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J. Al –Tamimi B, Al-Mayah QS, Abd-Alwahab HS. Study of HLA-G gene polymorphism and serum level of soluble HLA-G in patients infected with Mycobacterium tuberculosis. BIONATURA 2022; 7:1-5. [DOI: 10.21931/rb/2022.07.03.24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023] Open
Abstract
Tuberculosis affects about one-third of the world population. The incidence of the disease differs significantly among populations living under almost similar conditions, indicating the role of genetic factors. The present study aimed to appraise the impact of HLA-G gene polymorphisms and soluble HLA-G on the susceptibility to pulmonary tuberculosis. 48 patients with pulmonary tuberculosis and other 42 age- and sex-matched healthy individuals were included in the study. Both groups evaluated two gene polymorphisms in the HLA-G gene and soluble HLA-G protein. The frequency of Del/Del genotype of rs66554220 (14-bp Ins/Del) polymorphism in patients was 8.33% which was higher than that of controls (2.38%) with a significant difference (crude OR= 9.26, 95%CI=1.06-80.93, p=0.044). Such association remained significant after adjusting for confounding factors, including smoking, family history, socioeconomic status and residence (adjusted OR= 11.83, 95%CI=2.77-50.51, p= 0.01). The median serum level of soluble HLA-G in patients was 34.0 ng/ml (range 6.18-74.25 ng/ml), which was greater than that of controls (median 20 ng/ml, range 312-71.98 ng/ml) with a significant difference. We can conclude that The Del/Del genotype of rs66554220 (14-bp Ins/Del) polymorphism is an independent risk factor for pulmonary tuberculosis in the Iraqi population
Keywords: Mycobacterium tuberculosis, HLA-G gene, single nucleotide polymorphism
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Affiliation(s)
- Bushra J. Al –Tamimi
- Department of Microbiology, College Medicine, University of Babylon, Babylon- Iraq
| | - Qasim S. Al-Mayah
- Medical Research Unit, College of Medicine, Al-Nahrain University, Baghdad- Iraq
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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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Oztekin O, Cabus U, Enli Y. Decreased serum human leukocyte antigen-G levels are associated with gestational diabetes mellitus. J Obstet Gynaecol Res 2021; 47:2329-2337. [PMID: 33908106 DOI: 10.1111/jog.14811] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 02/21/2021] [Accepted: 04/18/2021] [Indexed: 12/17/2022]
Abstract
AIM This study was designed to determine serum human leukocyte antigen-G (HLA-G) levels and establish whether serum HLA-G level is related with gestational diabetes mellitus (GDM). METHODS Twenty-five GDM patients aged between 24 and 34 years and 24 healthy pregnant women aged between 22 and 33 years were included in this study. Health status of subjects was determined by medical history, physical, and obstetric examinations. Absence of family history for Type 2 diabetes mellitus, absence of diagnosis or clinical evidence of any major disease, and absence of medication use altering glucose metabolism constituted the inclusion criteria. GDM cases who are at their 24-28 weeks of pregnancy and who have not been using any oral hypoglycemic agents were included in GDM group. Control group consisted of healthy pregnant women at their 24-28 weeks of pregnancy. RESULTS Women with GDM had significantly lower levels of serum HLA-G than controls. HLA-G levels were negatively correlated with all parameters of glucose metabolism including insulin (r = - 0.14; p = 0.338), fasting blood glucose (r = - 0.220; p = 0.129), 1-h oral glucose tolerance test (OGTT) blood glucose (r = - 0.18; p = 0.271), 2-h OGTT blood glucose (r = - 0.314; p = 0.172), homeostasis model assessment (r = - 0.226; p = 0.119), HbA1C (r = -0.342; p = 0.108), and WBC (r = -0.149; p = 0.307). There was a negative correlation between HLA-G and BMI (r = -0.341; p = 0.016). CONCLUSION Decreased circulating HLA-G level is found to be associated with insulin resistance and GDM, in this study.
