three burn types was a common factor associated with vitamin D levels for inpatients with burns who had undergone rehabilitative therapy. Electrical burn patients with vitamin D deficiency, even those with a low burned BSA percentage, showed prolonged wound healing over a two-month post-burn period. Independent of burned BSA, nutritional intervention concerning vitamin D in relation to burn wound healing should be considered to guide early initiation of intensive rehabilitation therapy.
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Affiliation(s)
- Yoon Soo Cho
- Department of Rehabilitation Medicine, Burn Center, Hangang Sacred Heart Hospital, 94-200 Yeongdeungpo-dong, Yeongdeungpo-gu, Seoul 07247, Republic of Korea
| | - Cheong Hoon Seo
- Department of Rehabilitation Medicine, Burn Center, Hangang Sacred Heart Hospital, 94-200 Yeongdeungpo-dong, Yeongdeungpo-gu, Seoul 07247, Republic of Korea
| | - So Young Joo
- Department of Rehabilitation Medicine, Burn Center, Hangang Sacred Heart Hospital, 94-200 Yeongdeungpo-dong, Yeongdeungpo-gu, Seoul 07247, Republic of Korea
| | - Suk Hoon Ohn
- Department of Physical Medicine and Rehabilitation, Hallym University Sacred Heart Hospital, 22 Gwanpyeong-ro 170 Beon-gil Dongan-gu Anyang Gyeonggi-do 14068, Republic of Korea
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Aldaghi M, Tehrani H, Karrabi M, Abadi FS, Sahebkar M. The effect of multistrain synbiotic and vitamin D3 supplements on the severity of atopic dermatitis among infants under 1 year of age: a double-blind, randomized clinical trial study. J DERMATOL TREAT 2020; 33:812-817. [PMID: 32530339 DOI: 10.1080/09546634.2020.1782319] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Background: Atopic dermatitis (AD) is the most common chronic and recurrent skin disease during infancy.Objective: This study was aimed at evaluating the effect of synbiotic and vitamin D3 supplements on the severity of AD among infants under 1 year of age.Methods: This double-blind, randomized clinical trial study was conducted on 81 subjects with AD in Sabzevar, Iran in 2018. Subjects were randomly assigned to three groups. Synbiotic group was administered a dose of five drops/day of synbiotic in addition to routine treatment. Vitamin D3 group was administered 1000 units (IU) of vitamin D3 daily in addition to routine treatment. Control group just received routine treatments. The severity of AD was evaluated using SCORing Atopic Dermatitis (SCORAD) at baseline and two months' follow-up.Results: The mean age of subjects was 4.87 ± 3.5 and 59.26% (n = 48) were male. The mean SCOARD scores were substantially decreased in the synbiotic (bxy: -13.90, 95% CI, -20.99, -6.81; p < .001) and vitamin D3 (bxy: -12.38, 95% CI, -19.33, -5.43; p = .001) groups as compared to control one by the end of two months.Conclusions: Findings suggest that multistrain synbiotic and vitamin D3 supplements administration along with routine treatments, as complementary therapies, may be effective in reducing the severity of AD in infants.
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Affiliation(s)
- Mitra Aldaghi
- Department of Paediatric, School of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Human Tehrani
- Department of Paediatric, School of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Maryam Karrabi
- Department of Dermatology, School of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Fatemeh Sham Abadi
- Student Research Committee, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Mohammad Sahebkar
- Department of Social Medicine, School of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran
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Research Techniques Made Simple: Using Genetic Variants for Randomization. J Invest Dermatol 2020; 139:1416-1421.e1. [PMID: 31230636 DOI: 10.1016/j.jid.2019.03.1138] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 03/12/2019] [Accepted: 03/25/2019] [Indexed: 12/29/2022]
Abstract
Observational epidemiological studies have identified associations between a number of modifiable exposures and outcomes, including in dermatology, such as between smoking and psoriasis. However, it is challenging to determine if such relationships are causal because of the potential of confounding and reverse causation. Mendelian randomization (MR) is a statistical method that can be used to investigate the causal relationships between an exposure and outcome by using a genetic instrument that proxies the exposure. The resulting estimate (under certain assumptions) can be interpreted as the causal estimate, free of confounding and reverse causation. In this review, we provide an overview of how to undertake an MR analysis, with examples from the dermatology literature. We also discuss the challenges and future directions of this method.
