CD4(+) T cells specific for the acetylcholine receptor (AChR) are assumed to play an important role in pathogenesis of myasthenia gravis (MG). A large and diverse number of potential T cell epitopes have been reported for different experimental setups aiming at the identification of disease-relevant T cells in MG. Investigating the T cell response to the epsilon subunit of human AChR, we explore complementary in vitro and in vivo approaches (PBMC from MG patients and mice transgenic for HLA-DR3 and human CD4) to address the possibilities and limitations of different strategies for elucidating natural autoimmune T cell epitopes.
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