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Plast Reconstr Surg Glob Open. 2015 Apr 7;3(3):e334. doi: 10.1097/GOX.0000000000000260. eCollection 2015 Mar.

Characterization of a Murine Pressure Ulcer Model to Assess Efficacy of Adipose-derived Stromal Cells.

Author information

1
Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, La.; Division of Plastic and Reconstructive Surgery, Department of Surgery, University of Florida, Gainesville, Fla.; Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Olsztyn, Poland; Department of Pharmacology, Tulane University School of Medicine, New Orleans, La.; LaCell LLC, New Orleans, La.; Department of Medicine, Tulane Health Sciences Center, New Orleans, La.; and Department of Surgery, Tulane Health Sciences Center, New Orleans, La.

Abstract

BACKGROUND:

As the world's population lives longer, the number of individuals at risk for pressure ulcers will increase considerably in the coming decades. In developed countries, up to 18% of nursing home residents suffer from pressure ulcers and the resulting hospital costs can account for up to 4% of a nation's health care budget. Although full-thickness surgical skin wounds have been used as a model, preclinical rodent studies have demonstrated that repeated cycles of ischemia and reperfusion created by exposure to magnets most closely mimic the human pressure ulcer condition.

METHODS:

This study uses in vivo and in vitro quantitative parameters to characterize the temporal kinetics and histology of pressure ulcers in young, female C57BL/6 mice exposed to 2 or 3 ischemia-reperfusion cycles. This pressure ulcer model was validated further in studies examining the efficacy of adipose-derived stromal/stem cell administration.

RESULTS:

Optimal results were obtained with the 2-cycle model based on the wound size, histology, and gene expression profile of representative angiogenic and reparative messenger RNAs. When treated with adipose-derived stromal/stem cells, pressure ulcer wounds displayed a dose-dependent and significant acceleration in wound closure rates and improved tissue histology.

CONCLUSION:

These findings document the utility of this simplified preclinical model for the evaluation of novel tissue engineering and medical approaches to treat pressure ulcers in humans.

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