Clinical trial NCT02662101: Impact of Oxidized Silver Wound Dressings on Wound Bacteria
Official title: Molecular Microbial Ecology as a Diagnostic Tool to Identify Mode of Action and New Targets for Oxidized Silver Wound Dressings
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Wounds
Lead sponsor: Exciton Technologies Inc.
Sponsor class: INDUSTRY
First posted: 2016-01-25
Enrollment: 17
Sex: ALL
Minimum age (years): 17
Maximum age (years): 70
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: BASIC_SCIENCE

Brief summary: Chronic non-healing wounds considerably impact quality of life in affected patients and are a substantial burden on the Canadian health care system. Microbes colonizing a chronic wound play an important role in impeding effective healing. Chronic wounds are colonized by polymicrobial communities and no single organism can be seen as causal. Only a small fraction of wound bacteria are cultured by diagnostic tests and studies have shown little agreement between culture and molecular based approaches, therefore an effective diagnostic for wound microbes is required. It is know that the composition of the microbial community associated with a wound changes as it heals although the causal relationship is somewhat unclear. Although not very effective in treating chronic non-healing wounds, antibiotics are often administered, contributing to concerns of antibiotic resistance. The wound dressings produced by Exciton Technologies Inc. (ETI) effectively aid in the healing process in chronic wounds through unknown mechanisms. ETI's wound dressings contain a combination of silver salts with three different valence, +1, +2 and +3 that have antimicrobial activity and are effective in reducing biofilm formation in vitro. However, it is not known how these silver salts impact microbial ecology of the wound and the role this plays in wound healing. The objectives of this research are to develop a new diagnostic tool based on molecular characterization of wound sites so as to predict how to best treat wounds and to identify new microbes to be targeted by ETI's technology. This project will utilize molecular microbial ecology for the assessment and evaluation of topical silver interventions, gaining insight into the management of chronic infection. Substantiating the microbiota-modifying effectiveness of silver wound dressings towards increasing clinician and patient understanding to improving clinical outcomes.


Eligibility criteria: Inclusion Criteria:

1. Signed or verbal informed consent
2. \>17 yrs and \<70 yrs of age
3. have a chronic wound (defined as \>6 weeks, non-healing), with or without clinical signs of infection.
4. requires visitation or admittance to the clinic and subsequent visits for dressing changes

Exclusion Criteria:

1. Systemic antibiotics within the last 2 weeks.
2. known skin sensitivity to any of the dressing components
3. Poor prognosis and who are unlikely to survive the trial period.
4. Participating in another concurrent trial.
5. Exhibiting any other medical condition, which, according to the investigator, justifies the subject's exclusion from the trial.

Primary outcomes:
measure: Observe microbes in the wound
timeFrame: 4 weeks
Secondary outcomes:
measure: Observe wound progression
timeFrame: 4 weeks
Other outcomes:
Locations:
Study officials:
affiliation: Exciton Technologies
name: Lindsay Kalan, PhD
role: STUDY_CHAIR
References: