1
|
Ghanbari M, Salkovskiy Y, Carlson MA. The rat as an animal model in chronic wound research: An update. Life Sci 2024; 351:122783. [PMID: 38848945 DOI: 10.1016/j.lfs.2024.122783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/29/2024] [Accepted: 06/04/2024] [Indexed: 06/09/2024]
Abstract
The increasing global prevalence of chronic wounds underscores the growing importance of developing effective animal models for their study. This review offers a critical evaluation of the strengths and limitations of rat models frequently employed in chronic wound research and proposes potential improvements. It explores these models in the context of key comorbidities, including diabetes, venous and arterial insufficiency, pressure-induced blood flow obstruction, and infections. Additionally, the review examines important wound factors including age, sex, smoking, and the impact of anesthetic and analgesic drugs, acknowledging their substantial effects on research outcomes. A thorough understanding of these variables is crucial for refining animal models and can provide valuable insights for future research endeavors.
Collapse
Affiliation(s)
- Mahboubeh Ghanbari
- Department of Biomechanics, University of Nebraska at Omaha, Omaha, NE, USA.
| | - Yury Salkovskiy
- Department of Biomechanics, University of Nebraska at Omaha, Omaha, NE, USA.
| | - Mark A Carlson
- Department of Surgery, Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE, USA.
| |
Collapse
|
2
|
BaniHani H, Alnaeem MM, Saleh M, Nashwan AJ. Knowledge and practice of informal caregivers on pressure injury prevention and treatment among patients receiving palliative care. Int J Palliat Nurs 2024; 30:274-284. [PMID: 38913643 DOI: 10.12968/ijpn.2024.30.6.274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
BACKGROUND Pressure injuries (PIs) are prevalent in palliative care. Lack of knowledge and skills among informal caregivers on PI prevention and management contributes significantly to the occurance or deterioration of PIs. AIM The aims of this study were to: (1) determine the level of knowledge and practices of informal caregivers on PI prevention and treatment; (2) explore the socio-demographic characteristics of informal caregivers that influence PI prevention and treatment among patients who need palliative care. METHODS The quantitative cross-sectional descriptive design was used to collect data from 146 informal caregivers, and a valid and reliable questionnaire was used. RESULTS A total of 146 informal caregivers of patients with PI completed the study. Most participants had a relatively low level of PI prevention, treatment knowledge and practice. Participants who were older than 28 years, working for the government and married had significantly better knowledge and practice of PI prevention and treatment than other participants. CONCLUSION Information for informal caregivers in different settings about PI prevention and treatment is needed. Informal caregivers need to acquire more professional practices and knowledge to improve the quality of patient care.
Collapse
Affiliation(s)
| | | | - Mohammad Saleh
- Professor, Faculty of Nursing, University of Jordan, Amman, Jordan
| | - Abdulqadir J Nashwan
- Director of Nursing for Education and Practice Development, Hamad Medical Corporation, Doha, Qatar
| |
Collapse
|
3
|
Corona-Rodarte E, Cano-Aguilar LE, Baldassarri-Ortego LF, Tosti A, Asz-Sigall D. Pressure alopecias: A review. J Am Acad Dermatol 2024; 90:125-132. [PMID: 37454698 DOI: 10.1016/j.jaad.2023.07.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 06/02/2023] [Accepted: 07/06/2023] [Indexed: 07/18/2023]
Abstract
Pressure-induced alopecias (PAs) are an infrequent group of scarring and nonscarring alopecias that occur after ischemic obstruction of capillaries that leads to circumscribed areas of hair loss. Initially described after prolonged surgeries or immobilization, type 1 PA occurs after sustained external pressure to the skin, mainly the scalp prominences. Alopecia induced by cosmetic procedures, referred in this review as type 2 PA, is reported with increased frequency in literature and predominantly emerges from pressure exerted by the volume of injectables. It is important to differentiate type 2 PA from vascular occlusion-induced alopecia because they represent distinct entities. Clinically, PA may present with erythema, swelling, and tenderness; however, alopecia might be the sole manifestation. Crusts and ulceration are associated with a worse outcome and a higher risk of scarring alopecia. Prompt diagnosis is paramount to prevent complications. Trichoscopy, although considered nonspecific, may provide relevant clues for an accurate diagnosis. Hair regrows in most cases, but prognosis depends on ischemia severity and timely treatment with reperfusion therapies or mobilization. Treatment of hair loss is usually not necessary because the disease in most cases is self-limited and reversible. The role of topical minoxidil and corticosteroids remains unknown.
