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Wang S, Wang J, Xia Y, Zhang L, Jiang Y, Liu M, Gao Q, Zhang C. Harnessing the potential of HLA-G in cancer therapy: advances, challenges, and prospects. J Transl Med 2024; 22:130. [PMID: 38310272 PMCID: PMC10838004 DOI: 10.1186/s12967-024-04938-w] [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: 11/07/2023] [Accepted: 01/27/2024] [Indexed: 02/05/2024] Open
Abstract
Immune checkpoint blockades have been prized in circumventing and ablating the impediments posed by immunosuppressive receptors, reaching an exciting juncture to be an innovator in anticancer therapy beyond traditional therapeutics. Thus far, approved immune checkpoint blockades have principally targeted PD-1/PD-L1 and CTLA-4 with exciting success in a plethora of tumors and yet are still trapped in dilemmas of limited response rates and adverse effects. Hence, unveiling new immunotherapeutic targets has aroused immense scientific interest in the hope of expanding the clinical application of immune checkpoint blockades to scale new heights. Human leukocyte antigen-G (HLA-G), a non-classical major histocompatibility complex (MHC) class I molecule, is enriched on various malignant cells and is involved in the hindrance of immune effector cells and the facilitation of immunosuppressive cells. HLA-G stands out as a crucial next-generation immune checkpoint showing great promise for the benefit of cancer patients. Here, we provide an overview of the current understanding of the expression pattern and immunological functions of HLA-G, as well as its interaction with well-characterized immune checkpoints. Since HLA-G can be shed from the cell surface or released by various cells as free soluble HLA-G (sHLA-G) or as part of extracellular vesicles (EVs), namely HLA-G-bearing EVs (HLA-GEV), we discuss the potential of sHLA-G and HLA-GEV as predictive biomarkers. This review also addresses the advancement of HLA-G-based therapies in preclinical and clinical settings, with a focus on their clinical application in cancer.
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Affiliation(s)
- Siyuan Wang
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
| | - Jiaxin Wang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
| | - Yu Xia
- Cancer Biology Research Center (Key Laboratory of Chinese Ministry of Education), Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, China
- Department of Gynecology and Obstetrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
| | - Le Zhang
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
| | - Yueqiang Jiang
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
| | - Man Liu
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
| | - Qinglei Gao
- Cancer Biology Research Center (Key Laboratory of Chinese Ministry of Education), Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, China.
- Department of Gynecology and Obstetrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China.
| | - Cuntai Zhang
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China.
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China.
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Shen Y, Zhang R, Jiang X, Yang J. Generation of a blockage monoclonal antibody of LILRB1 against HLA-G. Protein Expr Purif 2024; 213:106363. [PMID: 37683901 DOI: 10.1016/j.pep.2023.106363] [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: 08/03/2023] [Accepted: 09/05/2023] [Indexed: 09/10/2023]
Abstract
Leukocyte immunoglobulin like receptor B1 (LILRB1) is widely expressed in immune cells as an immunosuppressive receptor. Tumor cells highly express the ligand HLA-G, which inhibits the function of immune cells by binding to LILRB1, to achieve immune escape. LILRB1 is a potential immunotherapeutic target. This study developed a monoclonal antibody named B1M023 (B1M023 mAb) that could bind LILRB1 with high affinity at both protein and cellular levels, while not bind to other leukocyte immunoglobulin like receptors (LILRs). Moreover, B1M023 mAb could block the binding of LILRB1 to HLA-G, promote activation and IFN-γ secretion of T cells. These results indicate that B1M023 mAb has potential applications in concomitant diagnosis and tumor immunotherapy.
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Affiliation(s)
- Yunlong Shen
- State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
| | - Ruirui Zhang
- State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
| | - Xiaohua Jiang
- State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
| | - Jinliang Yang
- State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
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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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Yang Y, Wang W, Weng J, Li H, Ma Y, Liu L, Ma W. Advances in the study of HLA class Ib in maternal-fetal immune tolerance. Front Immunol 2022; 13:976289. [PMID: 36105800 PMCID: PMC9465335 DOI: 10.3389/fimmu.2022.976289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/09/2022] [Indexed: 12/05/2022] Open
Abstract
The HLA class Ib molecule is an alloantigen that causes transplant rejection on behalf of individual human and plays an important role in maternal-fetal immune tolerance. Early studies on HLA class Ib focused on the mechanism of HLA-G-induced immune escape, but in recent years, studies on the mechanism of HLA-G have deepened and gradually explored the mechanism of HLA-E and HLA-F, which are also HLA class Ib molecules. In the maternal-fetal interface, trophoblast cells express HLA class Ib molecules to protect the fetus from maternal immune cells by binding to inhibitory receptors of decidual immune cells (DICs) and shifting Th1/Th2 balance toward Th2 bias. Further studies on the molecular mechanism of HLA class Ib molecules provide a reference for its application in the field of clinical assisted reproduction.
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Affiliation(s)
- Yiran Yang
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, School of Pharmaceutical Sciences, Capital Medical University, Beijing, China
| | - Wanning Wang
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, School of Pharmaceutical Sciences, Capital Medical University, Beijing, China
| | - Jing Weng
- School of Basic Medical Sciences, Capital Medical University, Beijing, China
- *Correspondence: Jing Weng, ; Lingyan Liu,
| | - Huifang Li
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Yanmin Ma
- Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Lingyan Liu
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, School of Pharmaceutical Sciences, Capital Medical University, Beijing, China
- *Correspondence: Jing Weng, ; Lingyan Liu,
| | - Wei Ma
- School of Basic Medical Sciences, Capital Medical University, Beijing, China
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Effect of HLA-G5 Immune Checkpoint Molecule on the Expression of ILT-2, CD27, and CD38 in Splenic B cells. J Immunol Res 2022; 2022:4829227. [PMID: 35600048 PMCID: PMC9119744 DOI: 10.1155/2022/4829227] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 04/23/2022] [Indexed: 11/18/2022] Open
Abstract
The human leukocyte antigen G (HLA-G) is an immune checkpoint molecule with a complex network of interactions with several inhibitory receptors. Although the effect of HLA-G on T cells and NK cells is well studied, the effect of HLA-G on B cells is still largely elusive. B cells are of particular interest in the context of the HLA-G-ILT-2 interaction because the ILT-2 receptor is constitutively expressed on most B cells, whereas it is only present on some subsets of T and NK cells. To characterize the effect of HLA-G5 molecules on B cells, we studied splenic B cells derived from cytomegalovirus (CMV) sero-positive donors after CMV stimulation with antigens in the presence and absence of soluble HLA-G5. In the presence of HLA-G5, increased expression of the ITIM-bearing Ig-like transcript (ILT-2) was observed on B cells, but its expression was not affected by stimulation with CMV antigens. Moreover, it became evident that HLA-G5 exposure resulted in a decreased expression of CD27 and CD38 and, accordingly, in lower proportions of CD19+CD27+CD38+ and higher proportions of CD19+CD27-CD38- B cells. Taken together, our in vitro findings demonstrate that soluble HLA-G5 suppresses markers of B cell activation, suggesting that HLA-G5 has an impact on splenic B cell differentiation and activation. Based on these results, further investigation regarding the role of HLA-G as a prognostic factor and a potential therapeutic agent with respect to B cell function appears reasonable.
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Scavuzzi BM, van Drongelen V, Holoshitz J. HLA-G and the MHC Cusp Theory. Front Immunol 2022; 13:814967. [PMID: 35281038 PMCID: PMC8913506 DOI: 10.3389/fimmu.2022.814967] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 02/07/2022] [Indexed: 12/14/2022] Open
Abstract
Human leukocyte antigens (HLA) are significant genetic risk factors in a long list of diseases. However, the mechanisms underlying these associations remain elusive in many cases. The best-characterized function of classical major histocompatibility complex (MHC) antigens is to allow safe presentation of antigenic peptides via a self/non-self-discrimination process. Therefore, most hypotheses to date have posited that the observed associations between certain HLA molecules and human diseases involve antigen presentation (AP). However, these hypotheses often represent inconsistencies with current knowledge. To offer answers to the inconsistencies, a decade ago we have invoked the MHC Cusp theory, postulating that in addition to its main role in AP, the MHC codes for allele-specific molecules that act as ligands in a conformationally-conserved cusp-like fold, which upon interaction with cognate receptors can trigger MHC-associated diseases. In the ensuing years, we have provided empirical evidence that substantiates the theory in several HLA-Class II-associated autoimmune diseases. Notably, in a recent study we have demonstrated that HLA-DRB1 alleles known to protect against several autoimmune diseases encode a protective epitope at the cusp region, which activates anti-inflammatory signaling leading to transcriptional and functional modulatory effects. Relevant to the topic of this session, cusp ligands demonstrate several similarities to the functional effects of HLA-G. The overall goal of this opinion article is to delineate the parallels and distinctive features of the MHC Cusp theory with structural and functional aspects of HLA-G molecules.
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Affiliation(s)
| | - Vincent van Drongelen
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
| | - Joseph Holoshitz
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
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Martín-Villa JM, Vaquero-Yuste C, Molina-Alejandre M, Juarez I, Suárez-Trujillo F, López-Nares A, Palacio-Gruber J, Barrera-Gutiérrez L, Fernández-Cruz E, Rodríguez-Sainz C, Arnaiz-Villena A. HLA-G: Too Much or Too Little? Role in Cancer and Autoimmune Disease. Front Immunol 2022; 13:796054. [PMID: 35154112 PMCID: PMC8829012 DOI: 10.3389/fimmu.2022.796054] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 01/05/2022] [Indexed: 12/12/2022] Open
Abstract
HLA-G is a non-classical HLA class I molecule with immunomodulatory properties. It was initially described at the maternal-fetal interface, and it was later found that this molecule was constitutively expressed on certain immuneprivileged tissues, such as cornea, endothelial and erythroid precursors, and thymus. The immunosuppressive effect of HLA-G is exerted through the interaction with its cognate receptors, expressed on immunocompetent cells, like ILT2, expressed on NK, B, T cells and APCs; ILT4, on APCs; KIR, found on the surface of NK cells; and finally, the co-receptor CD8. Because of these immunomodulatory functions, HLA-G has been involved in several processes, amongst which organ transplantation, viral infections, cancer progression, and autoimmunity. HLA-G neo-expression on tumors has been recently described in several types of malignancies. In fact, tumor progression is tightly linked to the presence of the molecule, as it exerts its tolerogenic function, inhibiting the cells of the immune system and favoring tumor escape. Several polymorphisms in the 3’UTR region condition changes in HLA-G expression (14bp and +3142C/G, among others), which have been associated with both the development and outcome of patients with different tumor types. Also, in recent years, several studies have shown that HLA-G plays an important role in the control of autoimmune diseases. The ability of HLA-G to limit the progression of these diseases has been confirmed and, in fact, levels of the molecule and several of its polymorphisms have been associated with increased susceptibility to the development of autoimmune diseases, as well as increased disease severity. Thus, modulating HLA-G expression in target tissues of oncology patients or patients with autoimmune diseases may be potential therapeutic approaches to treat these pathological conditions.
