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Mechanisms Regulating Wound Vascularization

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00737321
Recruitment Status : Unknown
Verified July 2017 by Gayle Gordillo, Ohio State University.
Recruitment status was:  Active, not recruiting
First Posted : August 19, 2008
Last Update Posted : July 24, 2017
Information provided by (Responsible Party):
Gayle Gordillo, Ohio State University

Brief Summary:
This pilot study is designed to assess the impact of ischemia/ diminished wound vascularization and stress on wound healing by comparing patterns of gene expression in specific cell types critical to wound healing biology, e.g. macrophages or endothelial cells.

Condition or disease Intervention/treatment
Wounds and Injuries Procedure: Samples will be collected

Detailed Description:
Chronic wounds affect approximately 2% of the U.S. population at any given time. Animal models can not simulate the complex set of pre-existing conditions in each individual that results in failed wound healing. Therefore, human subjects must be used to obtain valid data. Adequate wound vascularization that permits blood vessels to deliver oxygen to the wound is a requirement for wound healing to occur. This protocol will attempt to gain greater understanding of the mechanisms of chronic wounds through 3 specific aims: 1) identify the angiogenic mechanisms in wound site macrophages, which are required for healing, 2) determine the impact of stress and glucocorticoid resistance on endothelial cell and macrophage biology and ultimately wound healing outcomes, 3) identify patterns of gene expression in wound endothelial cells that are found in healing versus non-healing wounds. This data will be correlated with the wound oxygenation status to determine the impact of wound vascularization on the observed biological responses.

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Study Type : Observational
Estimated Enrollment : 80 participants
Observational Model: Case-Only
Time Perspective: Prospective
Official Title: Mechanisms Regulating Wound Vascularization
Study Start Date : August 2008
Estimated Primary Completion Date : December 2017
Estimated Study Completion Date : December 2017

Resource links provided by the National Library of Medicine

Group/Cohort Intervention/treatment
2- Diabetics without wound (s)
These group of subject will be control arm, included who have good glycemic control diabetic with HbA1c 8.4 or lower and also without any open wounds. Samples will be collected.
Procedure: Samples will be collected
wound tissue biopsy, blood samples, saliva collection and wound VAC sponge (if applicable).

1-Subjects with diabetes with wound
This group of subjects will have wound and come for couple of follow up visits for saliva collection, biopsy collection and blood draw.

Primary Outcome Measures :
  1. Changes in Gene Expression Profile in Healing versus Non-healing Wounds [ Time Frame: 12 weeks ]
    Wound tissue biopsies, saliva, serum samples and wound sponges will be obtained at an initial time point, at the midpoint of the study and near the end of wound closure over a 12 week window. If the wound closes quickly, i.e. less than 4 weeks then only 2 biopsies will be obtained.

Biospecimen Retention:   Samples With DNA
All participnts with wounds will have 3 mm punch biopsy performed twice or three times in the whole study period.Obtained tissue sample will be processed immidiately and frozen in liquid nitrogen.The tissue sample will transport to research lab for genomic analysis.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 69 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Patients (n=80)including controlled group will be recruited from the OSU outpatient wound care center located at Morehouse plaza and OSU East, OSU plastic surgery, OSU diabetic clinics.

Inclusion Criteria:

  • Age 18-69 years
  • ischemic wound group
  • non-ischemic wound group
  • diabetes with good glycemic control
  • lower extremity wound

Exclusion Criteria:

  • Age greater ≥ 70 years
  • End stage renal disease
  • Unable to provide informed consent
  • Pregnant women
  • Therapeutically anticoagulated
  • Prisoners
  • Periwound TcOM < 25mmHg
  • Spinal cord injury
  • Taking immunosuppressive medications
  • Individuals with current diagnosis of a major psychiatric illness (e.g.schizophrenia,psychosis)
  • Severe protein malnutrition- pre-albumin < 10 mg/dl or albumin < 2 g/dl
  • Diabetes with poor glucose control-defined as hgb A1c > 8.4%

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00737321

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United States, Ohio
OSU East Wound Care Center
Columbus, Ohio, United States, 43205
OSU Comprehensive Wound Care Center Morehouse
Columbus, Ohio, United States, 43221
Sponsors and Collaborators
Gayle Gordillo
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Principal Investigator: Gayle Gordillo, MD Ohio State University
Publications of Results:
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Responsible Party: Gayle Gordillo, Professor, Ohio State University Identifier: NCT00737321    
Other Study ID Numbers: 2008H0051
First Posted: August 19, 2008    Key Record Dates
Last Update Posted: July 24, 2017
Last Verified: July 2017
Keywords provided by Gayle Gordillo, Ohio State University:
Impact of ischemia
Impact of stress and
Identify patterns of gene expression
Additional relevant MeSH terms:
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Neovascularization, Pathologic
Wounds and Injuries
Pathologic Processes