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Related Experiment Videos

Dysplasminogenemias.

K C Robbins1

  • 1Department of Medicine, University of Chicago Medical Center/Michael Reese Hospital and Medical Center, Ill.

Enzyme
|January 1, 1988
PubMed
Summary
This summary is machine-generated.

Genetic variations in plasminogen are linked to dysplasminogenemias. This review details methods for identifying abnormal plasminogen and classifies variants based on functional defects.

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Area of Science:

  • Biochemistry
  • Genetics
  • Hematology

Background:

  • Dysplasminogenemias are increasingly linked to genetic polymorphisms of plasminogen.
  • Plasminogen variants have been identified in families across America, Japan, and Europe.

Purpose of the Study:

  • To review the growing relationship between genetic plasminogen polymorphisms and dysplasminogenemias.
  • To detail methods for identifying abnormal plasminogens and classify identified variants.

Main Methods:

  • Assessing plasminogen functional to antigen ratios.
  • Measuring plasmin generation rates with various activators (urokinase, streptokinase).
  • Analyzing plasma and purified plasminogen isoelectric forms.

Main Results:

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  • Functional defects, including altered plasminogen activation kinetics, were reviewed.
  • A molecular defect (single amino acid substitution) was identified in the Tochigi I family.
  • Plasminogen variants were classified into two main groups based on functional defects.

Conclusions:

  • Abnormal plasminogen variants exhibit distinct functional characteristics.
  • Variants either lack a functioning active center or show altered activation kinetics.
  • Further research is needed to understand the full spectrum of dysplasminogenemias.