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Affiliation(s)
- José Manuel Martín-Villa
- Departamento de Inmunología, Oftalmología y ORL, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain.,Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| | - Christian Vaquero-Yuste
- Departamento de Inmunología, Oftalmología y ORL, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Marta Molina-Alejandre
- Departamento de Inmunología, Oftalmología y ORL, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Ignacio Juarez
- Departamento de Inmunología, Oftalmología y ORL, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Fabio Suárez-Trujillo
- Departamento de Inmunología, Oftalmología y ORL, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Adrián López-Nares
- Departamento de Inmunología, Oftalmología y ORL, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - José Palacio-Gruber
- Departamento de Inmunología, Oftalmología y ORL, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Luis Barrera-Gutiérrez
- Departamento de Inmunología, Oftalmología y ORL, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Eduardo Fernández-Cruz
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain.,Servicio de Inmunología, Hospital Universitario Gregorio Marañón, Madrid, Spain
| | - Carmen Rodríguez-Sainz
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain.,Servicio de Inmunología, Hospital Universitario Gregorio Marañón, Madrid, Spain
| | - Antonio Arnaiz-Villena
- Departamento de Inmunología, Oftalmología y ORL, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain.,Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
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8
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Cortelette NA, Souza NDO, Cataldi-Rodrigues L, Arthur C, Stowell SR, Dias-Baruffi M, Guimarães DAM, Ayres LR, Trés Pancoto JA. Functional evaluation of immunoregulatory molecules HLA-G, galectin-1, and IL-10 in people living with HIV. Medicine (Baltimore) 2022; 101:e28489. [PMID: 35029197 PMCID: PMC8758050 DOI: 10.1097/md.0000000000028489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 12/16/2021] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVES Investigate polymorphisms and expressions of human leukocyte antigen-G (HLA-G), galectin-1 (Gal-1), and interleukin-10 (IL-10) in people living with HIV (PLHIV) with and without comorbidities to help understanding the mechanisms involved in triggering these disorders in PLHIV and in their prognosis. DESIGN Here we evaluated the potential correlation between the genetic polymorphism and/or protein levels of HLA-G, Gal-1, and IL-10 with and without comorbidities of PLHIV. METHODS Two hundred HIV patients under antiretroviral treatment (83 with comorbidities and 117 without comorbidities) and 200 healthy individuals (controls) were genotyped, using PCR, for HLA-G 14-base pair polymorphism located at the 3' untranslated region in exon 8 insertion/insertion (Ins/Ins: low HLA-G expression) or deletion/deletion (Del/Del: high HLA-G expression). Soluble levels of HLA-G (sHLA-G), Gal-1, and IL-10 were quantified by enzyme-linked immunosorbet assay. RESULTS HIV patients without comorbidities exhibited higher frequency of 14-base pair Del/Del genotype than HIV patients with comorbidities. As expected, HIV patients Ins/Ins with and without comorbidities produced less sHLA-G than controls. However, HIV patients Del/Del with comorbidities expressed sHLA-G more than controls and HIV patients Del/Del without comorbidities. Interestingly, patients that showed low levels sHLA-G, and presence of comorbidities, exhibited high Gal-1 serum levels. However, an increase in soluble levels of IL-10 in PLHIV was observed when compared to controls, especially in the PLHIV group without comorbidities suggesting, a protective role of IL-10 in the development of comorbidities. CONCLUSIONS These data suggested that the high expression of sHLA-G and IL-10 or Gal-1 could be associated and could be associated with the development or not of comorbidities in PLHIV.
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Affiliation(s)
- Natalia Alves Cortelette
- Department of Pharmaceutical Sciences, Federal University of Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Nayana De Oliveira Souza
- Department of Pharmaceutical Sciences, Federal University of Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Lilian Cataldi-Rodrigues
- Department of Clinical, Toxicological and Bromatological Analysis, Faculty of Pharmaceutical Sciences of Ribeirão Preto - USP, Ribeirão Preto, São Paulo, Brazil
| | - Connie Arthur
- Center for Transfusion Medicine and Cellular Therapies, Department of Laboratory Medicine and Pathology, Emory University School of Medicine, Atlanta, GA
| | - Sean R. Stowell
- Center for Transfusion Medicine and Cellular Therapies, Department of Laboratory Medicine and Pathology, Emory University School of Medicine, Atlanta, GA
| | - Marcelo Dias-Baruffi
- Department of Clinical, Toxicological and Bromatological Analysis, Faculty of Pharmaceutical Sciences of Ribeirão Preto - USP, Ribeirão Preto, São Paulo, Brazil
| | | | - Lorena Rocha Ayres
- Department of Pharmaceutical Sciences, Federal University of Espírito Santo, Vitória, Espírito Santo, Brazil
| | - João Alexandre Trés Pancoto
- Department of Pharmaceutical Sciences, Federal University of Espírito Santo, Vitória, Espírito Santo, Brazil
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Sonon P, Tokplonou L, Sadissou I, M'po KKG, Glitho SSC, Agniwo P, Ibikounlé M, Souza AS, Massaro JD, Gonzalez D, Tchégninougbo T, Ayitchédji A, Massougbodji A, Moreau P, Garcia A, Milet J, Sabbagh A, Mendes-Junior CT, Moutairou KA, Castelli EC, Courtin D, Donadi EA. Human leukocyte antigen (HLA)-F and -G gene polymorphisms and haplotypes are associated with malaria susceptibility in the Beninese Toffin children. INFECTION GENETICS AND EVOLUTION 2021; 92:104828. [PMID: 33781967 DOI: 10.1016/j.meegid.2021.104828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 02/05/2021] [Accepted: 03/24/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND Little attention has been devoted to the role of the immunoregulatory HLA-E/-F/-G genes in malaria. We evaluated the entire HLA-E/-F/-G variability in Beninese children highly exposed to Plasmodium falciparum (P.f.) malaria. METHODS 154 unrelated children were followed-up for six months and evaluated for the presence and number of malaria episodes. HLA-E/-F/-G genes were genotyped using massively parallel sequencing. Anti P.f. antibodies were evaluated using ELISA. RESULTS Children carrying the G allele at HLA-F (-1499,rs183540921) showed increased P.f. asymptomatic/symptomatic ratio, suggesting that these children experienced more asymptomatic P.f. episodes than symptomatic one. Children carrying HLA-G-UTR-03 haplotype exhibited increased risk for symptomatic P.f. episodes and showed lower IgG2 response against P.f. GLURP-R2 when compared to the non-carriers. No associations were observed for the HLA-E gene. CONCLUSION HLA-F associations may be related to the differential expression profiles of the encoded immunomodulatory molecules, and the regulatory sites at the HLA-G 3'UTR may be associated to posttranscriptional regulation of HLA-G and to host humoral response against P.f.
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Affiliation(s)
- Paulin Sonon
- Post-graduate Program in Basic and Applied Immunology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Monte Alegre, 14049-900 Ribeirão Preto, SP, Brazil; Immunogenetic Laboratory, Immunology Department, Aggeu Magalhães Institute, Oswaldo Cruz Foundation, Av. Moraes rego, s/n, Campus da UFPE, Cidade Universitária, 50670420 Recife, PE, Brazil
| | - Léonidas Tokplonou
- Centre d'Etude et de Recherche sur le Paludisme Associé à la Grossesse et à l'Enfance (CERPAGE), Faculté des Sciences de la Santé, Cotonou, Bénin; Université de Paris, UMR 261 MERIT, IRD, F-75006 Paris, France; Département de Zoologie, Faculté des Sciences et Techniques, Université d'Abomey-Calavi, Cotonou, Bénin
| | - Ibrahim Sadissou
- Post-graduate Program in Basic and Applied Immunology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Monte Alegre, 14049-900 Ribeirão Preto, SP, Brazil; Intertryp, IRD, Cirad, University of Montpellier, Avenue Agropolis, 34398 Montpellier Cedex 5, France
| | - Kuumaaté K G M'po
- Centre d'Etude et de Recherche sur le Paludisme Associé à la Grossesse et à l'Enfance (CERPAGE), Faculté des Sciences de la Santé, Cotonou, Bénin; Département de Zoologie, Faculté des Sciences et Techniques, Université d'Abomey-Calavi, Cotonou, Bénin
| | - Sonya S C Glitho
- Centre d'Etude et de Recherche sur le Paludisme Associé à la Grossesse et à l'Enfance (CERPAGE), Faculté des Sciences de la Santé, Cotonou, Bénin; Département de Zoologie, Faculté des Sciences et Techniques, Université d'Abomey-Calavi, Cotonou, Bénin
| | - Privat Agniwo
- Centre d'Etude et de Recherche sur le Paludisme Associé à la Grossesse et à l'Enfance (CERPAGE), Faculté des Sciences de la Santé, Cotonou, Bénin; Département de Zoologie, Faculté des Sciences et Techniques, Université d'Abomey-Calavi, Cotonou, Bénin
| | - Moudachirou Ibikounlé
- Département de Zoologie, Faculté des Sciences et Techniques, Université d'Abomey-Calavi, Cotonou, Bénin
| | - Andréia S Souza
- São Paulo State University (UNESP), School of Medicine, Molecular Genetics and Bioinformatics Laboratory, Av. Prof. Dr. Walter Maurício Correa, s/n, 1861868, Botucatu, SP, Brazil
| | - Juliana Doblas Massaro
- Post-graduate Program in Basic and Applied Immunology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Monte Alegre, 14049-900 Ribeirão Preto, SP, Brazil
| | - Daniel Gonzalez
- Université de Paris, UMR 261 MERIT, IRD, F-75006 Paris, France
| | | | | | - Achille Massougbodji
- Centre d'Etude et de Recherche sur le Paludisme Associé à la Grossesse et à l'Enfance (CERPAGE), Faculté des Sciences de la Santé, Cotonou, Bénin
| | - Philippe Moreau
- CEA, DRF-Institut François Jacob, Service de Recherches en Hémato-Immunologie, Hopital Saint-Louis, 75010 Paris, France; Université de Paris, CEA, U976 HIPI Unit (Human Immunology, Physiopathology, Immunotherapy), Institut de Recherche Saint-Louis, 75010 Paris, France
| | - André Garcia
- Université de Paris, UMR 261 MERIT, IRD, F-75006 Paris, France
| | | | - Audrey Sabbagh
- Université de Paris, UMR 261 MERIT, IRD, F-75006 Paris, France
| | - Celso T Mendes-Junior
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, AV Bandeirantes, 3900, 14040901 Ribeirão Preto, SP, Brazil
| | - Kabirou A Moutairou
- Laboratoire de Biologie et Physiologie Cellulaire, Université d'Abomey-Calavi, Cotonou, Bénin
| | - Erick C Castelli
- São Paulo State University (UNESP), School of Medicine, Molecular Genetics and Bioinformatics Laboratory, Av. Prof. Dr. Walter Maurício Correa, s/n, 1861868, Botucatu, SP, Brazil; São Paulo State University (UNESP), Department of Pathology, School of Medicine, Botucatu, State of São Paulo, SP, Brazil
| | - David Courtin
- Université de Paris, UMR 261 MERIT, IRD, F-75006 Paris, France
| | - Eduardo A Donadi
- Post-graduate Program in Basic and Applied Immunology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Monte Alegre, 14049-900 Ribeirão Preto, SP, Brazil.