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Affiliation(s)
- Ozer Oztekin
- Department of Obstetrics and Gynecology, School of Medicine, Pamukkale University, Denizli, Turkey
| | - Umit Cabus
- Department of Obstetrics and Gynecology, School of Medicine, Pamukkale University, Denizli, Turkey
| | - Yasar Enli
- Department of Biochemistry, School of Medicine, Pamukkale University, Denizli, Turkey
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Abdul-Hussein SS, Ali EN, Alkhalidi NMF, Zaki NH, Ad’hiah AH. Susceptibility role of soluble HLA-G and HLA-G 14-bp insertion/deletion polymorphism in inflammatory bowel disease. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2020. [DOI: 10.1186/s43042-020-00104-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Abstract
Background
Inflammatory bowel disease (IBD) is a group of chronic inflammatory disorders of the gastrointestinal tract. It is fundamentally related to a dysregulated immune response in the intestinal mucosa against microbiota in genetically predisposed individuals. Among the genetic and immunological factors that are suggested to have role in etiology and pathogenesis of IBD are human leukocyte antigen (HLA)-G molecules. Therefore, soluble HLA-G (sHLA-G) serum level and genetic association with HLA-G 14-bp insertion (Ins)/deletion (Del) polymorphism was analyzed in 100 IBD patients; 50 ulcerative colitis (UC) and 50 Crohn’s disease (CD), and 100 controls.
Results
sHLA-G level was significantly elevated in IBD patients compared to controls (174.7 ± 27.1 vs. 126.8 ± 15.1; corrected probability [pc] < 0.001). The level was also elevated in UC patients compared to CD patients but the difference was not significant (180.5 ± 27.1 vs. 168.9 ± 26.3; p = 0.059). Receiver operating characteristic analysis confirmed the significance of sHLA-G in total IBD, UC, and CD patients (area under curve = 0.944, 0.961, and 0.927, respectively). The genetic association was analyzed under five genetic models (allele, recessive, dominant, overdominant, and codominant). At the allele level, Del allele frequency was significantly increased in total IBD patients (Odds ratio [OR] = 1.93; 95% confidence interval [CI] = 1.27–2.94; pc = 0.018) and CD patients (OR = 2.08; 95% CI = 1.23–3.54; pc = 0.042) compared to controls. Among UC patients, a similar increased frequency was observed, but the pc value was not significance (OR = 1.79; 95% CI = 1.07–3.00; p = 0.031). At the genotypic level, Del/Del genotype was associated with a significantly increased IBD-risk in total patients under codominant model (OR = 4.06; 95% CI = 1.56–10.56; pc = 0.024). sHLA-G level was not influenced by the Ins/Del polymorphism.
Conclusions
This study demonstrated a significant increase in serum level of sHLA-G in UC and CD patients. Further, HLA-G 14-bp Ins/Del polymorphism may be associated with susceptibility to IBD, particularly CD.
