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Grieco T, Moliterni E, Paolino G, Chello C, Sernicola A, Egan CG, Nannipieri F, Battaglia S, Accoto M, Tirotta E, Trasciatti S, Bonaretti S, Nencioni S, Biasci E, Pellacani G, Calvieri S. Association between Vitamin D Receptor Polymorphisms, Tight Junction Proteins and Clinical Features of Adult Patients with Atopic Dermatitis. Dermatol Pract Concept 2024; 14:dpc.1403a214. [PMID: 39122483 PMCID: PMC11313695 DOI: 10.5826/dpc.1403a214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2024] [Indexed: 08/12/2024] Open
Abstract
INTRODUCTION Few studies have explored the intricate connections between vitamin D receptor (VDR) gene polymorphisms, VDR, tight junction (TJ) protein expression and clinical features of atopic dermatitis (AD). METHODS From 43 adult AD patients, VDR polymorphisms were genotyped from peripheral blood samples using polymerase chain reaction-restriction fragment length polymorphism. VDR, occludin, claudin-1 and ZO-1 protein expression from skin lesion biopsies were assessed by immunohistochemistry. RESULTS The A1012G heterozygous VDR polymorphism exhibited a lower odds ratio (OR) for juvenile AD onset (OR: 0.046, 95% CI 0.004-0.51, p=0.012). In contrast, the presence of ≥2 homozygous VDR polymorphisms were significantly associated with positive skin prick test (SPT) (10/20, 50%) vs. negative SPT (1/23, 4.3%; p=0.0003). The most highly expressed TJ proteins in lesions of AD patients were claudin-1 and zonulin-1 (ZO-1), while VDR and occludin were less prevalent. A significant correlation was observed between ZO-1 expression and a body mass index ≥30 kg/m2 (OR: 12.1, 95% CI 1.06-137.9, p=0.045). Claudin-1 expression was associated with a positive SPT (OR: 8.23, 95% CI 1.04-65.5, p=0.046) and serum 25(OH)D levels were negatively correlated with ZO-1 expression (rho= -0.43, p=0.0058). CONCLUSION This study provides novel insights into the relationship between VDR gene polymorphisms, VDR, TJ protein expression, and clinical features in adult AD patients, highlighting a significant role of vitamin D in the pathophysiology of this disease.
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Affiliation(s)
- Teresa Grieco
- Dermatology Clinic, Department of Clinical Internal, Anesthesiological and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Elisa Moliterni
- Dermatology Clinic, Department of Clinical Internal, Anesthesiological and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Giovanni Paolino
- Unit of Dermatology and Cosmetology, IRCCS University Vita-Salute San Raffaele, Milan, Italy
| | - Camilla Chello
- Dermatology Clinic, Department of Clinical Internal, Anesthesiological and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Alvise Sernicola
- Dermatology Clinic, Department of Clinical Internal, Anesthesiological and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | | | | | | | | | | | | | | | | | | | - Giovanni Pellacani
- Dermatology Clinic, Department of Clinical Internal, Anesthesiological and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Stefano Calvieri
- Dermatology Clinic, Department of Clinical Internal, Anesthesiological and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
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Kilic A, Halu A, De Marzio M, Maiorino E, Duvall MG, Bruggemann TR, Rojas Quintero JJ, Chase R, Mirzakhani H, Sungur AÖ, Koepke J, Nakano T, Peh HY, Krishnamoorthy N, Abdulnour RE, Georgopoulos K, Litonjua AA, Demay M, Renz H, Levy BD, Weiss ST. Vitamin D constrains inflammation by modulating the expression of key genes on Chr17q12-21.1. eLife 2024; 12:RP89270. [PMID: 38567749 PMCID: PMC10990493 DOI: 10.7554/elife.89270] [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] [Indexed: 04/05/2024] Open
Abstract
Vitamin D possesses immunomodulatory functions and vitamin D deficiency has been associated with the rise in chronic inflammatory diseases, including asthma (Litonjua and Weiss, 2007). Vitamin D supplementation studies do not provide insight into the molecular genetic mechanisms of vitamin D-mediated immunoregulation. Here, we provide evidence for vitamin D regulation of two human chromosomal loci, Chr17q12-21.1 and Chr17q21.2, reliably associated with autoimmune and chronic inflammatory diseases. We demonstrate increased vitamin D receptor (Vdr) expression in mouse lung CD4+ Th2 cells, differential expression of Chr17q12-21.1 and Chr17q21.2 genes in Th2 cells based on vitamin D status and identify the IL-2/Stat5 pathway as a target of vitamin D signaling. Vitamin D deficiency caused severe lung inflammation after allergen challenge in mice that was prevented by long-term prenatal vitamin D supplementation. Mechanistically, vitamin D induced the expression of the Ikzf3-encoded protein Aiolos to suppress IL-2 signaling and ameliorate cytokine production in Th2 cells. These translational findings demonstrate mechanisms for the immune protective effect of vitamin D in allergic lung inflammation with a strong molecular genetic link to the regulation of both Chr17q12-21.1 and Chr17q21.2 genes and suggest further functional studies and interventional strategies for long-term prevention of asthma and other autoimmune disorders.
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Affiliation(s)
- Ayse Kilic
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical SchoolBostonUnited States
| | - Arda Halu
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical SchoolBostonUnited States
| | - Margherita De Marzio
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical SchoolBostonUnited States
- Department of Environmental Health, Harvard TH Chan School of Public HealthBostonUnited States
| | - Enrico Maiorino
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical SchoolBostonUnited States
| | - Melody G Duvall
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical SchoolBostonUnited States
| | - Thayse Regina Bruggemann
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical SchoolBostonUnited States
| | - Joselyn J Rojas Quintero
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical SchoolBostonUnited States
| | - Robert Chase
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical SchoolBostonUnited States
| | - Hooman Mirzakhani
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical SchoolBostonUnited States
| | - Ayse Özge Sungur
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-UniversityMarburgGermany
- Excellence Cluster Cardio-Pulmonary System (ECCPS), Justus Liebig University GiessenGiessenGermany
| | - Janine Koepke
- Excellence Cluster Cardio-Pulmonary System (ECCPS), Justus Liebig University GiessenGiessenGermany
| | - Taiji Nakano
- Department of Pediatrics, Graduate School of Medicine, Chiba UniversityChibaJapan
| | - Hong Yong Peh
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical SchoolBostonUnited States
| | - Nandini Krishnamoorthy
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical SchoolBostonUnited States
| | - Raja-Elie Abdulnour
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical SchoolBostonUnited States
| | - Katia Georgopoulos
- Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical SchoolBostonUnited States
| | - Augusto A Litonjua
- Division of Pediatric Pulmonary Medicine, Golisano Children’s Hospital at Strong, University of Rochester Medical CenterRochesterUnited States
| | - Marie Demay
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical SchoolBostonUnited States
| | - Harald Renz
- Institute of Laboratory Medicine and Pathobiochemistry, Molecular Diagnostics, Philipps University of Marburg and German Center for Lung Research (DZL)MarburgGermany
- Department of Clinical Immunology and Allergology, Laboratory of Immunopathology Sechenov UniversityMoscowRussian Federation
| | - Bruce D Levy
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical SchoolBostonUnited States
| | - Scott T Weiss
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical SchoolBostonUnited States
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3
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Paramonova N, Trapina I, Gradauskiene (Sitkauskiene) B, Plavina S, Tamasauskiene L, Bastyte D, Rumba-Rozenfelde I, Tapina S, Stakaitiene I, Ugenskiene R, Shih-Hsin Wu L, Wang JY, Hsieh MH, Chen PC, Sjakste N. Genetic Diversity in Bronchial Asthma Susceptibility: Exploring the Role of Vitamin D Receptor Gene Polymorphisms in Varied Geographic Contexts. Int J Mol Sci 2024; 25:1943. [PMID: 38339221 PMCID: PMC10856277 DOI: 10.3390/ijms25031943] [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: 12/18/2023] [Revised: 01/18/2024] [Accepted: 01/28/2024] [Indexed: 02/12/2024] Open
Abstract
Bronchial asthma (BA) exhibits varying prevalence across global populations, prompting a comprehensive investigation into genetic and environmental determinants. Vitamin D is a potent immunomodulator capable of suppressing inflammatory signals in several cell types involved in the asthmatic response; it exerts effects on the immune system by binding to the nuclear vitamin D receptor (VDR). VDR gene genetic variations are affecting serum vitamin D levels with a possible role in the BA risk. The current study aimed to examine the complex interaction of various factors (genetic background, serum vitamin D levels, and geographic location) to identify differences in the influence of these factors on the susceptibility to asthma between populations at different latitudes. Focusing on Eastern European cohorts from Latvia and Lithuania and comparing them with published data on East Asian populations, we explore the impact of VDR gene polymorphisms on BA susceptibility. Genotyping four key VDR SNPs and assessing their association with 25-hydroxyvitamin D levels, our study unveils significant associations of the studied loci with the risk of asthma-both risk-reducing and increasing effects, differently distributed between Baltic and East Asian populations. The functional effects of in silico VDR gene genetic variations are also identified and discussed.
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Affiliation(s)
- Natalia Paramonova
- Laboratory of Genomics and Bioinformatics, Institute of Biology, University of Latvia, LV-1004 Riga, Latvia; (N.P.); (S.P.); (N.S.)
| | - Ilva Trapina
- Laboratory of Genomics and Bioinformatics, Institute of Biology, University of Latvia, LV-1004 Riga, Latvia; (N.P.); (S.P.); (N.S.)
| | | | - Samanta Plavina
- Laboratory of Genomics and Bioinformatics, Institute of Biology, University of Latvia, LV-1004 Riga, Latvia; (N.P.); (S.P.); (N.S.)
| | - Laura Tamasauskiene
- Department of Immunology and Allergology, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania (L.T.); (D.B.)
| | - Daina Bastyte
- Department of Immunology and Allergology, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania (L.T.); (D.B.)
| | | | - Sandra Tapina
- Faculty of Medicine, University of Latvia, LV-1586 Riga, Latvia; (I.R.-R.); (S.T.)
| | - Ieva Stakaitiene
- Department of Genetics and Molecular Medicine, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania; (I.S.); (R.U.)
| | - Rasa Ugenskiene
- Department of Genetics and Molecular Medicine, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania; (I.S.); (R.U.)
| | - Lawrence Shih-Hsin Wu
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung 406040, Taiwan;
- Research Center of Allergy, Immunology, and Microbiome (AIM), China Medical University Hospital, Taichung 404327, Taiwan; (J.-Y.W.); (M.-H.H.); (P.-C.C.)
| | - Jiu-Yao Wang
- Research Center of Allergy, Immunology, and Microbiome (AIM), China Medical University Hospital, Taichung 404327, Taiwan; (J.-Y.W.); (M.-H.H.); (P.-C.C.)
- Department of Allergy and Immunology, China Medical University Children’s Hospital, Taichung 404327, Taiwan
| | - Miao-Hsi Hsieh
- Research Center of Allergy, Immunology, and Microbiome (AIM), China Medical University Hospital, Taichung 404327, Taiwan; (J.-Y.W.); (M.-H.H.); (P.-C.C.)
| | - Pei-Chi Chen
- Research Center of Allergy, Immunology, and Microbiome (AIM), China Medical University Hospital, Taichung 404327, Taiwan; (J.-Y.W.); (M.-H.H.); (P.-C.C.)
| | - Nikolajs Sjakste
- Laboratory of Genomics and Bioinformatics, Institute of Biology, University of Latvia, LV-1004 Riga, Latvia; (N.P.); (S.P.); (N.S.)
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4
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Weiss ST, Mirzakhani H, Carey VJ, O'Connor GT, Zeiger RS, Bacharier LB, Stokes J, Litonjua AA. Prenatal vitamin D supplementation to prevent childhood asthma: 15-year results from the Vitamin D Antenatal Asthma Reduction Trial (VDAART). J Allergy Clin Immunol 2024; 153:378-388. [PMID: 37852328 DOI: 10.1016/j.jaci.2023.10.003] [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: 07/24/2023] [Revised: 09/13/2023] [Accepted: 10/06/2023] [Indexed: 10/20/2023]
Abstract
This article provides an overview of the findings obtained from the Vitamin D Antenatal Asthma Reduction Trial (VDAART) spanning a period of 15 years. The review covers various aspects, including the trial's rationale, study design, and initial intent-to-treat analyses, as well as an explanation of why those analyses did not achieve statistical significance. Additionally, the article delves into the post hoc results obtained from stratified intent-to-treat analyses based on maternal vitamin D baseline levels and genotype-stratified analyses. These results demonstrate a statistically significant reduction in asthma among offspring aged 3 and 6 years when comparing vitamin D supplementation (4400 IU/d) to the standard prenatal multivitamin with vitamin D (400 IU/d). Furthermore, these post hoc analyses found that vitamin D supplementation led to a decrease in total serum IgE levels and improved lung function in children compared to those whose mothers received a placebo alongside the standard prenatal multivitamin with vitamin D. Last, the article concludes with recommendations regarding the optimal dosing of vitamin D for pregnant women to prevent childhood asthma as well as suggestions for future trials in this field.
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Affiliation(s)
- Scott T Weiss
- Department of Medicine, Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass.
| | - Hooman Mirzakhani
- Department of Medicine, Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass
| | - Vincent J Carey
- Department of Medicine, Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass
| | - George T O'Connor
- Department of Medicine, Pulmonary Centre, Boston Medical Centre, Boston University, Boston, Mass
| | - Robert S Zeiger
- Department of Clinical Science, Kaiser Permanente Bernard J. Tyson School of Medicine, Pasadena, Calif
| | - Leonard B Bacharier
- Department of Pediatrics, Division of Pediatric Allergy, Immunology and Pulmonary Medicine, Monroe Carell Jr Children's Hospital at Vanderbilt, Nashville, Tenn
| | - Jeffrey Stokes
- Department of Pediatrics, Division of Pediatric Allergy, Immunology and Pulmonary Medicine, Washington University, St Louis, Mo
| | - Augusto A Litonjua
- Department of Pediatrics Golisano Children's Hospital, Pediatric Pulmonary Division, University of Rochester Medical School, Rochester, NY
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5
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Kaur N, Kumar V, Singh J, Jain H, Paras P, Kaur N, Sareen AK. Assessment of the Relation Between Asthma Severity and Serum Vitamin D Levels: A Cross-Sectional Study. Cureus 2023; 15:e46826. [PMID: 37954776 PMCID: PMC10636570 DOI: 10.7759/cureus.46826] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/10/2023] [Indexed: 11/14/2023] Open
Abstract
Introduction Vitamin D3's importance for bone health in children and its potential role beyond musculocutaneous health is an ongoing area of research. This study assesses vitamin D3 deficiency prevalence in asthmatic children and its correlation with asthma cases and healthy controls. Methods This cross-sectional study was conducted in a tertiary care hospital in Punjab, India among children between 5 and 15 years of age. Fifty children diagnosed with "bronchial asthma" who were under follow-up in the asthma clinic in outpatient and inpatient patients were enrolled as cases. Age-matched 50 healthy controls who presented for routine check-ups were enrolled in the control group. Demographic details were noted and clinical examination was done in all the cases. 25-(OH) vitamin D levels were estimated and compared in all cases and controls. The study also analyzed the relationship between 25-(OH) vitamin D levels with asthma control and severity. Results The study showed that serum vitamin D3 level was significantly decreased in asthmatic children (24.62 ± 14.95 ng/ml) as compared with the healthy control group (32.08 ± 12.22 ng/ml). Also, serum vitamin D3 level was significantly decreased in children with uncontrolled asthma (12.06 ± 4.68 ng/ml) as compared to children with well-controlled asthma (44.82 ± 10.48 ng/ml). Conclusion The findings showed that low serum levels were observed more in asthmatic children as compared to healthy children. A correlation was also found between vitamin D3 levels and asthma severity, its control, and the number of acute exacerbations in the last year.