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10
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Association of HLA-G polymorphisms with systemic lupus erythematosus and correlation between soluble HLA‑G levels and the disease: a meta-analysis. Z Rheumatol 2021; 80:96-102. [PMID: 32274530 DOI: 10.1007/s00393-020-00783-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVE To investigate the association between HLA‑G polymorphisms and systemic lupus erythematosus (SLE) susceptibility as well as the relationship between circulating soluble HLA‑G (sHLA‑G) levels and SLE. METHODS A meta-analysis was performed to investigate the relationships between HLA‑G 14-bp insertion (I)/deletion (D), +3142 G/C, +3035 T/C, and +3003 C/T polymorphisms and SLE as well as the relationship between sHLA‑G serum/plasma levels in SLE patients and controls. RESULTS Eleven publications fulfilled our inclusion criteria. Meta-analysis under the dominant model showed an association in the overall group between the II+ID genotype of HLA‑G 14-bp I/D polymorphism and SLE (OR = 1.213, 95%CI = 1.077-1.365, P = 0.001). Ethnicity-specific meta-analysis showed an association between II+ID and SLE in Asians but not in South American and European populations. No correlation was observed using the allele contrast between HLA‑G +3142 G/C polymorphisms and SLE. Contrastingly, +3035 T/C and +3003 C/T meta-analysis showed a significant allelic association between SLE and HLA‑G polymorphisms (OR = 1.378, 95%CI = 1.109-1.713, P = 0.004; OR = 1.834, 95%CI = 1.112-3.022, P = 0.017; respectively). sHLA‑G levels were significantly higher in the SLE group than in the controls (SMD = 0.637, 95%CI = 0.382-0.892, P < 0.001). CONCLUSION We showed association of HLA‑G 14-bp I/D, +3035 T/C, and +3003 C/T polymorphisms with SLE susceptibility and significantly higher circulating sHLA‑G levels in SLE patients.
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Xu HH, Yan WH, Lin A. The Role of HLA-G in Human Papillomavirus Infections and Cervical Carcinogenesis. Front Immunol 2020; 11:1349. [PMID: 32670296 PMCID: PMC7330167 DOI: 10.3389/fimmu.2020.01349] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 05/27/2020] [Indexed: 12/24/2022] Open
Abstract
Human leukocyte antigen (HLA)-G, a non-classical HLA-class I molecule, has a low polymorphism frequency, restricted tissue distribution and immunoinhibitory property. HLA-G expression in tumor cells and cells chronically infected with virus may enable them to escape from host immune surveillance. It is well-known that the HLA-G molecule is a novel biomarker and potential therapeutic target that is relevant in various types of cancers, but its role in cervical cancer has not been fully explored. In this review, we aim to summarize and discuss the immunologic role of the HLA-G molecule in the context of HPV infections and the process of cervical cancer carcinogenesis. A better understanding of the potential impact of HLA-G on the clinical course of persistent HPV infections, cervical epithelial cell transformation, tumor growth, recurrence and metastasis is needed to identify a novel diagnostic/prognostic biomarker for cervical cancer, which is critical for cervical cancer risk screening. In addition, it is also necessary to identify HLA-G-driven immune mechanisms involved in the interactions between host and virus to explore novel immunotherapy strategies that target HLA-G/immunoglobulin-like transcript (ILT) immune checkpoints.
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Affiliation(s)
- Hui-Hui Xu
- Medical Research Center, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Linhai, China
| | - Wei-Hua Yan
- Medical Research Center, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Linhai, China
| | - Aifen Lin
- Biological Resource Center, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Linhai, China
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12
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Bertol BC, Dias FC, Debortoli G, Souto BM, Mendonça PB, Araújo RC, Santana RC, Ramalho LNZ, Castelli EC, Martinelli ADLC, Mendes-Junior CT, Carosella ED, Donadi EA, Moreau P. HLA-G liver expression and HLA-G extended haplotypes are associated with chronic hepatitis C in HIV-negative and HIV-coinfected patients. Clin Immunol 2020; 217:108482. [PMID: 32470543 DOI: 10.1016/j.clim.2020.108482] [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: 10/10/2019] [Revised: 03/05/2020] [Accepted: 05/25/2020] [Indexed: 02/07/2023]
Abstract
Chronic hepatitis C virus (HCV) infection induces liver damage and the HCV/Human Immunodeficiency Virus (HIV)-coinfection may further contribute to its progression. The HLA-G molecule inhibits innate and adaptive immunity and may be deleterious for chronically virus-infected cells. Thus we studied 204 HCV-mono-infected patients, 142 HCV/HIV-coinfected patients, 104 HIV-mono-infected patients and 163 healthy subjects. HLA-G liver expression was similarly induced in HCV and HCV/HIV specimens, increasing with advanced fibrosis and necroinflammatory activity, and with increased levels of liver function-related enzymes. Plasma soluble HLA-G (sHLA-G) levels were higher in HCV/HIV patients compared to HCV, HIV and to healthy individuals. sHLA-G continued to be higher in coinfected patients even after stratification of samples according to degree of liver fibrosis and necroinflammatory activity when compared to mono-infected patients. Some HLA-G gene haplotypes differentiated patient groups and presented few associations with liver and plasma HLA-G expression. HLA-G thus may help to distinguish patient groups.
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Affiliation(s)
- Bruna Cristina Bertol
- Postgraduate Program of Basic and Applied Immunology, Ribeirão Preto Medical School, University of São Paulo, 3900 Bandeirantes Avenue, 14049-900 Ribeirão Preto, Brazil
| | - Fabrício César Dias
- Department of Medicine, Division of Clinical Immunology, Ribeirão Preto Medical School, University of São Paulo, 3900 Bandeirantes Avenue, 14049-900 Ribeirão Preto, Brazil; Commissariat à l'Energie Atomique et aux Energies Alternatives, Direction de la Recherche Fondamentale, Institut de Biologie François Jacob, Service de Recherches en Hémato-Immunologie, Hôpital Saint-Louis, 1 Avenue Claude Vellefaux, 75475 Paris, France; Université Paris-Diderot, UMR 976 HIPI, Institut de Recherche Saint-Louis, 1 Avenue Claude Vellefaux, 75475 Paris, France
| | - Guilherme Debortoli
- Postgraduate Program of Genetics, Ribeirão Preto Medical School, University of São Paulo, 3900 Bandeirantes Avenue, 14049-900 Ribeirão Preto, Brazil
| | - Bruno Mendes Souto
- Department of Medicine, Division of Clinical Immunology, Ribeirão Preto Medical School, University of São Paulo, 3900 Bandeirantes Avenue, 14049-900 Ribeirão Preto, Brazil
| | - Priscila Baptista Mendonça
- Department of Medicine, Division of Clinical Immunology, Ribeirão Preto Medical School, University of São Paulo, 3900 Bandeirantes Avenue, 14049-900 Ribeirão Preto, Brazil
| | - Roberta Chaves Araújo
- Department of Medicine, Division of Gastroenterology, Ribeirão Preto Medical School, University of São Paulo, 3900 Bandeirantes Avenue, 14049-900 Ribeirão Preto, Brazil
| | - Rodrigo Carvalho Santana
- Department of Medicine, Division of Infectious and Tropical Diseases, Ribeirão Preto Medical School, University of São Paulo, 3900 Bandeirantes Avenue, 14049-900, Ribeirão Preto, Brazil
| | - Leandra Náira Zambelli Ramalho
- Department of Pathology, Ribeirão Preto Medical School, University of São Paulo, 3900 Bandeirantes Avenue, 14049-900 Ribeirão Preto, Brazil
| | - Erick Cruz Castelli
- São Paulo State University, Department of Pathology, School of Medicine, Av. Dr. Mario Rubens Guimarães Montenegro, 18618-687 Botucatu, Brazil
| | - Ana de Lourdes Candolo Martinelli
- Department of Medicine, Division of Gastroenterology, Ribeirão Preto Medical School, University of São Paulo, 3900 Bandeirantes Avenue, 14049-900 Ribeirão Preto, Brazil
| | - Celso Teixeira Mendes-Junior
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 3900 Bandeirantes Avenue, 14049-900 Ribeirão Preto, Brazil
| | - Edgardo Delfino Carosella
- Commissariat à l'Energie Atomique et aux Energies Alternatives, Direction de la Recherche Fondamentale, Institut de Biologie François Jacob, Service de Recherches en Hémato-Immunologie, Hôpital Saint-Louis, 1 Avenue Claude Vellefaux, 75475 Paris, France; Université Paris-Diderot, UMR 976 HIPI, Institut de Recherche Saint-Louis, 1 Avenue Claude Vellefaux, 75475 Paris, France
| | - Eduardo Antônio Donadi
- Postgraduate Program of Basic and Applied Immunology, Ribeirão Preto Medical School, University of São Paulo, 3900 Bandeirantes Avenue, 14049-900 Ribeirão Preto, Brazil; Department of Medicine, Division of Clinical Immunology, Ribeirão Preto Medical School, University of São Paulo, 3900 Bandeirantes Avenue, 14049-900 Ribeirão Preto, Brazil
| | - Philippe Moreau
- Commissariat à l'Energie Atomique et aux Energies Alternatives, Direction de la Recherche Fondamentale, Institut de Biologie François Jacob, Service de Recherches en Hémato-Immunologie, Hôpital Saint-Louis, 1 Avenue Claude Vellefaux, 75475 Paris, France; Université Paris-Diderot, UMR 976 HIPI, Institut de Recherche Saint-Louis, 1 Avenue Claude Vellefaux, 75475 Paris, France.
