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Laaribi AB, Mehri A, Yahia HB, Chaouch H, Babay W, Letaief A, Ouzari HI, Hannachi N, Boukadida J, Zidi I. Association of HLA-G 3'UTR polymorphisms with hepatitis B virus infection in Tunisian population. Immunol Res 2024:10.1007/s12026-024-09516-2. [PMID: 38970627 DOI: 10.1007/s12026-024-09516-2] [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: 02/02/2024] [Accepted: 07/03/2024] [Indexed: 07/08/2024]
Abstract
Hepatitis B virus (HBV) infection is a major public health burden. The mechanisms of immune evasion during chronic HBV (CHB) infection are poorly understood. Human leukocyte antigen (HLA)-G, an immune checkpoint molecule, plays a crucial role in the tolerance mechanisms of various infectious diseases. The 3' untranslated region (3'UTR), including the HLA-G + 3142 C > G polymorphism (rs1063320) and the 14-pb Ins/Del (rs66554220) has been strongly suggested to influence HLA-G expression. This study conducted a case-control analysis to evaluate the potential correlation between the HLA-G + 3142 C > G polymorphism and HBV infection outcome in a Tunisian cohort. The HLA-G + 3142 C > G polymorphism was analysed by PCR-RFLP in 242 patients with chronic HBV infection (116 males and 126 females), 241 healthy controls (116 males and 125 females), and 100 spontaneously resolved subjects (52 males and 48 females). Patients with chronic HBV infection showed a higher frequency of the + 3142G allele compared to healthy controls and spontaneously resolved subjects (p = 0.001 and p = 0.002, respectively). An association between the + 3142G allele and high HBV DNA levels was observed when HBV patients were stratified based on their HBV DNA levels (p = 0.016). Furthermore, the dominant model (GG + GC vs CC) was associated with liver function parameters, including AST, ALT, and high HBV DNA levels (p = 0.04, p < 0.001 and p = 0.002, respectively). However, there was no significant association found between this polymorphism and the fibrosis stage (p = 0.32). The haplotype analysis, using a subset of previously published data on the HLA-G 14-pb Ins/Del polymorphism, revealed an association between the Ins/G haplotype and chronic HBV infection (H1: InsG, p < 0.001). Our findings suggest that the + 3142G allele is a risk factor for the persistence and progression of HBV infection, while the + 3142C allele serves as a protective allele associated with the spontaneous resolution of the infection. Additionally, the HLA-G 3'UTR haplotype Ins/G is associated with chronic HBV infection in the Tunisian population.
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Affiliation(s)
- Ahmed Baligh Laaribi
- Laboratory of Microorganisms and Active Biomolecules (LR03ES03), Sciences Faculty of Tunis, University of Tunis El Manar, Tunis, Tunisia.
| | - Asma Mehri
- Laboratory of Microorganisms and Active Biomolecules (LR03ES03), Sciences Faculty of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Hamza Ben Yahia
- Laboratory of Microorganisms and Active Biomolecules (LR03ES03), Sciences Faculty of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Houda Chaouch
- Department of Internal Medicine and Infectious Diseases, University Hospital Farhat Hached, Sousse, Tunisia
| | - Wafa Babay
- Laboratory of Microorganisms and Active Biomolecules (LR03ES03), Sciences Faculty of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Amel Letaief
- Department of Internal Medicine and Infectious Diseases, University Hospital Farhat Hached, Sousse, Tunisia
| | - Hadda-Imene Ouzari
- Laboratory of Microorganisms and Active Biomolecules (LR03ES03), Sciences Faculty of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Naila Hannachi
- Laboratory of Microbiology (UR12SP34), Faculty of Medicine, University Hospital Farhat Hached, Sousse, Tunisia
| | - Jalel Boukadida
- Laboratory of Microbiology (UR12SP34), Faculty of Medicine, University Hospital Farhat Hached, Sousse, Tunisia
| | - Ines Zidi
- Laboratory of Microorganisms and Active Biomolecules (LR03ES03), Sciences Faculty of Tunis, University of Tunis El Manar, Tunis, Tunisia
