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  • Title: Two familial cases with tumor necrosis factor receptor-associated periodic syndrome caused by a non-cysteine mutation (T50M) in the TNFRSF1A gene associated with severe multiorganic amyloidosis.
    Author: Kallinich T, Briese S, Roesler J, Rudolph B, Sarioglu N, Blankenstein O, Keitzer R, Querfeld U, Haffner D.
    Journal: J Rheumatol; 2004 Dec; 31(12):2519-22. PubMed ID: 15570662.
    Abstract:
    An adolescent boy had had recurrent episodes of fever, abdominal pain, and arthralgias since the age of 7 years. Progressive renal failure due to renal amyloidosis developed, leading to renal transplant at the age of 14.5 years. Five years later, he developed AA amyloidosis in the transplant as well as the thyroid gland. His father had had similar symptoms including systemic amyloidosis since the age of 6 years. DNA sequence analysis revealed a heterozygous mutation in the TNFRSF1A (TNFa-receptor 1) gene (T50M) in both father and son causing tumor necrosis factor receptor-associated periodic syndrome (TRAPS). Previous phenotype/genotype analyses have proposed that this mutation is usually not associated with the occurrence of amyloidosis. This difference in the clinical course in different families may indicate a strong influence of modifier genes. Treatment with a TNFRSF1B fusion protein TNF antagonist (etanercept) favorably influenced the disease course.
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