ADAMTS13 mutations and polymorphisms in congenital thrombotic thrombocytopenic purpura

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114 Citations (Scopus)

Abstract

Congenital thrombotic thrombocytopenic purpura (TTP) (also known as Upshaw-Schulman syndrome, USS) is a rare, life-threatening disease characterized by thrombocytopenia and microangiopathic hemolytic anemia, associated with the deficiency of the von Willebrand factor-cleaving protease (ADAMTS13) due to mutations in the corresponding gene. The spectrum of clinical phenotype in congenital TTP is wide, encompassing neonatal-onset disease and adultonset disease, forms with a single disease episode and chronic-relapsing forms. We review ADAMTS13 gene variants associated with inherited ADAMTS13 deficiency and congenital TTP. To date, 76 mutations of ADAMTS13 are reported in the literature. Missense mutations, which constitute nearly 60% of ADAMTS13 mutations, preferentially localize in the 5′-half of the gene encoding the N-terminal half of the protein, where the domains that are indispensable for ADAMTS13 catalytic function are situated. In vitro expression studies in cell cultures have shown that defects in protein secretion and catalytic activity are the main mechanisms responsible for the deficiency of ADAMTS13 in congenital TTP patients. Even if data from the literature suggest the existence of genotype-phenotype correlations, a clear relationship between the type and the effect of ADAMTS13 genetic defects with disease manifestations remains to be established.

Original languageEnglish
Pages (from-to)11-19
Number of pages9
JournalHuman Mutation
Volume31
Issue number1
DOIs
Publication statusPublished - Jan 2010

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Thrombotic Thrombocytopenic Purpura
Mutation
Infant, Newborn, Diseases
Genes
Hemolytic Anemia
Genetic Association Studies
Missense Mutation
Thrombocytopenia
Chronic Disease
Cell Culture Techniques
Phenotype
Proteins

Keywords

  • ADAMTS13
  • TTP
  • Upshaw-Schulman syndrome
  • USS

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

Cite this

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abstract = "Congenital thrombotic thrombocytopenic purpura (TTP) (also known as Upshaw-Schulman syndrome, USS) is a rare, life-threatening disease characterized by thrombocytopenia and microangiopathic hemolytic anemia, associated with the deficiency of the von Willebrand factor-cleaving protease (ADAMTS13) due to mutations in the corresponding gene. The spectrum of clinical phenotype in congenital TTP is wide, encompassing neonatal-onset disease and adultonset disease, forms with a single disease episode and chronic-relapsing forms. We review ADAMTS13 gene variants associated with inherited ADAMTS13 deficiency and congenital TTP. To date, 76 mutations of ADAMTS13 are reported in the literature. Missense mutations, which constitute nearly 60{\%} of ADAMTS13 mutations, preferentially localize in the 5′-half of the gene encoding the N-terminal half of the protein, where the domains that are indispensable for ADAMTS13 catalytic function are situated. In vitro expression studies in cell cultures have shown that defects in protein secretion and catalytic activity are the main mechanisms responsible for the deficiency of ADAMTS13 in congenital TTP patients. Even if data from the literature suggest the existence of genotype-phenotype correlations, a clear relationship between the type and the effect of ADAMTS13 genetic defects with disease manifestations remains to be established.",
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