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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: 23] [Impact Index Per Article: 5.8] [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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Phoswa WN, Ramsuran V, Naicker T, Singh R, Moodley J. HLA-G Polymorphisms Associated with HIV Infection and Preeclampsia in South Africans of African Ancestry. BIOMED RESEARCH INTERNATIONAL 2020; 2020:1697657. [PMID: 32596279 PMCID: PMC7305545 DOI: 10.1155/2020/1697657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 05/04/2020] [Accepted: 05/25/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVES HLA-G, part of the major histocompatibility complex (MHC), is associated with the risk of developing preeclampsia (PE). In this study, we determined the contribution of specific HLA-G polymorphisms on the risk of developing preeclampsia in HIV-infected and uninfected South Africans of African ancestry. METHODS One hundred and ninety-three women of African ancestry were enrolled (74 HIV-uninfected normotensive, 60 HIV-infected normotensive, 34 HIV-uninfected, and 25 HIV-infected preeclamptics). Sanger sequencing of the untranslated region was performed to genotype six SNPs, i.e., 14 bp Ins/Del of rs66554220, rs1710, rs1063320, rs1610696, rs9380142, and rs1707). RESULTS For rs66554220, we have the following results: (a) based on pregnancy type-the Ins/Ins and Del/Ins genotype frequency was higher in preeclampsia (PE) compared to normotensive pregnancies (Ins/Ins vs. Del/Ins, P = 0.02∗: OR (95%CI) = 13.44 (0.7222-249.9); Del/Del vs. Del/Ins, P = 0.03∗: OR (95%CI) = 2.95 (1.10-7.920)); (b) based on HIV status-the Ins/Ins showed both genotypic and allelic association with HIV infection. HIV-infected PE has higher Ins/Ins genotypic and allelic frequencies compared to HIV-uninfected PE (Ins/Ins vs. Del/Ins, P = 0.005∗∗: OR (95%CI) = 21.32 (1.71-4.17); Ins, P = 0.005∗∗; OR (95%IC) = 21.32 (1.71-4.17)). For rs1707, we have the following results: (a) based on pregnancy type-there were CT genotypic frequencies in PE, more especially LOPE compared to normotensive pregnancies (TT vs. CT, P = 0.0092∗∗: OR (95%CI) = 5.(1.39 - 25.64)), and no allelic association was noted; (b) based on HIV status-CT was higher in HIV-infected LOPE compared to uninfected LOPE (TT vs. TC, P = 0.0006∗∗∗: OR (95%CI) = 40.00 (2.89 - 555.1)). For rs1710 and rs1063320, no significant differences in the genotype and allele frequencies were noted based on pregnancy type and HIV status. For rs9380142, we have the following results: (a) based on pregnancy type-no significant differences were noted between normotensive compared to PE pregnancies; (b) based on HIV status-AA genotypes occurred more in the HIV-infected PE group (AA vs. GG, P = 0.02∗: OR (95%CI) = 13.97 (0.73 - 269.4)), while A allelic frequency occurred more in HIV-infected PE, especially LOPE compared to uninfected groups (A vs. G, P = 0.0003∗∗∗: OR (95%CI) = 10.72 (2.380 - 48.32); P = 0.02∗: OR (95%CI) = 9.00 (1.07 - 75.74)). For rs1610696, we have the following results: (a) based on pregnancy type-genotypic and allelic frequencies of CC were higher in PE compared to normotensive pregnancies (CC vs. GG, P = 0.0003∗∗∗: OR (95%CI) = 31.87 (1.861 - 545.9); C, P = 0.0001∗∗∗: OR (95%IC) = 21.91 (2.84 - 169.0)); (b) based on HIV status-GG frequencies were higher in the HIV-infected PE more especially LOPE groups (GG vs. GC, P = 0.02∗: OR (95%CI) = 16.87 (0.81 - 352.1); GG vs. CC, P = 0.0001∗∗∗: OR (95%CI) = 159.5 (13.10 - 1942)). CONCLUSION Selected HLA-G 14 bp polymorphisms (Ins/Ins) and genotypic and allelic differences in rs9380142, rs1610696, and rs1707 are associated with the pathogenesis of preeclampsia in HIV-infected South African women of African ancestry. More genetic studies evaluating the association between preeclampsia and HIV infection are needed to improve diagnosis and antenatal care.
