Objectives: The effect of topical vascular endothelial growth factor (VEGF) on post-surgical tracheal healing using various reconstruction materials was studied, with particular regard to prevention of granulation tissue or fibrosis.
Methods: Twenty-four New Zealand White rabbits underwent survival surgery using autograft patches (n=6), xenopericardium patches (n=6), intraluminal Palmaz wire stents (n=6), and controls (n=6). Autograft and pericardial half-patches were soaked in topical VEGF (5 microg/ml over 30 min) and saline before reimplantation. Stents and controls received circumferential injections of VEGF and saline in the tracheal wall. At 1-4 months postoperatively, specimens of sacrificed animals were stained with anti-VEGF antibody, followed by morphological and immunohistochemical examination.
Results: Rabbits with autografts and controls fared well until planned sacrifice. After xenopericardium repair, obstructive intraluminal granulation tissue led to early sacrifice in three rabbits. Stent insertion led to earlier death from airway obstruction in all six rabbits. Topical VEGF reduced granulation tissue after pericardial repair and fibrosis in all repairs except in stents. Remarkably, VEGF-pretreated half-patches and saline half-patches stained similarly high for VEGF, suggesting also local production of VEGF, probably in plasmacells, and in submucosal glands.
Conclusions: Autograft repair induces the least granulation tissue and fibrosis, and the best healing pattern. Stents rapidly induced critical airway obstruction, unhindered by VEGF, leading to premature death. Tracheal pretreatment with topical VEGF reduces postoperative fibrosis after autograft and pericardial patch repairs, and reduces granulation tissue after xenopericardium repair. In time, VEGF is probably locally produced, although its potential role in tracheal healing remains to be established.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s1010-7940(02)00722-4 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Epidermal stem cell derived exosomes-induced dedifferentiation of myofibroblasts inhibits scarring via the miR-203a-3p/PIK3CA axis.
J Nanobiotechnology
January 2025
Department of Burns, Wound Repair and Reconstruction, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, 510080, China.
Hypertrophic scar (HS) is a common fibroproliferative disorders with no fully effective treatments. The conversion of fibroblasts to myofibroblasts is known to play a critical role in HS formation, making it essential to identify molecules that promote myofibroblast dedifferentiation and to elucidate their underlying mechanisms. In this study, we used comparative transcriptomics and single-cell sequencing to identify key molecules and pathways that mediate fibrosis and myofibroblast transdifferentiation.
View Article and Find Full Text PDFAP39, a novel mitochondria-targeted hydrogen sulfide donor, promotes cutaneous wound healing in an in vivo murine model of acute frostbite injury.
Biomed Pharmacother
January 2025
Department of Surgery, Division of Urology, London Health Sciences Center, Western University, London, Ontario, Canada; Matthew Mailing Center for Translational Transplant Studies, London Health Sciences Center, Western University, London, Ontario, Canada; Multi-Organ Transplant Program, London Health Sciences Center, Western University, London, Ontario, Canada; Department of Microbiology & Immunology, Schulich School of Medicine & Dentistry, University of Western Ontario, London, Ontario, Canada. Electronic address:
Frostbite injury refers to cold tissue injury which typically affects the peripheral areas of the body, and is associated with limb loss and high rates of morbidity. Historically, treatment options have been limited to supportive care, leading to suboptimal outcomes for affected patients. The pathophysiology of frostbite injury has been understood in recent years to share similarity with that of cold ischemia-reperfusion injury as seen in solid organ transplantation, of which mitochondria play an important contributing role.
View Article and Find Full Text PDFIntussusception of Meckel's Diverticulum: A Case Report.
Cureus
December 2024
Colorectal Surgery, Blackpool Teaching Hospitals, Blackpool, GBR.
Meckel's diverticulum (MD) is a common congenital anomaly of the gastrointestinal tract, present in approximately 2% of the population. While typically asymptomatic, MD can lead to complications such as obstruction and intussusception. Here, we present a case report of a man presenting with abdominal pain with an incidental finding of MD complicated by intussusception and our management approach.
View Article and Find Full Text PDFBiodegradable Temporizing Matrix in Postoncological Scalp Reconstruction: A Case Series.
Plast Reconstr Surg Glob Open
January 2025
From the Department of Plastic Surgery, Hull University Teaching Hospitals, East Riding of Yorkshire, United Kingdom.
Biodegradable temporizing matrix (BTM) is a synthetic biodegradable dermal matrix that helps develop a non-skin graft amenable wound bed (eg, over tendon or bone) into a graftable wound bed, by acting as an inert scaffold for angiogenesis and formation of granulation tissue. There is currently a paucity of evidence to encourage its use in scalp defects following skin malignancy excision. This retrospective analysis aimed to evaluate the utility of BTM in this patient subset.
View Article and Find Full Text PDFDevelopment of a bio-inspired wound model for debridement training.
In Vitro Model
June 2024
Department of Pharmacy, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH UK.
Unlabelled: Wound debridement is commonplace in expediting wound healing in the clinic. Despite this, there are limited resources available for simulation training for practitioners prior to facing real-life patients. Typically, citrus peels or porcine skin are employed in a vain attempt to improve debridement proficiency, yet these fail to provide a realistic experience of the textures and consistencies of wounds.
View Article and Find Full Text PDFWant 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!