Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
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Παρασκευή 21 Δεκεμβρίου 2018

Autoimmunity-associated intronic SNP (rs2281808) detected by a simple phenotypic assay: Unique case or broader opportunity?

Publication date: Available online 21 December 2018

Source: Clinical Immunology

Author(s): Sushmita Sinha, Pranav S. Renavikar, Michael P. Crawford, Jake W. Rodgers, Eva Tsalikian, Michael Tansey, Nitin J. Karandikar

Abstract

Multiple genome-wide association studies have shown that the single-nucleotide polymorphism (SNP) rs2281808 TT variant, present within the signal regulatory protein gamma (SIRPG) gene, is associated with autoimmune diseases, such as type 1 diabetes. SIRPγ is the only SIRP expressed on T cells. The role of SIRPγ in human T-cells or the effect of the TT variant are poorly understood. In this short report, we demonstrate the rather unusual finding that this intronic SNP is associated with a reduction of SIRPγ expression on T cells, both in healthy subjects as well as patients with type 1 diabetes. Using this information, we propose that a simple flow cytometric detection of SIRPγ could be a potential diagnostic testing approach for the presence of SNP in the appropriate clinical context.



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