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Diagnosing protein S deficiency: analytical considerations.

Kristina E M Persson1, Björn Dahlbäck, Andreas Hillarp

  • 1Department of Clinical Chemistry, Lund University, University Hospital, SE-205 02 Malmö, Sweden. Kristina.Persson@klkemi.mas.lu.se

Clinical Laboratory
|April 23, 2003
PubMed
Summary

Protein S deficiency increases thrombosis risk, but diagnosis is challenging. This review details protein S, its gene, molecule, and plasma measurement, highlighting improved diagnostic methods for better prediction.

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Area of Science:

  • Biochemistry
  • Hematology
  • Genetics

Background:

  • Protein S is a crucial cofactor for activated protein C (APC) in regulating blood coagulation.
  • Circulating protein S is largely bound to C4b-binding protein in plasma.
  • Protein S deficiency is a known risk factor for thrombosis, yet diagnosis remains complex.

Purpose of the Study:

  • To provide a comprehensive overview of protein S, encompassing its genetic basis, molecular characteristics, and plasma measurement techniques.
  • To address the diagnostic challenges associated with protein S deficiency.
  • To emphasize the importance of standardized methods for accurate prediction of protein S deficiency.

Main Methods:

  • Review of existing literature on protein S.
  • Discussion of genetic and molecular aspects of protein S.
  • Analysis of current and emerging methods for plasma protein S measurement.

Main Results:

  • Most protein S deficiencies are quantitative, with few qualitative variants identified.
  • Accurate measurement of plasma protein S is essential for diagnosing deficiency.
  • Standardization of assays and sample handling protocols are critical for reliable results.

Conclusions:

  • Improved diagnostic strategies, including standardized assays and protocols, are necessary for accurate prediction of protein S deficiency.
  • Understanding the gene, protein, and measurement of protein S is key to managing thrombosis risk associated with its deficiency.