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Related Experiment Videos

Beneficial effects of immunoisolated fetal and neonatal pig liver fragments on acute liver failure in a large animal.

N Kanai1, M Hagihara, Y Nagamachi

  • 1Department of Transplantation Immunology, Tokai University School of Medicine, Isehara, Kanagawa, Japan.

Cell Transplantation
|September 9, 1999
PubMed
Summary

Encapsulated fetal and neonatal liver fragments (FLF, NLF) show promise in preventing liver dysfunction. This xenotransplantation approach protected against immunological rejection in a large animal model of hepatic failure.

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Area of Science:

  • Hepatology and Transplantation Immunology
  • Xenotransplantation Research
  • Bioengineering and Regenerative Medicine

Background:

  • Xenogeneic cell transplantation is a potential interim therapy for organ allotransplantation.
  • Immunologic rejection remains a significant barrier to successful xenotransplantation.
  • Encapsulation technology offers a method to shield transplanted cells from immune attack.

Purpose of the Study:

  • To evaluate the efficacy of encapsulated fetal and neonatal liver fragments (FLF, NLF) as a therapeutic strategy for hepatic failure.
  • To assess the impact of xenotransplantation on liver function markers and host liver survival in a canine model.
  • To determine the survival and biological effects of encapsulated xenografts in beagles with induced liver injury.

Main Methods:

Related Experiment Videos

  • Experiment 1: Beagles with D-galactosamine-induced hepatic failure received varying doses of encapsulated fetal liver fragments (FLF).
  • Experiment 2: Beagles received encapsulated neonatal liver fragments (NLF) prior to D-galactosamine injection.
  • Liver function enzymes (ALT, AST) and total bilirubin levels were monitored. Histological examination assessed graft survival and host liver integrity.

Main Results:

  • A high dose of encapsulated FLF (2.0 g/kg) significantly reduced elevated ALT and total bilirubin levels.
  • Histology confirmed survival of host hepatocytes within the high-dose FLF grafts.
  • Encapsulated NLF transplantation led to significantly lower AST levels post-D-galactosamine challenge, with grafts surviving for 14 days.

Conclusions:

  • Encapsulated fetal and neonatal liver fragments can prevent liver dysfunction in a large animal model of hepatic failure.
  • This xenotransplantation strategy effectively mitigates immunological rejection, allowing for xenograft survival and therapeutic benefit.
  • Encapsulated xenotransplantation represents a promising approach for managing acute liver injury and as a bridge to organ allotransplantation.