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Nagarajan G, Govindan R, Poomarimuthu M, Andiappan R, Elango S, Maruthamuthu S, Mariakuttikan J, Kadiam S. The microbiome and rheumatic heart disease: current knowledge and future perspectives. Acta Cardiol 2023:1-9. [PMID: 37171266 DOI: 10.1080/00015385.2023.2207933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Rheumatic heart disease (RHD) is a cardiovascular disease caused by an autoimmune response to group A Streptococcus (GAS) infection resulting in the damage of heart valves. RHD is the most commonly acquired heart disease among children and young adults with a global burden of over 40 million cases accounting for 306,000 deaths annually. Inflammation in the heart valves caused due to molecular mimicry between the GAS antigens and host cardiac proteins is facilitated by cytokines, cross-reactive antibodies and CD4+ T cells. The complex interaction between genetic and environmental factors linked with erratic events leads to the loss of immunological tolerance and autoimmunity in RHD. Despite extensive research on the etiopathogenesis of RHD, the precise mechanism underpinning the initiation of acute rheumatic fever (ARF) to the progression of RHD still remains elusive. Mounting evidences support the contribution of the human microbiome in the development of several immune-mediated diseases including rheumatoid arthritis, juvenile idiopathic arthritis, Kawasaki disease, inflammatory bowel disease and type 1 diabetes. The microbiome and their metabolites could play a crucial role in the integrity of the epithelial barrier, development of the immune system, inflammation and differentiation of T cell subsets. Consequently, microbiome dysbiosis might result in autoimmunity by molecular mimicry, epitope spreading and bystander activation. This review discusses various aspects of the interaction between the microbiome and the immune system in order to reveal causative links relating dysbiosis and autoimmune diseases with special emphasis on RHD.
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Affiliation(s)
- Gunavathy Nagarajan
- Department of Immunology, School of Biological Sciences, Madurai Kamaraj University, Madurai, India
| | - Ramajayam Govindan
- Multidisciplinary Research Unit, Madurai Medical College, Madurai, India
| | | | - Rathinavel Andiappan
- Department of Cardio Vascular Thoracic Surgery, Madurai Medical College & Government Rajaji Hospital, Madurai, India
| | - Sivakumar Elango
- Institute of Child Health and Research Centre, Madurai Medical College & Government Rajaji Hospital, Madurai, India
| | - Stalinraja Maruthamuthu
- Department of Surgery, Immunogenetics and Transplantation Laboratory, University of California, San Francisco, CA, USA
| | | | - Sony Kadiam
- Department of Immunology, School of Biological Sciences, Madurai Kamaraj University, Madurai, India
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3
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Investigation of the association between HLA-G polymorphisms and obesity. JOURNAL OF SURGERY AND MEDICINE 2022. [DOI: 10.28982/josam.930690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Immunomodulatory Potential of Non-Classical HLA-G in Infections including COVID-19 and Parasitic Diseases. Biomolecules 2022; 12:biom12020257. [PMID: 35204759 PMCID: PMC8961671 DOI: 10.3390/biom12020257] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/23/2022] [Accepted: 01/31/2022] [Indexed: 02/04/2023] Open
Abstract
Human Leukocyte Antigen-G (HLA-G), a polymorphic non-classical HLA (HLA-Ib) with immune-regulatory properties in cancers and infectious diseases, presents both membrane-bound and soluble (sHLA-G) isoforms. Polymorphism has implications in host responses to pathogen infections and in pathogenesis. Differential expression patterns of HLA-G/sHLA-G or its polymorphism seem to be related to different pathological conditions, potentially acting as a disease progression biomarker. Pathogen antigens might be involved in the regulation of both membrane-bound and sHLA-G levels and impact immune responses during co-infections. The upregulation of HLA-G in viral and bacterial infections induce tolerance to infection. Recently, sHLA-G was found useful to identify the prognosis of Coronavirus disease 2019 (COVID-19) among patients and it was observed that the high levels of sHLA-G are associated with worse prognosis. The use of pathogens, such as Plasmodium falciparum, as immune modulators for other infections could be extended for the modulation of membrane-bound HLA-G in COVID-19-infected tissues. Overall, such information might open new avenues concerning the effect of some pathogens such as parasites in decreasing the expression level of HLA-G to restrict pathogenesis in some infections or to influence the immune responses after vaccination among others.