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Affiliation(s)
- Navjot Kaur
- Department of Pediatrics, Government Medical College, Amritsar, Amritsar, IND
| | - Vipul Kumar
- Department of Pediatrics, Government Medical College, Amritsar, Amritsar, IND
| | - Jagjot Singh
- Department of Pediatrics, Government Medical College, Amritsar, Amritsar, IND
| | - Hritvik Jain
- Department of Pediatrics, All India Institute of Medical Sciences, Jodhpur, Jodhpur, IND
| | - Paras Paras
- Department of Pediatrics, Government Medical College, Patiala, Patiala, IND
| | - Nirmaljeet Kaur
- Department of Pediatrics, Government Medical College, Amritsar, Amritsar, IND
| | - Ashwani K Sareen
- Department of Pediatrics, Government Medical College, Amritsar, Amritsar, IND
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González-Tarancón R, Goñi-Ros N, Salvador-Rupérez E, Hernández-Martín Á, Izquierdo-Álvarez S, Puzo-Foncillas J, Gilaberte-Calzada Y. Association Between VDR and CYP24A1 Polymorphisms, Atopic Dermatitis, and Biochemical Lipid and Vitamin D Profiles in Spanish Population: Case-Control Study. JMIR DERMATOLOGY 2023; 6:e39567. [PMID: 37632926 PMCID: PMC10337012 DOI: 10.2196/39567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 04/21/2023] [Accepted: 05/16/2023] [Indexed: 08/28/2023] Open
Abstract
BACKGROUND Atopic dermatitis (AD) is the most prevalent inflammatory skin disorder, characterized by impaired epidermal barrier function and an altered immune response, both of which are influenced by vitamin D deficiency. Single-nucleotide polymorphisms (SNPs) in VDR and CYP24A1 have been previously associated with AD. OBJECTIVE We sought to characterize the associations between the VDR and CYP24A1 polymorphisms and the vitamin D and lipid biochemical profile in children diagnosed with AD. METHODS A total of 246 participants (143 patients with AD and 103 healthy controls) were enrolled in this study. Genotyping for polymorphisms in VDR (rs2239185, rs1544410, rs7975232, rs2238136, rs3782905, rs2239179, rs1540339, rs2107301, rs2239182, and rs731236) and CYP24A1 (rs2248359 and rs2296241) was performed by allele-specific polymerase chain reaction using integrated fluidic circuit technology. Serum levels of calcium, phosphorus, and vitamin D were measured, and the biochemical lipid profile was determined. RESULTS Among VDR SNPs, rs2239182 exerted a protective effect against the development of AD, whereas rs2238136 was identified as a risk factor for AD. The GCC haplotype (rs2239185-G, rs1540339-C, and rs2238136-C) appeared to protect against the development of AD. rs2239182-CC was associated with higher 25(OH)D concentrations, whereas rs2238136-TT, rs2239185-GA, and rs2248359-TT were present in a large proportion of patients with serum vitamin D deficiency. rs2239185-AA, rs2239182-CC, and rs1540339-CC were associated with higher serum total cholesterol; rs2239182-TT was associated with lower low-density lipoprotein cholesterol; and rs2239182-TC with lower high-density lipoprotein cholesterol. Both CYP24A1 SNPs (rs2296241-AA and rs2248359-TT) were associated with higher high-density lipoprotein cholesterol levels. CONCLUSIONS The VDR SNP rs2238136 is a risk factor for AD and other SNPs in VDR and CYP24A1, which may lead to alterations in biochemical parameters that influence the risk of AD. Our findings highlight the complex genetic basis to AD and indicate that interrelationships between different genetic factors can lead to alterations in vitamin D metabolism or lipid profiles, which in turn may influence the development of AD.
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Affiliation(s)
| | - Nuria Goñi-Ros
- Department of Clinical Biochemistry, Hospital Universitario Miguel Servet, Zaragoza, Spain
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7
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Rojo-Tolosa S, Pineda-Lancheros LE, Gálvez-Navas JM, Sánchez-Martínez JA, González-Gutiérrez MV, Fernández-Alonso A, Morales-García C, Jiménez-Morales A, Pérez-Ramírez C. Association between Single Nucleotide Polymorphisms Related to Vitamin D Metabolism and the Risk of Developing Asthma. Nutrients 2023; 15:823. [PMID: 36839181 PMCID: PMC9964183 DOI: 10.3390/nu15040823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 02/01/2023] [Accepted: 02/02/2023] [Indexed: 02/09/2023] Open
Abstract
Asthma is a chronic non-communicable disease that affects all age groups. The main challenge this condition poses is its heterogeneity. The role of vitamin D in asthma has aroused great interest, correlating low vitamin D levels and polymorphisms in the genes involved in its metabolic pathway with the risk of asthma. The aim of this study was to evaluate the influence of 13 single nucleotide polymorphisms (SNPs) related to the vitamin D metabolism on the susceptibility to asthma. An observational case-control study was performed, including 221 patients with asthma and 442 controls of Caucasian origin from southern Spain. The SNPs CYP24A1 (rs6068816, rs4809957), CYP27B1 (rs10877012, rs4646536, rs703842, rs3782130), GC (rs7041), CYP2R1 (rs10741657) and VDR (ApaI, BsmI, FokI, Cdx2, TaqI) were analyzed by real-time PCR, using TaqMan probes. The logistic regression model adjusted for body mass index revealed that in the genotype model, carriers of the Cdx2 rs11568820-AA genotype were associated with a higher risk of developing asthma (p = 0.005; OR = 2.73; 95% CI = 1.36-5.67; AA vs. GG). This association was maintained in the recessive model (p = 0.004). The haplotype analysis revealed an association between the ACTATGG haplotype and higher risk of asthma for the rs1544410, rs7975232, rs731236, rs4646536, rs703842, rs3782130 and rs10877012 genetic polymorphisms (p = 0.039). The other SNPs showed no effect on risk of developing asthma. The Cdx2 polymorphism was significantly associated with the susceptibility of asthma and could substantially act as a predictive biomarker of the disease.
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Affiliation(s)
- Susana Rojo-Tolosa
- Respiratory Medicine Department, University Hospital Virgen de las Nieves, 18014 Granada, Spain
| | | | - José María Gálvez-Navas
- Biomedical Research Center, Department of Biochemistry and Molecular Biology II, Institute of Nutrition and Food Technology “José Mataix”, University of Granada, Avda. del Conocimiento s/n., 18016 Granada, Spain
- Cancer Registry of Granada, Andalusian School of Public Health, Carretera del Observatorio 4, 18011 Granada, Spain
| | | | | | - Andrea Fernández-Alonso
- Pharmacogenetics Unit, Pharmacy Service, University Hospital Virgen de las Nieves, 18014 Granada, Spain
| | | | - Alberto Jiménez-Morales
- Pharmacogenetics Unit, Pharmacy Service, University Hospital Virgen de las Nieves, 18014 Granada, Spain
| | - Cristina Pérez-Ramírez
- Pharmacogenetics Unit, Pharmacy Service, University Hospital Virgen de las Nieves, 18014 Granada, Spain
- Biomedical Research Center, Department of Biochemistry and Molecular Biology II, Institute of Nutrition and Food Technology “José Mataix”, University of Granada, Avda. del Conocimiento s/n., 18016 Granada, Spain
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8
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Takkinsatian P, Mairiang D, Sangkanjanavanich S, Chiewchalermsri C, Tripipitsiriwat A, Sompornrattanaphan M. Dietary Factors Associated with Asthma Development: A Narrative Review and Summary of Current Guidelines and Recommendations. J Asthma Allergy 2022; 15:1125-1141. [PMID: 36046721 PMCID: PMC9420923 DOI: 10.2147/jaa.s364964] [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: 04/24/2022] [Accepted: 08/15/2022] [Indexed: 11/24/2022] Open
Abstract
Asthma is a complex disease, caused by a combination of genetic and environmental factors. The prevalence of asthma is increasing too rapidly to be attributable to genetic factors alone. Thus, environmental factors are becoming increasingly recognized as the cause of asthma. Modifying these environmental factors may be a simple approach for asthma prevention. To date, dietary intervention is an interesting modifiable factor because it can be implemented at the population level. The modification of systemic inflammation, oxidation, and microbial composition might be a mechanistic basis for prevention. This review summarizes the mechanistic basis and evidence from clinical studies on the association between dietary factors and asthma development. We also summarize the recommendations from many organizations and regional guidelines to assist the practicing physician to improve patient care.
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Affiliation(s)
- Preyanit Takkinsatian
- Department of Pediatrics, Faculty of Medicine, Vajira Hospital, Navamindradhiraj University, Bangkok, Thailand
| | - Dara Mairiang
- Department of Pediatrics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Sasipa Sangkanjanavanich
- Division of Allergy, Immunology, and Rheumatology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand.,Department of Medicine, Phyathai 2 International Hospital, Bangkok, Thailand
| | - Chirawat Chiewchalermsri
- Department of Medicine, Panyananthaphikkhu Chonprathan Medical Center, Srinakharinwirot University, Nonthaburi, Thailand
| | - Athiwat Tripipitsiriwat
- Division of Respiratory Disease and Tuberculosis, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Mongkhon Sompornrattanaphan
- Division of Allergy and Clinical Immunology, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
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9
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Chowdhury NU, Guntur VP, Newcomb DC, Wechsler ME. Sex and gender in asthma. Eur Respir Rev 2021; 30:30/162/210067. [PMID: 34789462 DOI: 10.1183/16000617.0067-2021] [Citation(s) in RCA: 125] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 06/26/2021] [Indexed: 12/16/2022] Open
Abstract
Asthma is a heterogenous disease, and its prevalence and severity are different in males versus females through various ages. As children, boys have an increased prevalence of asthma. As adults, women have an increased prevalence and severity of asthma. Sex hormones, genetic and epigenetic variations, social and environmental factors, and responses to asthma therapeutics are important factors in the sex differences observed in asthma incidence, prevalence and severity. For women, fluctuations in sex hormone levels during puberty, the menstrual cycle and pregnancy are associated with asthma pathogenesis. Further, sex differences in gene expression and epigenetic modifications and responses to environmental factors, including SARS-CoV-2 infections, are associated with differences in asthma incidence, prevalence and symptoms. We review the role of sex hormones, genetics and epigenetics, and their interactions with the environment in the clinical manifestations and therapeutic response of asthma.
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Affiliation(s)
- Nowrin U Chowdhury
- Dept of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN, USA.,The NJH Cohen Family Asthma Institute, Denver, CO, USA.,Equal contribution to first authorship
| | - Vamsi P Guntur
- Division of Pulmonary, Critical Care, and Sleep Medicine, National Jewish Health, Denver, CO, USA.,The NJH Cohen Family Asthma Institute, Denver, CO, USA.,Equal contribution to first authorship
| | - Dawn C Newcomb
- Dept of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN, USA .,Dept of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Michael E Wechsler
- Division of Pulmonary, Critical Care, and Sleep Medicine, National Jewish Health, Denver, CO, USA.,The NJH Cohen Family Asthma Institute, Denver, CO, USA
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10
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Vitamin D Regulates the Expression of Glucocorticoid Receptors in Blood of Severe Asthmatic Patients. J Immunol Res 2021; 2021:9947370. [PMID: 34395637 PMCID: PMC8363450 DOI: 10.1155/2021/9947370] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 07/17/2021] [Indexed: 01/02/2023] Open
Abstract
Purpose Vitamin D (VitD) deficiency is a significant public health concern in many areas around the globe and has been associated with many immune-mediated diseases, including asthma. Severe asthma has been linked to a decreased glucocorticoid receptor (GR) ratio (GR-α/GR-β ratio), indicating steroid hyporesponsiveness. Using a combination of in silico and in vivo approaches, we aimed to explore the immunomodulatory effect of VitD on asthmatic patients diagnosed with hypovitaminosis D. Methods In silico tools were used to identify the regulatory effect of VitD supplementation on GR genes. We measured the expression levels of GR-α and the inactive isoform, GR-β, in the blood of adult asthmatics diagnosed with hypovitaminosis D before and after VitD supplementation. Moreover, the blood levels of inflammatory cytokines associated with asthma severity were determined. Results Using an in silico approach, we identified specific genes commonly targeted by VitD as well as corticosteroids, the mainstay of asthma therapy. NR3C1 gene encoding GR was found to be significantly upregulated on Th2 CD4 cells and NK cells. Interestingly, blood expression level of NR3C1 was lower in severe asthmatics compared to nonsevere asthmatics and healthy controls, while the blood level of VitD receptor (VDR) was higher. Upon VitD supplementation of severe asthmatic patients, there was a significant increase in the blood levels of GR-α with no change in GR-β mRNA expression. VitD supplementation also suppressed the blood levels of IL-17F and IL-4. Conclusion VitD may enhance steroid responsiveness by upregulating the expression of steroid receptor GR-α.
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11
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Brustad N, Greve JH, Mirzakhani H, Pedersen CET, Eliasen AU, Stokholm J, Lasky-Su J, Bønnelykke K, Litonjua AA, Weiss ST, Bisgaard H, Chawes BL. High-dose vitamin D during pregnancy and pathway gene polymorphisms in prevention of offspring persistent wheeze. Pediatr Allergy Immunol 2021; 32:679-689. [PMID: 33453076 DOI: 10.1111/pai.13453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/08/2021] [Accepted: 01/11/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Randomized controlled trials (RCTs) suggest a protective effect of high-dose vitamin D supplementation in pregnancy on offspring risk of persistent wheeze, but only in some individuals, which might be explained by variations in vitamin D pathway genes. This study aimed to investigate the effect of vitamin D supplementation by maternal and offspring vitamin D receptor (VDR) genotype and GC genotype, encoding vitamin D binding protein (VDBP), in two RCTs. METHODS In the Copenhagen Prospective Studies on Asthma in Childhood (COPSAC2010 ) RCT, we analyzed the effect of high-dose vitamin D during pregnancy on the risk of persistent wheeze age 0-3 years by variants in single nucleotide polymorphisms (SNPs) in VDR (rs1544410, rs2228570, rs7975128, rs7975232) and GC (rs4588, rs7041). Replication was sought in the Vitamin D Antenatal Asthma Reduction Trial (VDAART). RESULTS In COPSAC2010 , VDR SNP rs1544410 influenced the effect of high-dose vitamin D: maternal Pinteraction = .049 and child Pinteraction = .001, with the largest effect in offspring from mothers with TT genotype: hazard ratio (95% CI), 0.26 (0.10-0.68), P = .006, and no effect among CT or CC genotypes: 0.85 (0.48-1.51), P = .58 and 0.94 (0.47-1.89), P = .87, respectively. However, these findings were not replicated in VDAART. There was no significant effect modification from maternal or offspring GC genotype in either COPSAC2010 or VDAART: all Pinteraction ≥ .17. CONCLUSIONS We found that the effect of high-dose vitamin D supplementation during pregnancy on offspring risk of persistent wheeze was significantly influenced by VDR genotype in the COPSAC2010 RCT, but not VDAART, which may be due to population differences.
