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HLA‐F transcriptional and protein differential expression according to its genetic polymorphisms

Authors :
Julien Paganini
Pierre Faux
Sophie Beley
Christophe Picard
Jacques Chiaroni
Julie Di Cristofaro
XEGEN, 15 rue de la République, 13420, Gémenos
Génétique Physiologie et Systèmes d'Elevage (GenPhySE )
Ecole Nationale Vétérinaire de Toulouse (ENVT)
Institut National Polytechnique (Toulouse) (Toulouse INP)
Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP)
Université de Toulouse (UT)-Université de Toulouse (UT)-École nationale supérieure agronomique de Toulouse (ENSAT)
Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Anthropologie bio-culturelle, Droit, Ethique et Santé (ADES)
Aix Marseille Université (AMU)-EFS ALPES MEDITERRANEE-Centre National de la Recherche Scientifique (CNRS)
Etablissement Français du Sang Provence-Alpes Côte-d'Azur et Corse (EFS)
Source :
HLA: Immune Response Genetics, HLA: Immune Response Genetics, 2023, ⟨10.1111/tan.15087⟩
Publication Year :
2023
Publisher :
HAL CCSD, 2023.

Abstract

International audience; Many specificities single out HLA-F: its structure, expression regulation at cell membrane and function. HLA-F mRNA is detected in the most cell types and the protein is localized in the ER and Golgi apparatus. When expressed at cell surface, HLA-F may be associated to β2-microglobulin and peptide or expressed as an open-conformer molecule. HLA-F reaches the membrane upon activation of different primary cell types and cell-lines. HLA-F has its highest affinity for the KIR3DS1-activating NK receptor, but also binds inhibitory immune receptors. Some studies reported that HLA-F expression is associated with its genotype. Higher HLA-F mRNA expression associated with F*01:01:02, and 3 noncoding SNPs, rs1362126, rs2523405, and rs2523393, located in HLA-F-AS1 or upstream the HLA-F sequence were associated with HLA-F mRNA expression. Given the implication of HLA-F in many clinical setting, and the undisclosed process of its expression regulation, we aim to confirm the effect of the aforementioned SNPs with HLA-F transcriptional and protein expression. We analyzed the distribution, frequency and linkage disequilibrium of these SNPs at worldwide scale in the 1000 Genomes Project samples. Influence on the genotype of each SNP on HLA-F expression was explored using RNAseq data from the 1000 Genomes Project, and using Q-PCR and intracellular cytometry in PBMC from healthy individuals. Our results show that the SNPs under studied displayed remarkably different allelic proportion according to geography and confirm that rs1362126, rs2523405, and rs2523393 displayed the most concordant results, with the highest effect size and a double-dose effect.

Details

Language :
English
ISSN :
20592302 and 20592310
Database :
OpenAIRE
Journal :
HLA: Immune Response Genetics, HLA: Immune Response Genetics, 2023, ⟨10.1111/tan.15087⟩
Accession number :
edsair.doi.dedup.....f28516c295bba517e33c367f60442c6b
Full Text :
https://doi.org/10.1111/tan.15087⟩