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13
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Bortolotti D, Vitali E, Stendardo M, Fucili A, Rizzo R, Boschetto P. Plasma soluble HLA-G levels in a cohort of heart failure patients exposed to chemicals. Hum Immunol 2019; 81:151-155. [PMID: 31806379 DOI: 10.1016/j.humimm.2019.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 11/21/2019] [Accepted: 11/23/2019] [Indexed: 12/28/2022]
Abstract
Heart failure (HF) is a syndrome caused by structural and/or functional cardiac abnormalities, resulting in a reduced cardiac output and/or elevated intracardiac pressures. Several studies reported a crucial role of immune activation and inflammation in the chronic heart failure (HF) pathogenesis, suggesting that pro-inflammatory and anti-inflammatory mediators could be predictive markers of the HF development and/or progression. Human Leukocyte Antigen-G (HLA-G), a tolerogenic and anti-inflammatory class I non-classical major histocompatibility complex molecule, was reported to be upregulated in patients diagnosed with HF, suggesting a tentative to regulate the inflammatory condition. We evaluated soluble (s)HLA-G plasmatic levels in patients with stable chronic heart failure at baseline visit and after 6 and 12 months. The 14 bp Insertion/Deletion polymorphisms of the HLA-G gene was also analyzed. We showed that in HF subjects, sHLA-G levels were higher in NYHA class II and III subjects (mild-severe symptoms) (6.11 ± 1.15 ng/ml; 8.25 ± 2.27 ng/ml, respectively) in comparison with NYHA class I subjects (no symptoms) (2.35 ± 0.43 ng/ml) (I vs II: p = 0.0156; I vs III: p = 0.0122). Moreover, the exposure to chemicals seems to affect sHLA-G levels, with higher sHLA-G levels in exposed patients (3.36 ± 5.12 ng/ml) in comparison with unexposed subjects (2.01 ± 2.84 ng/ml). The HLA-G 3'UTR 14 bp INS/DEL polymorphism correlated with sHLA-G, with the 14 bp INS/INS genotype associated with higher sHLA-G levels during the 12 months follow-up in unexposed subjects (p = 0.008). In conclusion, these results support a correlation between sHLA-G levels, genetics and HF disease in presence of work chemical exposition.
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Affiliation(s)
- Daria Bortolotti
- University of Ferrara, Department of Chemical and Pharmaceutical Sciences, Ferrara, Italy
| | - Emanuela Vitali
- University of Ferrara, Department of Medical Sciences, Ferrara, Italy
| | | | - Alessandro Fucili
- Cardiology Unit, University-Hospital of Ferrara, Cona, Ferrara and Maria Cecilia Hospital, GVM Care & Research, E.S: Health Science Foundation, Cotignola, Ravenna, Italy
| | - Roberta Rizzo
- University of Ferrara, Department of Chemical and Pharmaceutical Sciences, Ferrara, Italy.
| | - Piera Boschetto
- University of Ferrara, Department of Medical Sciences, Ferrara, Italy
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14
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Human leukocyte antigen-G 3' untranslated region polymorphism +3142G/C (rs1063320) and haplotypes are associated with manifestations of the American Tegumentary Leishmaniasis in a Northeastern Brazilian population. Hum Immunol 2019; 80:908-916. [PMID: 31420207 DOI: 10.1016/j.humimm.2019.08.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 07/25/2019] [Accepted: 08/05/2019] [Indexed: 11/21/2022]
Abstract
While the role of cytokine genes has been well documented in the context of Leishmania (Viannia) braziliensis infection, no studies have addressed the influence of human leukocyte antigen-G (HLA-G) in susceptibility/resistance to American Tegumentary Leishmaniasis (ATL). Here, we evaluated the influences of HLA-G, IL-10, TNF-A and IFN-G in the susceptibility and clinical manifestations of ATL. DNA of 114 ATL patients and 346 healthy individuals were sequenced for well-documented polymorphisms in HLA-G 3' untranslated region (UTR), in IL-10 and TNF-A promoters and in IFN-G intron 1. Soluble HLA-G (sHLA-G) and cytokine levels were evaluated by ELISA and flow cytometry, respectively. Analyses were performed using GraphPad and R-package software. Individuals bearing HLA-G +3142G/G showed an association with increased risk for ATL, whereas those carrying the HLA-G +3142C/G and one copy of UTR6 haplotype, showed an association with decreased risk for ATL. sHLA-G was overexpressed in "susceptible" patients compared to the "resistant'' one, and also in patients bearing +3142G/G genotype. From these results, HLA-G +3142G/G may be considered as genotype of susceptibility and UTR6 as marker of protection to ATL. Our findings showed a participation of HLA-G in the pathogenesis of the ATL.
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15
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Contini P, Negrini S, Murdaca G, Borro M, Puppo F. Evaluation of membrane-bound and soluble forms of human leucocyte antigen-G in systemic sclerosis. Clin Exp Immunol 2018; 193:152-159. [PMID: 29660112 PMCID: PMC6046504 DOI: 10.1111/cei.13134] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/15/2018] [Indexed: 12/26/2022] Open
Abstract
Systemic sclerosis (SSc) is a complex disease characterized by immune dysregulation, extensive vascular damage and widespread fibrosis. Human leucocyte antigen-G (HLA-G) is a non-classic class I major histocompatibility complex (MHC) molecule characterized by complex immunomodulating properties. HLA-G is expressed on the membrane of different cell lineages in both physiological and pathological conditions. HLA-G is also detectable in soluble form (sHLA-G) deriving from the shedding of surface isoforms (sHLA-G1) or the secretion of soluble isoforms (HLA-G5). Several immunosuppressive functions have been attributed to both membrane-bound and soluble HLA-G molecules. The plasma levels of sHLA-G were higher in SSc patients (444·27 ± 304·84 U/ml) compared to controls (16·74 ± 20·58 U/ml) (P < 0·0001). The plasma levels of transforming growth factor (TGF)-β were higher in SSc patients (18 937 ± 15 217 pg/ml) compared to controls (11 099 ± 6081 pg/ml; P = 0·003), and a significant correlation was found between TGF-β and the plasma levels of total sHLA-G (r = 0·65; P < 0·01), sHLA-G1 (r = 0·60; P = 0·003) and HLA-G5 (r = 0·47; P = 0·02). The percentage of HLA-G-positive monocytes (0·98 ± 1·72), CD4+ (0·37 ± 0·68), CD8+ (2·05 ± 3·74) and CD4+ CD8+ double-positive cells (14·53 ± 16·88) was higher in SSc patients than in controls (0·11 ± 0·08, 0·01 ± 0·01, 0·01 ± 0·01 and 0·39 ± 0·40, respectively) (P < 0·0001). These data indicate that in SSc the secretion and/or shedding of soluble HLA-G molecules and the membrane expression of HLA-G by peripheral blood mononuclear cells (PBMC) is clearly elevated, suggesting an involvement of HLA-G molecules in the immune dysregulation of SSc.
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Affiliation(s)
- P. Contini
- Department of Internal MedicineClinical Immunology Unit, University of Genoa and Ospedale Policlinico San MartinoGenoaItaly
| | - S. Negrini
- Department of Internal MedicineClinical Immunology Unit, University of Genoa and Ospedale Policlinico San MartinoGenoaItaly
| | - G. Murdaca
- Department of Internal MedicineClinical Immunology Unit, University of Genoa and Ospedale Policlinico San MartinoGenoaItaly
| | - M. Borro
- Department of Internal MedicineClinical Immunology Unit, University of Genoa and Ospedale Policlinico San MartinoGenoaItaly
| | - F. Puppo
- Department of Internal MedicineClinical Immunology Unit, University of Genoa and Ospedale Policlinico San MartinoGenoaItaly
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16
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Immunological aspects of rabies: a literature review. Arch Virol 2017; 162:3251-3268. [PMID: 28726129 DOI: 10.1007/s00705-017-3484-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 06/27/2017] [Indexed: 02/08/2023]
Abstract
Rabies is a lethal disease caused by the neurotropic virus rabies virus (RABV), and it remains an important public health problem globally. It is known that the host immune response is important for control of viral infection and promoting viral clearance. In this context, it is well documented that, in addition to RABV neutralizing antibody, interferons and cell-mediated immunity also have an important role in preventing the establishment of disease. On the other hand, RABV suppresses host immunity through different mechanisms, for example, direct inhibition of host gene expression, sequestration of pathogen-associated molecular patterns, or modification of cytokine signalling pathways, which hinder the protective host immune responses to RABV infection. Here, we review the immunological aspects of rabies, highlighting innate and adaptive immunity, as well as the host evasion immune mechanisms used by the virus. Finally, we briefly discuss how this knowledge can direct new research and be harnessed for future therapeutic strategies.
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17
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Allergen-driven HLA-G expression and secretion in peripheral blood mononuclear cells from allergic rhinitis patients. Hum Immunol 2016; 77:1172-1178. [PMID: 27527921 DOI: 10.1016/j.humimm.2016.08.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 07/21/2016] [Accepted: 08/10/2016] [Indexed: 01/26/2023]
Abstract
BACKGROUND It has been reported that soluble HLA-G serum levels are increased in patients with pollen-induced allergic rhinitis and decrease after immunotherapy. However, no functional study has been conducted so far. The aim of this study was to evaluate the membrane expression and secretion of HLA-G molecules in peripheral blood mononuclear cells from allergic rhinitis patients after in vitro incubation with the causal allergen. METHODS AND RESULTS Twenty-two allergic rhinitis patients and ten healthy subjects were enrolled. Membrane HLA-G expression was determined by flow cytometry and soluble HLA-G in culture supernatant was determined by immunoenzymatic assay. HLA-G expression was detected in CD4+ (T-helper-2) cells and monocytes after in vitro stimulation with the causal allergen but not with non specific stimuli and non causal allergens. Accordingly, the release of soluble HLA-G in culture supernatant occurred only after the stimulation with the causal allergen. Collectively, these results were confirmed by Western blot analysis. CONCLUSIONS The present study provides the first in vitro evidence that in allergic patients HLA-G expression and secretion is specifically induced by the causal allergen. These data may add new insights into the pathogenetic mechanisms underlying allergic inflammation and allergen specific immunotherapy.