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43
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Vitamin D and Immunity in Infants and Children. Nutrients 2020; 12:nu12051233. [PMID: 32349265 PMCID: PMC7282029 DOI: 10.3390/nu12051233] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 04/24/2020] [Accepted: 04/25/2020] [Indexed: 02/06/2023] Open
Abstract
The last couple of decades have seen an explosion in our interest and understanding of the role of vitamin D in the regulation of immunity. At the molecular level, the hormonal form of vitamin D signals through the nuclear vitamin D receptor (VDR), a ligand-regulated transcription factor. The VDR and vitamin D metabolic enzymes are expressed throughout the innate and adaptive arms of the immune system. The advent of genome-wide approaches to gene expression profiling have led to the identification of numerous VDR-regulated genes implicated in the regulation of innate and adaptive immunity. The molecular data infer that vitamin D signaling should boost innate immunity against pathogens of bacterial or viral origin. Vitamin D signaling also suppresses inflammatory immune responses that underlie autoimmunity and regulate allergic responses. These findings have been bolstered by clinical studies linking vitamin D deficiency to increased rates of infections, autoimmunity, and allergies. Our goals here are to provide an overview of the molecular basis for immune system regulation and to survey the clinical data from pediatric populations, using randomized placebo-controlled trials and meta-analyses where possible, linking vitamin D deficiency to increased rates of infections, autoimmune conditions, and allergies, and addressing the impact of supplementation on these conditions.
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Martin MJ, Estravís M, García-Sánchez A, Dávila I, Isidoro-García M, Sanz C. Genetics and Epigenetics of Atopic Dermatitis: An Updated Systematic Review. Genes (Basel) 2020; 11:E442. [PMID: 32325630 PMCID: PMC7231115 DOI: 10.3390/genes11040442] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/10/2020] [Accepted: 04/15/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Atopic dermatitis is a common inflammatory skin disorder that affects up to 15-20% of the population and is characterized by recurrent eczematous lesions with intense itching. As a heterogeneous disease, multiple factors have been suggested to explain the nature of atopic dermatitis (AD), and its high prevalence makes it necessary to periodically compile and update the new information available. In this systematic review, the focus is set at the genetic and epigenetic studies carried out in the last years. METHODS A systematic literature review was conducted in three scientific publication databases (PubMed, Cochrane Library, and Scopus). The search was restricted to publications indexed from July 2016 to December 2019, and keywords related to atopic dermatitis genetics and epigenetics were used. RESULTS A total of 73 original papers met the inclusion criteria established, including 9 epigenetic studies. A total of 62 genes and 5 intergenic regions were described as associated with AD. CONCLUSION Filaggrin (FLG) polymorphisms are confirmed as key genetic determinants for AD development, but also epigenetic regulation and other genes with functions mainly related to the immune system and extracellular matrix, reinforcing the notion of skin homeostasis breakage in AD.
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Affiliation(s)
- Maria J Martin
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (M.J.M.); (M.E.); (I.D.); (C.S.)
- Network for Cooperative Research in Health–RETICS ARADyAL, 37007 Salamanca, Spain
| | - Miguel Estravís
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (M.J.M.); (M.E.); (I.D.); (C.S.)
- Network for Cooperative Research in Health–RETICS ARADyAL, 37007 Salamanca, Spain
- Department of Biomedical and Diagnostics Sciences, University of Salamanca, 37007 Salamanca, Spain
| | - Asunción García-Sánchez
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (M.J.M.); (M.E.); (I.D.); (C.S.)
- Network for Cooperative Research in Health–RETICS ARADyAL, 37007 Salamanca, Spain
- Department of Biomedical and Diagnostics Sciences, University of Salamanca, 37007 Salamanca, Spain
| | - Ignacio Dávila
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (M.J.M.); (M.E.); (I.D.); (C.S.)
- Network for Cooperative Research in Health–RETICS ARADyAL, 37007 Salamanca, Spain
- Department of Immunoallergy, Salamanca University Hospital, 37007 Salamanca, Spain
| | - María Isidoro-García
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (M.J.M.); (M.E.); (I.D.); (C.S.)
