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Cell-mediated Immune Responses01:40

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Rat Burn Model to Study Full-Thickness Cutaneous Thermal Burn and Infection
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Published on: August 23, 2022

Decrease of circulating dendritic cells in burn patients.

A D'Arpa1, A Accardo-Palumbo, G Amato

  • 1Plastic Surgery and Burns Therapy Operating Unit, ARNAS, Civic Hospital, Palermo, Italy.

Annals of Burns and Fire Disasters
|October 13, 2011
PubMed
Summary
This summary is machine-generated.

Severe burn injury suppresses immune function, leading to sepsis. This study found that dendritic cell (DC) numbers decrease after burns, especially in septic patients, potentially causing immune suppression.

Keywords:
BURNCELLSCIRCULATINGDECREASEDENDRITICPATIENTS

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Area of Science:

  • Immunology
  • Sepsis Research
  • Burn Injury Complications

Background:

  • Burn injury often leads to immune suppression and increased risk of sepsis.
  • Key immune cells like T lymphocytes and natural killer cells show functional impairment post-burn.
  • Dendritic cells (DCs) are crucial for initiating immune responses against pathogens.

Purpose of the Study:

  • To investigate the levels of dendritic cells (DCs) in burn patients compared to healthy individuals.
  • To determine how DC percentages change over time after burn injury.
  • To assess the impact of sepsis on DC levels in burn patients.

Main Methods:

  • Utilized three-colour flow cytometry to analyze peripheral blood samples.
  • Quantified the percentage of lineage-negative LIN-DR+ dendritic cells (DCs).
  • Compared DC percentages in healthy subjects, nonseptic burn patients, and septic burn patients at various time points up to 14 days post-burn.

Main Results:

  • Dendritic cell (DC) percentages were significantly lower in septic burn patients compared to nonseptic patients and healthy controls throughout the 14-day observation period.
  • In nonseptic burn patients, DC percentages initially dropped, then gradually increased from day 3 to day 10 before returning to normal levels by day 14.
  • A notable decrease in DC percentage was observed early after burn injury, persisting longer in the presence of severe sepsis.

Conclusions:

  • Early reduction in dendritic cell (DC) percentage occurs following burn injury.
  • Severe sepsis exacerbates this DC reduction, maintaining low levels for at least 14 days.
  • The observed decrease in DCs may be a contributing factor to the immunosuppression seen after severe burn injuries.