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Ben Salah H, Jelassi R, Zidi I, Ben Amor A, Bizid S, Ammi R, Guizani L, Bouratbine A, Aoun K, Chelbi H. Rapid high-resolution melting method to identify human leukocyte antigen-G (HLA-G) 3' untranslated region polymorphism +3142C/G (rs1063320). Mol Genet Genomic Med 2021; 9:e1817. [PMID: 34605219 PMCID: PMC8606219 DOI: 10.1002/mgg3.1817] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 01/30/2020] [Accepted: 03/05/2020] [Indexed: 01/05/2023] Open
Abstract
Background HLA‐G is a non‐classical class I gene of the human Major Histocompatibility encoding molecules with immune‐modulatory properties. Expression of HLA‐G is being largely studied in pathological conditions, such as tumors, viral infections, inflammation, and autoimmune diseases, grafted tissues, among others. HLA‐G +3142C/G (rs1063320: dbSNP database) polymorphism is located in 3′ UTR of HAL‐G and plays a key role in determining the magnitude of gene and protein expression. The detection of HLA‐G +3142C/G polymorphism in the most published report is done through polymerase chain reaction followed by enzymatic digestion. Therefore, it is so interesting to develop a rapid and sensitive assay to genotype HLA‐G +3142C/G polymorphism. High‐resolution melt analysis (HRM) is a technology that is based on the analysis of the melting profile of PCR products through gradual temperature increase. The aim of this work is to apply high‐resolution melt method for genotyping the HLA‐G +3142C/G polymorphism. Methods DNA from 118 individuals was extracted from whole blood with QIAamp® DNA blood mini kit (Qiagen, Germany). Primer couple was designed using Primer 3 online tools so as to have only one SNP in the target sequence for high HRM efficiency. Positive Controls were identified using DNA sequencing and used as reference when assigning genotypes for trial samples. Results We were able to recognize the three genotypes with similar accuracy than DNA sequencing using high resolution melting method. Hardy‐Weinberg equilibrium test shows that our population is in equilibrium for the studied SNP. Genotypes frequencies of +3142C/G polymorphism in Tunisian general population are 0.475 for heterozygote G/C, 0.186 for homozygote G/G and 0.339 for homozygote C/C. Conclusion HRM is a cost‐effective method suitable for SNP genotyping.