- Network for Cooperative Research in Health–RETICS ARADyAL, 37007 Salamanca, Spain
- Department of Clinical Biochemistry, University Hospital of Salamanca, 37007 Salamanca, Spain
- Department of Medicine, University of Salamanca, 37007 Salamanca, Spain
| | - Catalina Sanz
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (M.J.M.); (M.E.); (I.D.); (C.S.)
- Network for Cooperative Research in Health–RETICS ARADyAL, 37007 Salamanca, Spain
- Department of Microbiology and Genetics, University of Salamanca, 37007 Salamanca, Spain
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Maretzke F, Bechthold A, Egert S, Ernst JB, Melo van Lent D, Pilz S, Reichrath J, Stangl GI, Stehle P, Volkert D, Wagner M, Waizenegger J, Zittermann A, Linseisen J. Role of Vitamin D in Preventing and Treating Selected Extraskeletal Diseases-An Umbrella Review. Nutrients 2020; 12:nu12040969. [PMID: 32244496 PMCID: PMC7231149 DOI: 10.3390/nu12040969] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 12/14/2022] Open
Abstract
Evidence is accumulating that vitamin D may have beneficial effects on respiratory tract, autoimmune, neuro-degenerative, and mental diseases. The present umbrella review of systematic reviews (SRs) of cohort studies and randomised controlled trials (RCTs), plus single Mendelian randomisation studies aims to update current knowledge on the potential role of vitamin D in preventing and treating these extraskeletal diseases. Altogether, 73 SRs were identified. Observational data on primary prevention suggest an inverse association between vitamin D status and the risk of acute respiratory tract infections (ARI), dementia and cognitive decline, and depression, whereas studies regarding asthma, multiple sclerosis (MS), and type 1 diabetes mellitus (T1DM) are scarce. SRs of RCTs support observational data only for the risk of ARI. No respective RCTs are available for the prevention of chronic obstructive pulmonary disease (COPD), MS, and T1DM. SRs of RCTs indicate beneficial therapeutic effects in vitamin D-deficient patients with asthma and COPD, while effects on major depression and T1DM need to be further elucidated. Mendelian randomisation studies do not consistently support the results of SRs. Since several limitations of the included SRs and existing RCTs do not permit definitive conclusions regarding vitamin D and the selected diseases, further high-quality RCTs are warranted.
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Affiliation(s)
- Friederike Maretzke
- German Nutrition Society, 53175 Bonn, Germany; (F.M.); (A.B.); (J.B.E.); (J.L.)
| | - Angela Bechthold
- German Nutrition Society, 53175 Bonn, Germany; (F.M.); (A.B.); (J.B.E.); (J.L.)
| | - Sarah Egert
- Institute of Nutritional Medicine, University of Hohenheim, 70599 Stuttgart, Germany;
| | - Jana B. Ernst
- German Nutrition Society, 53175 Bonn, Germany; (F.M.); (A.B.); (J.B.E.); (J.L.)
| | - Debora Melo van Lent
- Glenn Biggs Institute for Alzheimer’s and Neurodegenerative Diseases, University of Texas Health Sciences Center, San Antonio, TX 78229, USA;
| | - Stefan Pilz
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, 8036 Graz, Austria;
| | - Jörg Reichrath
- Department of Adult and Pediatric Dermatology, Venereology, Allergology, University Hospital Saarland, 66424 Homburg, Germany;
| | - Gabriele I. Stangl
- Institute for Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany;
| | - Peter Stehle
- Department of Nutrition and Food Sciences, University of Bonn, 53115 Bonn, Germany;
| | - Dorothee Volkert
- Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg, 90408 Nuremberg, Germany;
| | - Michael Wagner
- Department for Neurodegenerative Diseases and Geriatric Psychiatry, University Hospital Bonn, 53127 Bonn, Germany;
| | - Julia Waizenegger
- German Nutrition Society, 53175 Bonn, Germany; (F.M.); (A.B.); (J.B.E.); (J.L.)
