Background: More than 100,000 people each year are admitted to U.S. hospitals for severe burn injury. Strikingly, ethanol use prior to injury is apparent in nearly 50% of burn patients, rendering them six times more likely to die from infection than patients not exposed to ethanol. We previously reported that the kinetics and magnitude of neutrophil chemokine production and subsequent accumulation of neutrophils in the lung was dramatically altered when ethanol exposure preceded injury. Here, we tested whether burn injury and ethanol exposure combined, altered susceptibility to infection, neutrophil chemoattractant production, and neutrophil accumulation at the site of the burn wound.
Methods: Male B(6)D(2)F1 mice were administered a dose of ethanol designed to achieve 90-100 mg/dl circulating levels and 30 min later subjected to a 15% total body surface area dorsal scald injury. Susceptibility to topically applied Pseudomonas aeruginosa was examined. At various times after injury, burn wound and normal tissues were collected for assessments of neutrophil counts, myeloperoxidase quantitation, and neutrophil chemoattractant (KC and MIP-2) production.
Results: Ethanol exposure prior to burn injury enhanced susceptibility to infection after burn and was associated with significantly elevated production of KC, but not MIP-2, at the wound site. Despite the enhanced elevation of KC, neutrophil accumulation in the wounds of ethanol exposed, burn injured mice did not differ from those that received burn injury alone. TNFalpha (a potent activator of neutrophils), however, was found to be significantly elevated in the wounds of mice that received only burn injury, but not in those that received injury in combination with prior ethanol exposure.
Conclusion: In the presence of ethanol, neutrophils are adequately recruited to the site of burn injury, but their host defense functions are impaired, perhaps due to the lack of proinflammatory cytokines such as TNFalpha.
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http://dx.doi.org/10.1097/01.ALC.0000075833.92139.35 | DOI Listing |
Open Access Emerg Med
December 2024
Department of Emergency Medicine, Northwell, New Hyde Park, NY, USA.
Purpose: We describe emergency medical services (EMS) protocols for pain management in the United States to elucidate systemic variability in protocols. We describe types of pain medications included in protocols, routes of administration, indications for use, standing orders for dosing, and use in pediatric patients.
Methods: We performed a review of all publicly accessible EMS protocols from the website http://www.
Cureus
December 2024
Department of Dermatology, College of Medicine, Qassim University, Qassim, SAU.
Background: Excessive sun exposure is a significant risk factor for various skin conditions, including sunburn, premature aging, and skin cancer. This study aimed to assess the awareness, attitudes, and practices regarding sun exposure and sunscreen use among college students in Saudi Arabia.
Methodology: A cross-sectional study was conducted with 388 college students from various disciplines.
J Med Case Rep
December 2024
Shiraz Organ Transplant Center,, Abu Ali Sina Hospital, Shiraz University of Medical Sciences, Shiraz, Iran.
Background: Corrosive substance ingestion is rare but can cause severe injury, especially to the upper gastrointestinal tract, and can be a potentially fatal event. Various surgical procedures have been advocated for gastroesophageal reconstruction, but especially those using the right colon, when the ileocecal valve is preserved for gastric reconstruction, are briefly exposed in literature and have not been studied in humans by controlled studies. Using the right colon is believed to be beneficial because of the anti-reflux mechanism of the ileocecal valve.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Nano Drug Delivery Systems (NDDS), Cancer Biology Division, Rajiv Gandhi Centre for Biotechnology, Thycaud P.O, Poojappura, Thiruvananthapuram, Kerala 695014, India. Electronic address:
Severe burns pose significant threats to patient well-being, characterized by pain, inflammation, bacterial infection, and extended recovery periods. While exosome-loaded hydrogels have demonstrated considerable promise in wound healing, current formulations often fall short of achieving optimal therapeutic efficacy for burn wounds due to challenges related to their adaptability to wound shape and limited anti-bacterial capabilities. In this study a novel exosome laden sprayable thermosensitive polysaccharide-based hydrogel (ADA-aPF127@LL18/Exo) comprising alginate dialdehyde (ADA) and aminated Pluronic F127 (aPF127) was fabricated via Schiff base reaction.
View Article and Find Full Text PDFColloids Surf B Biointerfaces
December 2024
Institute of Burn Research, Southwest Hospital, State Key Lab of Trauma, Burn and Combined Injury, Army Medical University, Chongqing 400038, China. Electronic address:
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