Biofilm Modified Macrophage Phenotype and Function in Diabetic Wound Healing
Study Details
Study Description
Brief Summary
The purpose of this study is to learn more about biofilm and to see how it affects diabetic wounds. A biofilm can occur if a chronic infection causes bacteria to grow in a slime enclosed group. This grouping of bacteria is called a biofilm.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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Detailed Description
There is one study visit with a 14-week follow-up that will take place during the participants standard of care visit at the Indiana University Health Comprehensive Wound Center (CWC). The following procedures will take place once your appointment has been completed:
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Informed consent will be signed (if not previously signed)
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A hemoglobin A1c drawn will be taken by research personnel, if one has not been done within the last 90 days to check your average blood sugar level.
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An Ankle Brachial Index (ABI) will be obtained if the participant has a leg wound. This is to ensure that participants have adequate blood flow to your wound. This is a non-invasive test which measures blood pressure in both of the participants arms and ankles.
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Demographics (such as your name and address and phone number, age), medical history, current medications, current standard of care labs, and wound data (measurements, cause of the wound, wound culture, assessments, treatments, and duration) will be recorded. The participant's medical record number will also be recorded.
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A photo of the wound site will be taken.
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Wound Vac Collection - The wound vac sponge will be collected (waste by product of the therapy) by the research staff.
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An optional two 3 mm punch tissue biopsies will be obtained from the participant's provider. To perform the biopsy, the area surrounding the wound will first be numbed using a local anesthetic agent that will be injected at the wound site. Then, a pencil-like instrument will be used to remove a small, thin cylinder of tissue. Each biopsy is about the size of this dot. After the tissue is removed, a sterile gauze will be placed on the area to stop any minor bleeding that may occur. The biopsies will be looked at in the laboratory to look at the microorganisms. You will not receive the results of the completed laboratory analysis. (Note: If two biopsies cannot be obtained per your physician's discretion, only one biopsy, debridement tissue (dead tissue that is removed from your wound) or no tissue will be obtained, and/or culture swabs (your wound will be swabbed with something like a Q-tip to collect cells to test for bacteria or other organisms in the wound) will be collected to test for infection.)
During the 14-week follow-up visit, research staff will review the participant's medical chart to determine the final status of the wound. If the participant does not return to the CWC at 14 weeks, the last CWC visit will be documented as the wound check follow-up. This does not require the participant to return for an extra study visit. This information will only be collected from their medical chart if available:
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Final status of the wound (healing, not healing, healed)
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Wound data (measurements), treatments, and any standard of care labs will be obtained
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A photo of your wound from the medical chart will be obtained (if available)
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Diabetic patients infected ulcers Diabetic patients with HbA1c<9 with who have wound 4weeks or longer with infection with following interventions: Finger prick test for HbA1c measurement Punch biopsy VAC sponge collection Ankle brachial index |
Diagnostic Test: Finger prick test for HbA1c measurement
HbA1c measurement with finger prick method
Procedure: Punch Biopsy
Wound site will be anaesthetized, by punch biopsy tissue will be collected, wound site will be monitored for bleeding(if bleeding Cautery will be used to stop bleeding).
Other: Vac Sponge Collection
NPWT sponge which is discarded as biological waste, will be collected for wound macrophage isolation
Other: Ankle Brachial Index
Blood pressure test
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| Diabetic patients non infected Ulcers Diabetic patients with HbA1c<9 who have wound 4 weeks or longer without infection with following interventions: Finger prick test for HbA1c measurement Punch biopsy VAC sponge collection Ankle brachial index |
Diagnostic Test: Finger prick test for HbA1c measurement
HbA1c measurement with finger prick method
Procedure: Punch Biopsy
Wound site will be anaesthetized, by punch biopsy tissue will be collected, wound site will be monitored for bleeding(if bleeding Cautery will be used to stop bleeding).
Other: Vac Sponge Collection
NPWT sponge which is discarded as biological waste, will be collected for wound macrophage isolation
Other: Ankle Brachial Index
Blood pressure test
|
Outcome Measures
Primary Outcome Measures
- Biofilm infection [14 Weeks]
Biofilm Infection using SEM and RT PCR analysis
- macrophage phenotyping [14 Weeks]
Wound macrophage phenotypes using flowcytometry, RTPCR and RNA Seq
Eligibility Criteria
Criteria
Inclusion Criteria:
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Age 18 and above years old
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Willing and able to provide informed consent
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Willing and able to comply with protocol instructions, including biopsies and study visits
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Diabetics with an open wound
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Receiving Negative Wound Pressure Therapy (NPWT)
Exclusion Criteria:
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Inadequate arterial supply, as evidenced by any of the following (for wounds below the knee):
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TcOM < 30mmHg
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ABI < 0.7
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TBI < 0.6
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Women who are pregnant
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | IU Health Methodist Hospital | Indianapolis | Indiana | United States | 46202 |
Sponsors and Collaborators
- Indiana University
Investigators
- Principal Investigator: Sashwati Roy, PhD, Indiana University
Study Documents (Full-Text)
None provided.More Information
Publications
- Breen JD, Karchmer AW. Staphylococcus aureus infections in diabetic patients. Infect Dis Clin North Am. 1995 Mar;9(1):11-24. Review.
- Davis SC, Martinez L, Kirsner R. The diabetic foot: the importance of biofilms and wound bed preparation. Curr Diab Rep. 2006 Dec;6(6):439-45. Review.
- Hanke ML, Angle A, Kielian T. MyD88-dependent signaling influences fibrosis and alternative macrophage activation during Staphylococcus aureus biofilm infection. PLoS One. 2012;7(8):e42476. doi: 10.1371/journal.pone.0042476. Epub 2012 Aug 3.
- Hanke ML, Heim CE, Angle A, Sanderson SD, Kielian T. Targeting macrophage activation for the prevention and treatment of Staphylococcus aureus biofilm infections. J Immunol. 2013 Mar 1;190(5):2159-68. doi: 10.4049/jimmunol.1202348. Epub 2013 Jan 30. Erratum in: J Immunol. 2013 Jun 15;190(12):6709-10.
- James GA, Swogger E, Wolcott R, Pulcini Ed, Secor P, Sestrich J, Costerton JW, Stewart PS. Biofilms in chronic wounds. Wound Repair Regen. 2008 Jan-Feb;16(1):37-44. Epub 2007 Dec 13.
- Neut D, Tijdens-Creusen EJ, Bulstra SK, van der Mei HC, Busscher HJ. Biofilms in chronic diabetic foot ulcers--a study of 2 cases. Acta Orthop. 2011 Jun;82(3):383-5. doi: 10.3109/17453674.2011.581265. Epub 2011 May 11.
- Zhao G, Usui ML, Lippman SI, James GA, Stewart PS, Fleckman P, Olerud JE. Biofilms and Inflammation in Chronic Wounds. Adv Wound Care (New Rochelle). 2013 Sep;2(7):389-399. Review.
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