- Correspondence: ; Tel.: +49-228-3776-628
| | - Armin Zittermann
- Clinic for Thoracic and Cardiovascular Surgery, Heart and Diabetes Center North Rhine-Westphalia, 32545 Bad Oeynhausen, Germany;
| | - Jakob Linseisen
- German Nutrition Society, 53175 Bonn, Germany; (F.M.); (A.B.); (J.B.E.); (J.L.)
- University Center of Health Sciences at Klinikum Augsburg (UNIKA-T), Ludwig Maximilian University of Munich, 86156 Augsburg, Germany
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46
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Guo Y, Yu L, Deng YH, Ke HJ, Wu JL. Associations between serum 25-hydroxyvitamin D levels and allergic sensitization in early childhood. Allergol Immunopathol (Madr) 2020; 48:84-89. [PMID: 31601504 DOI: 10.1016/j.aller.2019.06.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 06/26/2019] [Accepted: 06/27/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND OBJECTIVES Vitamin D status may be related to allergen sensitizations, but the evidence is inconsistent. The objective of this study was to assess whether serum 25-hydroxyvitamin D (25(OH)D) levels were associated with allergic sensitizations in early childhood. METHODS Data were collected from 2642 children who visited the Guangdong Women and Children's Hospital from January 2016 to May 2017 for routine health check-ups. Serum 25(OH)D levels were tested by electrochemiluminescence immunoassay. Allergic sensitizations including food and inhalant allergens were tested for specific IgE antibodies at one year (12 months 0 days through 12 months 30 days) and two years (24 months 0 days through 24 months 30 days) of age. RESULTS The mean level of serum 25(OH)D was 86.47±27.55nmol/L, with a high prevalence of vitamin D insufficiency (<75nmol/L) in children aged 0-2 years (36.8%). Lower 25(OH)D levels with serum total IgE of more than 200IU/mL (81.54±25.53nmol/L) compared with less than 100IU/mL (87.92±28.05nmol/L). The common sensitization to allergens in children aged one and two years were milk (44.2%), cat epithelium (26.4%), egg (13.1%), dog epithelium (12.7%) and Dermatophagoides farinae (6.7%). After multivariate adjustment, data in 25(OH)D treated as a continuous variable or categories, no consistent associations were found between 25(OH)D levels and allergen-specific IgEs. CONCLUSIONS Serum 25(OH)D level showed an inverse relationship with total IgE level in early childhood. However, there is lack of evidence to support associations between low 25(OH)D levels and allergic sensitization to various allergens.
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Affiliation(s)
- Y Guo
- Department of Children's Health Care, Guangdong Women and Children Hospital, Guangzhou Medical University, Guangzhou 511400, China
| | - L Yu
- Department of Children's Health Care, Guangdong Women and Children Hospital, Guangzhou Medical University, Guangzhou 511400, China
| | - Y-H Deng
- School of Public Health, Southern Medical University, Guangzhou 510515, Guangdong, China
| | - H-J Ke
- Department of Children's Health Care, Guangdong Women and Children Hospital, Guangzhou Medical University, Guangzhou 511400, China
| | - J-L Wu
- Department of Children's Health Care, Guangdong Women and Children Hospital, Guangzhou Medical University, Guangzhou 511400, China.
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47
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Wei J, Ji JS. Association of Serum Vitamins with Eczema in US Adults (NHANES 2005-2006). Dermatology 2019; 236:179-182. [PMID: 31533110 DOI: 10.1159/000502642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Accepted: 08/08/2019] [Indexed: 11/19/2022] Open
Affiliation(s)
- Jia Wei
- Environmental Research Center, Duke Kunshan University, Kunshan, China
| | - John S Ji
- Environmental Research Center, Duke Kunshan University, Kunshan, China, .,Nicholas School of the Environment, Duke University, Durham, North Carolina, USA,
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48
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Abstract
Vitamin D plays an essential role in human health as it influences immune function, cell proliferation, differentiation and apoptosis. Vitamin D deficiency has been associated with numerous health outcomes, including bone disease, cancer, autoimmune disease, cardiovascular conditions and more. However, the causal role of vitamin D beyond its importance for bone health remains unclear and is under much debate. Twin and familial studies from past decades have demonstrated a nontrivial heritability of circulating vitamin D concentrations. Several large-scale genome-wide association studies (GWAS) have discovered associations of GC, NADSYN1/DHCR7, CYP2R1, CYP24A1, SEC23A, AMDHD1 with serum levels of vitamin D. A recent whole genome sequencing (WGS) study, combined with deep imputation of genome-wide genotyping, has identified a low-frequency synonymous coding variant at CYP2R1. Information on these genetic variants can be used as tools for downstream analysis such as Mendelian randomization. Here, we review the genetic determinants of circulating vitamin D levels by focusing on new findings from GWAS and WGS, as well as results from Mendelian randomization analyses conducted so far for vitamin D with various traits and diseases. The amount of variation in vitamin D explained by genetics is still small, and the putative causal relationship between vitamin D and other diseases remains to be demonstrated.
