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Khan T, Ledoux IM, Aziz F, Al Ali F, Chin-Smith E, Ata M, Karim MY, Marr N. Associations between HLA class II alleles and IgE sensitization to allergens in the Qatar Biobank cohort. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. GLOBAL 2023; 2:100117. [PMID: 37779520 PMCID: PMC10509938 DOI: 10.1016/j.jacig.2023.100117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 01/16/2023] [Accepted: 02/05/2023] [Indexed: 10/03/2023]
Abstract
Background Allergic disorders are the consequence of IgE sensitization to allergens. Population studies have shown that certain human leukocyte antigen (HLA) alleles are associated with increased or decreased risk of developing allergy. Objective We aimed to characterize the relationship between HLA class II allelic diversity and IgE sensitization in an understudied Arab population. Methods We explored associations between IgE sensitization to 7 allergen mixes and mesquite (comprising 41 food or aeroallergens) and 45 common classical HLA class II alleles in a well-defined cohort of 797 individuals representing the general adult population of Qatari nationals and long-term residents. To do so, we performed HLA calling from whole genome sequencing data at 2-field resolution using 2 independent algorithms. We then applied 3 different regression models to assess either each allergen mix independently, in the context of IgE sensitization to other allergens tested, or polysensitization. Results More than half (n = 447) of the study participants showed IgE sensitization to at least 1 allergen, most of them (n = 400) to aeroallergens (Phadiatop). We identified statistically significant negative and positive associations with 24 HLA class II alleles. These have been reported to confer risk or protection from variety of diseases; however, only a few have previously been associated with allergy in other populations. Conclusions Our study reveals several new risk and protective genetic markers for allergen-specific IgE sensitization. This is a first and essential step toward a better understanding of the origins of allergic diseases in this understudied population.
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Affiliation(s)
- Taushif Khan
- Department of Human Immunology, Sidra Medicine, Doha, Qatar
- Department of Computational Science, The Jackson Laboratory, Farmington, Conn
| | | | - Ferdousey Aziz
- the Department of Pathology, Sidra Medicine, Doha, Qatar
| | - Fatima Al Ali
- Department of Human Immunology, Sidra Medicine, Doha, Qatar
| | | | - Manar Ata
- Department of Human Immunology, Sidra Medicine, Doha, Qatar
| | - Mohammed Yousuf Karim
- the Department of Pathology, Sidra Medicine, Doha, Qatar
- the College of Medicine, Qatar University, Doha, Qatar
| | - Nico Marr
- Department of Human Immunology, Sidra Medicine, Doha, Qatar
- the College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar
- Institute of Translational Immunology, Brandenburg Medical School, Brandenburg an der Havel, Germany
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Thibaut D, Walter MR, McGonegal C, Daniel R, Goodman J. Congenital Adrenal Hyperplasia and Human Leukocyte Antigen B: A Meta-Analysis. Cureus 2023; 15:e35900. [PMID: 37033531 PMCID: PMC10081860 DOI: 10.7759/cureus.35900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 03/07/2023] [Indexed: 04/11/2023] Open
Abstract
The link between specific human leukocyte antigen (HLA)-B genes and congenital adrenal hyperplasia (CAH) has been a subject of interest. This study investigates the association between specific HLA-B haplotypes and CAH through a meta-analysis. Google Scholar was used as a database. Articles were included if the research was conducted between 1970 and 2022, was not a meta-analysis, and had odds ratios or enough data points to calculate an odds ratio. The National Institutes of Health (NIH) quality assessment tool of case-control studies was used to evaluate the risk of bias in individual studies, and MetaXL was used to generate data and create a forest plot for analysis. Twelve studies met the selection criteria and were included in the study (641 patients and 3,614 controls). Two HLA-B haplotypes showed increased odds of CAH compared to controls: B14 (OR=3.81; 95%CI=2.88, 5.05; I2=3%) and B35 (OR=1.88; 95%CI=1.22, 2.90; I2=25%). All other HLAs either showed no significant effect or had high heterogeneity. The results suggest that specific HLA-B haplotypes have increased odds of developing CAH, specifically B14 and B35. These findings may prove helpful in the pre- and post-natal diagnosis of CAH as well as the identification of carriers and prediction of patient prognosis.
