This gene encodes the alpha chain of the interleukin-4 receptor, a type I transmembrane protein that can bind interleukin 4 and interleukin 13 to regulate IgE production. The encoded protein also can bind interleukin 4 to promote differentiation of Th2 cells. A soluble form of the encoded protein can be produced by proteolysis of the membrane-bound protein, and this soluble form can inhibit IL4-mediated cell proliferation and IL5 upregulation by T-cells. Allelic variations in this gene have been associated with atopy, a condition that can manifest itself as allergic rhinitis, sinusitus, asthma, or eczema. Polymorphisms in this gene are also associated with resistance to human immunodeficiency virus type-1 infection. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Apr 2012] CIViC Summary for IL4R Gene
Forensic Context
A study in humans demonstrated that the IL4R was significantly upregulated in mature B cells from patients with plaque rupture, indicating its association with pro-inflammatory characteristics in acute myocardial infarction [Jun Qian et al. DOI:10.3389/fimmu.2022.908815]. In porcine skin, the IL4R was decreased in response to thermal exposure at seven days post-injury, as part of the transcriptional changes associated with wound healing [Price et al. DOI:10.080/15569520903097754].