system
Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: BACKGROUND, METHODS, RESULTS. Meshes: Acidosis, Adenosine, Allopurinol, Animals, Cells, Cultured, Cold Temperature, Glutathione, Hydrogen-Ion Concentration, Insulin, Ion Transport, Linear Models, Liver, Liver Transplantation, Male, Organ Preservation, Organ Preservation Solutions, Raffinose, Rats, Rats, Sprague-Dawley.
user
Is hepatocellular defence against acidosis preserved after cold storage? Context: Primary non-function of liver allografts is related to preservation time, during which hypoxia leads to intracellular accumulation of acid. Preservation-induced failure of hepatocellular pH regulation may play a role in the pathogenesis of primary graft non-function. Using cultured/suspended rat hepatocytes and fluorimetric determination of intracellular pH, we determined whether preservation in University of Wisconsin solution (4 degrees C) impairs hepatocellular defence mechanisms against acidosis. In non-preserved, 24-h-preserved and 48-h-preserved hepatocytes acidified to pH 6.7-6.8, initial Na+/H+ antiport-mediated H+ fluxes averaged 12 +/- 5, 9 +/- 5 and 12 +/- 5 nmol microL-1 min-1 and initial Na+/HCO3- symport-mediated HCO3- fluxes 7 +/- 2, 7 +/- 3 and 6 +/- 2 nmol microL-1 min respectively (P = NS). Preservation did not affect the inverse relationship between Na+/H+ antiport activity and intracellular pH. Thus, hepatocellular defence against intracellular acidosis is maintained during up to 48 h in University of Wisconsin solution.
assistant
Altered pHi homeostasis is unlikely to play a role in the pathogenesis of primary non-function of liver allografts. Final Decision: yes