Anti-AChR (Acetylcholine Receptor) Antibodies

Anti-AChR (acetylcholine receptor) antibodies are immune system proteins that mistakenly target and attack receptors on muscle cells responsible for receiving signals from nerves. This disruption impairs the communication needed for muscle contraction, leading to muscle weakness typical of conditions like myasthenia gravis. These antibodies interfere with normal nerve-to-muscle signaling, causing symptoms such as drooping eyelids, weakness, and fatigue. Their presence helps doctors diagnose autoimmune muscle disorders and understand the underlying immune response causing muscle dysfunction.