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Ischemic Tissue Injury in the Dorsal Skinfold Chamber of the Mouse: A Skin Flap Model to Investigate Acute Persistent Ischemia
Published on: November 17, 2014
Gender-specific ischemic tissue tolerance in critically perfused skin.
Yves Harder1, Michaela Amon, Reto Wettstein
1Institute for Clinical and Experimental Surgery, University of Saarland, Homburg, Saarland, Germany. yvesharder@bluewin.ch
Langenbeck'S Archives of Surgery
|October 24, 2009
Summary
Female gender and age increase susceptibility to ischemic tissue necrosis. This heightened risk in females stems from reduced tissue tolerance, not impaired microvascular function.
Area of Science:
- Vascular biology
- Tissue engineering
- Ischemia research
Background:
- Ischemic tissue necrosis is a critical concern in various medical conditions.
- Understanding gender-specific differences in tissue response to ischemia is crucial for targeted therapies.
Purpose of the Study:
- To investigate gender-specific disparities in the development of necrosis within persistent ischemic tissue.
- To determine if these differences are attributable to gender-specific vascular reactivity or altered ischemic tolerance.
Main Methods:
- Hairless mice of both genders across adolescent, adult, and senescent ages were utilized.
- Critical ischemia was induced by transecting ear pedicles, with microcirculation assessed over 5 days.
- Intravital epifluorescence microscopy was employed to analyze tissue necrosis, blood flow, functional capillary density (FCD), red blood cell (RBC) velocity, and capillary diameter.
Main Results:
- Adult and senescent females exhibited significantly higher rates of necrosis compared to age-matched males.
- Adolescent animals showed no significant gender-specific difference in flap necrosis.
- Microcirculatory parameters including FCD, RBC velocity, and capillary dilatory response were comparable between genders, indicating no gender-specific microvascular dysfunction.
Conclusions:
- Both advanced age and female gender are identified as predisposing factors for increased susceptibility to ischemic tissue necrosis.
- The heightened necrosis observed in female animals is linked to a reduced tolerance of ischemic tissue, rather than exacerbated microvascular dysfunction.
