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Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Rev+Med+Virol 2021 ; 31 (6): e2236 Nephropedia Template TP
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Features of HLA class I expression and its clinical relevance in SARS-CoV-2: What do we know so far? #MMPMID33793006
Bouayad A
Rev Med Virol 2021[Nov]; 31 (6): e2236 PMID33793006show ga
Modifications in HLA-I expression are found in many viral diseases. They represent one of the immune evasion strategies most widely used by viruses to block antigen presentation and NK cell response, and SARS-CoV-2 is no exception. These alterations result from a combination of virus-specific factors, genetically encoded mechanisms, and the status of host defences and range from loss or upregulation of HLA-I molecules to selective increases of HLA-I alleles. In this review, I will first analyse characteristic features of altered HLA-I expression found in SARS-CoV-2. I will then discuss the potential factors underlying these defects, focussing on HLA-E and class-I-related (like) molecules and their receptors, the most documented HLA-I alterations. I will also draw attention to potential differences between cells transfected to express viral proteins and those presented as part of authentic infection. Consideration of these factors and others affecting HLA-I expression may provide us with improved possibilities for research into cellular immunity against viral variants.
|*Antigenic Variation[MESH]
|*Clonal Anergy[MESH]
|*Immune Evasion[MESH]
|Alleles[MESH]
|COVID-19/*immunology/pathology/virology[MESH]
|Cytokines/genetics/immunology[MESH]
|Cytotoxicity, Immunologic[MESH]
|Gene Expression[MESH]
|Histocompatibility Antigens Class I/genetics/*immunology[MESH]