Isolation of potent human Fab fragments against a novel highly immunogenic region on human muscle acetylcholine receptor which protect the receptor from myasthenic autoantibodies.
In the autoimmune disease myasthenia gravis (MG), antibodies against the muscle nicotinic acetylcholine receptor (AChR) cause loss of functional AChR in the neuromuscular junction. To isolate AChR-specific human antibody fragments (Fab), a phage-display library was constructed from an MG patient's thymic B lymphocytes. The first Fab isolated had a low affinity for human AChR, but two sequential antibody chain shufflings using the MG donor heavy and light chain gene repertoires resulted in iso...Expand abstract
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