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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
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C-reactive protein - My perspective on its first half century, 1930-1982.

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C-reactive protein (CRP), an acute phase protein, binds to C-polysaccharide and activates innate immunity. It is produced by hepatocytes and aids in clearing bacteria and necrotic tissue.

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C-reactive proteinRockefeller Instituteacute phase responsecomplementphagocytosis

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Area of Science:

  • Biochemistry
  • Immunology
  • Molecular Biology

Background:

  • C-reactive protein (CRP) discovered in 1930, initially linked to pneumococcal pneumonia.
  • CRP binds to C-polysaccharide via its phosphorylcholine moiety.
  • CRP is a pentraxin composed of five identical subunits.

Purpose of the Study:

  • To elucidate the structure and function of C-reactive protein.
  • To understand CRP's role in innate immunity and inflammatory states.
  • To investigate CRP's evolutionary conservation and origin.

Main Methods:

  • Biochemical analysis to determine molecular structure and binding properties.
  • Immunological assays to study complement activation and phagocytosis.
  • In vivo studies in mice to assess protective effects against pathogens.

Main Results:

  • CRP structure elucidated as a cyclic pentamer.
  • CRP identified as a hepatocyte-derived acute phase protein.
  • CRP activates complement and enhances phagocytosis, offering protection against pneumococcus.

Conclusions:

  • CRP is a key component of innate immunity, involved in pathogen clearance and tissue repair.
  • CRP functions as an acute phase reactant, responding to inflammation.
  • CRP is an evolutionarily conserved molecule with critical protective roles.