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Affiliation(s)
- Wendy N. Phoswa
- Discipline of Obstetrics and Gynecology, Nelson R. Mandela School of Clinical Medicine, University of KwaZulu-Natal, Durban, South Africa
| | - Veron Ramsuran
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban, South Africa
- Centre for the AIDS Programme of Research in South Africa (CAPRISA), Durban, South Africa
| | - Thajasvarie Naicker
- Optics and Imaging Centre, University of KwaZulu-Natal, Durban, South Africa
| | - Ravesh Singh
- Department of Microbiology, National Health Laboratory Services, KwaZulu-Natal Academic Complex, Inkosi Albert Luthuli Central Hospital, Durban, South Africa
| | - Jagidesa Moodley
- Women's Health and HIV Research Group, University of KwaZulu-Natal, Durban, South Africa
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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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Sommese L, Benincasa G, Schiano C, Marfella R, Grimaldi V, Sorriento A, Lucchese R, Fiorito C, Sardu C, Nicoletti GF, Napoli C. Genetic and epigenetic-sensitive regulatory network in immune response: a putative link between HLA-G and diabetes. Expert Rev Endocrinol Metab 2019; 14:233-241. [PMID: 31131681 DOI: 10.1080/17446651.2019.1620103] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 05/14/2019] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Human leukocyte antigen-G (HLA-G) gene encodes for a tolerogenic molecule constitutively expressed in human pancreas and upregulated upon inflammatory signals. The 14 bp INS/DEL polymorphism in the 3'UTR of HLA-G may influence the susceptibility for diabetes and coronary heart diseases (CHD), thus suggesting a novel candidate gene. DNA hypomethylation at HLA-G promoter may be a putative useful clinical biomarker for CHD onset. Upregulation of soluble HLA-G isoform (sHLA-G) was detected in prediabetic and diabetic subjects, suggesting a putative role in metabolic dysfunctions. AREAS COVERED We conducted a scoping literature review of genetic and epigenetic-sensitive mechanisms regulating HLA-G in diabetes. English-language manuscripts published between 1997 and 2019, were identified through PubMed, Google Scholar, and Web of Science database searches. After selecting 14 original articles representing case-control studies, we summarized and critically evaluated their main findings. EXPERT COMMENTARY Although epigenetic modifications are involved in the onset of hyperglycemic conditions evolving into diabetes and CHD, it is still difficult to obtain simple and useful clinical biomarkers. Inflammatory-induced KDM6A/INF-β/HLA-G axis might be a part of the epigenetic network leading to overexpression of HLA-G at pancreatic level. Network medicine may show whether HLA-G is involved in diabetes and CHD.
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Affiliation(s)
- Linda Sommese
- a U.O.C. Division of Clinical Immunology, Immunohematology, Transfusion Medicine and Transplant Immunology, Department of Experimental Medicine , Università degli Studi della Campania "Luigi Vanvitelli" , Napoli , Italy
| | - Giuditta Benincasa
- b Clinical Department of Internal Medicine and Specialistics, Department of Advanced Clinical and Surgical Sciences , University of Campania "Luigi Vanvitelli , Naples , Italy
| | | | - Raffaele Marfella
- b Clinical Department of Internal Medicine and Specialistics, Department of Advanced Clinical and Surgical Sciences , University of Campania "Luigi Vanvitelli , Naples , Italy
| | - Vincenzo Grimaldi
- a U.O.C. Division of Clinical Immunology, Immunohematology, Transfusion Medicine and Transplant Immunology, Department of Experimental Medicine , Università degli Studi della Campania "Luigi Vanvitelli" , Napoli , Italy
| | - Antonio Sorriento
- a U.O.C. Division of Clinical Immunology, Immunohematology, Transfusion Medicine and Transplant Immunology, Department of Experimental Medicine , Università degli Studi della Campania "Luigi Vanvitelli" , Napoli , Italy
| | - Roberta Lucchese