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Affiliation(s)
- Xia Jiang
- Program in Genetic Epidemiology, Harvard T.H. Chan School of Public Health, 677 Huntington Ave, Brookline, Boston 02115, USA; Unit of Cardiovascular Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Nobels vagen 13, Stockholm 17177, Sweden.
| | - Douglas P Kiel
- Institute for Aging Research, Hebrew SeniorLife, 1200 Centre Street, Boston, MA 02131, United States; Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, United States; Broad Institute of Harvard and Massachusetts Institute of Technology, Boston, MA 02142, United States
| | - Peter Kraft
- Program in Genetic Epidemiology, Harvard T.H. Chan School of Public Health, 677 Huntington Ave, Brookline, Boston 02115, USA
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Bouillon R, Marcocci C, Carmeliet G, Bikle D, White JH, Dawson-Hughes B, Lips P, Munns CF, Lazaretti-Castro M, Giustina A, Bilezikian J. Skeletal and Extraskeletal Actions of Vitamin D: Current Evidence and Outstanding Questions. Endocr Rev 2019; 40:1109-1151. [PMID: 30321335 PMCID: PMC6626501 DOI: 10.1210/er.2018-00126] [Citation(s) in RCA: 530] [Impact Index Per Article: 106.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 07/17/2018] [Indexed: 02/06/2023]
Abstract
The etiology of endemic rickets was discovered a century ago. Vitamin D is the precursor of 25-hydroxyvitamin D and other metabolites, including 1,25(OH)2D, the ligand for the vitamin D receptor (VDR). The effects of the vitamin D endocrine system on bone and its growth plate are primarily indirect and mediated by its effect on intestinal calcium transport and serum calcium and phosphate homeostasis. Rickets and osteomalacia can be prevented by daily supplements of 400 IU of vitamin D. Vitamin D deficiency (serum 25-hydroxyvitamin D <50 nmol/L) accelerates bone turnover, bone loss, and osteoporotic fractures. These risks can be reduced by 800 IU of vitamin D together with an appropriate calcium intake, given to institutionalized or vitamin D-deficient elderly subjects. VDR and vitamin D metabolic enzymes are widely expressed. Numerous genetic, molecular, cellular, and animal studies strongly suggest that vitamin D signaling has many extraskeletal effects. These include regulation of cell proliferation, immune and muscle function, skin differentiation, and reproduction, as well as vascular and metabolic properties. From observational studies in human subjects, poor vitamin D status is associated with nearly all diseases predicted by these extraskeletal actions. Results of randomized controlled trials and Mendelian randomization studies are supportive of vitamin D supplementation in reducing the incidence of some diseases, but, globally, conclusions are mixed. These findings point to a need for continued ongoing and future basic and clinical studies to better define whether vitamin D status can be optimized to improve many aspects of human health. Vitamin D deficiency enhances the risk of osteoporotic fractures and is associated with many diseases. We review what is established and what is plausible regarding the health effects of vitamin D.
