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Related Experiment Videos

Viral inactivation in platelet concentrates

R Y Dodd1

  • 1American Red Cross Holland Laboratory, Rockville, MD 20855.

Transfusion Clinique Et Biologique : Journal De La Societe Francaise De Transfusion Sanguine
|January 1, 1994
PubMed
Summary

Photochemical inactivation using aminomethyl trimethyl psoralen (AMT) effectively inactivates viruses in platelet concentrates. This method preserves platelet quality while eliminating cell-associated and intracellular viruses, crucial for blood safety.

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Area of Science:

  • Blood component safety
  • Viral inactivation technologies
  • Transfusion medicine

Background:

  • Residual viral contamination in blood components remains a concern despite low transfusion-transmitted infection rates.
  • Human immunodeficiency virus (HIV) and hepatitis C virus (HCV) are significant transfusion-associated risks.
  • Effective viral inactivation methods must reduce viral titers by approximately 6 logs, addressing both free and cell-associated viruses.

Purpose of the Study:

  • To evaluate photochemical inactivation methods for blood components, specifically platelets.
  • To identify a method that inactivates viruses without compromising platelet viability and function.
  • To assess the efficacy of aminomethyl trimethyl psoralen (AMT) for viral inactivation in platelet concentrates.

Main Methods:

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  • Comparison of photodynamic dyes and ultraviolet-activated intercalating compounds for viral inactivation.
  • Testing of aminomethyl trimethyl psoralen (AMT) with long-wavelength ultraviolet light (UVA) on platelet concentrates.
  • Assessment of viral inactivation (model viruses, HIV) and platelet in vitro properties.
  • Polymerase chain reaction (PCR) to evaluate the inhibition of integrated HIV genome replication.

Main Results:

  • Photodynamic inactivators damaged platelets and were ineffective against viruses in platelet concentrates.
  • AMT, activated by UVA, inactivated over 5 logs of model viruses and HIV.
  • Platelet in vitro properties were maintained after AMT treatment.
  • AMT inactivated cell-associated and intracellular viruses and prevented integrated HIV genome replication.

Conclusions:

  • Aminomethyl trimethyl psoralen (AMT) activated by UVA is a promising method for viral inactivation in platelet concentrates.
  • AMT offers advantages over photodynamic methods by maintaining platelet quality and inactivating cell-associated viruses.
  • This technology has the potential to enhance the safety of platelet transfusions by reducing the risk of viral transmission.