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Affiliation(s)
- Hamza Ben Salah
- Laboratoire de parasitologie médicale, biotechnologies et biomolécules, Institut Pasteur de Tunis LR11IPT06, Tunis, Tunisie.,Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis, Tunisie
| | - Refka Jelassi
- Laboratoire de parasitologie médicale, biotechnologies et biomolécules, Institut Pasteur de Tunis LR11IPT06, Tunis, Tunisie.,Faculté des Sciences de Bizerte, Université de Carthage, Tunis, Tunisie
| | - Ines Zidi
- Laboratoire des microorganismes et biomolécules actives, faculté des Sciences de Tunis, Université de Tunis El-Manar, Tunis, Tunisie
| | - Amor Ben Amor
- Laboratoire de parasitologie médicale, biotechnologies et biomolécules, Institut Pasteur de Tunis LR11IPT06, Tunis, Tunisie.,Emirates College of Technology, Abu Dhabi, UAE
| | - Sondes Bizid
- Service de gastroentérologie, Hôpital militaire de Tunis, Tunis, Tunisie
| | - Radhia Ammi
- Service des consultants externes, Institut Pasteur de Tunis, Tunis, Tunisie
| | - Lamia Guizani
- Laboratoire de parasitologie médicale, biotechnologies et biomolécules, Institut Pasteur de Tunis LR11IPT06, Tunis, Tunisie
| | - Aida Bouratbine
- Laboratoire de parasitologie médicale, biotechnologies et biomolécules, Institut Pasteur de Tunis LR11IPT06, Tunis, Tunisie
| | - Karim Aoun
- Laboratoire de parasitologie médicale, biotechnologies et biomolécules, Institut Pasteur de Tunis LR11IPT06, Tunis, Tunisie
| | - Hanen Chelbi
- Laboratoire de parasitologie médicale, biotechnologies et biomolécules, Institut Pasteur de Tunis LR11IPT06, Tunis, Tunisie
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6
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Machipisa T, Chong M, Muhamed B, Chishala C, Shaboodien G, Pandie S, de Vries J, Laing N, Joachim A, Daniels R, Ntsekhe M, Hugo-Hamman CT, Gitura B, Ogendo S, Lwabi P, Okello E, Damasceno A, Novela C, Mocumbi AO, Madeira G, Musuku J, Mtaja A, ElSayed A, Elhassan HHM, Bode-Thomas F, Okeahialam BN, Zühlke LJ, Mulder N, Ramesar R, Lesosky M, Parks T, Cordell HJ, Keavney B, Engel ME, Paré G. Association of Novel Locus With Rheumatic Heart Disease in Black African Individuals: Findings From the RHDGen Study. JAMA Cardiol 2021; 6:1000-1011. [PMID: 34106200 PMCID: PMC8190704 DOI: 10.1001/jamacardio.2021.1627] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 03/25/2021] [Indexed: 01/02/2023]
Abstract
Importance Rheumatic heart disease (RHD), a sequela of rheumatic fever characterized by permanent heart valve damage, is the leading cause of cardiac surgery in Africa. However, its pathophysiologic characteristics and genetics are poorly understood. Understanding genetic susceptibility may aid in prevention, control, and interventions to eliminate RHD. Objective To identify common genetic loci associated with RHD susceptibility in Black African individuals. Design, Setting, and Participants This multicenter case-control genome-wide association study (GWAS), the Genetics of Rheumatic Heart Disease, examined more than 7 million genotyped and imputed single-nucleotide variations. The 4809 GWAS participants and 116 independent trio families were enrolled from 8 African countries between December 31, 2012, and March 31, 2018. All GWAS participants and trio probands were screened by use of echocardiography. Data analyses took place from May 15, 2017, until March 14, 2021. Main Outcomes and Measures Genetic associations with RHD. Results This study included 4809 African participants (2548 RHD cases and 2261 controls; 3301 women [69%]; mean [SD] age, 36.5 [16.3] years). The GWAS identified a single RHD risk locus, 11q24.1 (rs1219406 [odds ratio, 1.65; 95% CI, 1.48-1.82; P = 4.36 × 10-8]), which reached genome-wide significance in Black African individuals. Our meta-analysis of Black (n = 3179) and admixed (n = 1055) African individuals revealed several suggestive loci. The study also replicated a previously reported association in Pacific Islander individuals (rs11846409) at the immunoglobulin heavy chain locus, in the meta-analysis of Black and admixed African individuals (odds ratio, 1.16; 95% CI, 1.06-1.27; P = 1.19 × 10-3). The HLA (rs9272622) associations reported in Aboriginal Australian individuals could not be replicated. In support of the known polygenic architecture for RHD, overtransmission of a polygenic risk score from unaffected parents to affected probands was observed (polygenic transmission disequilibrium testing mean [SE], 0.27 [0.16] SDs; P = .04996), and the chip-based heritability was estimated to be high at 0.49 (SE = 0.12; P = 3.28 × 10-5) in Black African individuals. Conclusions and Relevance This study revealed a novel candidate susceptibility locus exclusive to Black African individuals and an important heritable component to RHD susceptibility in African individuals.
