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- W1972254064 abstract ": Hereditary systemic amyloidoses are autosomal dominant, late-onset disorders caused by mutations in the genes for a group of plasma proteins including transthyretin, lysozyme, fibrinogen Aα chain, gelsolin, apolipoprotein A-I, and apolipoprotein A-II. We investigated both phenotypic and genotypic aspects of apolipoprotein A-I amyloidosis unexpectedly disclosed by liver biopsy in 13 unrelated individuals with asymptomatic, persistent elevation of alkaline phosphatase and γ-glutamyltransferase levels. : Immunoelectron microscopy was used for in situ characterization of amyloid deposits on liver biopsy specimens. Mutation analysis was performed by sequencing of the apolipoprotein A-I gene in all patients. Wild-type/variant apolipoprotein A-I ratio in plasma high-density lipoproteins was assessed by a peptide mass fingerprinting approach after purification of total apolipoprotein A-I of 2 patients. : Family history was informative in 5 cases. Renal failure developed in 9 cases. Hypogonadism due to testicular involvement was observed. Amyloid fibrils specifically stained with anti-apolipoprotein A-I antibody. A novel (Leu75Pro) heterozygous mutation in the apolipoprotein A-I gene was present in affected individuals but not in controls. Variant apolipoprotein A-I was about 10% of the total protein in high-density lipoproteins. : The high number of individuals with apparently sporadic disease might reflect widespread occurrence of this mutation in the population and a milder phenotype of this variant compared with other apolipoprotein A-I amyloidogenic mutants. These findings suggest that specific staining for amyloid should be performed on liver biopsy of individuals with asymptomatic chronic elevation of alkaline phosphatase and γ-glutamyltransferase levels." @default.
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- W1972254064 date "2004-05-01" @default.
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- W1972254064 title "Liver biopsy discloses a new apolipoprotein A-I hereditary amyloidosis in several unrelated Italian families" @default.
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- W1972254064 doi "https://doi.org/10.1053/j.gastro.2004.03.003" @default.
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