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Related Experiment Videos

Diabetic hyperglycemia: a facilitating factor in systemic capillary leak.

Stephen Lawson1, David T Ward, Chance Conner

  • 1Department of Surgery, Walter Reed Army Medical Center, Washington, DC 20307, USA.

The Journal of Surgical Research
|July 18, 2002
PubMed
Summary

Diabetes exacerbates injury from mesenteric ischemia-reperfusion. Diabetic rats showed increased intestinal damage and capillary leak, indicating altered neutrophil activity contributes to injury severity.

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Area of Science:

  • Gastroenterology
  • Trauma Surgery
  • Endocrinology

Background:

  • Diabetes mellitus is a significant risk factor for poor outcomes after trauma.
  • Mesenteric ischemia-reperfusion (I/R) injury is a critical surgical complication.
  • Understanding diabetes's impact on I/R is vital for patient management.

Purpose of the Study:

  • To investigate the effects of diabetes on local intestinal and systemic injury following mesenteric I/R in a rat model.
  • To compare injury severity in diabetic, acutely hyperglycemic, and euglycemic rats.

Main Methods:

  • Diabetes was induced in rats using streptozotocin; acute hyperglycemia was induced via glucose infusion.
  • Rats underwent superior mesenteric artery occlusion for 10 or 30 minutes, followed by 1 or 4 hours of reperfusion.

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  • Intestinal injury, neutrophil infiltration, capillary leak, and neutrophil priming state were assessed.

    • Main Results:

    • Diabetic rats exhibited significant intestinal injury and capillary leak even after 10 minutes of ischemia.
    • Acutely hyperglycemic rats showed injury after 30 minutes of ischemia, similar to euglycemic rats but with faster onset of capillary leak.
    • Increased neutrophil priming state correlated with enhanced injury and leak in diabetic and hyperglycemic conditions.

    Conclusions:

    • Diabetes significantly increases susceptibility to mesenteric I/R injury.
    • Altered neutrophil activity plays a key role in the heightened local and systemic injury observed in diabetic individuals.
    • These findings highlight the critical need to manage glycemic control in diabetic trauma patients.