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Affiliation(s)
- Tafadzwa Machipisa
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
- Hatter Institute for Cardiovascular Diseases Research in Africa and Cape Heart Institute, Department of Medicine, University of Cape Town, Cape Town, South Africa
- Population Health Research Institute, David Braley Cardiac, Vascular and Stroke Research Institute, Hamilton, Ontario, Canada
- Thrombosis and Atherosclerosis Research Institute, David Braley Cardiac, Vascular and Stroke Research Institute, Hamilton, Ontario, Canada
- Department of Pathology and Molecular Medicine, McMaster University, Michael G. DeGroote School of Medicine, Hamilton, Ontario, Canada
| | - Michael Chong
- Population Health Research Institute, David Braley Cardiac, Vascular and Stroke Research Institute, Hamilton, Ontario, Canada
- Thrombosis and Atherosclerosis Research Institute, David Braley Cardiac, Vascular and Stroke Research Institute, Hamilton, Ontario, Canada
- Department of Pathology and Molecular Medicine, McMaster University, Michael G. DeGroote School of Medicine, Hamilton, Ontario, Canada
| | - Babu Muhamed
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
- Hatter Institute for Cardiovascular Diseases Research in Africa and Cape Heart Institute, Department of Medicine, University of Cape Town, Cape Town, South Africa
- Population Health Research Institute, David Braley Cardiac, Vascular and Stroke Research Institute, Hamilton, Ontario, Canada
- Thrombosis and Atherosclerosis Research Institute, David Braley Cardiac, Vascular and Stroke Research Institute, Hamilton, Ontario, Canada
- Department of Pathology and Molecular Medicine, McMaster University, Michael G. DeGroote School of Medicine, Hamilton, Ontario, Canada
| | - Chishala Chishala
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
- Hatter Institute for Cardiovascular Diseases Research in Africa and Cape Heart Institute, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Gasnat Shaboodien
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
- Hatter Institute for Cardiovascular Diseases Research in Africa and Cape Heart Institute, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Shahiemah Pandie
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Jantina de Vries
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Nakita Laing
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Alexia Joachim
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Rezeen Daniels
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Mpiko Ntsekhe
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Christopher T. Hugo-Hamman
- Rheumatic Heart Disease Clinic, Windhoek Central Hospital, Ministry of Health and Social Services, Windhoek, Republic of Namibia
| | - Bernard Gitura
- Cardiology Department of Medicine, Kenyatta National Hospital, University of Nairobi, Nairobi, Kenya
| | - Stephen Ogendo
- Cardiology Department of Medicine, Kenyatta National Hospital, University of Nairobi, Nairobi, Kenya
| | | | | | - Albertino Damasceno
- Faculty of Medicine, Eduardo Mondlane University/Nucleo de Investigaçao, Departamento de Medicina, Hospital Central de Maputo, Maputo, Mozambique
| | - Celia Novela
- Faculty of Medicine, Eduardo Mondlane University/Nucleo de Investigaçao, Departamento de Medicina, Hospital Central de Maputo, Maputo, Mozambique
| | - Ana O. Mocumbi
- Instituto Nacional de Saúde Ministério da Saúde, Maputo, Moçambique
| | - Goeffrey Madeira
- Emergency Department, World Health Organization Mozambique, Maputo, Mozambique
| | - John Musuku
- Department of Paediatrics and Child Health, University Teaching Hospital–Children’s Hospital, University of Zambia, Lusaka, Zambia
| | - Agnes Mtaja
- Department of Paediatrics and Child Health, University Teaching Hospital–Children’s Hospital, University of Zambia, Lusaka, Zambia
| | - Ahmed ElSayed
- Department of Cardiothoracic Surgery, Alshaab Teaching Hospital, Alazhari Health Research Center, Alzaiem Alazhari University, Khartoum, Sudan
| | - Huda H. M. Elhassan
- Department of Cardiothoracic Surgery, Alshaab Teaching Hospital, Alazhari Health Research Center, Alzaiem Alazhari University, Khartoum, Sudan
| | - Fidelia Bode-Thomas
- Department of Paediatrics, Jos University Teaching Hospital and University of Jos, Jos, Plateau State Nigeria
| | - Basil N. Okeahialam
- Department of Paediatrics, Jos University Teaching Hospital and University of Jos, Jos, Plateau State Nigeria
| | - Liesl J. Zühlke
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
- Division of Paediatric Cardiology, Department of Paediatrics and Child Health, Red Cross War Memorial Children’s Hospital and University of Cape Town, South Africa
| | - Nicola Mulder
- Computational Biology Division, Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Raj Ramesar
- Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Maia Lesosky
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Tom Parks
