Adaptor Proteins, Signal Transducing; Myasthenia Gravis/metabolism; Proto-Oncogene Proteins c-myc/metabolism; Repressor Proteins; Thymus Gland/metabolism; Transcription Factors; Adult; Apoptosis; Basic Helix-Loop-Helix Leucine Zipper Transcription Factors; Basic-Leucine Zipper Transcription Factors; Carrier Proteins/genetics; Carrier Proteins/metabolism; Caspase 3; Caspases/genetics; Caspases/metabolism; DNA-Binding Proteins/genetics; DNA-Binding Proteins/metabolism; Endosomal Sorting Complexes Required for Transport; Female; Humans; Male; Myasthenia Gravis/pathology; NF-kappa B/genetics; NF-kappa B/metabolism; Phosphoproteins/genetics; Phosphoproteins/metabolism; Protein Precursors/genetics; Protein Precursors/metabolism; Proto-Oncogene Proteins c-bcl-2/genetics; Proto-Oncogene Proteins c-bcl-2/metabolism; Proto-Oncogene Proteins c-myc/genetics; Proto-Oncogene Proteins c-rel/genetics; Proto-Oncogene Proteins c-rel/metabolism; RNA, Messenger/metabolism; Reverse Transcriptase Polymerase Chain Reaction; Signal Transduction; T-Lymphocytes/immunology; T-Lymphocytes/pathology; Thymosin/analogs & derivatives; Thymosin/genetics; Thymosin/metabolism; Thymus Gland/pathology; Transcription Factor RelA; bcl-Associated Death Protein; bcl-X Protein