Cited by 275Wound Healing and TreatmentsBacterial biofilms and quorum sensingDiabetic Foot Ulcer Assessment and Management

Delayed wound healing in diabetic (db/db) mice with Pseudomonas aeruginosa biofilm challenge: a model for the study of chronic wounds: A biofilm-challenged chronic wound model

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Zhao, Ge, Hochwalt, Phillip C., Usui, Marcia L., Underwood, Robert A., Singh, Pradeep K., James, Garth A., Stewart, Philip S., Fleckman, Philip +1 more·2010·Wound Repair and Regeneration

Abstract

Chronic wounds are a major clinical problem that lead to considerable morbidity and mortality. We hypothesized that an important factor in the failure of chronic wounds to heal was the presence of microbial biofilm resistant to antibiotics and protected from host defenses. A major difficulty in studying chronic wounds is the absence of suitable animal models. The goal of this study was to create a reproducible chronic wound model in diabetic mice by the application of bacterial biofilm. Six-millimeter punch biopsy wounds were created on the dorsal surface of diabetic (db/db) mice, subsequently challenged with Pseudomonas aeruginosa (PAO1) biofilms 2 days postwounding, and covered with semiocclusive dressings for 2 weeks. Most of the control wounds were epithelialized by 28 days postwounding. In contrast, none of biofilm-challenged wounds were closed. Histological analysis showed extensive inflammatory cell infiltration, tissue necrosis, and epidermal hyperplasia adjacent to challenged wounds-all indicators of an inflammatory nonhealing wound. Quantitative cultures and transmission electron microscopy demonstrated that the majority of bacteria were in the scab above the wound bed rather than in the wound tissue. The model was reproducible, allowed localized cutaneous wound infections without high mortality, and demonstrated delayed wound healing following a biofilm challenge. This model may provide an approach to study the role of microbial biofilms in chronic wounds as well as the effect of specific biofilm therapy on wound healing.

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  1. [20]Dorland's illustrated medical dictionary 2007 Saunders Philadelphia, PA

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Authors
Zhao, G., Hochwalt, P. C., Usui, M. L., Underwood, R. A., Singh, P. K., James, G. A., Stewart, P. S., Fleckman, P., & Olerud, J. E.
Affiliations
  • University of Washington (US)
  • Montana State University (US)
Corresponding author
Zhao, Ge
Venue
Wound Repair and Regeneration
Publisher
Wiley
Published
2010-08-19
Volume
18
Issue
5
Pages
467-477
ISSN
1067-1927 (ISSN-L)
OpenAlex
W1577305427
Cited by
275
References
39
Citations by year
2026: 13 · 2025: 11 · 2024: 24 · 2023: 28 · 2022: 22 · 2021: 18 · 2020: 23 · 2019: 20 · 2018: 16 · 2017: 12 · 2016: 20 · 2015: 13 · 2014: 14 · 2013: 20 · 2012: 14
FWCI
12.96
Type
journal article
Language
en
Open access
Locations
  • Wound Repair and Regeneration (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Montana State University ScholarWorks (Montana State University) (submittedVersion)
Funders
  • National Institutes of Health
  • National Institute of General Medical Sciences (P20GM078445)
Topics
  • Health Sciences › Medicine › Rehabilitation › Wound Healing and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bacterial biofilms and quorum sensing
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetic Foot Ulcer Assessment and Management
Keywords
chronic wounds, delayed wound healing, Pseudomonas aeruginosa biofilm, diabetic wound healing
MeSH terms
Animals, Chronic Disease, Diabetes Mellitus, Experimental, Female, Follow-Up Studies, Pilot Projects, Pseudomonas aeruginosa, Pseudomonas Infections, Time Factors, Wound Healing, Wound Infection, Biofilms, Mice

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