Electron microscopic and 31-P NMR studies of ischemic injured rat livers during preservation and reflow.
Exp Toxicol Pathol
; 44(5): 245-53, 1992 Sep.
Article
en En
| MEDLINE
| ID: mdl-1446161
ABSTRACT
Ischemic injury induced during preservation and reperfusion contributes to post-operative failure in liver transplantation. Hepatic injury and recovery from preservation was studied in an isolated rat liver model reperfused with oxygenated erythrocytes. In order to correlate morphological and functional findings, 31-P nuclear magnetic resonance spectroscopy and electron microscopy were used to investigate metabolic and ultrastructural changes during 6 hours of reperfusion. Following cold preservation, EM's showed a primary sinusoidal cell injury, whereas the hepatocytes were well maintained. During reperfusion, hepatocytes displayed further damage. The simultaneous presence of vacuolarly degenerated mitochondria and mitochondria of increased activity was noted. 31-P NMP spectra demonstrated initially a partial ATP-recovery. The maximum level of 60% of the control ATP-value could not be further increased. EM and 31-P NMR indicate that the progressive injury to the liver is due to microcirculatory malfunction induced by an endothelial cell damage, followed by injured hepatocytes themselves, and the consequent intracellular energy crisis that is produced.
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Banco de datos:
MEDLINE
Asunto principal:
Preservación de Órganos
/
Reperfusión
/
Daño por Reperfusión
/
Metabolismo Energético
/
Hígado
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Año:
1992
Tipo del documento:
Article