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Related Experiment Videos

Haemoglobin-based blood substitutes and sepsis

E Griffiths1, A Cortes, N Gilbert

  • 1National Institute for Biological Standards and Control, South Mimms, Hertfordshire, UK.

Lancet (London, England)
|January 21, 1995
PubMed
Summary

Cell-free hemoglobin blood substitutes may increase susceptibility to bacterial infections. Studies show pyridoxalated polymerized hemoglobin can worsen E. coli infections in mice, indicating potential clinical risks.

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Area of Science:

  • Biomedical research
  • Hematology
  • Infectious disease

Background:

  • Cell-free hemoglobin (CFH) based blood substitutes are under development.
  • A potential risk is increased susceptibility to bacterial infections.

Purpose of the Study:

  • To investigate the impact of CFH on bacterial infection susceptibility.
  • To assess the safety of pyridoxalated polymerized human hemoglobin (PPHH) in a preclinical model.

Main Methods:

  • Mice were infused with PPHH.
  • Mice were subsequently infected with Escherichia coli.

Main Results:

  • PPHH infusion promoted fulminating E. coli septicemia in mice.
  • Significant increase in mortality and disease severity was observed.

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Conclusions:

  • PPHH may enhance susceptibility to bacterial infections.
  • These findings highlight potential dangers of CFH products in clinical settings.