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Autoimmune disease-associated histamine receptor H1 alleles exhibit differential protein trafficking and cell surface expression
Journal article   Open access   Peer reviewed

Autoimmune disease-associated histamine receptor H1 alleles exhibit differential protein trafficking and cell surface expression

Rajkumar Noubade, Naresha Saligrama, Karen Spach, Roxana Del Rio, Elizabeth P Blankenhorn, Theodoros Kantidakis, Graeme Milligan, Mercedes Rincon and Cory Teuscher
The Journal of immunology (1950), v 180(11), pp 7471-7479
01 Jun 2008
PMID: 18490747
url
https://doi.org/10.4049/jimmunol.180.11.7471View
Accepted (AM)Open Access (License Unspecified) Open

Abstract

Haplotypes Encephalomyelitis, Autoimmune, Experimental - immunology Endoplasmic Reticulum - metabolism Receptors, Histamine H1 - deficiency Male Autoimmune Diseases - genetics Receptors, Histamine H1 - metabolism T-Lymphocytes - metabolism Receptors, Histamine H1 - genetics Cell Membrane - metabolism Encephalomyelitis, Autoimmune, Experimental - genetics Cell Line Genetic Predisposition to Disease GTP-Binding Protein alpha Subunits - metabolism Mice, Inbred C57BL Receptors, Histamine H1 - immunology Autoimmune Diseases - immunology Mice, Transgenic Orchitis - genetics Polymorphism, Genetic Protein Transport Animals Alleles Mice Orchitis - immunology
Structural polymorphisms (L263P, M313V, and S331P) in the third intracellular loop of the murine histamine receptor H(1) (H(1)R) are candidates for Bphs, a shared autoimmune disease locus in experimental allergic encephalomyelitis and experimental allergic orchitis. The P-V-P haplotype is associated with increased disease susceptibility (H(1)R(S)) whereas the L-M-S haplotype is associated with less severe disease (H(1)R(R)). In this study, we show that selective re-expression of the H(1)R(S) allele in T cells fully complements experimental allergic encephalomyelitis susceptibility and the production of disease-associated cytokines while selective re-expression of the H(1)R(R) allele does not. Mechanistically, we show that the two H(1)R alleles exhibit differential cell surface expression and altered intracellular trafficking, with the H(1)R(R) allele being retained within the endoplasmic reticulum. Moreover, we show that all three residues (L-M-S) comprising the H(1)R(R) haplotype are required for altered expression. These data are the first to demonstrate that structural polymorphisms influencing cell surface expression of a G protein-coupled receptor in T cells regulates immune functions and autoimmune disease susceptibility.

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Immunology
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