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18
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Nardi FDS, König L, Wagner B, Giebel B, Santos Manvailer LF, Rebmann V. Soluble monomers, dimers and HLA-G-expressing extracellular vesicles: the three dimensions of structural complexity to use HLA-G as a clinical biomarker. HLA 2016; 88:77-86. [PMID: 27440734 DOI: 10.1111/tan.12844] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 06/29/2016] [Indexed: 12/11/2022]
Abstract
The HLA-G molecule belongs to the family of nonclassical human leukocyte antigen (HLA) class I. At variance to classical HLA class I, HLA-G displays (i) a low number of nucleotide variations within the coding region, (ii) a high structural diversity, (iii) a restricted peptide repertoire, (iv) a limited tissue distribution and (v) strong immune-suppressive properties. The physiological HLA-G surface expression is restricted to the maternal-fetal interface and to immune-privileged adult tissues. Soluble forms of HLA-G (sHLA-G) are detectable in various body fluids. Cellular activation and pathological processes are associated with an aberrant or a neo-expression of HLA-G/sHLA-G. Functionally, HLA-G and its secreted forms are considered to be key players in the induction of short- and long-term tolerance. Thus, its unique expression profile and tolerance-inducing functions render HLA-G/sHLA-G an attractive biomarker to monitor the systemic health/disease status and disease activity/progression for clinical approaches in disease management and treatments. Here, we place emphasis on (i) the current status of the tolerance-inducing functions by HLA-G/sHLA-G, (ii) the current complexity to implement this molecule as a meaningful clinical biomarker regarding the three dimensions of structural diversity (monomers, dimers and HLA-G-expressing extracellular vesicles) with its functional implications, and (iii) novel and future approaches to detect and quantify sHLA-G structures and functions.
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Affiliation(s)
- F da Silva Nardi
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany.,Laboratory of Immunogenetics and Histocompatibility (LIGH), Federal University of Paraná, Genetics Department, Curitiba, Brazil.,Ministry of Education of Brazil, Capes Foundation, Brasília, Brazil
| | - L König
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany.,Department of Gynecology and Obstetrics, University of Duisburg-Essen, Essen, Germany
| | - B Wagner
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany
| | - B Giebel
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany
| | - L F Santos Manvailer
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany.,Ministry of Education of Brazil, Capes Foundation, Brasília, Brazil
| | - V Rebmann
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany
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19
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Rebmann V, König L, Nardi FDS, Wagner B, Manvailer LFS, Horn PA. The Potential of HLA-G-Bearing Extracellular Vesicles as a Future Element in HLA-G Immune Biology. Front Immunol 2016; 7:173. [PMID: 27199995 PMCID: PMC4854879 DOI: 10.3389/fimmu.2016.00173] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 04/19/2016] [Indexed: 12/21/2022] Open
Abstract
The HLA-G molecule is a member of the non-classical HLA class I family. Its surface expression is physiologically restricted to the maternal–fetal interface and to immune privileged adult tissues. Despite the restricted tissue expression, HLA-G is detectable in body fluids as secreted soluble molecules. A unique feature of HLA-G is the structural diversity as surface expressed and as secreted molecules. Secreted HLA-G can be found in various body fluids either as free soluble HLA-G or as part of extracellular vesicles (EVs), which are composed of various antigens/ligands/receptors, bioactive lipids, cytokines, growth factors, and genetic information, such as mRNA and microRNA. Functionally, HLA-G and its secreted forms are considered to play a crucial role in the network of immune-regulatory tolerance mechanisms, preferentially interacting with the cognate inhibitory receptors LILRB1 and LILRB2. The HLA-G mediated tolerance is described in processes of pregnancy, inflammation, and cancer. However, almost all functional and clinical implications of HLA-G in vivo and in vitro have been established based on simple single ligand/receptor interactions at the cell surface, whereas HLA-G-bearing EVs were in minor research focus. Indeed, cytotrophoblast cells, mesenchymal stem cells, and cancer cells were recently described to secrete HLA-G-bearing EVs, displaying immunosuppressive effects and modulating the tumor microenvironment. However, numerous functional and clinical open questions persist. Here, we (i) introduce basic aspects of EVs biology, (ii) summarize the functional knowledge, clinical implications and open questions of HLA-G-bearing EVs, and (iii) discuss HLA-G-bearing EVs as a future element in HLA-G biology.
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Affiliation(s)
- Vera Rebmann
- Institute for Transfusion Medicine, University Hospital Essen , Essen , Germany
| | - Lisa König
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany; Department of Gynecology and Obstetrics, Essen, Germany
| | - Fabiola da Silva Nardi
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany; Laboratory of Immunogenetics and Histocompatibility (LIGH), Federal University of Paraná Genetics Department, Curitiba, Paraná, Brazil; CAPES Foundation, Ministry of Education of Brazil, Brasília, Federal District, Brazil
| | - Bettina Wagner
- Institute for Transfusion Medicine, University Hospital Essen , Essen , Germany
| | - Luis Felipe Santos Manvailer
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany; CAPES Foundation, Ministry of Education of Brazil, Brasília, Federal District, Brazil
| | - Peter A Horn
- Institute for Transfusion Medicine, University Hospital Essen , Essen , Germany
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20
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Prominent HLA-G Expression in Liver Disease But Not After Liver Transplantation. Transplantation 2015; 99:2514-22. [DOI: 10.1097/tp.0000000000000761] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Serum-soluble HLA-G is associated with specific IgE in patients with allergic rhinitis and asthma. Inflammation 2015; 37:1630-4. [PMID: 24736882 DOI: 10.1007/s10753-014-9890-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Allergic rhinitis (AR) and allergic asthma (AA) are characterized by T helper (Th)2-polarized immune response. Soluble human leukocyte antigen G (sHLA-G) molecule plays an immunomodulatory activity. Previously, it has been reported that children with AR or AA had higher sHLA-G levels in comparison with normal subjects. Thus, the present study aimed at confirming these data in adults and investigating whether there was a relationship between serum sHLA-G levels and serum IgE levels, in patients with AR or AA. One hundred twenty symptomatic patients, suffering from respiratory symptoms, were enrolled: 45 non-allergic and 75 allergic. A group of 44 healthy subjects was considered as control. Serum sHLA-G levels and serum allergen-specific IgE were determined by immunoenzymatic methods. Allergic patients had significantly higher levels of sHLA-G molecules than non-allergic patients and normal controls (p<0.0001). There was no difference between AR and AA. sHLA-G moderately related with allergen-specific IgE both in AR (r=0.468) and AA patients (r=0.479). The present study confirms that serum sHLA-G molecules are significantly increased in allergic disease and demonstrates that sHLA-G levels are related with allergen-specific IgE levels.
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sHLA-G involved in the apoptosis of decidual natural killer cells following Toxoplasma gondii infection. Inflammation 2015; 37:1718-27. [PMID: 24854161 DOI: 10.1007/s10753-014-9900-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This study aims to assess whether soluble HLA-G (sHLA-G) is involved in apoptosis of decidual natural killer (dNK) cells following Toxoplasma gondii infection. dNK cells or NK-92 cells were infected with T. gondii and co-cultured with trophoblast cells or BeWo cells. Infected co-cultured cells were treated without or with sHLA-G neutralizing antibody. Uninfected co-cultured cells were used as controls. Apoptosis of dNK cells were analyzed by flow cytometry and confocal microscope. Real-time PCR and Western blot were used to determine caspase 3 and caspase 8 expression. sHLA-G in supernatant were measured by enzyme-linked immunosorbent assay (ELISA). In infection groups, sHLA-G was increased, while dNK apoptosis proteins caspase 3 and caspase 8 were up-regulated, but significantly decreased in the presence of sHLA-G neutralizing antibody compared to controls. Under the situation of T. gondii-infected dNK cells co-cultured with trophoblast cells, the up-regulation of sHLA-G could induce dNK cells apoptosis which ultimately may contribute to the abnormal pregnancy outcomes with T. gondii infection.
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Degani Veit T, Bogo Chies JA, Switala M, Wagner B, Horn PA, Busatto M, Viegas Brenol C, Tavares Brenol JC, Machado Xavier R, Rebmann V. The paradox of high availability and low recognition of soluble HLA-G by LILRB1 receptor in rheumatoid arthritis patients. PLoS One 2015; 10:e0123838. [PMID: 25853899 PMCID: PMC4390237 DOI: 10.1371/journal.pone.0123838] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 02/24/2015] [Indexed: 11/23/2022] Open
Abstract
HLA-G is a regulatory molecule involved in immunologic tolerance. Growing evidence indicates that HLA-G plays a role in the regulation of inflammatory processes and autoimmune diseases. This study aimed at a systematic evaluation of soluble HLA-G (sHLA-G) in plasma of rheumatoid arthritis (RA) patients with long-lasting chronic inflammation. RA patients (n=68) and healthy controls (n=26) had their plasmatic sHLA-G measured by ELISA whereas the binding capability of sHLA-G to its cognate LILRB1 receptor was measured by a Luminex-based assay. All subjects were PCR-genotyped for HLA-G 14bp polymorphism (rs66554220). Significantly higher sHLA-G levels were observed in patients (p<0.001), however no significant differences were observed in LILRB1 binding capacity between RA patients and controls. Remarkably, the proportion of patients presenting specific binding of sHLA-G to LILRB1 was significantly decreased as compared to controls (56% vs. 81%, p=0.027). Patients without rheumatoid factor (RF-) were significantly overrepresented in the group of patients positive for LILRB1 binding as compared to patients without LILRB1 binding (31% vs 10%, p=0.033). Furthermore, methotrexate treated patients (n=58) revealed significantly lower LILRB1 binding to sHLA-G molecules than non-treated patients (medians: 12.2 vs. 67.7 units/ml, p=0.031). Unlike in controls, no significant differences in sHLA-G levels were observed among patients grouped by 14pb genotype. Thus, in a substantial number of late RA patients, the circulating sHLA-G molecules are impaired regarding LILRB1 recognition, meaning that although increased levels are observed; these molecules are not qualified to exert their protective functions against inflammation. Our findings offer new insights into the immunopathology of RA patients with long-lasting anti-RA-treatment and highlight the importance to also measure the binding capability of sHLA-G to LILRB1.
