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Related Concept Videos

Acute Kidney Injury II: Pathophysiology01:29

Acute Kidney Injury II: Pathophysiology

Acute kidney injury (AKI) causes are categorized into three primary categories based on the location of the injury: prerenal, intrarenal (or intrinsic), and postrenal causes. This classification guides clinical management and illustrates how different pathways can impair kidney function.Etiology and Pathophysiology of Acute Kidney Injury1. Prerenal causesEtiology: Prerenal Acute Kidney Injury, the most common type, occurs when reduced blood flow to the kidneys decreases filtration capacity...
Acute Kidney Injury IV: Diagnostic Studies and Prevention01:30

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Accurate diagnosis and effective prevention are critical in managing Acute Kidney Injury (AKI), which is linked to high mortality rates ranging from 10% to 80%. Timely recognition of at-risk patients and careful monitoring can significantly reduce the likelihood of kidney damage.Diagnostic Assessments:The diagnostic process starts with a comprehensive medical history to identify prerenal, intrarenal, and postrenal causes.Prerenal causes, such as dehydration, hypotension, or blood loss, should...

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Brain Death and Cold Storage Induce Renal Inflammation and Injury in an Experimental Model.

Naiane do Nascimento Gonçalves1, Gabriele Preti1, Ludimila Leite Marzochi1

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Brain death and cold storage cause kidney inflammation that worsens over time. Organ preservation is an active injury phase, not a pause, with specific inflammatory patterns to target for improved transplant outcomes.

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Area of Science:

  • Nephrology
  • Transplantation Immunology
  • Organ Preservation

Background:

  • Brain death (BD) and cold storage (CS) critically impact donor kidney quality and transplant success.
  • The precise timing and molecular details of inflammation during organ preservation are not well understood.
  • This study examines inflammatory and histopathological changes in donor kidneys after BD and CS.

Purpose of the Study:

  • To investigate the temporal inflammatory and histopathological evolution of donor kidneys following brain death and cold storage.
  • To define the molecular specificity of inflammatory activation during organ preservation.
  • To identify potential therapeutic targets for mitigating preservation-associated injury.

Main Methods:

  • Utilized an experimental rat model with sham, BD, and BD followed by 12 or 24 hours of CS groups.
  • Assessed hemodynamic parameters, serum creatinine, inflammatory gene expression, and histopathology.
  • Enabled paired analysis of contralateral kidneys stored for varying durations.

Main Results:

  • BD caused hemodynamic instability and early renal dysfunction with elevated inflammatory mediators.
  • Cold storage maintained elevated Toll-like receptor 4, CASP1, IL-1β, and TNF-α, with progressive IL-6 increase.
  • Histopathology revealed progressive renal injury, including tubular and glomerular damage, and acute tubular necrosis with longer CS duration.

Conclusions:

  • Inflammation induced by brain death persists throughout cold storage, indicating active injury during preservation.
  • Distinct temporal inflammatory profiles emerge during preservation, highlighting specific molecular pathways.
  • Targeting these pathways could mitigate preservation-associated kidney injury and improve transplant outcomes.