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Di Bona D, Pandey JP, Aiello A, Bilancia M, Candore G, Caruso C, Colomba C, Duro G, Ligotti ME, Macchia L, Rizzo S, Accardi G. The immunoglobulin γ marker 17 allotype and KIR/HLA genes prevent the development of chronic hepatitis B in humans. Immunology 2019; 159:178-182. [PMID: 31613998 DOI: 10.1111/imm.13133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 09/18/2019] [Accepted: 10/09/2019] [Indexed: 01/02/2023] Open
Abstract
Hepatitis B virus (HBV) infection causes a self-limiting disease in most individuals. However, < 10% of infected subjects develop a chronic disease. Genetic host variability of polymorphic genes at the interface of innate and acquired immunity, such as killer immunoglobulin-like receptors (KIR), their human leucocyte antigen (HLA) and IgG allotypes (GM), could explain this different clinical picture. We previously showed a protective role of the KIR2DL3 gene for the development of chronic hepatitis B (CHB), and a detrimental role of the KIR ligand groups, HLA-A-Bw4 and HLA-C2. We have expanded the previous analysis genotyping patients for GM23 and GM3/17 allotypes. The comparison of the patients with CHB with those who resolved HBV infection showed that the presence of GM17 allele virtually eliminated the risk of developing CHB (OR, 0·03; 95% CI, 0·004-0·16; P < 0·0001). In addition, the combination of GM17, KIR2DL3, HLA-A-Bw4 and HLA-C2 was highly sensitive to predict the outcome of HBV infection.
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Affiliation(s)
- Danilo Di Bona
- Dipartimento dell'Emergenza e dei Trapianti d'Organo, Università di Bari Aldo Moro, Bari, Italy
| | - Janardan P Pandey
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, USA
| | - Anna Aiello
- Laboratorio di Immunopatologia e Immunosenescenza, Dipartimento di Biomedicina, Neuroscienze e Diagnostica Avanzata, Università di Palermo, Palermo, Italy
| | - Massimo Bilancia
- Dipartmento Jonico in Sistemi Giuridici ed Economici del Mediterraneo: società, ambiente, culture, Università di Bari Aldo Moro, Bari, Italy
| | - Giuseppina Candore
- Laboratorio di Immunopatologia e Immunosenescenza, Dipartimento di Biomedicina, Neuroscienze e Diagnostica Avanzata, Università di Palermo, Palermo, Italy
| | - Calogero Caruso
- Laboratorio di Immunopatologia e Immunosenescenza, Dipartimento di Biomedicina, Neuroscienze e Diagnostica Avanzata, Università di Palermo, Palermo, Italy
| | - Claudia Colomba
- Dipartimento di Scienze per la Promozione della Salute e Materno-Infantile 'G. D'Alessandro', Università di Palermo, Palermo, Italy
| | - Giovanni Duro
- Istituto di Biomedicina ed Immunologia Molecolare, Consiglio Nazionale delle Ricerche, Palermo, Italy
| | - Mattia Emanuela Ligotti
- Laboratorio di Immunopatologia e Immunosenescenza, Dipartimento di Biomedicina, Neuroscienze e Diagnostica Avanzata, Università di Palermo, Palermo, Italy
| | - Luigi Macchia
- Dipartimento dell'Emergenza e dei Trapianti d'Organo, Università di Bari Aldo Moro, Bari, Italy
| | - Sergio Rizzo
- Unità Operativa di Medicina Trasfusionale, AOUP, Palermo, Italy
| | - Giulia Accardi
- Laboratorio di Immunopatologia e Immunosenescenza, Dipartimento di Biomedicina, Neuroscienze e Diagnostica Avanzata, Università di Palermo, Palermo, Italy
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2
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Boesch AW, Kappel JH, Mahan AE, Chu TH, Crowley AR, Osei-Owusu NY, Alter G, Ackerman ME. Enrichment of high affinity subclasses and glycoforms from serum-derived IgG using FcγRs as affinity ligands. Biotechnol Bioeng 2018; 115:1265-1278. [PMID: 29315477 DOI: 10.1002/bit.26545] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 12/18/2017] [Accepted: 01/03/2018] [Indexed: 12/26/2022]
Abstract
As antibodies continue to gain predominance in drug discovery and development pipelines, efforts to control and optimize their activity in vivo have matured to incorporate sophisticated abilities to manipulate engagement of specific Fc binding partners. Such efforts to promote diverse functional outcomes include modulating IgG-Fc affinity for FcγRs to alternatively potentiate or reduce effector functions, such as antibody-dependent cellular cytotoxicity and phagocytosis. While a number of natural and engineered Fc features capable of eliciting variable effector functions have been demonstrated in vitro and in vivo, elucidation of these important functional relationships has taken significant effort through use of diverse genetic, cellular and enzymatic techniques. As an orthogonal approach, we demonstrate use of FcγR as chromatographic affinity ligands to enrich and therefore simultaneously identify favored binding species from a complex mixture of serum-derived pooled polycloncal human IgG, a load material that contains the natural repertoire of Fc variants and post-translational modifications. The FcγR-enriched IgG was characterized for subclass and glycoform composition and the impact of this bioseparation step on antibody activity was measured in cell-based effector function assays including Natural Killer cell activation and monocyte phagocytosis. This work demonstrates a tractable means to rapidly distinguish complex functional relationships between two or more interacting biological agents by leveraging affinity chromatography followed by secondary analysis with high-resolution biophysical and functional assays and emphasizes a platform capable of surveying diverse natural post-translational modifications that may not be easily produced with high purity or easily accessible with recombinant expression techniques.
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Affiliation(s)
- Austin W Boesch
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire
- Zepteon, Inc., Boston, Massachusetts
| | - James H Kappel
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire
| | - Alison E Mahan
- Ragon Institute of MGH, MIT, and Harvard University, Cambridge, Massachusetts
| | - Thach H Chu
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire
| | - Andrew R Crowley
- Department of Microbiology and Immunology, Geisel School of Medicine, Hanover, New Hampshire
| | - Nana Y Osei-Owusu
- Department of Microbiology and Immunology, Geisel School of Medicine, Hanover, New Hampshire
| | - Galit Alter
- Ragon Institute of MGH, MIT, and Harvard University, Cambridge, Massachusetts
| | - Margaret E Ackerman
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire
- Department of Microbiology and Immunology, Geisel School of Medicine, Hanover, New Hampshire
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Immunoglobulin GM and FcγRIIIa genotypes influence cytotoxicity of neuroblastoma cells. J Neuroimmunol 2014; 270:95-7. [PMID: 24662005 DOI: 10.1016/j.jneuroim.2014.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Accepted: 03/02/2014] [Indexed: 12/20/2022]
Abstract
Immunoglobulin GM (γ marker) allotypes are strongly associated with neuroblastoma, but the mechanism is not known. One mechanism could involve antibody-dependent cell-mediated cytotoxicity (ADCC) of neuroblastoma cells. Using an ADCC inhibition assay, we show that IgG1 expressing GM 3+,1-,2- allotypes blocked all phenylalanine-expressing FcγRIIIa present on NK cells, resulting in total inhibition of anti-GD2 antibody-mediated ADCC of GD2-overexpressing neuroblastoma cells. In contrast, the inhibitory effect of this protein was significantly lower when the NK cells were homozygous for the valine allele of FcγRIIIa (100 vs. 21%; p=0.00004). These and other findings presented here could lead to a more effective immunotherapy of neuroblastoma.
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