Collapse
Affiliation(s)
- Eduardo Corona-Rodarte
- Department of Dermatology, Instituto Dermatológico de Jalisco José Barba Rubio, Zapopan, Mexico.
| | | | | | - Antonella Tosti
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida
| | - Daniel Asz-Sigall
- Trichology Clinic, Department of Dermatology, Hospital General "Dr. Manuel Gea González," Mexico City, Mexico.
| |
Collapse
|
4
|
Nasir NJM, Heemskerk H, Jenkins J, Hamadee NH, Bunte R, Tucker-Kellogg L. Myoglobin-derived iron causes wound enlargement and impaired regeneration in pressure injuries of muscle. eLife 2023; 12:85633. [PMID: 37267120 DOI: 10.7554/elife.85633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 04/25/2023] [Indexed: 06/04/2023] Open
Abstract
The reasons for poor healing of pressure injuries are poorly understood. Vascular ulcers are worsened by extracellular release of hemoglobin, so we examined the impact of myoglobin (Mb) iron in murine muscle pressure injuries (mPI). Tests used Mb-knockout or treatment with deferoxamine iron chelator (DFO). Unlike acute injuries from cardiotoxin, mPI regenerated poorly with a lack of viable immune cells, persistence of dead tissue (necro-slough), and abnormal deposition of iron. However, Mb-knockout or DFO-treated mPI displayed a reversal of the pathology: decreased tissue death, decreased iron deposition, decrease in markers of oxidative damage, and higher numbers of intact immune cells. Subsequently, DFO treatment improved myofiber regeneration and morphology. We conclude that myoglobin iron contributes to tissue death in mPI. Remarkably, a large fraction of muscle death in untreated mPI occurred later than, and was preventable by, DFO treatment, even though treatment started 12 hr after pressure was removed. This demonstrates an opportunity for post-pressure prevention to salvage tissue viability.
Collapse
Affiliation(s)
- Nurul Jannah Mohamed Nasir
- Cancer & Stem Cell Biology, Duke-NUS Medical School, Singapore, Singapore
- Centre for Computational Biology, Duke-NUS Medical School, Singapore, Singapore
| | - Hans Heemskerk
- Cancer & Stem Cell Biology, Duke-NUS Medical School, Singapore, Singapore
- BioSyM and CAMP Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology, CREATE, Singapore, Singapore
| | - Julia Jenkins
- Cancer & Stem Cell Biology, Duke-NUS Medical School, Singapore, Singapore
| | | | - Ralph Bunte
- Cancer & Stem Cell Biology, Duke-NUS Medical School, Singapore, Singapore
| | - Lisa Tucker-Kellogg
- Cancer & Stem Cell Biology, Duke-NUS Medical School, Singapore, Singapore
- Centre for Computational Biology, Duke-NUS Medical School, Singapore, Singapore
- BioSyM and CAMP Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology, CREATE, Singapore, Singapore
| |
Collapse
|
5
|
A review of animal models from 2015 to 2020 for preclinical chronic wounds relevant to human health. J Tissue Viability 2021; 30:291-300. [PMID: 34103213 DOI: 10.1016/j.jtv.2021.05.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/30/2021] [Accepted: 05/26/2021] [Indexed: 01/22/2023]
Abstract
SIGNIFICANCE Chronic wounds fail to heal in a timely manner and exhibit sustained inflammation with slow tissue repair and remodelling. They decrease mobility and quality of life, and remain a major clinical challenge in the long-term care of many patients, affecting 6.5 million individuals annually in the U.S., decreasing mobility and quality of life. Treatment costs are a major burden on the U.S. healthcare system, totalling between $25 and $100 billion annually. Chronic wound severity depends upon several factors such as comorbidities, severity of tissue damage, infection and presence of necrosis and vary greatly in their healing mechanisms. In vivo animal models are critical for studying healing pathways of chronic wounds and seek to replicate clinical factors for trials of topical, systemic, and device-based therapeutics. This comprehensive review discusses murine, rat, lapine, canine, feline and porcine models of chronic wounds. RECENT ADVANCES Foundational chronic wound models for several species are discussed together with refinements and advances in the time period between 2015 and 2020 which have the potential for broad utility in investigating biological and device-based wound treatment therapies for human health. CRITICAL ISSUES Chronic wounds fail to heal in a timely manner and have differing aetiologies, rendering no single in vivo animal model universally applicable. FUTURE DIRECTIONS Further studies are required to develop clinically relevant chronic wound animal model which reflect the clinical reality of the various influences of age, disease, comorbidities and gender on delayed healing and enhance understanding of the biological processes of human wound healing.
