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Quantifying Single Microvessel Permeability in Isolated Blood-perfused Rat Lung Preparation
Published on: June 30, 2014
Raffinose improves 24-hour lung preservation in low potassium dextran glucose solution: a histologic and
S Fischer1, D Hopkinson, M Liu
1Department of Pathology, Hospital for Sick Children, University Health Network, Toronto, Ontario, Canada.
The Annals of Thoracic Surgery
|April 20, 2001
Summary
Adding raffinose to lung preservation solution significantly reduces cell death and edema, improving lung graft quality. This cytoprotective effect enhances lung function after storage.
Area of Science:
- Organ transplantation research
- Preservation solution development
- Pulmonary medicine
Background:
- Low potassium dextran (LPD) preservation solution with raffinose improves rat lung function after 24-hour storage.
- The exact mechanisms of raffinose's protective effects remain unclear.
Purpose of the Study:
- To investigate the histologic and ultrastructural changes in rat lungs preserved with raffinose-supplemented LPD.
- To correlate these changes with improved pulmonary function.
Main Methods:
- Rat lungs were preserved using LPD or LPD with 30 mmol/L raffinose for 24 hours at 4°C.
- Control lungs were not stored.
- Edema, cell death (via trypan blue), and tissue ultrastructure (light and electron microscopy) were assessed.
Main Results:
- Raffinose-LPD lungs showed significantly less weight gain (edema) and fewer dead cells compared to LPD-only lungs.
- LPD preservation led to significant cellular necrosis, edema, and capillary injury.
- Raffinose-LPD lungs exhibited only minimal edema and cellular damage.
Conclusions:
- Raffinose provides a cytoprotective effect on pulmonary grafts during preservation.
- This protection explains the improved lung function observed previously.
- Supplementing LPD with raffinose may enhance clinical lung preservation.