- a U.O.C. Division of Clinical Immunology, Immunohematology, Transfusion Medicine and Transplant Immunology, Department of Experimental Medicine , Università degli Studi della Campania "Luigi Vanvitelli" , Napoli , Italy
| | - Carmela Fiorito
- a U.O.C. Division of Clinical Immunology, Immunohematology, Transfusion Medicine and Transplant Immunology, Department of Experimental Medicine , Università degli Studi della Campania "Luigi Vanvitelli" , Napoli , Italy
| | - Celestino Sardu
- b Clinical Department of Internal Medicine and Specialistics, Department of Advanced Clinical and Surgical Sciences , University of Campania "Luigi Vanvitelli , Naples , Italy
| | - Giovanni Francesco Nicoletti
- d Multidisciplinary Department of Medical-Surgical and Dental Specialties , Università degli Studi della Campania "Luigi Vanvitelli" , Naples , Italy
| | - Claudio Napoli
- b Clinical Department of Internal Medicine and Specialistics, Department of Advanced Clinical and Surgical Sciences , University of Campania "Luigi Vanvitelli , Naples , Italy
- c IRCCS SDN , Naples , Italy
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de Almeida BS, Muniz YCN, Prompt AH, Castelli EC, Mendes-Junior CT, Donadi EA. Genetic association between HLA-G 14-bp polymorphism and diseases: A systematic review and meta-analysis. Hum Immunol 2018; 79:724-735. [PMID: 30102938 DOI: 10.1016/j.humimm.2018.08.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 08/09/2018] [Accepted: 08/09/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND HLA-G is an immune checkpoint molecule. Since a differential molecule expression has been reported even for healthy individuals, many studies have focused on polymorphisms at HLA-G regulatory regions, particularly the 3' untranslated region (3'UTR). The presence/absence of a 14-bp sequence was the first polymorphism described and it is the most studied in association between HLA-G and disorders. METHODS In this study, we performed a systematic review and meta-analysis of all association studies published regarding the HLA-G 14-bp. RESULTS We verified association between 14-bp alleles and diseases in the following situations: (1) presence of 14-bp (insertion) conferred susceptibility to preeclampsia (child alleles evaluated) and systemic lupus erythematosus (OR = 1.42; 95%CI = 1.04-1.93; p = 0.026 and OR = 1.13; 95%CI = 1.01-1.27, p = 0.028); (2) 14-bp absence (deletion) was associated with increased risk to breast cancer (OR = 1.23; 95%CI = 1.06-1.43; p = 0.006) and human Cytomegalovirus infection (OR = 2.06; 95%CI = 1.60-2.64; p < 0.0001); and (3) a risk association was observed between the group of reproductive disorders and the 14-bp insertion (OR = 1.12; 95%CI = 1.01-1.24; p = 0.034). CONCLUSIONS Considering that others 14-bp associations were inconclusive and that other variation sites observed at HLA-G 3'UTR exhibit a proven role on post-transcriptional regulation of HLA-G expression, the complete 3'UTR segment should be analyzed in terms of disease susceptibility, instead of a single polymorphism.
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Affiliation(s)
- Bibiana Sgorla de Almeida
- Divisão de Imunologia Clínica, Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), 14049-900 Ribeirão Preto, SP, Brazil; Laboratório Multiusuário de Estudos em Biologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina (UFSC), Florianópolis, Brazil.
| | - Yara Costa Netto Muniz
- Departamento de Biologia Celular, Embriologia e Genética, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina (UFSC), Florianópolis, Brazil.
| | - Alice Heidrich Prompt
- Departamento de Biologia Celular, Embriologia e Genética, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina (UFSC), Florianópolis, Brazil.
| | - Erick C Castelli
- Departamento de Patologia, Faculdade de Medicina de Botucatu, Unesp - Univ. Estadual Paulista, 18618-970 Botucatu, SP, Brazil.
| | - Celso Teixeira Mendes-Junior
- Faculdade de Filosofia Ciências e Letras de Ribeirão Preto (FFCLRP), Universidade de São Paulo (USP), 14049-900 Ribeirão Preto, SP, Brazil.
| | - Eduardo Antonio Donadi
- Divisão de Imunologia Clínica, Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), 14049-900 Ribeirão Preto, SP, Brazil.
