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Hypoxia-inducible Factor-1 (HIF-1) Regulated Circulating Angiogenic Cells (CACs) Recruitment in Burn Wound Healing

Burns Clinical Trial

Official title:
HIF-1 Regulated Circulating Angiogenic Cell Recruitment in Burn Wound Healing

Clinical Trial Summary

This research is being done to increase knowledge about wound healing and different factors that may affect healing in burn patients.

Clinical Trial Description

Burn injuries represent a major public health problem, requiring medical attention for more than one million Americans annually. Despite therapeutic advances, non-healing burn wounds and excessive scarring still result in significant long term physical and psychosocial morbidity. In this study we propose to perform clinical and research to study the role of circulating angiogenic cells (CAC) in promoting burn wound healing.

CAC's have been shown to contribute to vascularization and tissue repair in a number of animal models of tissue injury ischemia and mobilization of CACs into the peripheral blood has been demonstrated in burn wound patients.

We hypothesize that primary healing of burn wounds is dependent on repair of damaged vasculature, and that bone marrow derived stem cells, circulating angiogenic cells (CAC), play a critical role in the healing process. Furthermore we propose that the transcription factor Hypoxia Inducible Factor 1 alpha (HIF 1 alpha) through production of peptide products of its downstream target genes directs the "homing" of CAC's to the wound where they participate in healing events. The first aim of this study is to correlate mobilization of CAC's into the blood stream with the success of burn wound healing.

CAC's have been shown to contribute to vascularization and tissue repair in a number of studies. The relationship between mobilization of CAC's and burn wound healing has not been examined. In addition to surveying CAC numbers in the peripheral blood, we will assay levels of the putative mediators of CAC mobilization: Vascular Endothelial Growth Factor (VEGF), Placenta Growth Factor (PLGF), and Stromal Cell-Derived Factor (SDF-1). We hypothesize that individuals who are able to mount a large and sustained mobilization of CAC's into the peripheral blood from the bone marrow, will be more likely to heal the injured vasculature and go on to primary healing. Individuals with an inadequate mobilization of CAC's will fail to repair the damaged vasculature in the wound and proceed to necrosis and "conversion" to third degree, necrotic burn wounds. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT00796627
Study type Interventional
Source Johns Hopkins University
Contact
Status Terminated
Phase N/A
Start date December 2006
Completion date April 2014
View Details
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