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Double-seronegative myasthenia gravis (dSN-MG, without detectable AChR and MuSK antibodies) presents a serious gap in MG diagnosis and understanding. Recently, autoantibodies against the low-density lipoprotein receptor-related protein 4 (LRP4) have been identified in several dSN-MG sera, but with dramatic frequency variation (∼2-50%). We have developed a(More)
Congenital goiter (cog), a new autosomal recessive mutation in mice, has been mapped to the central region of chromosome 15. Young adult mutant mice are characterized by a reduced rate of growth, mild anemia, hypothyroidism, as indicated by significantly lower total serum T4 and T3, and elevated serum TSH. Thyroids from mutant mice are hypertrophied,(More)
Underlying the Lambert-Eaton myasthenic syndrome (LEMS) is a decrease in the release of the neurotransmitter acetylcholine. Only few reports on light and transmission electron microscopical observations of motor endplates in LEMS are available and changes reported so far differ from those found in experimental blocking of acetylcholine release. We performed(More)
Immunologists working in the field of autoimmunity tend to concentrate all their efforts on the elucidation of possible malfunctions of the immune system, particularly pathologic changes of immune regulation. Also in the OS model various groups of investigators emphasized this approach, although it was already clear early in the history of this model that(More)
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