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Genre J, Reginaldo FPS, Andrade JMDL, Lima FP, da Camara AVC, Donadi EA, Crispim JC. HLA-G 14-bp Ins/Ins Genotype in Patients Harbouring Helicobacter pylori Infection: A Potential Risk Factor? Scand J Immunol 2016; 83:52-7. [PMID: 26368842 DOI: 10.1111/sji.12390] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 09/08/2015] [Indexed: 01/04/2023]
Abstract
H. pylori is a potent pathogen due to its capacity to successfully evade host defence mechanisms. Despite inducing immune responses in infected individuals, sometimes these responses fail to clear the infection and the bacterium establishes a persistent infection leading to chronic inflammation. In this context, we hypothesized that human leucocyte antigen G (HLA-G), a non-classical major histocompatibility complex molecule that has the ability to regulate immune responses both in physiological and in pathological conditions, may play an important role in promoting tolerance and helping H. pylori to subvert host defence and consequently establish a chronic infection. Therefore, we evaluated the expression of HLA-G 14-bp Ins/Del polymorphism in patients harbouring H. pylori infection, as well as their relationship with histological and demographic variables, to gain a better understanding of the actual role of HLA-G and its genetic polymorphisms in bacterial infection. Sixty-eight patients with clinical symptoms suggestive of H. pylori infection were enrolled to assess HLA-G 14-bp Ins/Del polymorphism allele and genotype frequencies. After adjustment for covariates (age and gender), the odds of having the genotype Ins/Ins, compared to Del/Del, were 3.77 times greater among HP+ cases than among controls. These findings suggest that the 14-bp Ins/Ins genotype, already associated with inflammatory and autoimmune diseases as well as some viral and parasitic infections, could confer a greater risk of developing H. pylori infection.
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Affiliation(s)
- J Genre
- Programa de Pós-graduação em Ciências da Saúde, Centro de Ciências da Saúde. Universidade Federal do Rio Grande do Norte, Natal, Brasil
| | - F P Santos Reginaldo
- Departamento de Análises Clínicas, Centro de Ciências da Saúde. Faculdade de Farmácia, Universidade Federal do Rio Grande do Norte, Natal, Brasil
| | - J Marco de Leon Andrade
- Departamento de Estatística, Instituto de Ciências Exatas, Universidade de Brasília, Brasília, Brasil
| | - F P Lima
- Departamento de Patologia, Centro de Ciências da Saúde. Universidade Federal do Rio Grande do Norte, Natal, Brasil
| | - A V Coutinho da Camara
- Hospital universitário Onofre Lopes. Universidade Federal do Rio Grande do Norte, Natal, Brasil
| | - E A Donadi
- Departamento de Medicina Clínica, Faculdade de Medicina de Ribeirão Preto. Universidade de São Paulo, Ribeirão Preto, Brasil
| | - J C Crispim
- Departamento de Análises Clínicas, Centro de Ciências da Saúde. Faculdade de Farmácia, Universidade Federal do Rio Grande do Norte, Natal, Brasil.,Programa de Pós-graduação em Ciências Farmacêuticas, Centro de Ciências da Saúde. Universidade Federal do Rio Grande do Norte, Natal, Brasil
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HLA-G 14 bp insertion/deletion polymorphism and its association with sHLA-G levels in Behçet’s disease Tunisian patients. Hum Immunol 2016; 77:90-95. [DOI: 10.1016/j.humimm.2015.10.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 08/29/2015] [Accepted: 10/23/2015] [Indexed: 11/22/2022]
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Silva HPV, Ururahy MAG, Souza KSC, Loureiro MB, Oliveira YMC, Oliveira GHM, Luchessi AD, Carvalho KTC, Freitas JCOC, Donadi EA, Hirata RDC, Almeida MG, Arrais RF, Hirata MH, Rezende AA. The association between the HLA-G 14-bp insertion/deletion polymorphism and type 1 diabetes. Genes Immun 2015; 17:13-8. [DOI: 10.1038/gene.2015.45] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 08/07/2015] [Accepted: 09/08/2015] [Indexed: 11/09/2022]
