Pressure ulcers (PUs) are serious skin injuries whereby the wound healing process is frequently stalled in the inflammatory phase. Myeloid-derived suppressor cells (MDSCs) accumulate as a result of inflammation and promote cutaneous wound healing by mechanisms that are not fully understood. Recently, MDSCs have been shown to differentiate into fibrocytes, which serve as emerging effector cells that enhance cell proliferation in wound healing. We postulate that in wound healing MDSCs not only execute their immunosuppressive function to regulate inflammation but also stimulate cell proliferation once they differentiate into fibrocytes. In the current study, by using full-thickness and PU mouse models, we found that Kruppel-like factor 4 (KLF4) deficiency resulted in decreased accumulation of MDSCs and fibrocytes, and wound healing was significantly delayed. Conversely, KLF4 activation by the plant-derived product Mexicanin I increased the number of MDSCs and fibrocytes and accelerated the wound healing. Collectively, our study revealed a previously unreported function of MDSCs in cutaneous wound healing and identified Mexicanin I as a potential agent to accelerate PU wound healing.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4402119 | PMC |
| http://dx.doi.org/10.1038/jid.2015.3 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Nomogram-based Approach for Predicting Complication Risks Following Prepectoral Direct-to-Implant Breast Reconstruction.
Plast Reconstr Surg
December 2024
Department of Plastic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, South Korea.
Background: Despite the recent steep rise in the use of prepectoral direct-to-implant (DTI) breast reconstruction, concerns remain regarding the potentially risk of complications, resulting in the selective application of the technique; however, the selection process was empirically based on the operator's decision. Using patient and operation-related factors, this study aimed to develop a nomogram for predicting postoperative complications following prepectoral DTI reconstruction.
Methods: Between August 2019 and March 2023, immediate prepectoral DTI was performed for all patients deemed suitable for one-stage implant-based reconstruction.
A Conjugated Oligomer with Drug Efflux Pump Inhibition and Photodynamic Therapy for Synergistically Combating Resistant Bacteria.
ACS Appl Mater Interfaces
January 2025
Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Normal University, Xi'an 710119, P. R. China.
High expression of drug efflux pump makes antibiotics ineffective against bacteria, leading to drug-resistant strains and even the emergence of "superbugs". Herein, we design and synthesize a dual functional o-nitrobenzene (NB)-modified conjugated oligo-polyfluorene vinylene (OPFV) photosensitizer, OPFV-NB, which can depress efflux pump activity and also possesses photodynamic therapy (PDT) for synergistically overcoming drug-resistant bacteria. Upon light irradiation, the OPFV-NB can produce aldehyde active groups to covalently bind outer membrane proteins, such as tolerant colicin (TolC), blocking drug efflux of bacteria.
View Article and Find Full Text PDFApplication of clinician support tools to improve wound healing outcomes and simplify treatment selection for effective exudate management.
Wounds
December 2024
Smith+Nephew, Watford, Hertfordshire, UK.
Background: Achievement of moisture balance can be a critical factor affecting time to closure of nonhealing wounds, and dry wounds can take much longer to heal than those with high exudate levels. Whether the goal of management is to donate moisture to the wound or control excessive fluid until the cause has been identified and addressed, choice of dressing and other wound management products can affect nursing resources, clinical outcomes, concordance, and quality of life for the patient.
Case Reports: The cases discussed illustrate differences in management approaches for dry and wet wounds and show how clinician support tools (eg, tissue type, infection/inflammation, moisture imbalance, epithelial edge advancement [TIME] clinical decision support tool) can facilitate treatment decisions.
Bromelain-based enzymatic debridement: mechanism of action in the wound environment. A literature review.
Wounds
December 2024
MediWound, Ltd, Yavne, Israel.
Background: Chronic hard-to-heal wounds, such as diabetic foot ulcers, venous leg ulcers, and pressure ulcers, present significant safety concerns, patient burdens, and challenges to health care systems globally.
Objective: To review the mechanism of action and clinical function of bromelain-based enzymatic debridement (BBD) in the context of wound care, focusing on the mechanism of action of BBD and its formulation for chronic wounds in particular.
Methods: A literature review was conducted to assess both bromelain's mechanism of action as well as clinical and preclinical studies on the use of BBD, searching the PubMed and Google Scholar databases for articles published between November 1992 and July 2024.
Effect of introduction of elastic compression bandages on quality of life in patients with lower extremity vascular skin ulcers: a prospective study correlating WOUND-Q patient-reported outcome measures and evidence-based medicine.
Wounds
December 2024
Department of Plastic, Reconstructive and Aesthetic Surgery, Campus Bio-Medico University Hospital, Rome, Italy.
Background: Evidence-based medicine and patient-reported outcome measures (PROMs) are helpful tools in the wound care field, but few studies correlating quality of life (QoL) changes with objective changes exist.
Objective: To investigate the QoL changes following the shift from primary dressings alone to elastic compression bandages in patients with a new diagnosis of vascular skin ulcer, and to evaluate a possible correlation between objective and subjective changes.
Materials And Methods: This study included 122 patients with a new diagnosis of vascular skin ulcer, who had previously used only primary dressings alone.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!