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Affiliation(s)
- Nicklas Brustad
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark.,Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Jens H Greve
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Hooman Mirzakhani
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Casper-Emil T Pedersen
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Anders U Eliasen
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Jakob Stokholm
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark.,Department of Pediatrics, Naestved Hospital, Naestved, Denmark
| | - Jessica Lasky-Su
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Klaus Bønnelykke
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Augusto A Litonjua
- Division of Pediatric Pulmonary Medicine, Golisano Children's Hospital, University of Rochester Medical Center, Rochester, NY, USA
| | - Scott T Weiss
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Hans Bisgaard
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Bo L Chawes
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
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12
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Jat KR, Goel N, Gupta N, Gupta CP, Datta S, Lodha R, Kabra SK. Efficacy of vitamin D supplementation in asthmatic children with vitamin D deficiency: A randomized controlled trial (ESDAC trial). Pediatr Allergy Immunol 2021; 32:479-488. [PMID: 33207014 DOI: 10.1111/pai.13415] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/06/2020] [Accepted: 11/11/2020] [Indexed: 02/03/2023]
Abstract
BACKGROUND Vitamin D supplementations for asthma control had shown inconsistent results. We aimed to study efficacy and safety of vitamin D supplementation in asthmatic children who were vitamin D deficient. METHODS This double-blind, randomized controlled trial enrolled asthmatic children of 4-12 years of age who had 25-hydroxyvitamin D [25(OH)D] levels <20 ng/mL. The participants were randomized to receive either vitamin D orally 1000 IU/d for 9 months or similar-looking placebo. The primary outcomes were the proportion of children having the Childhood Asthma Control Test (CACT) score of ≥20 at the end of the treatment and adverse effects. RESULTS The trial included 250 children (125 in each group) with a mean age of 8.1 ± 2.3 years and 180 boys. The baseline parameters were similar between the groups, including CACT score (21.7 ± 4.2 vs 21.9 ± 3.6, vitamin D vs placebo). At the end of the study, the proportion of asthmatic children who had CACT score ≥ 20 was similar between vitamin D and placebo group (93.6% vs 92.0%, P = .625). The number of exacerbations of asthma and side effect profile was also identical between the groups. 25(OH)D levels increased significantly in the vitamin D group (18.06 ± 7.11 vs 12.03 ± 5.98 ng/mL, P < .001). The results did not change when we did subgroup analysis for children with baseline CACT score < 20 and 25(OH)D levels at the end of the study ≥20 ng/mL. CONCLUSION Vitamin D supplementation in asthmatic children with vitamin D deficiency did not improve control of asthma.
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Affiliation(s)
- Kana Ram Jat
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Nancy Goel
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Nandita Gupta
- Department of Endocrinology, All India Institute of Medical Sciences, New Delhi, India
| | | | - Sudip Datta
- Department of Laboratory Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Rakesh Lodha
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Sushil K Kabra
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
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13
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Non-Musculoskeletal Benefits of Vitamin D beyond the Musculoskeletal System. Int J Mol Sci 2021; 22:ijms22042128. [PMID: 33669918 PMCID: PMC7924658 DOI: 10.3390/ijms22042128] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/13/2021] [Accepted: 02/17/2021] [Indexed: 02/06/2023] Open
Abstract
Vitamin D, a fat-soluble prohormone, is endogenously synthesized in response to sunlight or taken from dietary supplements. Since vitamin D receptors are present in most tissues and cells in the body, the mounting understanding of the role of vitamin D in humans indicates that it does not only play an important role in the musculoskeletal system, but has beneficial effects elsewhere as well. This review summarizes the metabolism of vitamin D, the research regarding the possible risk factors leading to vitamin D deficiency, and the relationships between vitamin D deficiency and numerous illnesses, including rickets, osteoporosis and osteomalacia, muscle weakness and falls, autoimmune disorders, infectious diseases, cardiovascular diseases (CVDs), cancers, and neurological disorders. The system-wide effects of vitamin D and the mechanisms of the diseases are also discussed. Although accumulating evidence supports associations of vitamin D deficiency with physical and mental disorders and beneficial effects of vitamin D with health maintenance and disease prevention, there continue to be controversies over the beneficial effects of vitamin D. Thus, more well-designed and statistically powered trials are required to enable the assessment of vitamin D’s role in optimizing health and preventing disease.
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14
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Huang F, Ju YH, Wang HB, Li YN. Maternal vitamin D deficiency impairs Treg and Breg responses in offspring mice and deteriorates allergic airway inflammation. Allergy Asthma Clin Immunol 2020; 16:89. [PMID: 33072159 PMCID: PMC7557044 DOI: 10.1186/s13223-020-00487-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Accepted: 10/06/2020] [Indexed: 02/06/2023] Open
Abstract
Background Vitamin D (VitD) can regulate immune responses and maternal VitD-deficiency can affect immune responses in the offspring. This study aimed at investigating the effects of maternal VitD-deficiency during pregnancy on Treg and Breg responses in offspring mice with house dust mite (HDM)-induced allergic airway inflammation. Methods Female BALB/c mice were randomized and fed with normal chow or VitD-deficient diet until their offspring weaned. The offspring mice were fed with normal chow and injected with vehicle or HDM to induce allergic airway inflammation. The levels of serum 25(OH)D, cytokines and infiltrate numbers as well as percentages of Tregs and Bregs in the bronchoalveolar lavage fluid (BALF) were analyzed. The relative levels of VitD receptor (VDR), VitD-binding protein (VDBP), Cytochromes P450 (CYP) 27b1, and CYP24A1 mRNA transcripts in the lungs of different groups of mice were measured. Results Maternal VitD-deficiency significantly reduced serum 25(OH)D levels in offspring mice. VitD-deficiency significantly increased the relative levels of VDR, VDBP and CYP27B1 mRNA transcripts, but decreased CYP24A1 expression in the lungs of mice. In comparison with the control mice, significantly elevated levels of pro-inflammatory cytokines, increased numbers of lymphocytes and eosinophils, but decreased levels of anti-inflammatory cytokines were detected in the BALF of VitD-deficient mice. VitD-deficiency significantly increased the frequency of Th1, Th2, Th9, Th17 cells, but decreased regulatory T (Tregs) and B cells (Bregs) in the BALF of mice with allergic airway inflammation. Conclusion Maternal VitD-deficiency lowed serum 25(OH)D levels and enhanced HDM-induced allergic airway inflammation in the offspring by impairing Breg and Treg responses.
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Affiliation(s)
- Fei Huang
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun, 130033 Jilin China
| | - Yang-Hua Ju
- Department of Pediatrics, the First Hospital of Jilin University, Changchun, 130021 Jilin China
| | - Hong-Bo Wang
- Department of Pediatrics, the First Hospital of Jilin University, Changchun, 130021 Jilin China
| | - Ya-Nan Li
- Department of Pediatrics, the First Hospital of Jilin University, Changchun, 130021 Jilin China.,Institute of Pediatrics, the First Hospital of Jilin University, Changchun, 130021 Jilin China
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15
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Ashok N, Kirubakaran R, Saraswathy R. Association of vitamin D gene polymorphisms in children with asthma - A systematic review. Heliyon 2020; 6:e04795. [PMID: 32939414 PMCID: PMC7479342 DOI: 10.1016/j.heliyon.2020.e04795] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 06/23/2020] [Accepted: 08/24/2020] [Indexed: 11/30/2022] Open
Abstract
INTRODUCTION The association of Vitamin D and children with asthma is known and there are several individual studies on Vitamin D polymorphisms. However, systematic reviews on all vitamin D associated gene polymorphisms have not been done in children with asthma. OBJECTIVE To investigate the association of Vitamin D associated gene polymorphisms and asthma in children (0-18 years) by systematic review and meta-analytic approach. METHODS Our search included 20 full text articles of which 15 were case control studies and 5 used family based linkage disequilibrium method. Total of 2491cases and 3682 controls were included in case control studies, with mean age of 9.58 years and 10.16 years respectively. Quantitative and qualitative analysis were done. RESULTS Quantitative analysis revealed significant association with protective effect of Apa1 polymorphism in allele (OR 0.81 (0.71,0.91) and homozygous major form (OR 0.83 (0.70,0.98) and Taq 1 minor allele in homozygous form (OR 0.73 (0.58,0.92) in children with asthma. However, the minor allele of Apa1(OR 1.21 (1.07,1.37), Bsm 1 in heterozygous (OR 1.35 (1.07,1.71) and homozygous minor form (OR 1.95 (1.59,2.39), major allele of Fok1(OR1.34 (1.17,1.52) and Taq1 (OR 1.22 (1.08,1.38) were found to be increasing the odds of asthma. Ethnic variations were noted in subgroup analysis. Qualitative analysis of the polymorphisms of the Vitamin D associated metabolic genes also showed significant associations. CONCLUSION Our review shows significant associations with VDR polymorphisms - Apa1, Bsm1, Fok 1, Taq 1, polymorphisms of Vitamin D metabolic genes - CYP27A1, CYP 2R1, CYP 24A1, GC and genes related to Vitamin D response element (VDRE) in children with asthma. Conducting large studies involving various ethnic regions will strengthen our knowledge on the association and aid in targeted interventions for control of asthma in children.
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Affiliation(s)
- Narmada Ashok
- School of Biosciences & Technology, VIT University, Vellore
- Nalam Medical Centre & Hospital, Vellore
| | | | - Radha Saraswathy
- 120TT Biomedical Genetics Research Lab (BMGRL), Dept of Biomedical Sciences, School of Biosciences & Technology, VIT University 632014, Vellore
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16
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Galvão AA, de Araújo Sena F, Andrade Belitardo EMMD, de Santana MBR, Costa GNDO, Cruz ÁA, Barreto ML, Costa RDS, Alcantara-Neves NM, Figueiredo CA. Genetic polymorphisms in vitamin D pathway influence 25(OH)D levels and are associated with atopy and asthma. Allergy Asthma Clin Immunol 2020; 16:62. [PMID: 32834827 PMCID: PMC7386242 DOI: 10.1186/s13223-020-00460-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 06/26/2020] [Indexed: 12/28/2022] Open
Abstract
Background Vitamin D deficiency or insufficiency, has been associated with atopy and lack of asthma control. Our objective was to investigate associations between variants in genes of vitamin D pathway with serum levels of 25-hydroxyvitamin D (25(OH)D), atopy, asthma and asthma severity in teenagers from Northeast Brazil. Methods This is a cross sectional study nested in a cohort population of asthma. 25(OH)D was quantified from 968 of 11–17 years old individuals by ELISA. Asthma diagnosis was obtained by using the ISAAC Phase III questionnaire. Specific IgE was determined by ImmunoCAP; genotyping was performed using the 2.5 HumanOmni Biochip from Illumina. Statistical analyses were performed in PLINK 1.07 and SPSS 22.1. Results After quality control, 104 Single Nucleotides Variants (SNVs) in vitamin D pathway genes, typed in 792 individuals, were included in the analysis. The allele A of rs10875694 on VDR was positively associated with atopy (OR = 1.35; 95% CI 1.01–1.81). The allele C of rs9279 on VDR, was negatively associated with asthma risk (OR = 0.66; 95% CI 0.45–0.97), vitamin D insufficiency (OR = 0.78; 95% CI 0.70–0.96) and higher VDR expression. Two variants in VDR were associated with asthma severity, the allele A of rs2189480 (OR = 0.34; 95% CI 0.13–0.89) and the allele G of rs4328262 (OR = 3.18; 95% CI 1.09–9.28). The combination of variants in CYP2R1 and CYP24A1 (GAC, to rs10500804, rs12794714 and rs3886163, respectively) was negatively associated with vitamin D production (β = − 1.24; 95% CI − 2.42 to − 0.06). Conclusions Genetic variants in the vitamin D pathway affect vitamin D serum levels and, thus, atopy and asthma.
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Affiliation(s)
- Alana Alcântara Galvão
- Instituto de Ciências da Saúde, Universidade Federal da Bahia (UFBA), Salvador, Bahia, Brazil.,Programa de Pós Graduação em Imunologia (PPGIm), Bahia, Brazil
| | - Flávia de Araújo Sena
- Instituto de Ciências da Saúde, Universidade Federal da Bahia (UFBA), Salvador, Bahia, Brazil.,Programa de Pós Graduação em Imunologia (PPGIm), Bahia, Brazil
| | | | - Maria Borges Rabelo de Santana
- Instituto de Ciências da Saúde, Universidade Federal da Bahia (UFBA), Salvador, Bahia, Brazil.,Programa de Pós Graduação em Imunologia (PPGIm), Bahia, Brazil
| | - Gustavo Nunes de Oliveira Costa
- Instituto de Saúde Coletiva, Universidade Federal da Bahia (UFBA), Salvador, Bahia, Brazil.,Universidade Salvador (UNIFACS), Salvador, Bahia, Brazil
| | - Álvaro Augusto Cruz
- ProAR, Faculdade de Medicina, Universidade Federal da Bahia (UFBA), Salvador, Bahia, Brazil
| | - Maurício Lima Barreto
- Instituto de Saúde Coletiva, Universidade Federal da Bahia (UFBA), Salvador, Bahia, Brazil.,Centro de Integração de dados e Conhecimentos para Saúde(CIDACS), Fiocruz, Bahia Brazil
| | - Ryan Dos Santos Costa
- Instituto de Ciências da Saúde, Universidade Federal da Bahia (UFBA), Salvador, Bahia, Brazil.,Programa de Pós Graduação em Imunologia (PPGIm), Bahia, Brazil
| | - Neuza Maria Alcantara-Neves
- Instituto de Ciências da Saúde, Universidade Federal da Bahia (UFBA), Salvador, Bahia, Brazil.,Programa de Pós Graduação em Imunologia (PPGIm), Bahia, Brazil
| | - Camila Alexandrina Figueiredo
- Instituto de Ciências da Saúde, Universidade Federal da Bahia (UFBA), Salvador, Bahia, Brazil.,Programa de Pós Graduação em Imunologia (PPGIm), Bahia, Brazil.,Departamento de Ciências da Biorregulação, Instituto de Ciências da Saúde, Universidade Federal da Bahia, Canela, CEP 41110-100 Salvador, BA Brazil
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17
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Leiter K, Franks K, Borland ML, Coleman L, Harris L, Le Souëf PN, Laing IA. Vitamin D receptor polymorphisms are associated with severity of wheezing illnesses and asthma exacerbations in children. J Steroid Biochem Mol Biol 2020; 201:105692. [PMID: 32380236 DOI: 10.1016/j.jsbmb.2020.105692] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 12/27/2022]
Abstract
Single nucleotide polymorphisms (SNPs) of the vitamin D receptor (VDR) gene have shown linkage and association with asthma development in multiple cohort studies. However, the majority of investigations have focused on asthma phenotypes in cohorts with stable disease. We investigated the relationship between VDR SNPs and the frequency and severity of acute episodes of wheeze/asthma in a cohort of Australian children, as the ability to identify children at risk of more severe exacerbations could lead to personalized and improved genotype-specific treatment pathways. We successfully genotyped five SNPs of the VDR gene (rs2525046, rs9729, rs1544410 (BsmI), rs22239179, and rs2228570 (FokI)) in 657 children presenting to a tertiary children's hospital with acute asthma, bronchiolitis, or a wheezing illness. The relationships between VDR SNPs and exacerbation severity scores, β2-agonist use, and frequency of respiratory exacerbations were analysed using multiple regression. The rs2525046 (FokI) CT genotype was associated with higher VDR mRNA intensity levels (p = 0.007) compared to the CC genotype. A trend towards significance (p=0.056) was identified between the rs2525046 TT genotype and higher VDR mRNA intensity levels compared to the CC genotype. Children with rs2228570 AA genotype had higher exacerbation severity scores (p=0.001) and poorer β2-agonist treatment response (doses at 6 h: p = 0.009 and 12 h: p=0.033) compared to those with the GG genotype. Children with rs1544410 (BsmI) TT genotype had lower exacerbation severity scores (p = 0.005) compared to those with the CC genotype. Children with rs2228570 GA genotype presented to and/or were admitted to hospital more times since birth with respiratory (p = 0.011) and wheezing (p = 0.021) illnesses than children with the GG genotype. No associations were identified between rs9729, rs2525046 and r2239179 polymorphisms and acute wheezing/asthma variables. These findings suggest that genetic variants at the VDR locus may play a role in acute wheeze/asthma severity in children.
