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Related Experiment Videos

Virus inactivated single-donor fresh plasma preparations.

H Mohr1, B Lambrecht, J Knuever-Hopf

  • 1DRK-Blutspendedienst Niedersachsen.

Infusionstherapie Und Transfusionsmedizin
|April 1, 1992
PubMed
Summary

Photodynamic therapy using phenothiazine dyes inactivates viruses in fresh plasma, preserving protein function. This method shows promise for safe, virus-inactivated plasma transfusions.

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Area of Science:

  • Biomedical science
  • Blood product safety
  • Photodynamic therapy

Background:

  • Blood transfusions carry a risk of viral transmission.
  • Current methods for virus inactivation can affect plasma protein function.

Purpose of the Study:

  • To evaluate photodynamic therapy (PDT) for virus inactivation in human fresh plasma.
  • To assess the impact of PDT on plasma protein integrity and function.

Main Methods:

  • Human fresh plasma units were treated with visible light and low concentrations of methylene blue or toluidine blue.
  • Viral infectivity was tested, along with functional and immunological properties of plasma proteins.
  • Animal studies and initial clinical data were analyzed.

Main Results:

  • PDT effectively inactivated numerous lipid-enveloped viruses, including human immune deficiency virus-1.
  • Plasma protein functional activities and immunological properties were only moderately affected.
  • Animal and early clinical data indicate good tolerability of PDT-treated plasma.

Conclusions:

  • Photodynamic therapy is a viable method for inactivating viruses in fresh plasma.
  • This approach offers a promising alternative for producing safe blood products with preserved functionality.

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