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Structure and Function of Platelets01:18

Structure and Function of Platelets

The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000 platelets, with...

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Proteomic analysis of Intercept-treated platelets.

Michel Prudent1, David Crettaz, Julien Delobel

  • 1Service Régional Vaudois de Transfusion Sanguine, Lausanne, Switzerland.

Journal of Proteomics
|July 21, 2012
PubMed
Summary
This summary is machine-generated.

Pathogen reduction technologies enhance blood safety but may alter platelet function. Proteomic analysis shows the Intercept process minimally impacts platelet proteins, though some changes suggest oxidative stress and potential hemostatic effects.

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Area of Science:

  • Transfusion Medicine
  • Proteomics
  • Blood Product Safety

Background:

  • Transfusion medicine prioritizes safety against infections via donor selection and screening.
  • Pathogen reduction technologies (PRTs) combat bacterial contamination in blood products.
  • Recent studies question the efficacy of PRT-treated platelet concentrates (PCs).

Purpose of the Study:

  • To evaluate the proteomic impact of the Intercept pathogen reduction process on platelet concentrates.
  • To assess changes in platelet proteins during storage with and without Intercept treatment.

Main Methods:

  • Gel-based proteomic analysis of platelet concentrates (n=5).
  • Comparison of Intercept-treated and untreated PCs at storage days 1, 2, and 8.
  • Analysis focused on pooled buffy-coat derived PCs (10 donors per PC).

Main Results:

  • The Intercept process showed a low impact on the overall platelet proteome.
  • Specific protein modifications observed: DJ-1, glutaredoxin 5, and G(i)alpha 2.
  • Storage increased chloride intracellular channel protein 4 (CLIC4) and actin, irrespective of Intercept treatment.
  • DJ-1 and glutaredoxin 5 alterations suggest oxidative stress; G(i)alpha 2 modification indicates potential hemostatic effects.

Conclusions:

  • The Intercept PRT has a limited proteomic effect on platelet concentrates.
  • Observed protein changes may indicate oxidative stress and impact platelet hemostatic function.
  • Further research is needed to fully understand the clinical implications of these proteomic alterations.