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Affiliation(s)
- Katharine Leiter
- School of Medicine, University of Western Australia, Perth, Australia
| | - Kimberley Franks
- School of Medicine, University of Western Australia, Perth, Australia; Telethon Kids Institute, Perth, Australia
| | - Meredith L Borland
- School of Medicine, University of Western Australia, Perth, Australia; Emergency Department, Princess Margaret Hospital, Perth, Australia
| | - Laura Coleman
- School of Medicine, University of Western Australia, Perth, Australia; Telethon Kids Institute, Perth, Australia
| | - Leesa Harris
- School of Medicine, University of Western Australia, Perth, Australia; Telethon Kids Institute, Perth, Australia
| | - Peter N Le Souëf
- School of Medicine, University of Western Australia, Perth, Australia; Telethon Kids Institute, Perth, Australia
| | - Ingrid A Laing
- School of Medicine, University of Western Australia, Perth, Australia; Telethon Kids Institute, Perth, Australia.
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18
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Kuti BP, Kuti DK. Relationship between serum 25-hydroxyvitamin D and inflammatory cytokines in Nigerian children with asthma. J Asthma 2020; 58:604-613. [PMID: 31914352 DOI: 10.1080/02770903.2020.1712726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Background: Childhood asthma involves a network of mutually interacting inflammatory mediators and cytokines. The influence of serum vitamin D (an immunomodulatory agent) on these cytokines is poorly understood. This study sets out to determine the relationship between serum T-helper cells type 1 cytokines (Interleukins ILs-1β, 2, 6, 8 and 10), type 2 cytokines (ILs 3, 4,5,9,13), ILs-12, 17 and 25-hydroxyvitamin D (25-OHD) in Nigerian children with asthma.Methods: Children with physician-diagnosed asthma and non-asthmatics aged 2-15 years were consecutively recruited at a tertiary center in Nigeria. Serum 25-OHD and cytokines were assayed using chromatography method and association between these parameters determined.Results: A total of 180 children (90 for each group; mean age 7.5 ± 3.9 years; M:F 1.9:1) were recruited. Fifty-six (76.7%) asthmatics had mild intermittent form and symptoms were sub-optimally controlled in 16 (21.9%). The mean (SD) serum Vitamin D was lower in children with asthma (38.8 ± 17.0 ng/ml vs. 45.5 ± 16.6 ng/ml vs. p = 0.023). Also more proportion of children with asthma had suboptimal serum vitamin D level (26.0% vs. 8.8%; p = 0.022). Deficient vitamin D state was associated with higher serum Th1 and Th2 cytokines compared to insufficient state, but the highest cytokine levels were observed in normal vitamin D state. There was significant positive correlation between serum vitamin D and Th1 cytokines IL-2 and IL-8 as well as Th2 cytokines (ILs-3, 4, 5 and 9), but negative correlation with IL-13Conclusions: Serum Vitamin D and cytokines were lower in a sample of Nigerian children with asthma than controls. Vitamin D status was not related to asthma severity and control. Serum 25-OHD seems to have a non-linear relationship with Th1 and Th2 cytokines in Nigerian asthmatics.
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Affiliation(s)
- Bankole Peter Kuti
- Department of Paediatrics, Wesley Guild Hospital, Ilesa, Nigeria.,Department of Paediatrics and Child Health, Obafemi Awolowo University, Ile-Ile, Nigeria
| | - Demilade K Kuti
- Department of Paediatrics, Wesley Guild Hospital, Ilesa, Nigeria
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19
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Nasiri‐Kalmarzi R, Abdi M, Hosseini J, Tavana S, Mokarizadeh A, Rahbari R. Association of vitamin D genetic pathway with asthma susceptibility in the Kurdish population. J Clin Lab Anal 2020; 34:e23039. [PMID: 31541492 PMCID: PMC6977155 DOI: 10.1002/jcla.23039] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 08/28/2019] [Accepted: 08/30/2019] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Vitamin D (Vit D) function in asthma progression has been studied well. The effects of genetic variations in Vit D pathway molecules have been also studied, although the results are contradicted. In the present study, for the first time we examined the Vit D pathway molecules included serum Vit D and vitamin D-binding protein (VDBP) and also genetic variations in the vitamin D receptor (VDR) and VDBP in a Kurdish population with asthma. METHODS An enzyme-linked immunosorbent assay (ELISA) method was used to measure the serum Vit D and VDBP. VDR rs1544410 and rs2228570 and VDBP rs7041 were assessed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). RESULTS The serum level of Vit D significantly decreased in asthmatic patients versus controls (16.26 ± 6.76 vs 23.05 ± 10.57 ng/mL, P value = .001). We observed an indirect correlation between Vit D and clinical findings. We also found an increased level of serum VDBP in patients as compared to the controls (1044.6 ± 310.82 vs 545.95 ± 121.73 µg/mL, P value < .0001). Besides, the risk of asthma progression was increased in patients with the VDR rs2228570 CC and VDBP rs7041 GG genotypes (OR = 3.56, P = .0382 and OR = 2.58, P = .01, respectively). CONCLUSION In summary, our results explain the influence of the genetic variations in VDR and VDBP in addition to Vit D and VDBP serum concentrations on asthma susceptibility in the Kurdish population.
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Affiliation(s)
- Rasoul Nasiri‐Kalmarzi
- Lung Diseases and Allergy Research CenterResearch Institute for Health DevelopmentKurdistan University of Medical SciencesSanandajIran
- Department of PediatricsFaculty of MedicineKurdistan University of Medical SciencesSanandajIran
| | - Mohammad Abdi
- Cellular and Molecular Research CenterResearch Institute for Health DevelopmentKurdistan University of Medical SciencesSanandajIran
- Department of Clinical BiochemistryFaculty of MedicineKurdistan University of Medical SciencesSanandajIran
| | - Javad Hosseini
- Cellular and Molecular Research CenterResearch Institute for Health DevelopmentKurdistan University of Medical SciencesSanandajIran
| | - Somayeh Tavana
- Cellular and Molecular Research CenterResearch Institute for Health DevelopmentKurdistan University of Medical SciencesSanandajIran
| | - Aram Mokarizadeh
- Department of Research and DevelopmentAsia Jivan Teb Science‐based CompanySanandajIran
| | - Rezgar Rahbari
- Department of Clinical BiochemistryFaculty of MedicineKurdistan University of Medical SciencesSanandajIran
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20
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Mohamed NA, Abdel-Rehim AS. Influence of vitamin D receptor gene FokI and ApaI polymorphisms on glucocorticoid response in patients with asthma. Int Forum Allergy Rhinol 2019; 10:556-563. [PMID: 31863554 DOI: 10.1002/alr.22511] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 11/14/2019] [Accepted: 11/22/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND Glucocorticoid (GC)-resistant asthma, a complex disease phenotype, has a high morbidity and mortality and takes up a disproportionate share of healthcare costs. The aim of this work was to assess serum 25-hydroxyvitamin D (25(OH)VD) levels in steroid-resistant, steroid-sensitive patients with asthma and in healthy controls, and to investigate the association between the vitamin D receptor gene (VDR) FokI and ApaI polymorphisms and GC resistance in patients with asthma. METHODS This case-control study included 70 patients with severe bronchial asthma and 30 apparently healthy controls. Atopic status was determined by skin-prick test reaction to the most common locally-encountered allergens. A GC reversibility test was performed to differentiate between GC-sensitive and GC-resistant asthma. For all subjects, analysis of the VDR FokI and ApaI polymorphisms by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and measurement of serum 25(OH)VD levels by enzyme-linked immunosorbent assay (ELISA) were performed. RESULTS The frequencies of FokI polymorphism genotypes and alleles differed significantly between patients with asthma and controls. The frequencies of the TT genotype and T allele carriers were significantly higher among patients with asthma than among controls, and also among GC-resistant patients with asthma than among GC-sensitive patients with asthma. Additionally, serum 25(OH)VD levels differed significantly among the 3 VDR FokI polymorphic genotypes in GC-resistant patients with asthma; the highest level was detected in the TT genotype. No significant differences in ApaI were found. CONCLUSION We found a possible association between the FokI T allele and GC resistance in patients with asthma. Variations in VDR FokI might also play a role in 25(OH)VD levels.
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Affiliation(s)
- Nesrine A Mohamed
- Department of Clinical Pathology & Immunology, Ain Shams University, Cairo, Egypt
| | - Asmaa S Abdel-Rehim
- Department of Internal Medicine, Faculty of Medicine, Ain Shams University, Cairo, Egypt
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21
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Cyprian F, Lefkou E, Varoudi K, Girardi G. Immunomodulatory Effects of Vitamin D in Pregnancy and Beyond. Front Immunol 2019; 10:2739. [PMID: 31824513 PMCID: PMC6883724 DOI: 10.3389/fimmu.2019.02739] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 11/08/2019] [Indexed: 12/19/2022] Open
Abstract
In addition to its role in calcium homeostasis and bone formation, a modulatory role of the active form of vitamin D on cells of the immune system, particularly T lymphocytes, has been described. The effects of vitamin D on the production and action of several cytokines has been intensively investigated in recent years. In this connection, deficiency of vitamin D has been associated with several autoimmune diseases, including rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), antiphospholipid syndrome (APS), Hashimoto Thyroiditis (HT), and multiple sclerosis (MS). In a successful pregnancy, the maternal immune response needs to adapt to accommodate the semiallogeneic fetus. Disturbances in maternal tolerance are implicated in infertility and pregnancy complications such as miscarriages (RM) and preeclampsia (PE). It is well-known that a subset of T lymphocytes, regulatory T cells (Tregs) exhibit potent suppressive activity, and have a crucial role in curtailing the destructive response of the immune system during pregnancy, and preventing autoimmune diseases. Interestingly, vitamin D deficiency is common in pregnant women, despite the widespread use of prenatal vitamins, and adverse pregnancy outcomes such as RM, PE, intrauterine growth restriction have been linked to hypovitaminosis D during pregnancy. Research has shown that autoimmune diseases have a significant prevalence within the female population, and women with autoimmune disorders are at higher risk for adverse pregnancy outcomes. Provocatively, dysregulation of T cells plays a crucial role in the pathogenesis of autoimmunity, and adverse pregnancy outcomes where these pathologies are also associated with vitamin D deficiency. This article reviews the immunomodulatory role of vitamin D in autoimmune diseases and pregnancy. In particular, we will describe the role of vitamin D from conception until delivery, including the health of the offspring. This review highlights an observational study where hypovitaminosis D was correlated with decreased fertility, increased disease activity, placental insufficiency, and preeclampsia in women with APS.
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Affiliation(s)
- Farhan Cyprian
- Department of Basic Medical Sciences, College of Medicine, Member of QU Health, Qatar University, Doha, Qatar
| | - Eleftheria Lefkou
- Institute of Obstetric Hematology, Perigenesis, Thessaloniki, Greece
| | - Katerina Varoudi
- Institute of Obstetric Hematology, Perigenesis, Thessaloniki, Greece
| | - Guillermina Girardi
- Department of Basic Medical Sciences, College of Medicine, Member of QU Health, Qatar University, Doha, Qatar
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22
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Munkhbayarlakh S, Kao HF, Hou YI, Tuvshintur N, Bayar-Ulzii B, Narantsetseg L, Wang JY, Hsin Wu LS. Vitamin D plasma concentration and vitamin D receptor genetic variants confer risk of asthma: A comparison study of Taiwanese and Mongolian populations. World Allergy Organ J 2019; 12:100076. [PMID: 31719947 PMCID: PMC6838943 DOI: 10.1016/j.waojou.2019.100076] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 09/08/2019] [Accepted: 09/23/2019] [Indexed: 01/16/2023] Open
Abstract
Background Recent reports have suggested that lower vitamin D serum levels are associated with susceptibility to and severity of asthma in different white populations, which may be due to a lack of sunlight exposure, genetic polymorphism of vitamin D pathway genes, and dietary intake. We investigated the associations between vitamin D concentration, genetic polymorphism of the vitamin D receptor (VDR), and asthma traits in Mongolian and Taiwanese populations that inhabited two different geographical areas. Methods In total, 328 Han Taiwanese subjects and 381 Mongolian subjects were enrolled, and their vitamin D serum levels assayed. Genomic DNA of 178 Han Taiwanese subjects and 90 Mongolian subjects was obtained from blood samples. Single-nucleotide polymorphisms (SNPs) of VDR, ApaI (rs7975232), TaqI (rs731236), BsmI (rs1544410) and FokI (rs2228570), were selected for genotyping. Logistic regression analyses were performed to detect an association between allergic asthma status and the interaction of the VDR SNP and serum vitamin D concentration in the case–control samples. Results We observed a significantly lower vitamin D level in the Mongolian subjects as compared with the Taiwanese population. In particular, in the population under 14 years of age, the serum vitamin D level was significantly higher in the Taiwanese population, in both non-asthmatic and asthmatic subjects, than in the Mongolian non-asthmatic and asthmatic subjects, respectively (P < 0.01). Moreover, the vitamin D level in the asthmatic children was significantly lower than that in the non-asthmatic children in both the Taiwanese and Mongolian populations (P < 0.01, respectively). Furthermore, we found that the rs2228570 genotype (OR, 3.763) of the VDR SNP and the vitamin D concentration (lower than 40 ng/ml, OR: 38.938) both contribute to increased susceptibility to bronchial asthma. Conclusion Our results demonstrated an association between vitamin D concentration and the risk of asthma in two populations of differing ethnicity living in different geographical areas. This information implies a potential role of vitamin D in the prevention and treatment of asthma worldwide.
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Affiliation(s)
- Sonomjamts Munkhbayarlakh
- Department of Pulmonology and Allergology, School of Medicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Hui-Fang Kao
- Department of Nursing, National Tainan Junior College of Nursing, Tainan, Taiwan.,Allergy and Clinical Immunology Research (ACIR) Center, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yung-I Hou
- Allergy and Clinical Immunology Research (ACIR) Center, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Graduate Institute of Medical Sciences, China Medical University, Taichung, Taiwan
| | - Naidansuren Tuvshintur
- Department of Pulmonology and Allergology, School of Medicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Batmunkh Bayar-Ulzii
- Department of Pulmonology and Allergology, School of Medicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Logii Narantsetseg
- Department of Pulmonology and Allergology, School of Medicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Jiu Yao Wang
- Graduate Institute of Medical Sciences, China Medical University, Taichung, Taiwan
| | - Lawrence Shih Hsin Wu
- Allergy and Clinical Immunology Research (ACIR) Center, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Graduate Institute of Medical Sciences, China Medical University, Taichung, Taiwan
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23
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Makoui MH, Imani D, Motallebnezhad M, Azimi M, Razi B. Vitamin D receptor gene polymorphism and susceptibility to asthma: Meta-analysis based on 17 case-control studies. Ann Allergy Asthma Immunol 2019; 124:57-69. [PMID: 31654764 DOI: 10.1016/j.anai.2019.10.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 09/24/2019] [Accepted: 10/14/2019] [Indexed: 12/22/2022]
Abstract
BACKGROUND During the last decade, several studies have evaluated the potential association between vitamin D receptor (VDR) gene polymorphism and susceptibility to asthma. In spite of valuable findings, the results are still contradictory. Therefore, a comprehensive meta-analysis not only solves discrepancies but provides a clue for future projects. OBJECTIVE This meta-analysis was performed to identify whether VDR gene polymorphisms (FokI (rs2228570) or TaqI (rs731236) or BsmI (rs1544410) or ApaI (rs7975232)) play a role in the risk of asthma. METHODS Electronic search of Web of Science, Scopus, and PubMed databases were systematically conducted from their inception until June 2019, to identify all published studies. Eligibility of the studies was confirmed by precise inclusion and exclusion criteria, and the resultant studies were analyzed. RESULTS A total of 17 studies concerning VDR gene polymorphisms and asthma risk were included in this meta-analysis. The results of pooled analysis indicated a statistically significant association between FokI SNP (dominant model [OR = 0.78, 95% CI, 0.62-0.98, random effect model] and allelic model [OR = 0.81, 95% CI, 0.67-0.98, random effect model]) and TaqI SNP (homozygote contract model [OR = 0.70, 95% CI, 0.54-0.89]) with asthma risk. Moreover, subgroup analysis showed that ethnicity influences asthma risk in Asian, African, and American populations. The sensitivity analyses confirmed the stability of the results. CONCLUSION This meta-analysis suggests that VDR gene polymorphism is associated with the risk of asthma.
