Abstract
Autoimmune autonomic ganglionopathy (AAG) is a rare disease wherein autoantibodies target the ganglionic acetylcholine receptor (gAChR). Current diagnosis in the United States depends upon clinical symptoms and positive autoantibody detection using a radioimmunoprecipitation assay (RIA). Here we offer a proof-of-principle study on an alternative method, fluorescence-detection size-exclusion-chromatography (FSEC). We show FSEC can detect autoantibodies against gAChR from patient sera but not healthy controls or samples from other autoimmune diseases. We compare FSEC to RIA and find good correlation. We discuss potential advantages of using FSEC as an alternative or as a first-step diagnostic prior to pursuing existing methodologies.
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