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Hypercalcaemia and pancreatic ultrastructure in cats.
T W Frick1, M A Spycher, P U Heitz
1Department of Surgery, University of Minnesota Hospitals, Minneapolis.
Summary
High calcium levels (hypercalcaemia) can cause acute pancreatitis in cats. This study observed acinar cell destruction following both local and systemic calcium infusions in feline models.
Area of Science:
- Veterinary Pathology
- Gastroenterology
- Cell Biology
Background:
- Hypercalcaemia is a potential etiological factor in pancreatitis.
- Understanding the pancreatic ultrastructural changes associated with hypercalcaemia is crucial for diagnosis and treatment.
Purpose of the Study:
- To investigate the effects of local and systemic calcium infusions on pancreatic ultrastructure in cats.
- To determine if hypercalcaemia can induce acute pancreatitis at a cellular level.
Main Methods:
- A controlled study involving three groups of cats receiving local splenic artery infusions (calcium gluconate, potassium chloride, or saline) for three hours.
- Two groups of cats received systemic jugular vein infusions (calcium gluconate or saline) for twelve hours, with adjusted calcium infusion rates to maintain hypercalcaemia.
Main Results:
- Local calcium infusion led to acinar cell destruction, nuclear hydropic degeneration, and organelle discharge without capillary damage.
- Systemic calcium infusion increased serum ionized calcium, caused Golgi apparatus overstimulation, disrupted acinar cell polarization, and resulted in nuclear chromatin clumping and acinar cell destruction.
Conclusions:
- Acute pancreatitis in cats can be induced by the stimulation and subsequent destruction of pancreatic acinar cells due to hypercalcaemia.
- Both local and systemic hypercalcaemia can precipitate pancreatic injury, highlighting the importance of calcium regulation.