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Affiliation(s)
- Masoud Hassanzadeh Makoui
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Danyal Imani
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Morteza Motallebnezhad
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Immunology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Maryam Azimi
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences (TUMS), Tehran, Iran; Immunology Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Bahman Razi
- Department of Hematology and Blood Banking, School of Medicine, Tarbiat Modares University (TMU), Tehran, Iran.
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24
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Amo G, Martí M, García-Menaya JM, Cordobés C, Cornejo-García JA, Blanca-López N, Canto G, Doña I, Blanca M, Torres MJ, Agúndez JAG, García-Martín E. Identification of Novel Biomarkers for Drug Hypersensitivity After Sequencing of the Promoter Area in 16 Genes of the Vitamin D Pathway and the High-Affinity IgE Receptor. Front Genet 2019; 10:582. [PMID: 31293618 PMCID: PMC6603231 DOI: 10.3389/fgene.2019.00582] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 06/04/2019] [Indexed: 12/16/2022] Open
Abstract
The prevalence of allergic diseases and drug hypersensitivity reactions (DHRs) during recent years is increasing. Both, allergic diseases and DHRs seem to be related to an interplay between environmental factors and genetic susceptibility. In recent years, a large effort in the elucidation of the genetic mechanisms involved in these disorders has been made, mostly based on case-control studies, and typically focusing on isolated SNPs. These studies provide a limited amount of information, which now can be greatly expanded by the complete coverage that Next Generation Sequencing techniques offer. In this study, we analyzed the promoters of sixteen genes related to the Vitamin D pathway and the high-affinity IgE receptor, including FCER1A, MS4A2, FCER1G, VDR, GC, CYP2R1, CYP27A1, CYP27B1, CYP24A1, RXRA, RXRB, RXRG, IL4, IL4R, IL13, and IL13RA1. The study group was composed of patients with allergic rhinitis plus asthma (AR+A), patients with hypersensitivity to beta-lactams (BLs), to NSAIDs including selective hypersensitivity (SH) and cross-reactivity (CR), and healthy controls without antecedents of atopy or adverse drug reactions. We identified 148 gene variations, 43 of which were novel. Multinomial analyses revealed that three SNPs corresponding to the genes FCER1G (rs36233990 and rs2070901), and GC (rs3733359), displayed significant associations and, therefore, were selected for a combined dataset study in a cohort of 2,476 individuals. The strongest association was found with the promoter FCER1G rs36233990 SNP that alters a transcription factor binding site. This SNP was over-represented among AR+A patients and among patients with IgE-mediated diseases, as compared with control individuals or with the rest of patients in this study. Classification models based on the above-mentioned SNPs were able to predict correct clinical group allocations in patients with DHRs, and patients with IgE-mediated DHRs. Our findings reveal gene promoter SNPs that are significant predictors of drug hypersensitivity, thus reinforcing the hypothesis of a genetic predisposition for these diseases.
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Affiliation(s)
- Gemma Amo
- University Institute of Molecular Pathology Biomarkers, UEx, Cáceres, Spain.,ARADyAL Instituto de Salud Carlos III, Cáceres, Spain
| | - Manuel Martí
- University Institute of Molecular Pathology Biomarkers, UEx, Cáceres, Spain.,ARADyAL Instituto de Salud Carlos III, Cáceres, Spain
| | - Jesús M García-Menaya
- Allergy Service, Badajoz University Hospital, Badajoz, Spain.,ARADyAL Instituto de Salud Carlos III, Badajoz, Spain
| | - Concepción Cordobés
- Allergy Service, Mérida Hospital, Badajoz, Spain.,ARADyAL Instituto de Salud Carlos III, Cáceres, Spain
| | - José A Cornejo-García
- Research Laboratory, IBIMA, Regional University Hospital of Málaga, UMA, Málaga, Spain.,ARADyAL Instituto de Salud Carlos III, Cáceres, Spain
| | - Natalia Blanca-López
- Allergy Service, Infanta Leonor University Hospital, Madrid, Spain.,ARADyAL Instituto de Salud Carlos III, Madrid, Spain
| | - Gabriela Canto
- Allergy Service, Infanta Leonor University Hospital, Madrid, Spain.,ARADyAL Instituto de Salud Carlos III, Madrid, Spain
| | - Inmaculada Doña
- Allergy Unit, IBIMA, Regional University Hospital of Málaga, UMA, Málaga, Spain.,ARADyAL Instituto de Salud Carlos III, Málaga, Spain
| | - Miguel Blanca
- Allergy Service, Infanta Leonor University Hospital, Madrid, Spain.,ARADyAL Instituto de Salud Carlos III, Madrid, Spain
| | - María José Torres
- Allergy Unit, IBIMA, Regional University Hospital of Málaga, UMA, Málaga, Spain.,ARADyAL Instituto de Salud Carlos III, Málaga, Spain
| | - José A G Agúndez
- University Institute of Molecular Pathology Biomarkers, UEx, Cáceres, Spain.,ARADyAL Instituto de Salud Carlos III, Cáceres, Spain
| | - Elena García-Martín
- University Institute of Molecular Pathology Biomarkers, UEx, Cáceres, Spain.,ARADyAL Instituto de Salud Carlos III, Cáceres, Spain
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25
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Kilic M, Ecin S, Taskin E, Sen A, Kara M. The Vitamin D Receptor Gene Polymorphisms in Asthmatic Children: A Case-Control Study. PEDIATRIC ALLERGY IMMUNOLOGY AND PULMONOLOGY 2019; 32:63-69. [PMID: 31508258 DOI: 10.1089/ped.2018.0948] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 02/23/2019] [Indexed: 12/27/2022]
Abstract
Background: The association between vitamin D receptor (VDR) polymorphisms and the risk of asthma remains unclear. This study aimed to investigate the effect of VDR gene polymorphisms and VDR mRNA expression levels on respiratory function, nitric oxide levels in expiratory air, and serum vitamin D levels in children with asthma. Materials and Methods: The study included 80 healthy children (control group) and 100 asthmatic children (asthma group) between the age of 5 and 18 years. The VDR genotypes (ApaI, TaqI, and FokI) and VDR mRNA levels were determined in all groups. Results: There was no statistically significant difference in vitamin D levels between the asthma group and the control group (P > 0.05). A significant association was found between both genotype (CC) of the TaqI polymorphism [odds ratio (OR) = 0.2, 95% confidence interval (CI) (0.07-0.5), P = 0.003] and genotype (CA) of ApaI polymorphisms [OR = 0.2, 95% CI (0.07-0.8), P = 0.02], and asthma risk. In addition, when single-nucleotide polymorphism allelic frequencies between asthma and control groups were compared there is no significant association (P > 0.05). When compared to control group, VDR mRNA expression in asthma group decreased in genotypes CC and CA of ApaI and in genotypes TT and TC of TaqI (P < 0.05). Conclusion: The results provide supporting evidence for an association between TaqI and ApaI polymorphisms and asthma susceptibility.
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Affiliation(s)
- Mehmet Kilic
- Division of Allergy and Immunology, Department of Pediatrics, University of Firat, Elazig, Turkey
| | - Sema Ecin
- Department of Pediatrics, Faculty of Medicine, University of Firat, Elazig, Turkey
| | - Erdal Taskin
- Division of Neonatology, Department of Pediatrics, University of Firat, Elazig, Turkey
| | - Askin Sen
- Department of Genetics, Faculty of Medicine, University of Firat, Elazig, Turkey
| | - Murat Kara
- Department of Genetics, Faculty of Medicine, University of Firat, Elazig, Turkey
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26
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Ramadan A, Sallam SF, Elsheikh MS, Ishak SR, Abdelsayed MG, Salah M, Nazih R, Khairat R, Ibrahim OM. VDR gene expression in asthmatic children patients in relation to vitamin D status and supplementation. GENE REPORTS 2019. [DOI: 10.1016/j.genrep.2019.100387] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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27
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Rajaram M, Selvarajan S, Neelamegan R, Kamalanathan S, Gunaseelan V, Xavier AS, Das S, Karthikeyan V, Saka V, Chandrasekaran A. Effects of genetic polymorphisms in Vitamin D metabolic pathway on Vitamin D level and asthma control in South Indian patients with bronchial asthma. Lung India 2019; 36:483-491. [PMID: 31670295 PMCID: PMC6852217 DOI: 10.4103/lungindia.lungindia_23_19] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Objectives: The study was designed to evaluate the single-nucleotide polymorphisms (SNPs) of genes involved in Vitamin D actions (rs2228570) and metabolic pathways (rs2248137 and rs10766197) and their associations with serum 25-hydroxy Vitamin D (25(OH)D) level and asthma control in South Indian patients with bronchial asthma. Materials and Methods: One hundred and two patients of South Indian origin with bronchial asthma either naive to inhaled corticosteroids (ICSs) or not receiving ICS for ≥1 month were included and were treated with ICS (beclomethasone 200 μg twice daily) for 8 weeks. One hundred and one unrelated healthy South Indians were used as controls. Pulmonary function test and fractional exhaled nitric oxide were used to assess asthma control. Serum 25(OH)D levels (chemiluminescence immunoassay) and SNPs in Vitamin D pathway (real-time polymerase chain reaction) were assessed. The associations of SNPs and serum 25(OH)D with asthma control was determined using linear regression. All analyses were performed using SPSS (version 19) and “SNPStats.” P < 0.05 was considered as statistically significant. Results: Vitamin D receptor (VDR) polymorphism (rs2228570) was found to be protective against asthma (P = 0.022), while there were no significant associations between the other two SNPs and asthma. Similarly, poor correlation and insignificant associations between the SNPs and serum 25(OH)D levels were observed in both cases and controls. There were also insignificant associations between the SNPs and asthma control. Conclusion: VDR polymorphism (rs2228570) was found to be protective against asthma in South Indians, while other genes involved in the metabolic pathway of Vitamin D did not show associations with asthma.
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Affiliation(s)
- Manju Rajaram
- Department of Pulmonary Medicine, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Sandhiya Selvarajan
- Department of Clinical Pharmacology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Revathy Neelamegan
- Department of Pharmacology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Sadishkumar Kamalanathan
- Department of Endocrinology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | | | - Alphienes Stanley Xavier
- Department of Clinical Pharmacology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Saibal Das
- Department of Clinical Pharmacology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Vignesh Karthikeyan
- Centre for Biotechnology, Cell Signaling Laboratory, Anna University, Chennai, Tamil Nadu, India
| | - Vinodkumar Saka
- Department of Pulmonary Medicine, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Adithan Chandrasekaran
- Department of Clinical Pharmacology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
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28
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Al-Daghri NM, Al-Attas OS, Yakout SM, Alnaami AM, Wani K, Alokail MS. The association of serum 25-OH vitamin D with asthma in Saudi adults. Medicine (Baltimore) 2018; 97:e12286. [PMID: 30200174 PMCID: PMC6133535 DOI: 10.1097/md.0000000000012286] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The study aimed to assess the differences and associations of serum 25 (OH)D levels in Saudi adults with and without asthma. A total of 1070 Saudi adults aged 22 to 28 years (359 with known asthma and 711 matched nonasthmatic controls) were selected randomly from the Riyadh Cohort, Saudi Arabia. Serum 25(OH)D serum levels were measured. Asthma diagnosis was taken from questionnaires. In all participants, 359 (33.6%) were known asthmatic and 711 (66.5%) were nonasthmatic. The overall incidence of vitamin D deficiency (serum 25(OH)D <25 nmol/L) was 29.6% in controls and 35.6% in asthma group (P = .01). The asthma group have a significantly lower serum 25(OH)D than the control group (P = .01) but lost significance after adjusting for age, body mass index (BMI), and sex. Nonasthmatic and asthmatic females had a higher incidence of vitamin D deficiency (33% and 46%) than nonasthmatic and asthmatic males (17% and 33%). Vitamin D deficiency is significantly high among Saudi adults with asthma, but more so among women. Whether vitamin D deficiency exacerbates asthma attack remains to be proven in this population.
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Affiliation(s)
- Nasser M. Al-Daghri
- Biomarkers Research Program
- Prince Mutaib Chair for Biomarkers of Osteoporosis, Biochemistry Department, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Omar S. Al-Attas
- Biomarkers Research Program
- Prince Mutaib Chair for Biomarkers of Osteoporosis, Biochemistry Department, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Sobhy M. Yakout
- Biomarkers Research Program
- Prince Mutaib Chair for Biomarkers of Osteoporosis, Biochemistry Department, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Abdullah M. Alnaami
- Biomarkers Research Program
- Prince Mutaib Chair for Biomarkers of Osteoporosis, Biochemistry Department, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Kaiser Wani
- Biomarkers Research Program
- Prince Mutaib Chair for Biomarkers of Osteoporosis, Biochemistry Department, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Majed S. Alokail
- Biomarkers Research Program
- Prince Mutaib Chair for Biomarkers of Osteoporosis, Biochemistry Department, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
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29
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Abstract
Vitamin D exerts several immunological functions in addition to its homeostatic functions on calcium and bone metabolism. Current data show that relative vitamin D deficiency (< 75 nmol/l 25-hydroxyvitamin D) as well as acquired seasonal vitamin D deficiency (< 50 nmol/l) are frequent in Germany. As confirmed by our own data, UV exposure plays a major role for maintenance of vitamin D status, e.g., in patients with UV-triggered diseases, vitamin D deficiency is more frequent, even throughout the year. The beneficial impact of vitamin D on immune functions is highlighted by epidemiologic, genetic, and experimental evidence. In the past years, numerous publications have presented associations between vitamin D deficiency, on the one hand, and severity and prevalence of allergic asthma in children and adults, on the other hand.
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30
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Cieślińska A, Kostyra E, Fiedorowicz E, Snarska J, Kordulewska N, Kiper K, Savelkoul HFJ. Single Nucleotide Polymorphisms in the Vitamin D Receptor Gene ( VDR) May Have an Impact on Acute Pancreatitis (AP) Development: A Prospective Study in Populations of AP Patients and Alcohol-Abuse Controls. Int J Mol Sci 2018; 19:E1919. [PMID: 29966312 PMCID: PMC6073954 DOI: 10.3390/ijms19071919] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 06/25/2018] [Accepted: 06/27/2018] [Indexed: 02/06/2023] Open
Abstract
Vitamin D imbalance is suggested to be associated with the development of pancreatitis. Single nucleotide polymorphisms (SNPs), Apa-1, Bsm-1, Fok-1, and Taq-1, in the vitamin D receptor gene (VDR) are known in various diseases, but not yet in pancreatitis. The aim of this study was to explore possible associations of the four SNPs in the VDR receptor gene in a population of acute pancreatitis patients and alcohol-abuse controls, and to investigate the association with acute pancreatitis (AP) susceptibility. The study population (n = 239) included acute pancreatitis patients (n = 129) and an alcohol-abuse control group (n = 110). All patients met the Diagnostic and Statistical Manual of Mental Disorders (DSM IV) criteria for alcohol dependence. DNA was extracted from peripheral leukocytes and analyzed for VDR polymorphisms using a polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. Odd ratios (ORs) and 95% confidence intervals (CIs) were calculated using logistic regression analysis. To date, we have found allele T in Taq-1 (OR = 2.61; 95% CI: 1.68⁻4.03; p < 0.0001) to be almost three times more frequent in the AP group compared to the alcohol-abuse control patients. Polymorphism Taq-1 occurring in the vitamin D receptor may have an impact on the development of acute pancreatitis due to the lack of the protective role of vitamin D.