Collapse
|
6
|
Kesarwani A, Nagpal PS, Chhabra H. Experimental animal modelling for pressure injury: A systematic review. J Clin Orthop Trauma 2021; 17:273-279. [PMID: 33987077 PMCID: PMC8082114 DOI: 10.1016/j.jcot.2021.04.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/23/2021] [Accepted: 04/02/2021] [Indexed: 01/02/2023] Open
Abstract
INTRODUCTION Pressure injury (PI) is a potentially serious condition that is often a consequence of other medical illnesses. It remains a challenge for the clinicians and the researcher to fully understand and develop a technique for comprehending pathogenicity, prevention and treatment. Several animal models have been created to understand the multifaceted cellular and biochemical processes of PI. There are numerous known intrinsic and extrinsic factors influencing the recovery of PI. Some of the important factors are friction, spinal cord injury, diabetes, nutrition, aging, infection, medication, obesity and vascular diseases. The dearth of optimal, pre-clinical animal models capable of mimicking the human PI remains a major challenge for its cure. An ideal animal model must endeavour the reproducibility, clinical significance, and most importantly effective translation into clinical use. METHODS In this current systematic review, a methodological literature review was conducted on the PRISMA guidelines. PubMed/Medline, Research Scholar and Science Direct databases were searched. We conferred the animal models like mice, rats, pigs and dogs used in the PI experiments between January 1980 to January 2021. Typically, methods like Ischemia-reperfusion (IR), monoplegia pressure sore and mechanical non-invasive have been discussed. These were used to generate pressure injuries in small and large animal models. RESULTS AND CONCLUSION Different animal models (mouse, rat, pig, dog) were evaluated based on ease of handling, availability for research, their size, skin type and the technical skills required. Studies suggest that mice and rats are the best-suited animals as their skin healing by contraction resembles the skin healing in humans. In most of the studies with mice and rats, the time taken for the recovery was between 1 and 3 weeks. Further, various techniques discussed in the current systematics review, supports the statement that the Ischemia-reperfusion (IR) method is the most suited method to study pressure injury. It is a controlled method that can develop different stages of PI and does not require any specialized setup for the application.
Collapse
Affiliation(s)
- Ashwani Kesarwani
- Department of Basic Research, Indian Spinal Injuries Centre, New Delhi, India
| | - Puja S. Nagpal
- Department of Basic Research, Indian Spinal Injuries Centre, New Delhi, India
| | - H.S. Chhabra
- Medical Director and Chief of Spine Unit, Indian Spinal Injuries Centre, New Delhi, India
| |
Collapse
|
7
|
Hariri A, Chen F, Moore C, Jokerst JV. Noninvasive staging of pressure ulcers using photoacoustic imaging. Wound Repair Regen 2019; 27:488-496. [PMID: 31301258 PMCID: PMC8043767 DOI: 10.1111/wrr.12751] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 06/30/2019] [Indexed: 01/07/2023]
Abstract
Ulcers including pressure ulcers and diabetic foot ulcers damage the skin and underlying tissue in people with compromised blood circulation. They are classified into four stages of severity and span from mild reddening of the skin to tissue damage and muscle/bone infections. Here, we used photoacoustic imaging as a noninvasive method for detecting early tissue damage that cannot be visually observed while also staging the disease using quantitative image analysis. We used a mouse model of pressure ulcers by implanting subdermal magnets in the dorsal flank and periodically applying an external magnet to the healed implant site. The magnet-induced pressure was applied in cycles, and the extent of ulceration was dictated by the number of cycles. We used both laser- and light-emitting diode (LED)-based photoacoustic imaging tools with 690 nm excitation to evaluate the change in photoacoustic signal and depth of injury. Using laser-based photoacoustic imaging system, we found a 4.4-fold increase in the photoacoustic intensity in stage I vs. baseline (no pressure). We also evaluated the depth of injury using photoacoustics. We measured a photoacoustic ulcer depth of 0.38 ± 0.09 mm, 0.74 ± 0.11 mm, 1.63 ± 0.4 mm, and 2.7 ± 0.31 mm (n = 4) for stages I-IV, respectively. The photoacoustic depth differences between each stage were significant (p < 0.05). We also used an LED-based photoacoustic imaging system to detect early stage (stage I) pressure ulcers and observed a 2.5-fold increase in photoacoustic signal. Importantly, we confirmed the capacity of this technique to detect dysregulated skin even before stage I ulcers have erupted. We also observed significant changes in photoacoustic intensity during healing suggesting that this approach can monitor therapy. These findings were confirmed with histology. These results suggest that this photoacoustic-based approach might have clinical value for monitoring skin diseases including pressure ulcers.