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Affiliation(s)
- Dylan Thibaut
- Osteopathic Medicine, Lake Erie College of Osteopathic Medicine, Bradenton, USA
| | - Madison R Walter
- Osteopathic Medicine, Lake Erie College of Osteopathic Medicine, Bradenton, USA
| | - Courtney McGonegal
- Osteopathic Medicine, Lake Erie College of Osteopathic Medicine, Bradenton, USA
| | - Ryan Daniel
- Osteopathic Medicine, Lake Erie College of Osteopathic Medicine, Bradenton, USA
| | - Jerry Goodman
- Obstetrics and Gynecology, Lake Erie College of Osteopathic Medicine, Bradenton, USA
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Burek Kamenaric M, Maskalan M, Grubic Z, Stingl Jankovic K, Zunec R. Detection of novel and confirmation of very rare and rare HLA alleles by next generation sequencing in Croatia. HLA 2020; 96:70-75. [PMID: 32301240 DOI: 10.1111/tan.13905] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 04/09/2020] [Accepted: 04/13/2020] [Indexed: 01/28/2023]
Abstract
Routine HLA typing in clinical practice encompassing solid organ and hematopoietic stem cells transplantation programs, disease association typing, volunteer marrow donor typing and population studies, provided a large dataset for studying HLA allele polymorphism in the Croatian population which led to the identification of new, very rare and rare HLA alleles. Over the last 4 years we have identified six new HLA alleles (HLA-A*01:200, A*02:836, A*11:01:01:44, B*08:251, B*18:169 and C*05:46:01:02) and a number of very rare (HLA-B*08:78, DRB1*12:39, DRB1*13:23:02 and DQB1*06:09:04) or rare (HLA-A*24:41, B*39:40:01N, B*51:78:01, DRB1*01:31 and DRB1*14:111) alleles using sequence-based typing methods. The reported data enhance the knowledge about HLA polymorphisms in the Croatian population and provide a foundation for further studies in population genetics.
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Affiliation(s)
- Marija Burek Kamenaric
- Tissue Typing Centre, Clinical Department of Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia
| | - Marija Maskalan
- Tissue Typing Centre, Clinical Department of Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia
| | - Zorana Grubic
- Tissue Typing Centre, Clinical Department of Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia
| | - Katarina Stingl Jankovic
- Tissue Typing Centre, Clinical Department of Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia
| | - Renata Zunec
- Tissue Typing Centre, Clinical Department of Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia
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Jayakrishnan R, Lao Q, Adams SD, Ward WW, Merke DP. Revisiting the association of HLA alleles and haplotypes with CYP21A2 mutations in a large cohort of patients with congenital adrenal hyperplasia. Gene 2019; 687:30-34. [PMID: 30419250 DOI: 10.1016/j.gene.2018.11.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 10/03/2018] [Accepted: 11/08/2018] [Indexed: 11/20/2022]
Abstract
The CYP21A2 gene encoding 21‑hydroxylase is on chromosome 6p21.3 within the human leukocyte antigen (HLA) class III major histocompatibility complex and an association between congenital adrenal hyperplasia (CAH) due to 21‑hydroxylase deficiency and HLA class I and II alleles has been shown in genetically isolated populations. One-third of CAH causing alleles are 30-kb deletions due to homologous recombination events between active and pseudogenes resulting in chimeric genes. The aim of this study was to re-visit the association between the CYP21A2 variants and HLA polymorphisms in a large ethnically diverse cohort of patients with CAH who underwent comprehensive CYP21A2 genotyping, including specification of chimeric gene subtypes (CAH CH-1 through CH-9 of CYP21A1P/CYP21A2 chimeras; CAH-X CH-1 through CH-3 of TNXA/TNXB chimeras) in alleles with 30-kb deletions. The study population included 201 patients (86 males, 115 females, age 3-75 years) with CAH due to 21‑hydroxylase deficiency (159 classic, 42 nonclassic) and 194 parents. Based on the availability of parental genotype, we determined the haplotypes of CYP21A2 mutations and HLA types in 95 probands (190 alleles). Five prevalent haplotype associations were found: p.V281L and B*14-C*08 (P < 0.0001); p.I172N and DQB1*03 (P = 0.035); and of the chimeric genes caused by 30-kb deletions: CH-1 and A*03 (P = 0.033); CH-5 and C*06-DRB1*07 (P < 0.0001); and CAH-X CH-1 and DQB1*03 (P = 0.004). Our findings show that a number of associations between HLA alleles and haplotypes and CYP21A2 mutations, including large 30-kb deletions, exist commonly across ethnicities. These HLA associations may have clinical implications for patients with CAH and may provide insight into the genetics of this highly complex region of the human genome.