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Affiliation(s)
- Tiago Degani Veit
- Laboratório de Imunogenética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - José Artur Bogo Chies
- Laboratório de Imunogenética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Magdalena Switala
- Institute for Transfusion Medicine, University Hospital of Essen, Essen, Germany
| | - Bettina Wagner
- Institute for Transfusion Medicine, University Hospital of Essen, Essen, Germany
| | - Peter A. Horn
- Institute for Transfusion Medicine, University Hospital of Essen, Essen, Germany
| | - Mauricio Busatto
- Laboratório de Imunogenética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | | | | | - Vera Rebmann
- Institute for Transfusion Medicine, University Hospital of Essen, Essen, Germany
- * E-mail:
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Barrientos G, Toro A, Moschansky P, Cohen M, Garcia MG, Rose M, Maskin B, Sánchez-Margalet V, Blois SM, Varone CL. Leptin promotes HLA-G expression on placental trophoblasts via the MEK/Erk and PI3K signaling pathways. Placenta 2015; 36:419-26. [PMID: 25649687 DOI: 10.1016/j.placenta.2015.01.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Revised: 12/19/2014] [Accepted: 01/13/2015] [Indexed: 11/17/2022]
Abstract
INTRODUCTION The development of the human haemochorial placenta requires complex regulatory mechanisms to protect invasive trophoblast cells from cytotoxic responses elicited by maternal immune cells. Leptin, the adipocyte derived hormone encoded by the Lep gene, is synthesized by placental trophoblasts and exerts pleiotropic effects on the immune system, including the promotion of inflammation and the activation of T cell responses. METHODS To address its possible involvement in the modulation of maternal immune responses during pregnancy, we investigated the effect of leptin on the expression of the class Ib histocompatibility antigen HLA-G as one of the chief immunosuppressive strategies used by trophoblast cells. RESULTS In vitro incubation of the trophoblast derived Swan 71 and JEG-3 cell lines with 25-50 ng/ml recombinant leptin significantly boosted HLA-G mRNA and protein expression, and this effect was abrogated upon pharmacological inhibition of the PI3K-Akt and MEK-Erk signaling pathways. A similar stimulatory effect of leptin was observed in term placental tissue explants, though 10-fold higher doses were required for stimulation. Further, JEG-3 cells treated with a leptin antisense oligodeoxynucleotide displayed decreased HLA-G expression levels, which were partially recovered by addition of stimulating doses of exogenous hormone. Immunofluorescence and qPCR analysis confirmed leptin biosynthesis in placental tissue, further showing that invasive extravillous trophoblast cells were a main source of this hormone during the first trimester of normal pregnancies. DISCUSSION Taken together, our results show that leptin acts as an autocrine/paracrine signal promoting HLA-G expression in placental trophoblasts suggesting an important role in the regulation of immune evasion mechanisms at the fetal maternal interface.
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Affiliation(s)
- G Barrientos
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, IQUIBICEN CONICET, Buenos Aires, Argentina
| | - A Toro
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, IQUIBICEN CONICET, Buenos Aires, Argentina
| | - P Moschansky
- Charité Center 12 Internal Medicine and Dermatology, Reproductive Medicine Research Group, Medicine University Berlin, Germany
| | - M Cohen
- Laboratoire d'Hormonologie, Department of Gynaecology and Obstetrics, Geneva, Switzerland
| | - M G Garcia
- Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Derqui-Buenos Aires, Argentina
| | - M Rose
- Charité Center 12 Internal Medicine and Dermatology, Reproductive Medicine Research Group, Medicine University Berlin, Germany
| | - B Maskin
- Hospital Nacional Profesor Alejandro Posadas, Buenos Aires, Argentina
| | - V Sánchez-Margalet
- Departamento de Bioquímica Médica y Biología Molecular, Hospital Universitario Virgen Macarena, Facultad de Medicina, Universidad de Sevilla, Sevilla, Spain
| | - S M Blois
- Charité Center 12 Internal Medicine and Dermatology, Reproductive Medicine Research Group, Medicine University Berlin, Germany.
| | - C L Varone
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, IQUIBICEN CONICET, Buenos Aires, Argentina.
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25
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HLA-G and susceptibility to develop celiac disease. Hum Immunol 2015; 76:36-41. [DOI: 10.1016/j.humimm.2014.12.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 05/19/2014] [Accepted: 12/03/2014] [Indexed: 11/20/2022]
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Agrawal D, Prakash S, Misra MK, Phadke SR, Agrawal S. Implication of HLA-G 5′ upstream regulatory region polymorphisms in idiopathic recurrent spontaneous abortions. Reprod Biomed Online 2015; 30:82-91. [DOI: 10.1016/j.rbmo.2014.09.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 09/19/2014] [Accepted: 09/23/2014] [Indexed: 12/27/2022]
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28
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Zhang X, Li S, Zhang Y, Lu Y, Wang J, Xu J, Li X, Qin X. Meta-analysis of the relationship between 14bp insertion/deletion polymorphism of HLA-G gene and susceptibility to systemic lupus erythematosus. Hum Immunol 2014; 75:1171-6. [DOI: 10.1016/j.humimm.2014.10.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 10/09/2014] [Accepted: 10/09/2014] [Indexed: 10/24/2022]
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29
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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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30
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Meta-analysis of associations between functional HLA-G polymorphisms and susceptibility to systemic lupus erythematosus and rheumatoid arthritis. Rheumatol Int 2014; 35:953-61. [DOI: 10.1007/s00296-014-3155-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 10/08/2014] [Indexed: 01/29/2023]
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31
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Castelli EC, Ramalho J, Porto IOP, Lima THA, Felício LP, Sabbagh A, Donadi EA, Mendes-Junior CT. Insights into HLA-G Genetics Provided by Worldwide Haplotype Diversity. Front Immunol 2014; 5:476. [PMID: 25339953 PMCID: PMC4186343 DOI: 10.3389/fimmu.2014.00476] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Accepted: 09/18/2014] [Indexed: 12/12/2022] Open
Abstract
Human leukocyte antigen G (HLA-G) belongs to the family of non-classical HLA class I genes, located within the major histocompatibility complex (MHC). HLA-G has been the target of most recent research regarding the function of class I non-classical genes. The main features that distinguish HLA-G from classical class I genes are (a) limited protein variability, (b) alternative splicing generating several membrane bound and soluble isoforms, (c) short cytoplasmic tail, (d) modulation of immune response (immune tolerance), and (e) restricted expression to certain tissues. In the present work, we describe the HLA-G gene structure and address the HLA-G variability and haplotype diversity among several populations around the world, considering each of its major segments [promoter, coding, and 3′ untranslated region (UTR)]. For this purpose, we developed a pipeline to reevaluate the 1000Genomes data and recover miscalled or missing genotypes and haplotypes. It became clear that the overall structure of the HLA-G molecule has been maintained during the evolutionary process and that most of the variation sites found in the HLA-G coding region are either coding synonymous or intronic mutations. In addition, only a few frequent and divergent extended haplotypes are found when the promoter, coding, and 3′UTRs are evaluated together. The divergence is particularly evident for the regulatory regions. The population comparisons confirmed that most of the HLA-G variability has originated before human dispersion from Africa and that the allele and haplotype frequencies have probably been shaped by strong selective pressures.
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Affiliation(s)
- Erick C Castelli
- Department of Pathology, School of Medicine of Botucatu, Universidade Estadual Paulista , Botucatu , Brazil
| | - Jaqueline Ramalho
- Department of Pathology, School of Medicine of Botucatu, Universidade Estadual Paulista , Botucatu , Brazil
| | - Iane O P Porto
- Department of Pathology, School of Medicine of Botucatu, Universidade Estadual Paulista , Botucatu , Brazil
| | - Thálitta H A Lima
- Department of Pathology, School of Medicine of Botucatu, Universidade Estadual Paulista , Botucatu , Brazil
| | - Leandro P Felício
- Biological Sciences Institute, Federal University of Goias , Goiânia , Brazil
| | - Audrey Sabbagh
- UMR 216, Institut de Recherche pour le Développement, MERIT , Paris , France ; Faculté de Pharmacie, Université Paris Descartes, Sorbonne Paris Cité , Paris , France
| | - Eduardo A Donadi
- Division of Clinical Immunology, Department of Medicine, School of Medicine of Ribeirão Preto, University of São Paulo , Ribeirão Preto , Brazil
| | - Celso T Mendes-Junior
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, University of São Paulo , Ribeirão Preto , Brazil
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32
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HLA-G gene expression influenced at allelic level in association with end stage renal disease and acute allograft rejection. Hum Immunol 2014; 75:833-9. [DOI: 10.1016/j.humimm.2014.06.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 06/03/2014] [Accepted: 06/03/2014] [Indexed: 01/01/2023]
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Stem cell transplantation for muscular dystrophy: the challenge of immune response. BIOMED RESEARCH INTERNATIONAL 2014; 2014:964010. [PMID: 25054157 PMCID: PMC4098613 DOI: 10.1155/2014/964010] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 06/05/2014] [Indexed: 01/03/2023]
Abstract
Treating muscle disorders poses several challenges to the rapidly evolving field of regenerative medicine. Considerable progress has been made in isolating, characterizing, and expanding myogenic stem cells and, although we are now envisaging strategies to generate very large numbers of transplantable cells (e.g., by differentiating induced pluripotent stem cells), limitations directly linked to the interaction between transplanted cells and the host will continue to hamper a successful outcome. Among these limitations, host inflammatory and immune responses challenge the critical phases after cell delivery, including engraftment, migration, and differentiation. Therefore, it is key to study the mechanisms and dynamics that impair the efficacy of cell transplants in order to develop strategies that can ultimately improve the outcome of allogeneic and autologous stem cell therapies, in particular for severe disease such as muscular dystrophies. In this review we provide an overview of the main players and issues involved in this process and discuss potential approaches that might be beneficial for future regenerative therapies of skeletal muscle.