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Affiliation(s)
- Anna Cieślińska
- Faculty of Biology and Biotechnology, University of Warmia and Mazury, 10-719 Olsztyn, Poland.
| | - Elżbieta Kostyra
- Faculty of Biology and Biotechnology, University of Warmia and Mazury, 10-719 Olsztyn, Poland.
| | - Ewa Fiedorowicz
- Faculty of Biology and Biotechnology, University of Warmia and Mazury, 10-719 Olsztyn, Poland.
| | - Jadwiga Snarska
- Department of General Surgery, Faculty of Medical Sciences, University of Warmia and Mazury, 10-719 Olsztyn, Poland.
| | - Natalia Kordulewska
- Faculty of Biology and Biotechnology, University of Warmia and Mazury, 10-719 Olsztyn, Poland.
| | - Krzysztof Kiper
- Faculty of Medicine, Rzeszów University, 35-310 Rzeszów, Poland.
| | - Huub F J Savelkoul
- Cell Biology and Immunology Group, Wageningen University, 6700 AG Wageningen, The Netherlands.
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Huo Y, Zhang HY. Genetic Mechanisms of Asthma and the Implications for Drug Repositioning. Genes (Basel) 2018; 9:genes9050237. [PMID: 29751569 PMCID: PMC5977177 DOI: 10.3390/genes9050237] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 04/21/2018] [Accepted: 04/26/2018] [Indexed: 12/20/2022] Open
Abstract
Asthma is a chronic disease that is caused by airway inflammation. The main features of asthma are airway hyperresponsiveness (AHR) and reversible airway obstruction. The disease is mainly managed using drug therapy. The current asthma drug treatments are divided into two categories, namely, anti-inflammatory drugs and bronchodilators. However, disease control in asthma patients is not very efficient because the pathogenesis of asthma is complicated, inducing factors that are varied, such as the differences between individual patients. In this paper, we delineate the genetic mechanisms of asthma, and present asthma-susceptible genes and genetic pharmacology in an attempt to find a diagnosis, early prevention, and treatment methods for asthma. Finally, we reposition some clinical drugs for asthma therapy, based on asthma genetics.
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Affiliation(s)
- Yue Huo
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan 430070, China.
| | - Hong-Yu Zhang
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan 430070, China.
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Yan M, Li D, Zhao G, Li J, Niu F, Li B, Chen P, Jin T. Genetic polymorphisms of pharmacogenomic VIP variants in the Yi population from China. Gene 2018; 648:54-62. [PMID: 29337087 DOI: 10.1016/j.gene.2018.01.040] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 01/08/2018] [Accepted: 01/09/2018] [Indexed: 11/15/2022]
Abstract
INTRODUCTION Drug response and target therapeutic dosage are different among individuals. The variability is largely genetically determined. With the development of pharmacogenetics and pharmacogenomics, widespread research have provided us a wealth of information on drug-related genetic polymorphisms, and the very important pharmacogenetic (VIP) variants have been identified for the major populations around the world whereas less is known regarding minorities in China, including the Yi ethnic group. Our research aims to screen the potential genetic variants in Yi population on pharmacogenomics and provide a theoretical basis for future medication guidance. MATERIALS AND METHODS In the present study, 80 VIP variants (selected from the PharmGKB database) were genotyped in 100 unrelated and healthy Yi adults recruited for our research. Through statistical analysis, we made a comparison between the Yi and other 11 populations listed in the HapMap database for significant SNPs detection. Two specific SNPs were subsequently enrolled in an observation on global allele distribution with the frequencies downloaded from ALlele FREquency Database. Moreover, F-statistics (Fst), genetic structure and phylogenetic tree analyses were conducted for determination of genetic similarity between the 12 ethnic groups. RESULTS Using the χ2 tests, rs1128503 (ABCB1), rs7294 (VKORC1), rs9934438 (VKORC1), rs1540339 (VDR) and rs689466 (PTGS2) were identified as the significantly different loci for further analysis. The global allele distribution revealed that the allele "A" of rs1540339 and rs9934438 were more frequent in Yi people, which was consistent with the most populations in East Asia. F-statistics (Fst), genetic structure and phylogenetic tree analyses demonstrated that the Yi and CHD shared a closest relationship on their genetic backgrounds. Additionally, Yi was considered similar to the Han people from Shaanxi province among the domestic ethnic populations in China. CONCLUSIONS Our results demonstrated significant differences on several polymorphic SNPs and supplement the pharmacogenomic information for the Yi population, which could provide new strategies for optimizing clinical medication in accordance with the genetic determinants of drug toxicity and efficacy.
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Affiliation(s)
- Mengdan Yan
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, Shaanxi 710069, China; College of Life Science, Northwest University, Xi'an, Shaanxi 710069, China
| | - Dianzhen Li
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, Shaanxi 710069, China; College of Life Science, Northwest University, Xi'an, Shaanxi 710069, China
| | - Guige Zhao
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, Shaanxi 710069, China; College of Life Science, Northwest University, Xi'an, Shaanxi 710069, China
| | - Jing Li
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, Shaanxi 710069, China; College of Life Science, Northwest University, Xi'an, Shaanxi 710069, China
| | - Fanglin Niu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, Shaanxi 710069, China; College of Life Science, Northwest University, Xi'an, Shaanxi 710069, China
| | - Bin Li
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, Shaanxi 710069, China; College of Life Science, Northwest University, Xi'an, Shaanxi 710069, China
| | - Peng Chen
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, Shaanxi 710069, China; College of Life Science, Northwest University, Xi'an, Shaanxi 710069, China
| | - Tianbo Jin
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, Shaanxi 710069, China; College of Life Science, Northwest University, Xi'an, Shaanxi 710069, China; Key Laboratory of Molecular Mechanism and Intervention Research for Plateau Diseases of Tibet Autonomous Region, School of Medicine, Xizang Minzu University, Xianyang, Shaanxi 712082, China; Key Laboratory of High Altitude Environment and Genes Related to Diseases of Tibet Autonomous Region, School of Medicine, Xizang Minzu University, Xianyang, Shaanxi 712082, China; Key Laboratory for Basic Life Science Research of Tibet Autonomous Region, School of Medicine, Xizang Minzu University, Xianyang, Shaanxi 712082, China.
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Dahlin A, Qiu W, Litonjua AA, Lima JJ, Tamari M, Kubo M, Irvin CG, Peters SP, Wu AC, Weiss ST, Tantisira KG. The phosphatidylinositide 3-kinase (PI3K) signaling pathway is a determinant of zileuton response in adults with asthma. THE PHARMACOGENOMICS JOURNAL 2018; 18:665-677. [PMID: 29298996 PMCID: PMC6150906 DOI: 10.1038/s41397-017-0006-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 09/18/2017] [Indexed: 12/31/2022]
Abstract
Variable responsiveness to zileuton, a leukotriene antagonist used to treat asthma, may be due in part to genetic variation. While individual SNPs were previously associated with zileuton-related lung function changes, specific quantitative trait loci (QTLs) and biological pathways that may contribute have not been identified. In this study, we investigated the hypothesis that genetic variation within biological pathways is associated with zileuton response. We performed an integrative QTL mapping and pathway enrichment study to investigate data from a GWAS of zileuton response, in addition to mRNA expression profiles and leukotriene production data from lymphoblastoid cell lines (LCLs) (derived from asthmatics) that were treated with zileuton or ethanol (control). We identified 1060 QTLs jointly associated with zileuton-related differential LTB4 production in LCLs and lung function change in patients taking zileuton, of which eight QTLs were also significantly associated with persistent LTB4 production in LCLs following zileuton treatment (i.e., ‘poor’ responders). Four nominally significant trans-eQTLs were predicted to regulate three candidate genes (SELL, MTF2, and GAL), the expression of which was significantly reduced in LCLs following zileuton treatment. Gene and pathway enrichment analyses of QTL associations identified multiple genes and pathways, predominantly related to phosphatidyl inositol signaling via PI3K. We validated the PI3K pathway activation status in a subset of LCLs demonstrating variable zileuton-related LTB4 production, and show that in contrast to LCLs that responded to zileuton, the PI3K pathway was activated in poor responder LCLs. Collectively, these findings demonstrate a role for the PIK3 pathway and its targets as important determinants of differential responsiveness to zileuton.
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Affiliation(s)
- Amber Dahlin
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
| | - Weiliang Qiu
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Augusto A Litonjua
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | | | | | | | | | - Stephen P Peters
- Wake Forest University Health Science Center, Winston-Salem, NC, USA
| | - Ann C Wu
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Scott T Weiss
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.,Partners Center for Personalized Genetic Medicine, Partners Health Care, Boston, MA, USA
| | - Kelan G Tantisira
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.,University of Vermont, Burlington, VT, USA
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Prenatal vitamin D supplementation reduces risk of asthma/recurrent wheeze in early childhood: A combined analysis of two randomized controlled trials. PLoS One 2017; 12:e0186657. [PMID: 29077711 PMCID: PMC5659607 DOI: 10.1371/journal.pone.0186657] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 10/05/2017] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND We recently published two independent randomized controlled trials of vitamin D supplementation during pregnancy, both indicating a >20% reduced risk of asthma/recurrent wheeze in the offspring by 3 years of age. However, neither reached statistical significance. OBJECTIVE To perform a combined analysis of the two trials and investigate whether maternal 25-hydroxy-vitamin D (25(OH)D) level at trial entry modified the intervention effect. METHODS VDAART (N = 806) and COPSAC2010. (N = 581) randomized pregnant women to daily high-dose vitamin D3 (4,000 IU/d and 2,400 IU/d, respectively) or placebo. All women also received a prenatal vitamin containing 400 IU/d vitamin D3. The primary outcome was asthma/recurrent wheeze from 0-3yrs. Secondary end-points were specific IgE, total IgE, eczema and lower respiratory tract infections (LRTI). We conducted random effects combined analyses of the treatment effect, individual patient data (IPD) meta-analyses, and analyses stratified by 25(OH)D level at study entry. RESULTS The analysis showed a 25% reduced risk of asthma/recurrent wheeze at 0-3yrs: adjusted odds ratio (aOR) = 0.74 (95% CI, 0.57-0.96), p = 0.02. The effect was strongest among women with 25(OH)D level ≥30ng/ml at study entry: aOR = 0.54 (0.33-0.88), p = 0.01, whereas no significant effect was observed among women with 25(OH)D level <30ng/ml at study entry: aOR = 0.84 (0.62-1.15), p = 0.25. The IPD meta-analyses showed similar results. There was no effect on the secondary end-points. CONCLUSIONS This combined analysis shows that vitamin D supplementation during pregnancy results in a significant reduced risk of asthma/recurrent wheeze in the offspring, especially among women with 25(OH)D level ≥ 30 ng/ml at randomization, where the risk was almost halved. Future studies should examine the possibility of raising 25(OH)D levels to at least 30 ng/ml early in pregnancy or using higher doses than used in our studies. TRIAL REGISTRATION COPSAC2010: ClinicalTrials.gov NCT00856947; VDAART: ClinicalTrials.gov NCT00920621.
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Vitamin D Receptor Gene Polymorphisms Associated with Childhood Autism. Brain Sci 2017; 7:brainsci7090115. [PMID: 28891930 PMCID: PMC5615256 DOI: 10.3390/brainsci7090115] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 09/02/2017] [Accepted: 09/06/2017] [Indexed: 02/06/2023] Open
Abstract
Background: Autism spectrum disorder (ASD) is a group of heterogeneous, behaviorally defined disorders whereby currently no biological markers are common to all affected individuals. A deregulated immune response may be contributing to the etiology of ASD. The active metabolite of vitamin D3 has an immunoregulatory role mediated by binding to the vitamin D receptor (VDR) in monocyte, macrophages, and lymphocytes. The effects of vitamin D and interaction with the VDR may be influenced by polymorphism in the VDR gene. Methods: Genetic association of four different VDR polymorphisms (Apa-I, Bsm-I, Taq-I, Fok-I) associated with susceptibility to the development of autism in children was investigated. Results: We uniquely found an association between the presence of the T allele at position Taq-I and presence of the a allele at position Apa-I of the VDR gene with decreased ASD incidence. There was also an association between female gender and the presence of the T allele. We found no statistical significant correlation between VDR single nucleotide polymorphisms (SNPs) and vitamin D3 concentration in serum of ASD children. Conclusion: Genetic polymorphism in two SNP in VDR may be correlated with development of ASD symptoms by influencing functionality of vitamin D3 metabolism, while vitamin D3 levels were not significantly different between ASD and non-ASD children.
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Jat KR, Khairwa A. Vitamin D and asthma in children: A systematic review and meta-analysis of observational studies. Lung India 2017; 34:355-363. [PMID: 28671167 PMCID: PMC5504893 DOI: 10.4103/0970-2113.209227] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
There is growing literature suggesting a link between Vitamin D deficiency and asthma in children, but systematic reviews are lacking. The aim of this study is to evaluate the prevalence of Vitamin D deficiency in asthmatic children and to assess the correlations of Vitamin D levels with asthma incidence, asthma control, and lung functions. PubMed, EMBASE, and Cochrane Library were searched for observational studies on asthma and Vitamin D. Two authors independently extracted data. Meta-analysis was performed using the Review Manager Software. A total of 23 (11 case-control, 5 cohort, and 7 cross-sectional) studies enrolling 13,160 participants were included in the review. Overall, Vitamin D deficiency and insufficiency were prevalent in 28.5% and 26.7% children with asthma, respectively. The mean 25-hydroxyvitamin D (25(OH)D) levels (10 studies) were significantly lower in asthmatic children as compared to nonasthmatic children with a mean difference of -9.41 (95% confidence interval [CI] -16.57, -2.25). The odds ratio of Vitamin D deficiency (eight case-control studies) was significantly higher among asthmatic children as compared to nonasthmatic children (odds ratio 3.41; 95% CI 2.04, 5.69). Correlations between Vitamin D levels and incidence of asthma, lung functions, and control of asthma had mixed results. To conclude, asthmatic children had lower 25(OH)D levels as compared to nonasthmatic children, but the correlations between 25(OH)D and asthma incidence, asthma control, and lung functions were varied. Well-designed randomized controlled trials are required to determine if children with asthma can benefit from Vitamin D supplementation.
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Affiliation(s)
- Kana Ram Jat
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Anju Khairwa
- Department of Renal Pathology, Institute of Kidney Diseases and Research Center, Civil Hospital, Ahemdabad, Gujrat, India
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37
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Zhang Y, Wang Z, Ma T. Associations of Genetic Polymorphisms Relevant to Metabolic Pathway of Vitamin D3 with Development and Prognosis of Childhood Bronchial Asthma. DNA Cell Biol 2017; 36:682-692. [PMID: 28590769 DOI: 10.1089/dna.2017.3730] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This study was aimed at investigating the correlation between genetic polymorphisms relevant to metabolic pathway of vitamin D3 (VD3) and susceptibility to childhood bronchial asthma. Altogether 143 childhood patients with bronchial asthma and 143 healthy children of Chinese Han ethnicity were enrolled in this study. The key single-nucleotide polymorphisms (SNPs) were identified by HaploView 4.2 software and selected from previous investigations. Genomic DNAs were isolated from peripheral blood samples by using TaqMan Blood DNA kits. The genotyping of SNPs was performed by TaqMan SNPs genotyping assay. Odds ratios and corresponding 95% confidence intervals were calculated to evaluate the association between SNPs and susceptibility to bronchial asthma. Statistical analyses were conducted by using SPSS 13.0 software. Rs10766197 of CYP2R1, rs7041 and rs4588 of CG, rs4646536 of CYP27B1, rs2228570, rs7975232, and rs1544410 of VDR, as well as rs1805192 and rs10865710 of PPAR were shown to be significantly associated with increased risk of bronchial asthma. Besides, prognosis of childhood bronchial asthma, which was represented as Saint George Respiratory Questionnaire (SGRQ) scoring, was closely linked with CYP2R1 rs10766197, CYP27B1 rs4646536, VDR rs7975232, VDR rs1544410, PPAR rs1805192, and PPAR rs10865710. The haplotype analysis suggested that TA and CG of CG rs7041/rs4588, CA and AG of VDR rs7975232/rs1544410, and CC of PPAR rs1805192/rs10865710 were, respectively, correlated with levels of VD, IL-4, and IL-5. And only haplotypes of VDR showed associations with risk of bronchial asthma during childhood, whereas hardly any significance could be observed between the haplotypes and behavior of quality-of-life (SGRQ) scoring. Significant associations were found between rs10766197 of CYP2R1, rs7041 and rs4588 of CG, rs4646536 of CYP27B1, rs2228570, rs7975232, and rs1544410 of VDR, as well as rs1805192 and rs10865710 of PPAR and susceptibility to and prognosis of childhood bronchial asthma, providing novel targets for treating the disorder.