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Affiliation(s)
- Roger Bouillon
- Laboratory of Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism and Ageing, KU Leuven, Belgium
| | - Claudio Marcocci
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Geert Carmeliet
- Laboratory of Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism and Ageing, KU Leuven, Belgium
| | - Daniel Bikle
- Veterans Affairs Medical Center and University of California San Francisco, San Francisco, California
| | - John H White
- Department of Physiology, McGill University, Montreal, Quebec, Canada
| | - Bess Dawson-Hughes
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts
| | - Paul Lips
- Department of Internal Medicine, Endocrine Section, VU University Medical Center, HV Amsterdam, Netherlands
| | - Craig F Munns
- Children’s Hospital at Westmead, Sydney, New South Wales, Australia
- Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - Marise Lazaretti-Castro
- Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Andrea Giustina
- Chair of Endocrinology, Vita-Salute San Raffaele University, Milan, Italy
| | - John Bilezikian
- Department of Endocrinology, Columbia University College of Physicians and Surgeons, New York, New York
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50
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Parr CL, Magnus MC, Karlstad Ø, Holvik K, Lund-Blix NA, Haugen M, Page CM, Nafstad P, Ueland PM, London SJ, Håberg SE, Nystad W. Vitamin A and D intake in pregnancy, infant supplementation, and asthma development: the Norwegian Mother and Child Cohort. Am J Clin Nutr 2019; 107:789-798. [PMID: 29722838 DOI: 10.1093/ajcn/nqy016] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 01/17/2018] [Indexed: 12/11/2022] Open
Abstract
Background Western diets may provide excess vitamin A, which is potentially toxic and could adversely affect respiratory health and counteract benefits from vitamin D. Objective The aim of this study was to examine child asthma at age 7 y in relation to maternal intake of vitamins A and D during pregnancy, infant supplementation with these vitamins, and their potential interaction. Design We studied 61,676 school-age children (born during 2002-2007) from the Norwegian Mother and Child Cohort with data on maternal total (food and supplement) nutrient intake in pregnancy (food-frequency questionnaire validated against biomarkers) and infant supplement use at age 6 mo (n = 54,142 children). Linkage with the Norwegian Prescription Database enabled near-complete follow-up (end of second quarter in 2015) for dispensed medications to classify asthma. We used log-binomial regression to calculate adjusted RRs (aRRs) for asthma with 95% CIs. Results Asthma increased according to maternal intake of total vitamin A [retinol activity equivalents (RAEs)] in the highest (≥2031 RAEs/d) compared with the lowest (≤779 RAEs/d) quintile (aRR: 1.21; 95% CI: 1.05, 1.40) and decreased for total vitamin D in the highest (≥13.6 µg/d) compared with the lowest (≤3.5 µg/d) quintile (aRR: 0.81; 95% CI: 0.67, 0.97) during pregnancy. No association was observed for maternal intake in the highest quintiles of both nutrients (aRR: 0.99; 95% CI: 0.83, 1.18) and infant supplementation with vitamin D or cod liver oil. Conclusions Excess vitamin A (≥2.5 times the recommended intake) during pregnancy was associated with increased risk, whereas vitamin D intake close to recommendations was associated with a reduced risk of asthma in school-age children. No association for high intakes of both nutrients suggests antagonistic effects of vitamins A and D. This trial was registered at http://www.clinicaltrials.gov as NCT03197233.
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Affiliation(s)
- Christine L Parr
- Division of Mental and Physical Health.,Department of Nursing and Health Promotion, OsloMet-Oslo Metropolitan University, Oslo, Norway
| | - Maria C Magnus
- Division of Mental and Physical Health.,Medical Research Council Integrative Epidemiology Unit, University of Bristol, Bristol, United Kingdom.,Department of Population Health Sciences, Bristol Medical School, Bristol, United Kingdom
| | | | | | - Nicolai A Lund-Blix
- Division of Mental and Physical Health.,Division of Pediatric and Adolescent Medicine, Department of Pediatrics, Oslo University Hospital, Oslo, Norway
| | | | | | - Per Nafstad
- Division of Mental and Physical Health.,Department of Community Medicine, University of Oslo, Oslo, Norway
| | - Per M Ueland
- Department of Clinical Science, University of Bergen, Bergen, Norway.,Laboratory of Clinical Biochemistry, Haukeland University Hospital, Bergen, Norway
| | - Stephanie J London
- Epidemiology Branch, National Institute of Environmental Health Sciences, NIH, Department of Health and Human Services, Research Triangle Park, NC
| | - Siri E Håberg
- Division of Mental and Physical Health.,Center for Fertility and Health, Norwegian Institute of Public Health, Oslo, Norway
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