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Borghi A, Rizzo R, Corazza M, Bertoldi AM, Bortolotti D, Sturabotti G, Virgili A, Di Luca D. HLA-G 14-bp polymorphism: a possible marker of systemic treatment response in psoriasis vulgaris? Preliminary results of a retrospective study. Dermatol Ther 2014; 27:284-9. [DOI: 10.1111/dth.12140] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Alessandro Borghi
- Department of Medical Sciences; Section of Dermatology; University of Ferrara; Ferrara Italy
| | - Roberta Rizzo
- Department of Medical Sciences; Section of Microbiology; University of Ferrara; Ferrara Italy
| | - Monica Corazza
- Department of Medical Sciences; Section of Dermatology; University of Ferrara; Ferrara Italy
| | - Alberto Maria Bertoldi
- Department of Medical Sciences; Section of Dermatology; University of Ferrara; Ferrara Italy
| | - Daria Bortolotti
- Department of Medical Sciences; Section of Microbiology; University of Ferrara; Ferrara Italy
| | - Giulia Sturabotti
- Department of Medical Sciences; Section of Dermatology; University of Ferrara; Ferrara Italy
| | - Annarosa Virgili
- Department of Medical Sciences; Section of Dermatology; University of Ferrara; Ferrara Italy
| | - Dario Di Luca
- Department of Medical Sciences; Section of Microbiology; University of Ferrara; Ferrara Italy
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35
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HLA-G dimers in the prolongation of kidney allograft survival. J Immunol Res 2014; 2014:153981. [PMID: 24741575 PMCID: PMC3985180 DOI: 10.1155/2014/153981] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Revised: 02/23/2014] [Accepted: 02/27/2014] [Indexed: 01/01/2023] Open
Abstract
Human leukocyte antigen-G (HLA-G) contributes to acceptance of allografts in solid organ/tissue transplantation. Most studies have determined that soluble HLA-G isoforms are systematically detected in serum/plasma of transplanted patients with significantly fewer episodes of acute and/or chronic rejection of allogeneic tissue/organ. Current models of the interactions of HLA-G and its specific receptors explain it as functioning in a monomeric form. However, in recent years, new data has revealed the ability of HLA-G to form disulfide-linked dimeric complexes with high preferential binding and functional activities. Limited data are available on the role of soluble HLA-G dimers in clinical pathological conditions. We describe here the presence of soluble HLA-G dimers in kidney transplant patients. Our study showed that a high level of HLA-G dimers in plasma and increased expression of the membrane-bound form of HLA-G on monocytes are associated with prolongation of kidney allograft survival. We also determined that the presence of soluble HLA-G dimers links to the lower levels of proinflammatory cytokines, suggesting a potential role of HLA-G dimers in controlling the accompanying inflammatory state.
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36
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Ciprandi G, DeAmici M. Soluble HLA-G serum levels depend on allergy type and IgE levels. ALLERGY & RHINOLOGY 2014; 5:9-11. [PMID: 24612937 PMCID: PMC4019747 DOI: 10.2500/ar.2014.5.0076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Allergic rhinitis (AR) is characterized by Th2 polarized immune response. Soluble HLA (sHLA) molecules play an immunomodulatory activity. Two different studies evidenced that both patients with seasonal AR (SAR) and patients with perennial AR (PAR) had higher sHLA-G levels than normal controls. The aim of this study was to compare sHLA-G serum levels in SAR and PAR patients, also considering allergen-specific IgE. One hundred sixty-eight AR patients were enrolled, 94 with SAR and 74 with PAR. A group of 116 healthy subjects was considered as control. sHLA-G and allergen-specific IgE serum levels were determined by immunoenzymatic method. SAR patients had significantly higher levels of sHLA-G than PAR patients (p = 0.0194). sHLA-G was moderately related to allergen-specific IgE both in SAR (r = 0.497) and in PAR patients (r = 0.584). The present study provides evidence that sHLA-G serum levels depend on the type of allergy and are related to allergen-specific IgE serum levels. These findings may suggest that sHLA-G could be a biomarker of allergic reaction.
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Affiliation(s)
- Giorgio Ciprandi
- IRCCS-Azienda Ospedaliera Universitaria San Martino, Genoa, Italy
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37
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The 14 bp Del/Ins HLA-G polymorphism is related with high blood pressure in acute coronary syndrome and type 2 diabetes mellitus. BIOMED RESEARCH INTERNATIONAL 2014; 2014:898159. [PMID: 24689061 PMCID: PMC3933038 DOI: 10.1155/2014/898159] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 12/19/2013] [Accepted: 12/23/2013] [Indexed: 12/31/2022]
Abstract
Immunologic and inflammatory processes are involved in the pathogenesis of acute coronary syndrome (ACS) and type 2 diabetes mellitus (DM2). Human leukocyte antigen-G (HLA-G) is a negative regulator of the immune response. This study evaluates the 14 bp Del/Ins HLA-G polymorphism in ACS and DM2. Three hundred and seventy individuals from Western Mexico were recruited and categorized into three groups: ACS (86), DM2 without coronary complications (70), and healthy subjects (214). Genotyping of the 14 bp Del/Ins HLA-G polymorphism was performed by PCR and Native-PAGE. The most common risk factors were hypertension and overweight in ACS and DM2, respectively. The genetic distribution of the 14 bp Del/Ins HLA-G polymorphism showed no significant differences between groups (P ≥ 0.23). Nonetheless, the Ins/Ins genotype was associated with high blood pressure (HBP) in the DM2 group (ORc = 1.65, P = 0.02). The genetic recessive model showed similar findings (ORc = 3.03, P = 0.04). No association was found in ACS, with a P of 0.05; nevertheless, the prevalence of Ins/Ins carriers was quite similar to that found in the DM2-HBP group. The 14 bp Del/Ins HLA-G polymorphism was not a susceptibility factor for ACS or DM2; however, the Ins/Ins genotype might have contributed to the development of HBP in the studied groups.
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Naji A, Menier C, Morandi F, Agaugué S, Maki G, Ferretti E, Bruel S, Pistoia V, Carosella ED, Rouas-Freiss N. Binding of HLA-G to ITIM-Bearing Ig-like Transcript 2 Receptor Suppresses B Cell Responses. THE JOURNAL OF IMMUNOLOGY 2014; 192:1536-46. [DOI: 10.4049/jimmunol.1300438] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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39
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Somatostatin Expression in Human Hair Follicles and Its Potential Role in Immune Privilege. J Invest Dermatol 2013; 133:1722-30. [DOI: 10.1038/jid.2013.53] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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40
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Preterm human amnion epithelial cells have limited reparative potential. Placenta 2013; 34:486-92. [DOI: 10.1016/j.placenta.2013.03.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 03/07/2013] [Accepted: 03/26/2013] [Indexed: 11/21/2022]
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41
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Shechter R, London A, Schwartz M. Orchestrated leukocyte recruitment to immune-privileged sites: absolute barriers versus educational gates. Nat Rev Immunol 2013; 13:206-18. [PMID: 23435332 DOI: 10.1038/nri3391] [Citation(s) in RCA: 269] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Complex barriers separate immune-privileged tissues from the circulation. Here, we propose that cell entry to immune-privileged sites through barriers composed of tight junction-interconnected endothelium is associated with destructive inflammation, whereas border structures comprised of fenestrated vasculature enveloped by tightly regulated epithelium serve as active and selective immune-skewing gates in the steady state. Based on emerging knowledge of the central nervous system and information from other immune-privileged sites, we propose that these sites are endowed either with absolute endothelial-based barriers and epithelial gates that enable selective and educative transfer of trafficking leukocytes or with selective epithelial gates only.
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Affiliation(s)
- Ravid Shechter
- Department of Neurobiology, Weizmann Institute of Science, Rehovot, Israel
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42
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Kuśnierczyk P. Killer cell immunoglobulin-like receptor gene associations with autoimmune and allergic diseases, recurrent spontaneous abortion, and neoplasms. Front Immunol 2013; 4:8. [PMID: 23372569 PMCID: PMC3557723 DOI: 10.3389/fimmu.2013.00008] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Accepted: 01/05/2013] [Indexed: 11/13/2022] Open
Abstract
Killer cell immunoglobulin-like receptors (KIRs) are a family of cell surface inhibitory or activating receptors expressed on natural killer cells and some subpopulations of T lymphocytes. KIR genes are clustered in the 19q13.4 region and are characterized by both allelic (high numbers of variants) and haplotypic (different numbers of genes for inhibitory and activating receptors on individual chromosomes) polymorphism. This contributes to diverse susceptibility to diseases and other clinical situations. Associations of KIR genes, as well as of genes for their ligands, with selected diseases such as psoriasis vulgaris and atopic dermatitis, rheumatoid arthritis, recurrent spontaneous abortion, and non-small cell lung cancer are discussed in the context of NK and T cell functions.
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Affiliation(s)
- Piotr Kuśnierczyk
- Laboratory of Immunogenetics and Tissue Immunology, Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences Wrocław, Poland
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43
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Heparin increases HLA-G levels in primary antiphospholipid syndrome. Clin Dev Immunol 2012; 2012:232390. [PMID: 22654952 PMCID: PMC3359668 DOI: 10.1155/2012/232390] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 03/03/2012] [Accepted: 03/05/2012] [Indexed: 01/20/2023]
Abstract
Objectives. The aim of this study was to investigate the HLA-G serum levels in Primary Antiphospholipid Syndrome (PAPS) patients, its impact on clinical and laboratory findings, and heparin treatment. Methods. Forty-four PAPS patients were age and gender matched with 43 controls. HLA-G serum levels were measured using an enzyme-linked immunosorbent assay (ELISA). Results. An increase in soluble HLA-G levels was found in patients compared to controls (3.35 (0–22.9) versus 1.1 (0–14), P = 0.017). There were no significant differences in HLA-G levels between patients with and without obstetric events, arterial thrombosis, venous thrombosis, or stroke. Sixty-six percent of patients were being treated with heparin. Interestingly, patients treated with heparin had higher HLA-G levels than ones who were not treated with this medication (5 (0–22.9) versus 1.8 (0–16) ng/mL, P = 0.038). Furthermore, patients on heparin who experienced obstetric events had a trend to increased HLA-G levels compared to patients who were not on heparin and did not have obstetric events (5.8 (0–22.9) versus 2 (0–15.2) ng/mL, P = 0.05). Conclusion. This is the first study to demonstrate that serum HLA-G levels are increased in APS patients. We also demonstrated that heparin increases HLA-G levels and may increase tolerance towards autoantigens.