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Heather J. Cordell
- Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Newcastle upon Tyne, United Kingdom
| | - Bernard Keavney
- Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine, and Health, The University of Manchester, Manchester, United Kingdom
- Manchester University National Health Service Foundation Trust, Manchester Academic Health Science CentreManchester, United Kingdom
| | - Mark E. Engel
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Guillaume Paré
- Population Health Research Institute, David Braley Cardiac, Vascular and Stroke Research Institute, Hamilton, Ontario, Canada
- Thrombosis and Atherosclerosis Research Institute, David Braley Cardiac, Vascular and Stroke Research Institute, Hamilton, Ontario, Canada
- Department of Pathology and Molecular Medicine, McMaster University, Michael G. DeGroote School of Medicine, Hamilton, Ontario, Canada
- Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton Ontario, Canada
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7
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Arnaiz-Villena A, Juarez I, Suarez-Trujillo F, López-Nares A, Vaquero C, Palacio-Gruber J, Martin-Villa JM. HLA-G: Function, polymorphisms and pathology. Int J Immunogenet 2020; 48:172-192. [PMID: 33001562 DOI: 10.1111/iji.12513] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 08/04/2020] [Accepted: 08/27/2020] [Indexed: 12/12/2022]
Abstract
HLA-G immune modulatory genes and molecules are presently being studied by a widespread number of research groups. In the present study, we do not aim to be exhaustive since the number of manuscripts published every year is overwhelming. Instead, our aim is pointing out facts about HLA-G function, polymorphism and pathology that have been confirmed by several different researchers, together with exposing aspects that may have been overlooked or not sufficiently remarked in this productive field of study. On the other hand, we question whether performing mainly studies on HLA-G and disease associations is going to give a clear answer in the future, since 40 years of study of classical HLA molecules association with disease has still given no definite answer on this issue.
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Affiliation(s)
- Antonio Arnaiz-Villena
- Departamento de Inmunología, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Ignacio Juarez
- Departamento de Inmunología, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Fabio Suarez-Trujillo
- Departamento de Inmunología, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Adrián López-Nares
- Departamento de Inmunología, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Christian Vaquero
- Departamento de Inmunología, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Jose Palacio-Gruber
- Departamento de Inmunología, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Jose M Martin-Villa
- Departamento de Inmunología, Facultad de Medicina, Universidad Complutense, Madrid, Spain
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8
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Muhamed B, Shaboodien G, Engel ME. Genetic variants in rheumatic fever and rheumatic heart disease. AMERICAN JOURNAL OF MEDICAL GENETICS PART C-SEMINARS IN MEDICAL GENETICS 2020; 184:159-177. [PMID: 32083395 DOI: 10.1002/ajmg.c.31773] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 01/28/2020] [Accepted: 01/28/2020] [Indexed: 12/16/2022]
Abstract
Genetic association studies in rheumatic heart disease (RHD) have the potential to contribute toward our understanding of the pathogenetic mechanism, and may shed light on controversies about RHD etiology. Furthermore, genetic association studies may uncover biomarkers that can be used to identify susceptible individuals, and contribute toward developing vaccine and novel therapeutic targets. Genetic predisposition to rheumatic fever and RHD has been hypothesized by findings from familial studies and observed associations between genes located in the human leukocyte antigens on chromosome 6p21.3 and elsewhere in the genome. We sought to summarize, from published Genetic association studies in RHD, evidence on genetic variants implicated in RHD susceptibility. Using HuGENet™ systematic review methods, we evaluated 66 studies reporting on 42 genes. Existing meta-analyses of candidate gene studies suggest that TGF-β1 [rs1800469], and IL-1β [rs2853550] single nucleotide polymorphisms (SNPs) contribute to susceptibility to RHD, whereas the TNF-α [rs1800629 and rs361525], TGF-β1 [rs1800470 and rs4803457], IL-6 [rs1800795], IL-10 [rs1800896] were not associated with RHD. However, candidate gene studies in RF/RHD are relatively small, thus lacking statistical power to identify reliable and reproducible findings, emphasizing the need for large-scale multicenter studies with different populations.