Collapse
Affiliation(s)
- Ali Hariri
- Department of NanoEngineering, University of California San Diego, La Jolla, California, 92093
| | - Fang Chen
- Department of NanoEngineering, University of California San Diego, La Jolla, California, 92093
- Material Science and Engineering Program, University of California San Diego, La Jolla, California, 92093
| | - Colman Moore
- Department of NanoEngineering, University of California San Diego, La Jolla, California, 92093
| | - Jesse V. Jokerst
- Department of NanoEngineering, University of California San Diego, La Jolla, California, 92093
- Material Science and Engineering Program, University of California San Diego, La Jolla, California, 92093
- Department of Radiology, University of California San Diego, La Jolla, California, 92093
| |
Collapse
|
8
|
Kumar S, Yarmush ML, Dash BC, Hsia HC, Berthiaume F. Impact of Complete Spinal Cord Injury on Healing of Skin Ulcers in Mouse Models. J Neurotrauma 2018; 35:815-824. [DOI: 10.1089/neu.2017.5405] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Suneel Kumar
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey
| | - Martin L. Yarmush
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey
- Center for Engineering in Medicine, Massachusetts General Hospital and Shriners Burns Hospital, Boston, Massachusetts
| | - Biraja C. Dash
- Department of Surgery, Yale School of Medicine, Yale University, New Haven, Connecticut
| | - Henry C. Hsia
- Department of Surgery, Yale School of Medicine, Yale University, New Haven, Connecticut
| | - Francois Berthiaume
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey
| |
Collapse
|
9
|
Opdenakker G, Van Damme J, Vranckx JJ. Immunomodulation as Rescue for Chronic Atonic Skin Wounds. Trends Immunol 2018; 39:341-354. [PMID: 29500031 DOI: 10.1016/j.it.2018.01.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 12/08/2017] [Accepted: 01/24/2018] [Indexed: 12/11/2022]
Abstract
Chronic skin wounds, caused by arterial or venous insufficiency or by physical pressure, constitute an increasing medical problem as populations age. Whereas typical wounds are characterized by local inflammation that participates in the healing process, atonic wounds lack inflammatory markers, such as neutrophil infiltration, and generally do not heal. Recently, prominent roles in the immunopathology of chronic wounds were attributed to dysregulations in specific cytokines, chemokines, matrix metalloproteinases (MMPs), and their substrates. Together with the complement system, these molecular players provide necessary defense against infections, initiate angiogenesis, and prepare tissue reconstitution. Here, we review the current state of the field and include the concept that, aside from surgery and stem cell therapy, healing may be enhanced by immunomodulating agents.
Collapse
Affiliation(s)
- Ghislain Opdenakker
- Laboratory of Immunobiology and Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium; The Glycobiology Institute, University of Oxford, Oxford, UK.
| | - Jo Van Damme
- Laboratory of Immunobiology and Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Jan Jeroen Vranckx
- Department of Development & Regeneration & Department of Plastic & Reconstructive Surgery, University Hospitals Leuven and KU Leuven, Leuven, Belgium
| |
Collapse
|