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Liu F, Wang J, Chang H, Lu J, Li H. Relevance between HLA-DP gene rs2281388 polymorphism and hepatocellular carcinoma risk. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2015; 8:7431-7435. [PMID: 26261648 PMCID: PMC4525982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 03/20/2015] [Indexed: 06/04/2023]
Abstract
PURPOSE We carried out this study to find out the relevance between rs2281388 T/C polymorphism of human leukocyte antigen (HLA) gene and hepatocellular carcinoma (HCC) risk in Chinese Han population. METHODS The method of polymerase chain reaction (PCR) was applied to amplify the genomic DNA. Then the PCR products were sequenced to test the HLA-DP gene rs2281388T/C polymorphism of the case and control groups. Odds ratios (ORs) and 95% confidence interval (95% CIs) were utilized to evaluate the potential correlation between rs2281388 variants and HCC risk. RESULTS We analyzed the rs2281388 polymorphism distribution among the clinical pathological features. The results showed that there existed a significant statistic correlation between rs2281388T/C polymorphism of HLA-DP gene and HBsAg feature, and no significant correlation was found between rs2281388 and other clinical features. Further analysis showed that the TT genotype of rs2281388 was significantly correlated with HCC risk, and the same to T allele, but there was no significant difference of CT genotype distribution in case and control groups. CONCLUSION TT genotype and T allele of HLA-DP gene rs2281388 polymorphism may increase the risk of HCC.
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Affiliation(s)
- Fangfeng Liu
- Department of Hepatobiliary Surgery, Shandong Provincial Hospital Affiliated to Shandong University9677 Jingshi Road, Jinan 250021, Shandong, China
| | - Jianlu Wang
- Department of Hepatobiliary Surgery, Shandong Provincial Hospital Affiiated to Shandong University9677 Jingshi Road, Jinan 250021, Shandong, China
| | - Hong Chang
- Department of Hepatobiliary Surgery, Shandong Provincial Hospital Affiliated to Shandong University9677 Jingshi Road, Jinan 250021, Shandong, China
| | - Jun Lu
- Department of Hepatobiliary Surgery, Shandong Provincial Hospital Affiliated to Shandong University9677 Jingshi Road, Jinan 250021, Shandong, China
| | - Hongguang Li
- Department of Hepatobiliary Surgery, Shandong Provincial Hospital Affiliated to Shandong University9677 Jingshi Road, Jinan 250021, Shandong, China
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Rizzo R, Bortolotti D, Bolzani S, Fainardi E. HLA-G Molecules in Autoimmune Diseases and Infections. Front Immunol 2014; 5:592. [PMID: 25477881 PMCID: PMC4235267 DOI: 10.3389/fimmu.2014.00592] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 11/04/2014] [Indexed: 01/22/2023] Open
Abstract
Human leukocyte antigen (HLA)-G molecule, a non-classical HLA-Ib molecule, is less polymorphic when compared to classical HLA class I molecules. Human leukocyte antigen-G (HLA-G) was first detected on cytotrophoblast cells at the feto-maternal interface but its expression is prevalent during viral infections and several autoimmune diseases. HLA-G gene is characterized by polymorphisms at the 3' un-translated region and 5' upstream regulatory region that regulate its expression and are associated with autoimmune diseases and viral infection susceptibility, creating an unbalanced and pathologic environment. This review focuses on the role of HLA-G genetic polymorphisms, mRNA, and protein expression in autoimmune conditions and viral infections.
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Affiliation(s)
- Roberta Rizzo
- Section of Microbiology and Medical Genetics, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Daria Bortolotti
- Section of Microbiology and Medical Genetics, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Silvia Bolzani
- Section of Microbiology and Medical Genetics, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Enrico Fainardi
- Neuroradiology Unit, Department of Neurosciences and Rehabilitation, Azienda Ospedaliera-Universitaria Arcispedale S. Anna, Ferrara, Italy
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