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Affiliation(s)
- Ying Zhang
- 1 Department of Neonatal Intensive Care Unit, The First People's Hospital of Shangqiu , Shangqiu City, China
| | - Zhansheng Wang
- 1 Department of Neonatal Intensive Care Unit, The First People's Hospital of Shangqiu , Shangqiu City, China
| | - Tongshuai Ma
- 2 Department of Pediatrics, The First People's Hospital of Shangqiu , Shangqiu City, China
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38
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Despotovic M, Jevtovic Stoimenov T, Stankovic I, Basic J, Pavlovic D. Vitamin D Receptor Gene Polymorphisms in Serbian Patients With Bronchial Asthma: A Case-Control Study. J Cell Biochem 2017; 118:3986-3992. [PMID: 28407346 DOI: 10.1002/jcb.26054] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 04/11/2017] [Indexed: 12/20/2022]
Abstract
Vitamin D and single nucleotide polymorphisms (SNPs) in vitamin D receptor (VDR) gene are potentially involved in the pathogenesis of bronchial asthma (BA); however, precise mechanisms by which vitamin D reduces the inflammation and the role of VDR SNPs in BA are not completely understood. The aim of this study was to examine the possible associations of FokI, BsmI, ApaI, and TaqI SNPs with BA. A total of 168 subjects were screened for VDR SNPs using polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) method. The obtained results showed statistically significant differences in the distribution of FokI genotypes (df = 2; P = 0.008) and alleles (P = 0.002; OR = 0.446; 95%CI = 0.264-0.752) between patients and controls. Distributions of BsmI, ApaI, and TaqI genotypes and alleles did not show statistical differences. BsmI, ApaI, and TaqI SNPs are in linkage disequilibrium (LD) in the whole studied group, as well as in BA patients and controls. The strongest LD was observed between BsmI and TaqI (r2 = 0.69 for all subjects in the study; r2 = 0.75 in BA; r2 = 0.64 in controls), while lower values of LD were observed for BsmI and ApaI, and ApaI and TaqI SNPs. This is the first study that examined the association of VDR SNPs (FokI, BsmI, ApaI, and TaqI) in Serbian patients with BA indicating protective effect of FF genotype and F allele of FokI SNP on BA development. J. Cell. Biochem. 118: 3986-3992, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Milena Despotovic
- Faculty of Medicine, Department of Biochemistry, University of Nis, Boulevard dr Zoran Djindjic 81, Nis 18000, Serbia
| | | | - Ivana Stankovic
- Clinic for Pulmonary Diseases and Tuberculosis, Clinical Centre Nis, University of Nis, Nis, Serbia
| | - Jelena Basic
- Faculty of Medicine, Department of Biochemistry, University of Nis, Boulevard dr Zoran Djindjic 81, Nis 18000, Serbia
| | - Dusica Pavlovic
- Faculty of Medicine, Department of Biochemistry, University of Nis, Boulevard dr Zoran Djindjic 81, Nis 18000, Serbia
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Loisel DA, Du G, Ahluwalia TS, Tisler CJ, Evans MD, Myers RA, Gangnon RE, Kreiner-Møller E, Bønnelykke K, Bisgaard H, Jackson DJ, Lemanske RF, Nicolae DL, Gern JE, Ober C. Genetic associations with viral respiratory illnesses and asthma control in children. Clin Exp Allergy 2016; 46:112-24. [PMID: 26399222 DOI: 10.1111/cea.12642] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 08/04/2015] [Accepted: 08/23/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND Viral respiratory infections can cause acute wheezing illnesses in children and exacerbations of asthma. OBJECTIVE We sought to identify variation in genes with known antiviral and pro-inflammatory functions to identify specific associations with more severe viral respiratory illnesses and the risk of virus-induced exacerbations during the peak fall season. METHODS The associations between genetic variation at 326 SNPs in 63 candidate genes and 10 phenotypes related to viral respiratory infection and asthma control were examined in 226 children enrolled in the RhinoGen study. Replication of asthma control phenotypes was performed in 2128 children in the Copenhagen Prospective Study on Asthma in Childhood (COPSAC). Significant associations in RhinoGen were further validated using virus-induced wheezing illness and asthma phenotypes in an independent sample of 122 children enrolled in the Childhood Origins of Asthma (COAST) birth cohort study. RESULTS A significant excess of P values smaller than 0.05 was observed in the analysis of the 10 RhinoGen phenotypes. Polymorphisms in 12 genes were significantly associated with variation in the four phenotypes showing a significant enrichment of small P values. Six of those genes (STAT4, JAK2, MX1, VDR, DDX58, and EIF2AK2) also showed significant associations with asthma exacerbations in the COPSAC study or with asthma or virus-induced wheezing phenotypes in the COAST study. CONCLUSIONS We identified genetic factors contributing to individual differences in childhood viral respiratory illnesses and virus-induced exacerbations of asthma. Defining mechanisms of these associations may provide insight into the pathogenesis of viral respiratory infections and virus-induced exacerbations of asthma.
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Affiliation(s)
- D A Loisel
- Department of Human Genetics, University of Chicago, Chicago, IL, USA.,Department of Biology, Saint Michael's College, Colchester, VT, USA
| | - G Du
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
| | - T S Ahluwalia
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Ledreborg Allé 34, DK-2820, Copenhagen, Denmark.,Steno Diabetes Center, Gentofte, Denmark
| | - C J Tisler
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - M D Evans
- Department of Biostatistics and Medical Informatics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - R A Myers
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
| | - R E Gangnon
- Department of Biostatistics and Medical Informatics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.,Department of Population Health Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - E Kreiner-Møller
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Ledreborg Allé 34, DK-2820, Copenhagen, Denmark
| | - K Bønnelykke
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Ledreborg Allé 34, DK-2820, Copenhagen, Denmark
| | - H Bisgaard
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Ledreborg Allé 34, DK-2820, Copenhagen, Denmark
| | - D J Jackson
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - R F Lemanske
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.,Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - D L Nicolae
- Department of Human Genetics, University of Chicago, Chicago, IL, USA.,Department of Medicine, University of Chicago, Chicago, IL, USA.,Department of Statistics, University of Chicago, Chicago, IL, USA
| | - J E Gern
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - C Ober
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
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40
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Hollams EM, Teo SM, Kusel M, Holt BJ, Holt KE, Inouye M, De Klerk NH, Zhang G, Sly PD, Hart PH, Holt PG. Vitamin D over the first decade and susceptibility to childhood allergy and asthma. J Allergy Clin Immunol 2016; 139:472-481.e9. [PMID: 27726947 DOI: 10.1016/j.jaci.2016.07.032] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 06/29/2016] [Accepted: 07/14/2016] [Indexed: 12/21/2022]
Abstract
BACKGROUND Vitamin D (25(OH)D) deficiency has been implicated as a possible risk factor for asthma development, but studies at selected time points measuring 25(OH)D levels during childhood have yielded conflicting findings. Prospective studies tracking 25(OH)D levels during the initiation phase of asthma in early childhood have not been reported. OBJECTIVE We sought to elucidate relationships between 25(OH)D levels from birth to age 10 years and susceptibility to allergic sensitization, respiratory tract infections, and asthma. METHODS Asthma-, allergy-, and respiratory tract infection-associated phenotypes (including pathogen identification) were characterized in a high-risk birth cohort. Plasma 25(OH)D concentrations were quantified at birth and at clinical follow-ups at the ages of 0.5, 1, 2, 3, 4, 5, and 10 years, and relationships with clinical outcomes were examined. RESULTS Cross-sectional analyses demonstrated inverse associations between 25(OH)D concentrations and the risk for concurrent sensitization at age 0.5, 2, and 3 years, and mixed-effects regression demonstrated inverse longitudinal associations of 25(OH)D levels with both sensitization and eczema. Multivariate regression modeling suggested that the number of 25(OH)D-deficient follow-ups was positively associated with risk for asthma/wheeze, eczema, and sensitization at 10 years; adjustment for sensitization (particularly by 2 years) in the asthma/wheeze models reduced 25(OH)D associations with these latter outcomes. 25(OH)D levels were also inversely associated with early nasopharyngeal colonization with Streptococcus species and age of first febrile lower respiratory illness, both of which are known asthma risk factors. CONCLUSION 25(OH)D deficiency in early childhood is associated with increased risk for persistent asthma, potentially through modulating susceptibility to early allergic sensitization, upper respiratory tract colonization with bacterial pathogens, or both. These relationships are only evident if 25(OH)D status is monitored prospectively and longitudinally.
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Affiliation(s)
- Elysia M Hollams
- Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - Shu Mei Teo
- Centre for Systems Genomics, University of Melbourne, Melbourne, Australia; Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Australia; School of BioSciences, University of Melbourne, Melbourne, Australia
| | - Merci Kusel
- Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - Barbara J Holt
- Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - Kathryn E Holt
- Centre for Systems Genomics, University of Melbourne, Melbourne, Australia; Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Australia
| | - Michael Inouye
- Centre for Systems Genomics, University of Melbourne, Melbourne, Australia; School of BioSciences, University of Melbourne, Melbourne, Australia
| | | | - Guicheng Zhang
- School of Public Health, Curtin University, Perth, Australia
| | - Peter D Sly
- University of Queensland, Brisbane, Australia
| | - Prue H Hart
- Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - Patrick G Holt
- Telethon Kids Institute, University of Western Australia, Perth, Australia; University of Queensland, Brisbane, Australia.
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Al-Barry MA, Albalawi AM, Sayf MA, Badawi A, Afzal S, Latif M, Samman MI, Basit S. Sequence analysis of four vitamin D family genes (VDR, CYP24A1, CYP27B1 and CYP2R1) in Vogt-Koyanagi-Harada (VKH) patients: identification of a potentially pathogenic variant in CYP2R1. BMC Ophthalmol 2016; 16:172. [PMID: 27716192 PMCID: PMC5050582 DOI: 10.1186/s12886-016-0354-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 09/27/2016] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND VKH is a rare autoimmune disease. Decreased level of vitamin D has recently been found to be involved in the pathogenesis of Vogt-Koyanagi-Harada (VKH) disease. This study was designed to screen the vitamin D pathway genes for pathogenic mutations, if any, in VKH patients. METHODS Genomic DNA was extracted from blood samples collected from patients with VKH disease and healthy controls. Entire coding region, exon-intron junctions of four genes were sequenced in DNA from 39 Saudi VKH patients and 50 ethnically matched healthy individuals. All patients and controls were unrelated. RESULTS Vitamin D levels in VKH patients were found either insufficient (21-29 ng/mL) or deficient (<20 ng/mL). Sequencing analysis of the VDR, CYP24A1, CYP27B1 and CYP2R1 detected twelve nucleotide changes in these genes in our cohort of 39 patients; 4 of which were non-coding, 6 were synonymous coding and 2 were non-synonymous coding sequence changes. All synonymous coding variants were benign polymorphisms with no apparent clinical significance. A non-synonymous coding sequence variant (c.2 T > C; p.1Met?) found in VDR is an initiation coding change and was detected in control individuals as well, while another variant (c.852G > A; p.284 M > I) found in CYP2R1 is predicted to be disease causing by mutationtaster software. This potentially pathogenic variant was found in 17 out of 39 VKH patients. CONCLUSIONS Screening of four Vitamin D pathway genes in 39 VKH patients shows that a potentially pathogenic sequence variant in CYP2R1 may cause VKH in a subset of patients. These findings support the previous observation that low vitamin D levels might play a role in VKH pathogenesis and mutations in genes involved in vitamin D anabolism and catabolism might be of importance in VKH pathobiology.
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Affiliation(s)
- Ma'an Abdullah Al-Barry
- College of Medicine, Taibah University Almadinah Almunawarah, Medina, Kingdom of Saudi Arabia.,Magribi Hospital, Almadinah Almunawarah, Medina, Kingdom of Saudi Arabia
| | - Alia M Albalawi
- Center for Genetics and Inherited Diseases, Taibah University Almadinah Almunawarah, Medina, 30001, Kingdom of Saudi Arabia
| | - Mohammed Abu Sayf
- College of Medicine, Taibah University Almadinah Almunawarah, Medina, Kingdom of Saudi Arabia
| | - Abdulrahman Badawi
- College of Medicine, Taibah University Almadinah Almunawarah, Medina, Kingdom of Saudi Arabia
| | - Sibtain Afzal
- Prince Naif Center for Immunology Research, College of Medicine, King Saud University, Riyadh, 11472, Saudi Arabia
| | - Muhammad Latif
- Center for Genetics and Inherited Diseases, Taibah University Almadinah Almunawarah, Medina, 30001, Kingdom of Saudi Arabia
| | - Mohammed I Samman
- Center for Genetics and Inherited Diseases, Taibah University Almadinah Almunawarah, Medina, 30001, Kingdom of Saudi Arabia
| | - Sulman Basit
- Center for Genetics and Inherited Diseases, Taibah University Almadinah Almunawarah, Medina, 30001, Kingdom of Saudi Arabia.
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42
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Limketkai BN, Bechtold ML, Nguyen DL. Vitamin D and the Pathogenesis of Inflammatory Bowel Disease. Curr Gastroenterol Rep 2016; 18:52. [PMID: 27538982 DOI: 10.1007/s11894-016-0526-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Vitamin D has traditionally been known for its role in bone metabolism, but emerging evidence has suggested a broader role for vitamin D in immune regulation. Vitamin D deficiency has been associated with the pathogenesis of diverse autoimmune disorders and has similarly been implicated as a contributor to inflammatory bowel disease. In this review, we discuss animal, in vitro, genetic, and epidemiologic studies that have linked vitamin D deficiency with inflammatory bowel disease pathogenesis or severity. Nonetheless, we present the caveat in interpreting these studies in the context of reverse causation: Does vitamin D deficiency lead to gastrointestinal disease, or does gastrointestinal disease (with related changes in dietary choices, intestinal absorption, nutritional status, lifestyle) lead to vitamin D deficiency?
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Affiliation(s)
- Berkeley N Limketkai
- Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 300 Pasteur Drive, Alway M211, Stanford, CA, 94305, USA.
| | - Matthew L Bechtold
- Division of Gastroenterology and Hepatology, University of Missouri School of Medicine, Columbia, MO, USA
| | - Douglas L Nguyen
- Division of Gastroenterology, University of California, Irvine, CA, USA
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43
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Weiss ST, Litonjua AA. Can we prevent childhood asthma before birth? Summary of the VDAART results so far. Expert Rev Respir Med 2016; 10:1039-40. [PMID: 27564842 DOI: 10.1080/17476348.2016.1227257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Scott T Weiss
- a Channing Division of Network Medicine , Brigham and Women's Hospital , Boston , MA , USA
| | - Augusto A Litonjua
- a Channing Division of Network Medicine , Brigham and Women's Hospital , Boston , MA , USA
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44
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Wei Z, Zhang J, Yu X. Maternal vitamin D status and childhood asthma, wheeze, and eczema: A systematic review and meta-analysis. Pediatr Allergy Immunol 2016; 27:612-9. [PMID: 27145360 DOI: 10.1111/pai.12593] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/29/2016] [Indexed: 01/07/2023]
Abstract
BACKGROUND Maternal vitamin D status has been reported to be associated with childhood allergic diseases. However, this association remains to be fully elucidated. METHODS A systematic review and meta-analysis was conducted using prospective cohort studies that examined the association between maternal vitamin D status and childhood allergic diseases including wheeze, eczema and asthma. We searched electronic databases of PubMed, EMBASE, the Cochrane library, the Wanfang (Chinese) database, the VIP (Chinese) database, and Chinese National Knowledge Infrastructure (CNKI) up to August 2014. Odds ratios and 95% confidence intervals (CIs) from individual studies were synthesized using a fixed effects model. RESULTS Four studies on the association between maternal vitamin D status and childhood asthma (3666 mother-child pairs), four studies on the association between maternal vitamin D status and childhood wheeze (2225 mother-child pairs) and three papers on the association between maternal vitamin D status and childhood eczema (2172 mother-child pairs) met our inclusion criteria. Maternal vitamin D status during pregnancy was associated with childhood eczema (pooled OR=0.904, 95% CI=0.831-0.983). However, the meta-analysis showed no statistical association between maternal vitamin D status and childhood asthma (pooled OR=0.981, 95% CI=0.944-1.019) or childhood wheeze (pooled OR=0.995, 95% CI=0.982-1.009). CONCLUSIONS Our meta-analysis found that lower maternal vitamin D during pregnancy was associated with an increased risk of childhood eczema but was not associated with childhood asthma or wheeze. The role of maternal vitamin D as an important protective factor for the development of childhood eczema remains to be elucidated.