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Affiliation(s)
- Babu Muhamed
- Department of Medicine, University of Cape Town, Cape Town, South Africa.,Hatter Institute for Cardiovascular Diseases Research in Africa, Observatory, South Africa.,Division of Cardiology, Children's National Health System, Washington, District of Columbia
| | - Gasnat Shaboodien
- Department of Medicine, University of Cape Town, Cape Town, South Africa.,Hatter Institute for Cardiovascular Diseases Research in Africa, Observatory, South Africa
| | - Mark E Engel
- Department of Medicine, University of Cape Town, Cape Town, South Africa
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9
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Rodrigues JKF, Crovella S, Celerino da Silva R. The HLA-G 14 bp allele frequency in different populations: A global meta-analysis. Meta Gene 2020. [DOI: 10.1016/j.mgene.2019.100624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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10
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Kadiam S, Ramasamy T, Ramakrishnan R, Mariakuttikan J. Association of HLA-G 3'UTR 14-bp Ins/Del polymorphism with breast cancer among South Indian women. J Clin Pathol 2019; 73:456-462. [PMID: 31796638 DOI: 10.1136/jclinpath-2019-205772] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 10/22/2019] [Accepted: 11/16/2019] [Indexed: 01/21/2023]
Abstract
AIM Human leucocyte antigen-G (HLA-G) and tumour necrosis factor-alpha (TNF-α) are potent immune mediators implicated in the pathogenesis of breast cancer. The polymorphisms in the 3' untranslated region (3'UTR) of HLA-G and promoter region of TNF-α are well known to influence their expression levels and may consequently contribute to varied disease predisposition. Therefore, in the present study, we explored the effect of HLA-G 3'UTR (14-bp Ins/Del and +3142 C/G) and TNF-α promoter (-238 G/A and -308 G/A) polymorphisms on breast cancer risk among South Indian women. METHODS A total of 342 women (100 patients with breast cancer, 142 patients with benign breast disorder and 100 healthy women volunteers) were enrolled for this study. Genotyping of HLA-G and TNF-α polymorphisms were performed by direct PCR DNA amplification and amplification refractory mutation system PCR methods, respectively. RESULTS Significantly higher frequencies of HLA-G 14-bp Ins allele and Ins/+3142G haplotype were observed in patients with breast cancer than healthy controls (OR=1.56, Pc=0.036) and patients with benign breast disorder (OR=1.47, Pc=0.046). Similarly, subgroup analysis based on age at diagnosis (age≤50 years and >50 years) of breast cancer revealed higher frequencies of 14-bp Ins allele and Ins/+3142G haplotype in the patients of age >50 years than healthy controls (OR=1.77, Pc=0.03). Additionally, the extended haplotypes and multifactor dimensionality reduction analysis of the studied polymorphisms revealed significant contribution of HLA-G 14-bp Ins/Del polymorphism towards breast cancer risk. CONCLUSION The findings of the present study suggest that the HLA-G 14-bp Ins/Del polymorphism could influence breast cancer pathogenesis among South Indian women.
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Affiliation(s)
- Sony Kadiam
- Department of Immunology, Madurai Kamaraj University, Madurai, India
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