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Laskowska M, Laskowska K, Oleszczuk J. Maternal soluble human leukocyte antigen-G levels in pregnancies complicated by foetal intrauterine growth restriction with and without preeclampsia. Pregnancy Hypertens 2012; 2:168-73. [PMID: 26105102 DOI: 10.1016/j.preghy.2012.01.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 12/18/2011] [Accepted: 01/30/2012] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the maternal serum of soluble human leukocyte antigen-G (sHLA-G) levels in pregnant women with an isolated intrauterine growth restricted foetus (IUGR) and in preeclamptic pregnancies with and without IUGR. PATIENTS AND METHODS The study was conducted on 31 normotensive patients with pregnancy complicated by IUGR, 17 preeclamptic patients with appropriate-for-gestational-age foetal intrauterine growth, 21 with preeclampsia complicated by IUGR, and 32 healthy pregnant controls. Maternal serum sHLA-G levels were calculated using the enzyme-linked immunosorbent assay. RESULTS Maternal serum sHLA-G levels tended to be higher in both groups of preeclamptic patients, and were highest in patients with IUGR in the course of severe preeclampsia. Lower serum levels of sHLA-G were observed in the group of normotensive pregnant women with an intrauterine growth restricted foetus, but these differences were not statistically significant. The mean values were 22.759±14.151units/mL in the IUGR group, 25.948±18.888units/mL in preeclamptic patients with normal intrauterine foetal growth, 31.646±27.576units/mL in preeclamptic pregnant women with IUGR, and 24.178±24.828units/mL in the healthy controls. CONCLUSIONS Our findings suggest that the increased levels of sHLA-G in the maternal serum may play a significant role in the pathogenesis of preeclampsia, especially in preeclampsia complicated by intrauterine foetal growth restriction. These associations may offer a better insight into the etiology and pathogenesis of preeclampsia with and without IUGR. It seems that sHLA-G does not play a clinically significant role in the pathogenesis of isolated intrauterine foetal growth restriction in normotensive pregnancies.
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Affiliation(s)
- Marzena Laskowska
- Department of Obstetrics and Perinatology, Medical University of Lublin, 20-950 Lublin, ul. Jaczewskiego 8, Poland.
| | | | - Jan Oleszczuk
- Department of Obstetrics and Perinatology, Medical University of Lublin, 20-950 Lublin, ul. Jaczewskiego 8, Poland
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White SR. Human leucocyte antigen-G: expression and function in airway allergic disease. Clin Exp Allergy 2011; 42:208-17. [PMID: 22092595 DOI: 10.1111/j.1365-2222.2011.03881.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Human leucocyte antigen-G (HLA-G) is a non-classical HLA class I molecule demonstrated originally in placental trophoblast cells. Recognition of the importance of HLA-G to the maternal immune accommodation of the semi-allogeneic fetus has led to investigations of its role in the suppression of immune responses and induction of tolerance. More recently, HLA-G has been shown to have increased expression in several immunological diseases including asthma and allergic rhinitis. The focus of this review is the potential role of HLA-G in immunological airway diseases.
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Affiliation(s)
- S R White
- Department of Medicine, The University of Chicago, Chicago, IL 60637, USA.
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Moodley S, Bobat R. Expression of HLA-G1 at the placental interface of HIV-1 infected pregnant women and vertical transmission of HIV. Placenta 2011; 32:778-82. [PMID: 21816469 DOI: 10.1016/j.placenta.2011.07.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 07/11/2011] [Accepted: 07/12/2011] [Indexed: 12/26/2022]
Abstract
OBJECTIVES The ability of Human Leucocyte Antigen-G (HLA-G) to inhibit the cytolytic effect to immunocompetent cell types, suggests that HLA-G has an immunomodulatory role. In view of this concept the objective of the study was to assess whether the Major Histocompatibility Complex -coded molecule HLA-G mRNA is a risk factor at the placental barrier in HIV-1 positive pregnant women. DESIGN Placental HLA-G1 levels in HIV-1 infected mothers and viral loads in both mothers and their babies were performed on fifty-five participants. METHODS Synthesis of complementary deoxyribose nucleic acid (cDNA) was performed using ribose nucleic acid (RNA) extracted from placental tissue samples. Amplification of cDNA using specifically designed primers complementary to the full length HLA-G1 isoform was quantified using real time-polymerase chain reaction (RT-PCR). Viral load assays (Amplicor Version 1.5, Roche Diagnostics) were performed on all plasma samples. RESULTS HLA-G1 primers detected the full length isoform HLA-G1 PCR product at 86.5 °C. Logistic regression calculations indicated that the risk of babies becoming infected increased by 1.3 with every 1 unit increase in HLA-G1 expression. Female babies were 3.7 times more likely to become infected than male. There was a positive correlation between mothers' log viral load and transmission of infection to the baby (p = 0.047; 95%CI 1.029-11.499). CONCLUSION Maternal viral load was a strong predictor of viral transmission. Placental HLA-G1 expression was up-regulated 3.95 times more in placentas of HIV-1 infected mothers with infected babies when compared to uninfected babies.
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Affiliation(s)
- S Moodley
- Dept of Biomedical Sciences, Mangosuthu University of Technology, Umlazi, KwaZulu-Natal 4001, South Africa.
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Du L, Xiao X, Wang C, Zhang X, Zheng N, Wang L, Zhang X, Li W, Wang S, Dong Z. Human leukocyte antigen-G is closely associated with tumor immune escape in gastric cancer by increasing local regulatory T cells. Cancer Sci 2011; 102:1272-80. [PMID: 21466615 DOI: 10.1111/j.1349-7006.2011.01951.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Human leukocyte antigen-G (HLA-G) plays an important role in tumor cell escape. We investigated HLA-G expression and regulatory T cells (Tregs) infiltrates in patients with gastric cancer (GC), analyzed their relationship with clinicopathologic features, and characterized their role in tumor immune escape. We also investigated the plasma soluble HLA-G level and its potential in the diagnosis of GC. Effect of HLA-G on Tregs was further assessed by coculture experiments in vitro. Most interestingly, HLA-G positive expression was detected in GC tissues and it was significantly correlated with the presence of tumor-infiltrating Tregs. Patients with HLA-G positive expression or high Tregs had significantly poorer survival at 5 years after operation. Multivariate analysis indicated that HLA-G positive expression was an independent prognostic factor of GC. The coculture experiment showed overexpression of HLA-G in GC cell lines significantly enhanced the frequency of Tregs when GC cells were directly cocultured with human peripheral blood mononuclear cell. However, this effect disappeared when the indirect coculture system was applied. Some cytokines such as interleukin-6, interleukin-10, and tumor necrosis factor-α significantly changed in the coculture system. Moreover, plasma soluble HLA-G level in GC patients was higher than that in normal controls. Taken together, our results indicated that HLA-G expression was closely associated with tumor progression and involved in tumor evasion by increasing the frequency of infiltrating Tregs locally. Thus, HLA-G might be a promising predictor for disease prognosis and a possible novel target for immunotherapy in GC patients.
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Affiliation(s)
- Lutao Du
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, China
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Vargas RG, Sarturi PR, Mattar SB, Bompeixe EP, Silva JDS, Pirri A, da Graça Bicalho M. Association of HLA-G alleles and 3′ UTR 14 bp haplotypes with recurrent miscarriage in Brazilian couples. Hum Immunol 2011; 72:479-85. [DOI: 10.1016/j.humimm.2011.02.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Revised: 02/14/2011] [Accepted: 02/22/2011] [Indexed: 11/26/2022]
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Prigione I, Penco F, Martini A, Gattorno M, Pistoia V, Morandi F. HLA-G and HLA-E in patients with juvenile idiopathic arthritis. Rheumatology (Oxford) 2011; 50:966-72. [PMID: 21186170 DOI: 10.1093/rheumatology/keq418] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023] Open
Abstract
OBJECTIVE To investigate the expression and release of HLA-G and HLA-E in JIA. METHODS Soluble (s)HLA-G and HLA-E were measured in sera from 58 JIA patients and 54 healthy donors. Surface expression of HLA-G, HLA-E and immunoglobulin-like transcript (ILT)2 and ILT4, two receptors for HLA-G, was assessed on T, B cells and monocytes from peripheral blood (PB) and SF of 12 JIA patients and from PB of 12 controls. RESULTS Serum sHLA-G concentration was significantly lower in patients than in controls. Both sHLA-G and sHLA-E were detected in SF and sHLA-E concentration in SF was higher in extended oligoarticular/polyarticular than in limited oligoarticular JIA. Patients compared with controls showed: (i) down-regulation of HLA-E and ILT2 expression on T cells; (ii) up-regulation of HLA-E expression on B cells and monocytes; and (iii) down-regulation of ILT4 expression on monocytes. Comparing JIA patients' SF and PB we found: (i) up-regulation of HLA-E and ILT2 expression in T and B cells and monocytes; and (ii) down-regulation of ILT4 expression in monocytes. ILT4 was up-regulated in monocytes from oligoarticular extended/polyarticular compared with oligoarticular limited JIA. CONCLUSIONS A lower concentration of sHLA-G in sera may predispose to JIA, as observed for other autoimmune diseases. sHLA-E concentration in SF correlate with the number of affected joints. Higher ILT2 expression on SF cell populations compared with PB may be related to high sHLA-G concentration in SF. Higher HLA-E expression in SF than in PB cell populations may protect them from NK cytolysis.
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Affiliation(s)
- Ignazia Prigione
- Laboratory of Oncology, G. Gaslini Scientific Institute, Largo G. Gaslini 5, 16148 Genova, Italy
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Chiusolo P, Bellesi S, Piccirillo N, Giammarco S, Marietti S, De Ritis D, Metafuni E, Stignani M, Baricordi OR, Sica S, Leone G, Rizzo R. The role of HLA--G 14-bp polymorphism in allo-HSCT after short-term course MTX for GvHD prophylaxis. Bone Marrow Transplant 2011; 47:120-4. [PMID: 21399669 DOI: 10.1038/bmt.2011.40] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
HLA-G molecules are HLA class Ib antigens characterized by tolerogenic and immunoinhibitory functions. The HLA-G 14-bp insertion/deletion (ins/del) polymorphism controls protein expression and seems to be implicated in both MTX treatment response and SCT outcome. The aim of our study is to evaluate the role of HLA-G 14 bp polymorphism in subjects affected by hematological malignancies undergoing allo-SCT and receiving MTX therapy for GvHD prophylaxis. We performed a retrospective analysis of HLA-G 14 bp polymorphism using a specific PCR in 47 recipients and in their respective donors, and evaluated the correlation with the incidence of aGvHD, OS and disease-free survival (DFS) after allo-SCT. We did not observe any correlation between this polymorphism and the risk of aGvHD occurrence. On the contrary, we found that the recipients with a 14 bp ins/14 bp ins genotype were characterized by a lower OS and DFS in univariate and multivariate analysis (OS=OR: 3.235; DFS=OR: 3.302). These data indicate a role for recipient HLA-G 14 bp polymorphism in allo-SCT immunotolerance status and follow-up.
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Affiliation(s)
- P Chiusolo
- Hematology Department, Istituto di Ematologia, Università Cattolica del Sacro Cuore, Rome, Italy.
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