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Affiliation(s)
- Zhenzhen Wei
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated with Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jun Zhang
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated with Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaodan Yu
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated with Shanghai Jiao Tong University School of Medicine, Shanghai, China
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45
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Han JC, Du J, Zhang YJ, Qi GB, Li HB, Zhang YJ, Yu XL. Vitamin D receptor polymorphisms may contribute to asthma risk. J Asthma 2016; 53:790-800. [PMID: 27088875 DOI: 10.3109/02770903.2016.1158267] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ji-Chang Han
- Department of Respiration, Huaihe Hospital of Henan University, Kaifeng, China
| | - Jin Du
- Department of Respiration, Huaihe Hospital of Henan University, Kaifeng, China
| | - Ya-Jun Zhang
- Department of Respiration, Huaihe Hospital of Henan University, Kaifeng, China
| | - Guan-Bin Qi
- Department of Respiration, Huaihe Hospital of Henan University, Kaifeng, China
| | - Hong-Bing Li
- Department of Respiration, Huaihe Hospital of Henan University, Kaifeng, China
| | - Yi Jie Zhang
- Department of Respiration, Huaihe Hospital of Henan University, Kaifeng, China
| | - Xiao-ling Yu
- Department of Respiration, Huaihe Hospital of Henan University, Kaifeng, China
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46
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Chary AV, Hemalatha R, Murali MV, Jayaprakash D, Kumar BD. Association of T-regulatory cells and CD23/CD21 expression with vitamin D in children with asthma. Ann Allergy Asthma Immunol 2016; 116:447-454.e2. [PMID: 27026514 DOI: 10.1016/j.anai.2016.02.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 02/23/2016] [Accepted: 02/29/2016] [Indexed: 01/08/2023]
Abstract
BACKGROUND Children with asthma have low vitamin D levels; however, we do not know whether low vitamin D is associated with impaired T-regulatory (Treg) cell population or high IgE receptors (CD23 and CD21) on B cells. OBJECTIVE To examine Treg cell function, CD23 and CD21 receptors, vitamin D, and vitamin D-regulating enzymes in children with asthma. METHODS Sixty children (2-6 years old) with asthma and 60 age-matched healthy children were selected as study participants. After collecting demographic and clinical data, blood samples were collected. Treg cells and CD23/CD21 expressions were evaluated by flow cytometry, 25-hydroxyvitamin D3 (25[OH]D3) was quantified by high-performance liquid chromatography, and cytokines and total IgE were estimated by enzyme-linked immunosorbent assay. Messenger RNA (mRNA) expressions of FOXP3, CD23, CD21, vitamin D receptors, and vitamin D-regulating enzymes were assessed by reverse transcription-polymerase chain reaction. RESULTS The 25(OH)D3 concentrations and proportion of Treg cells were lower (P < .05) among children with asthma. In contrast, the proportions of B cells with CD23 and CD21 expression were higher (P < .05) in patients with asthma compared with controls. Interleukin 10 and transforming growth factor β were also altered in asthma. The mRNA expression of CD23, CD21, and vitamin D receptors was up-regulated, whereas mRNA expression of vitamin D-regulating enzymes, CYP2R1, CYP27B1, and vitamin D binding protein (except CYP24A1) were up-regulated among children with asthma. CONCLUSION The current study found impaired Treg cell population and high numbers of B cells with IgE receptors (CD23 and CD21) and altered regulatory cytokines in children with asthma, suggesting impaired immune regulation.
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Affiliation(s)
- Anchoju Vijayendra Chary
- Department of Clinical Division, Microbiology and Immunology, National Institute of Nutrition, Hyderabad, Telangana, India
| | - Rajkumar Hemalatha
- Department of Clinical Division, Microbiology and Immunology, National Institute of Nutrition, Hyderabad, Telangana, India.
| | | | - Dodle Jayaprakash
- Department of Technology, Osmania University, Hyderabad, Telangana, India
| | - Bharathraj Dinesh Kumar
- Department of Food and Drug Toxicology, National Institute of Nutrition, Hyderabad, Telangana, India
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Prasad S, Rana RK, Sheth R, Mauskar AV. A Hospital Based Study to Establish the Correlation between Recurrent Wheeze and Vitamin D Deficiency Among Children of Age Group Less than 3 Years in Indian Scenario. J Clin Diagn Res 2016; 10:SC18-21. [PMID: 27042548 DOI: 10.7860/jcdr/2016/17318.7287] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 12/20/2015] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Early childhood wheezing is a heterogeneous condition, which has several phenotypic expressions and a complex relationship with the development of asthma later in life. New studies indicate the prevalence of recurrent wheeze to be associated with Vitamin D deficiency. This has not been explored in Indian settings widely, mandating this exploration. AIM To determine the severity of Vitamin D deficiency and its association with recurrent wheeze in children less than 3 years of age. MATERIALS AND METHODS Consecutive type of non-probability sampling was followed for selection of study subjects with a total sample size to be 122 children in the Hospital setting. A pre- formed, pre- tested, structured interview schedule was used to obtain information. Estimation of 25 (OH) Vitamin D was done using ELISA method. Kit used for estimation was DLD Diagnostika GMBH 25(OH) Vitamin D ELISA from Germany. Standard statistical tools were used including Logistic regression analysis, and ROC curve, p value <0.05 was considered to be statistically significant. SPSS software version 17.0 was used. RESULTS Each 10ng/ml decrease in Vitamin D level is associated with 7.25% greater odds of wheezing. Our study also suggests, exclusive breast feeding and delaying of complementary feeding beyond 6 months of age are significant predictors of Vitamin D deficiency and have indirect association with increased incidence of wheezing in children. CONCLUSION The study concluded that Vitamin D deficiency is associated with increased risk of recurrent wheezing.
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Affiliation(s)
- Santosh Prasad
- Senior Registrar, Department of Pediatrics, Lokmanya Tilak Municipal Medical College and General Hospital Sion Mumbai, Mumbai, Maharasthra, India
| | - Rishabh Kumar Rana
- Epidemiologist, Department of Community Medicine, Life Member Indian Medical Association, International Epidemiological Association (USA) , IAPSM, India
| | - Ronak Sheth
- Senior Registrar, Department of Pediatrics, Lokmanya Tilak Municipal Medical College and General Hospital Sion Mumbai, Mumbai, Maharasthra, India
| | - Anupama V Mauskar
- Addtnl Professor, Department of Pediatrics, Lokmanya Tilak Municipal Medical College and General Hospital Sion Mumbai, Mumbai, Maharasthra, India
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Schedel M, Jia Y, Michel S, Takeda K, Domenico J, Joetham A, Ning F, Strand M, Han J, Wang M, Lucas JJ, Vogelberg C, Kabesch M, O'Connor BP, Gelfand EW. 1,25D3 prevents CD8(+)Tc2 skewing and asthma development through VDR binding changes to the Cyp11a1 promoter. Nat Commun 2016; 7:10213. [PMID: 26750596 PMCID: PMC4712703 DOI: 10.1038/ncomms10213] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 11/13/2015] [Indexed: 12/28/2022] Open
Abstract
Effector CD8+ T cells convert from IFN-γ+ (Tc1) to IL-13+ (Tc2) cells in the presence of IL-4. Underlying regulatory mechanisms are not fully defined. Here, we show that addition of 1,25D3, the active form of vitamin D3, during CD8+ T-cell differentiation prevents IL-4-induced conversion to IL-13-producers. Transfer of 1,25D3-treated CD8+ T cells into sensitized and challenged CD8+-deficient recipients fails to restore development of lung allergic responses. 1,25D3 alters vitamin D receptor (VDR) recruitment to the Cyp11a1 promoter in vitro and in vivo in the presence of IL-4. As a result, protein levels and enzymatic activity of CYP11A1, a steroidogenic enzyme regulating CD8+ T-cell conversion, are decreased. An epistatic effect between CYP11A1 and VDR polymorphisms may contribute to the predisposition to childhood asthma. These data identify a role for 1,25D3 in the molecular programming of CD8+ T-cell conversion to an IL-13-secreting phenotype through regulation of steroidogenesis, potentially governing asthma susceptibility. Type 2 CD8+ T cells (Tc2) play a role in the development of experimental asthma. Here the authors show that 1,25D3, the active form of vitamin D3, can prevent conversion of CD8+T cells to a Tc2 phenotype, reducing asthma susceptibility.
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Affiliation(s)
- Michaela Schedel
- Division of Cell Biology, Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA
| | - Yi Jia
- Division of Cell Biology, Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA
| | - Sven Michel
- University Children's Hospital Regensburg (KUNO), Department of Pediatric Pneumology and Allergy, Steinmetzstrasse 1-3, 93049 Regensburg, Germany.,Department of Pediatric Pneumology, Allergy and Neonatology, Hannover Medical School, Carl-Neuberg-Strasse, 30625 Hannover, Germany
| | - Katsuyuki Takeda
- Division of Cell Biology, Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA
| | - Joanne Domenico
- Division of Cell Biology, Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA
| | - Anthony Joetham
- Division of Cell Biology, Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA
| | - Fangkun Ning
- Division of Cell Biology, Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA
| | - Matthew Strand
- Division of Biostatistics and Bioinformatics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA
| | - Junyan Han
- Division of Cell Biology, Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA
| | - Meiqin Wang
- Division of Cell Biology, Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA
| | - Joseph J Lucas
- Division of Cell Biology, Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA
| | - Christian Vogelberg
- Department of Pediatrics, University Children's Hospital, Technical University, Fetscherstraße 74, 01307 Dresden, Germany
| | - Michael Kabesch
- University Children's Hospital Regensburg (KUNO), Department of Pediatric Pneumology and Allergy, Steinmetzstrasse 1-3, 93049 Regensburg, Germany.,Department of Pediatric Pneumology, Allergy and Neonatology, Hannover Medical School, Carl-Neuberg-Strasse, 30625 Hannover, Germany
| | - Brian P O'Connor
- Division of Cell Biology, Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA.,Center for Genes, Environment and Health, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA.,Department of Immunology and Microbiology, University of Colorado AMC, 13001 E 17th Place, Aurora, Colorado 80045, USA
| | - Erwin W Gelfand
- Division of Cell Biology, Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206, USA
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Rashid MU, Muzaffar M, Khan FA, Kabisch M, Muhammad N, Faiz S, Loya A, Hamann U. Association between the BsmI Polymorphism in the Vitamin D Receptor Gene and Breast Cancer Risk: Results from a Pakistani Case-Control Study. PLoS One 2015; 10:e0141562. [PMID: 26517870 PMCID: PMC4627649 DOI: 10.1371/journal.pone.0141562] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 10/10/2015] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Vitamin D is postulated to decrease the risk of breast cancer by inhibiting cell proliferation via the vitamin D receptor (VDR). Two common single nucleotide polymorphisms (SNPs) in the VDR gene, rs1544410 (BsmI) and rs2228570 (FokI), are inconsistently associated with breast cancer risk in Caucasian populations, while data for Asians are scarce. Here, we investigated the possible contribution of these SNPs to breast cancer risk in Pakistani breast cancer patients and in controls participating in a hospital-based breast cancer case-control study (PAK-BCCC). METHODS Genotyping of the BsmI and FokI SNPs was performed by PCR-based restriction fragment length polymorphism (RFLP) analysis of 463 genetically enriched female breast cancer cases with known BRCA1/2 status and in 1,012 controls from Pakistan. The association between SNP genotypes and breast cancer risk was investigated by logistic regression adjusted for potential breast cancer risk factors and stratified by BRCA1/2 status and family history. Odds ratios (ORs) and 95% confidence intervals (CIs) were reported. RESULTS The b allele of the BsmI was associated with an increased breast cancer risk (per b allele OR 1.28, 95% CI 1.09-1.49, P = 0.003). Subgroup analysis revealed that this effect was restricted to BRCA1/2 non-carriers (per b allele OR 1.33, 95% CI 1.11-1.59, P = 0.002) and was stronger in those who reported a positive family history of breast and/or ovarian cancer (per b allele OR 1.64, 95% CI 1.20-2.22, P = 0.002). No association with breast cancer risk was detected for the FokI SNP. CONCLUSIONS The BsmI polymorphism in the VDR gene may be associated with an increased breast cancer risk in Pakistani women negative for BRCA1/2 germline mutations.
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Affiliation(s)
- Muhammad Usman Rashid
- Department of Basic Sciences Research, Shaukat Khanum Memorial Cancer Hospital and Research Centre (SKMCH & RC), Lahore, Pakistan
- Department of Human Genetics and Molecular Biology, University of Health Sciences, Lahore, Pakistan
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Merium Muzaffar
- Department of Basic Sciences Research, Shaukat Khanum Memorial Cancer Hospital and Research Centre (SKMCH & RC), Lahore, Pakistan
- Department of Physiology, University of Health Sciences, Lahore, Pakistan
| | - Faiz Ali Khan
- Department of Basic Sciences Research, Shaukat Khanum Memorial Cancer Hospital and Research Centre (SKMCH & RC), Lahore, Pakistan
| | - Maria Kabisch
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Noor Muhammad
- Department of Basic Sciences Research, Shaukat Khanum Memorial Cancer Hospital and Research Centre (SKMCH & RC), Lahore, Pakistan
| | - Sabeen Faiz
- Department of Basic Sciences Research, Shaukat Khanum Memorial Cancer Hospital and Research Centre (SKMCH & RC), Lahore, Pakistan
| | - Asif Loya
- Department of Pathology, Shaukat Khanum Memorial Cancer Hospital and Research Centre (SKMCH & RC), Lahore, Pakistan
| | - Ute Hamann
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany
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Vitamin D influences asthmatic pathology through its action on diverse immunological pathways. Ann Am Thorac Soc 2015; 11 Suppl 5:S314-21. [PMID: 25525739 DOI: 10.1513/annalsats.201405-204aw] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The prevalence of vitamin D insufficiency and deficiency has increased markedly in recent decades to current epidemic levels (Hyppönen E, et al. Am J Clin Nutr 2007;85:860-868). In parallel, there has been an increase in the incidence of a range of immune-mediated conditions ranging from cancer to autoimmune and respiratory diseases, including chronic obstructive pulmonary disease and asthma (Holick MF. N Engl J Med 2007;357:266-281; Finklea et al. Adv Nutr 2011;2:244-253). There is also an association with increased respiratory infections, which are the most common cause of asthma exacerbations (Finklea et al. Adv Nutr 2011;2:244-253). Together, this has resulted in considerable interest in the therapeutic potential of vitamin D to prevent and improve treatment of asthma and other respiratory diseases. To this end, data from clinical trials involving supplementation with active vitamin D, or more commonly a precursor, are starting to emerge. This review considers mechanisms by which vitamin D may act on the immune system to dampen inappropriate inflammatory responses in the airway while also promoting tolerance and antimicrobial defense mechanisms that collectively maintain respiratory health.
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