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Pseudofracture: An Acute Peripheral Tissue Trauma Model
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Multicompartmental Trauma Induces Persistent Inflammation and Organ Injury.

Jennifer A Munley1, Lauren S Kelly1, Gwendolyn S Gillies1

  • 1Department of Surgery and Sepsis and Critical Illness Research Center, University of Florida, College of Medicine, Gainesville, Florida.

The Journal of Surgical Research
|October 7, 2023
PubMed
Summary
This summary is machine-generated.

Polytrauma in rats causes persistent systemic inflammation and organ dysfunction for at least one week. Female rats showed better kidney recovery than males, highlighting the need for long-term trauma model studies.

Keywords:
Multiorgan injuryPolytraumaTrauma

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Area of Science:

  • Trauma and Injury Research
  • Systemic Inflammation
  • Multiorgan Dysfunction

Background:

  • Previous models of multicompartmental injury focused on short durations (<72 hours).
  • Long-term effects of multicompartmental injury remain undefined.
  • This study investigates persistent inflammation and organ dysfunction post-polytrauma.

Purpose of the Study:

  • To establish and evaluate a preclinical model of multicompartmental injury.
  • To determine if systemic inflammation and multiorgan dysfunction persist at one week post-injury.
  • To compare long-term outcomes between male and female rats.

Main Methods:

  • Male and female Sprague-Dawley rats underwent polytrauma (PT) or served as naive controls.
  • Evaluated weight, hemoglobin, plasma neutrophil gelatinase-associated lipocalin (NGAL), and plasma toll-like receptor 4 (TLR4) at days 2 and 7.
  • Assessed lung injury histologically at day 7 and compared renal function between sexes.

Main Results:

  • PT rats exhibited significant weight loss and anemia persisting to day 7.
  • Elevated plasma NGAL and TLR4 were observed in PT rats at both time points.
  • Significant lung injury was evident at day 7 in PT rats, with males showing poorer renal function than females.

Conclusions:

  • Multicompartmental trauma induces sustained systemic inflammation and multiorgan dysfunction.
  • Renal recovery is improved in female rats compared to males.
  • Long-term assessment in preclinical models is vital for evaluating immunomodulatory therapies.