Fibrinogen Aα Chain Leu 554

An African-American kindred with late onset renal amyloidosis

Tomoyuki Uemichi, Juris J. Liepnieks, Morie A. Gertz, Merrill Benson

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

An African-American kindred with renal amyloidosis is described. Four members in two generations developed nephropathy in the sixth to eighth decade of life. Kidney biopsy and subcutaneous fat aspirate biopsy of one patient revealed amyloid deposits. DNA analysis showed that patients were heterozygous for a mutation in the fibrinogen A a chain gene with a guanine to thymine transversion at the second base of codon 554, predicting a leucine for arginine substitution. Peptide sequence analysis of isolated plasma fibrinogen showed normal peptide as well as variantpeptide with leucine replacing arginine at position 554, as predicted by the DNA sequence. The ratio between normal and variant peptides was approximately 1:1 in one patient and 3:2 in another. Although this African-American kindred has the exact same mutation as a previously described Peruvian-Mexican kindred, the onset age in this kindred is much later than in the Peruvian-Mexican kindred. This finding may indicate the existence of additional factor(s) beside the primary causative genetic mutation, which affect the expression of the disease.

Original languageEnglish
Pages (from-to)188-192
Number of pages5
JournalAmyloid
Volume5
Issue number3
StatePublished - 1998

Fingerprint

Amyloidosis
African Americans
Fibrinogen
Kidney
Leucine
Mutation
Arginine
Biopsy
Peptides
Thymine
Subcutaneous Fat
Protein Sequence Analysis
Amyloid Plaques
Guanine
Age of Onset
Codon
DNA
Genes

Keywords

  • Amyloidosis
  • Fibrinogen
  • Haplotype
  • Kidney
  • Nephrotic syndrome

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Medicine(all)

Cite this

Fibrinogen Aα Chain Leu 554 : An African-American kindred with late onset renal amyloidosis. / Uemichi, Tomoyuki; Liepnieks, Juris J.; Gertz, Morie A.; Benson, Merrill.

In: Amyloid, Vol. 5, No. 3, 1998, p. 188-192.

Research output: Contribution to journalArticle

Uemichi, T, Liepnieks, JJ, Gertz, MA & Benson, M 1998, 'Fibrinogen Aα Chain Leu 554: An African-American kindred with late onset renal amyloidosis', Amyloid, vol. 5, no. 3, pp. 188-192.
Uemichi, Tomoyuki ; Liepnieks, Juris J. ; Gertz, Morie A. ; Benson, Merrill. / Fibrinogen Aα Chain Leu 554 : An African-American kindred with late onset renal amyloidosis. In: Amyloid. 1998 ; Vol. 5, No. 3. pp. 188-192.
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