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Affiliation(s)
| | - Qizong Lao
- National Institutes of Health Clinical Center, Bethesda, MD 20892, USA
| | - Sharon D Adams
- National Institutes of Health Clinical Center, Bethesda, MD 20892, USA
| | - William W Ward
- National Institutes of Health Clinical Center, Bethesda, MD 20892, USA
| | - Deborah P Merke
- National Institutes of Health Clinical Center, Bethesda, MD 20892, USA; Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA.
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Porriño-Bustamante ML, López-Nevot MÁ, Aneiros-Fernández J, Casado-Ruiz J, García-Linares S, Pedrinacci-Rodríguez S, García-Lora E, Martín-Casares MA, Fernández-Pugnaire MA, Arias-Santiago S. Study of Human Leukocyte Antigen (HLA) in 13 cases of familial frontal fibrosing alopecia: CYP21A2 gene p.V281L mutation from congenital adrenal hyperplasia linked to HLA class I haplotype HLA-A*33:01; B*14:02; C*08:02 as a genetic marker. Australas J Dermatol 2019; 60:e195-e200. [PMID: 30656636 DOI: 10.1111/ajd.12985] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 11/28/2018] [Indexed: 12/26/2022]
Abstract
BACKGROUND/OBJECTIVES The aetiology of frontal fibrosing alopecia is unknown, and its genetic aspect remains uncharacterised. The aim of this report is to elucidate if major histocompatibility complex is associated with familial frontal fibrosing alopecia. METHODS A case-control study was performed of 13 patients with frontal fibrosing alopecia belonging to six families. Their human leukocyte antigen profiles were compared to the data of 636 healthy controls without frontal fibrosing alopecia. Patients underwent high-resolution genomic typing for human leukocyte antigen class I and II loci by PCR-SSO for Luminex. In addition, CYP21A2 gene (major histocompatibility complex class III) mutations were detected by PCR-SSO on strips. RESULTS 61.5% of patients shared CYP21A2 gene p.V281L linked to the F16A human leukocyte antigen class I haplotype (HLA-A*33:01; B*14:02; C*08:02; Pc < 0.000001). The patients F16A-negative shared other human leukocyte antigen class I haplotypes: Y16A (3/13) and S26 (2/13). CONCLUSION CYP21A2 gene p.V281L mutation can be used as a genetic marker for susceptibility to familial frontal fibrosing alopecia. Both the linkage of the mutation to F16A and the fact that F16A-negative patients share other human leukocyte antigen class I haplotype, point to an antigen-driven mechanism in susceptible patients with these haplotypes.
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Affiliation(s)
| | - Miguel Ángel López-Nevot
- Laboratorio Clínico, Unidad de Histocompatibilidad, Hospital Universitario Virgen de las Nieves, Granada, Spain.,Departamento de Bioquímica, Biología Molecular III e Inmunología, Universidad de Granada, Granada, Spain
| | - José Aneiros-Fernández
- Servicio de Anatomía Patológica, Parque Tecnológico de Ciencias de la Salud, Granada, Spain
| | - Jorge Casado-Ruiz
- Departamento de Bioquímica, Biología Molecular III e Inmunología, Universidad de Granada, Granada, Spain
| | - Susana García-Linares
- Unidad de Genética Clínica, Laboratorio Clínico, Hospital Universitario Virgen de las Nieves, Hospital Universitario Virgen de las Nieves, Granada, Spain
| | - Susana Pedrinacci-Rodríguez
- Unidad de Genética Clínica, Laboratorio Clínico, Hospital Universitario Virgen de las Nieves, Hospital Universitario Virgen de las Nieves, Granada, Spain
| | - Elena García-Lora
- Servicio de Dermatología, Hospital Universitario Virgen de las Nieves, Granada, Spain
| | | | | | - Salvador Arias-Santiago
- Servicio de Dermatología, Hospital Universitario Virgen de las Nieves, Granada, Spain.,Facultad de Medicina, Universidad de Granada, Granada, Spain
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