Small bowel tissue high-energy phosphate alterations during hypothermic storage using different protecting solutions

Area of Science:

• Organ transplantation
• Biochemistry
• Surgical preservation

Background:

• Posttransplant graft function is critical for successful organ transplantation.
• Graft energy status post-storage directly impacts long-term viability.
• Optimizing preservation solutions is essential to maintain cellular energy levels.

Purpose of the Study:

• To evaluate high-energy phosphate levels in rat small bowels after cold storage.
• To compare the efficacy of different preservation solutions: Euro-Collins, Bretschneider's HTK, and a modified UW solution.
• To determine the impact of storage solutions on graft viability through energy status assessment.

Main Methods:

• Rat small bowel segments were subjected to 21 hours of simple ischemic cold storage at 4°C.
• Segments were flushed intravascularly and intraluminally with one of three preservation solutions.
• High-performance liquid chromatography (HPLC) was used to quantify high-energy phosphates at specified intervals.

Main Results:

• Euro-Collins solution demonstrated superior preservation of small bowel graft viability.
• Grafts stored in Euro-Collins solution maintained significantly higher levels of high-energy phosphates.
• Elevated adenosine triphosphate (ATP) levels were attributed to enhanced anaerobic glycolysis, supported by high glucose content in Euro-Collins solution.

Conclusions:

• Euro-Collins solution is the most effective among the tested solutions for preserving rat small bowel viability during 21-hour cold storage.
• Maintaining high-energy phosphate levels, particularly ATP, is crucial for post-ischemic graft function.
• The high glucose concentration in Euro-Collins solution facilitates anaerobic glycolysis, contributing to better energy status preservation.