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Dual immunoglobulin light chain B cells: Trojan horses of autoimmunity? #MMPMID24549093
Pelanda R
Curr Opin Immunol 2014[Apr]; ä (ä): 53-9 PMID24549093show ga
Receptor editing, a major mechanism of B cell tolerance, can also lead to allelic inclusion at the immunoglobulin light chain loci and the development of B cells that co-express two different immunoglobulin light chains and, therefore, two antibody specificities. Most allelically included B cells express two ? chains, although rare dual-? cells are also observed. Moreover, these cells typically co-express an autoreactive and a nonautoreactive antibody. Thus, allelically included B cells could operate like ?Trojan horses?: expression and function of the nonautoreactive antigen receptors might promote their maturation, activation, and terminal differentiation into effector cells that also express and secrete autoantibodies. Indeed, dual-? B cells are greatly expanded into effector B cell subsets in some autoimmune mice, thus indicating they might play an important role in disease.