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Related Concept Videos

Kidney Transplant I: Introduction01:28

Kidney Transplant I: Introduction

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A kidney transplant is a surgical approach that involves replacing a non-functioning kidney with a healthy one from a donor. This procedure is often a treatment option for end-stage renal disease (ESRD) patients. The method requires careful recipient selection, including evaluating various medical and psychosocial factors. These criteria vary between transplant centers but generally include assessments of the patient's overall health, adherence to medical recommendations, and lifestyle...
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Kidney Transplant II: Surgical Procedure01:26

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Preoperative ManagementThe primary goals of preoperative management in kidney transplantation are to optimize the patient’s metabolic state and prepare them for surgery through diet adjustments, necessary dialysis, and tailored medical treatment. This phase also involves comprehensive infection screening and patient education about the surgical procedure and postoperative care to improve outcomes and adherence.Medical ManagementA comprehensive evaluation is required for both the living...
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Acute Kidney Injury II: Pathophysiology01:29

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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...
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Kidney Transplant III: Nursing Management01:16

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Postoperative Nursing Management for Kidney Transplant PatientsPostoperative nursing management care includes monitoring the surgical site, encouraging early movement, and promoting lung health through breathing exercises. Nurses also administer prescribed medications like H2-blockers, such as famotidine, or proton pump inhibitors, like omeprazole, to help prevent gastrointestinal ulcers and bleeding. Fungal infections in the mouth and bladder can result from immunosuppressive and antibiotic...
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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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Rationale for Targeting Complement to Mitigate Renal Transplant Ischemia-Reperfusion Injury.

Chrysanthos D Christou1, Fayyad Jaradat1, Jonathon Olsburgh1

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Journal of the American Society of Nephrology : JASN
|July 22, 2025
PubMed
Summary
This summary is machine-generated.

Kidney transplant ischemia-reperfusion injury (IRI) causes delayed graft function (DGF). Targeting local complement activation via machine perfusion or novel delivery systems offers promising strategies to prevent DGF and improve transplant outcomes.

Keywords:
clinical trialcomplementischemia-reperfusionkidney transplantation

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Area of Science:

  • Nephrology
  • Transplantation Immunology
  • Biomedical Engineering

Background:

  • Ischemia-reperfusion injury (IRI) is a primary cause of delayed graft function (DGF) in kidney transplantation, leading to poorer outcomes.
  • Local complement activation within renal tubules, particularly via the lectin and alternative pathways, significantly drives IRI and graft immunogenicity.
  • Systemic complement inhibition has shown limited success in clinical trials for DGF, suggesting a need for targeted therapeutic approaches.

Purpose of the Study:

  • To review the mechanisms of IRI in kidney transplantation, focusing on the role of complement activation in renal tubules.
  • To explore novel strategies for preventing IRI and DGF, emphasizing targeted delivery of therapeutics.
  • To discuss the potential of organ-targeted complement inhibition and xenotransplantation in improving kidney transplant success.

Main Methods:

  • Review of existing literature on IRI, DGF, complement pathways, and therapeutic interventions in kidney transplantation.
  • Analysis of the role of renal tubular complement synthesis and activation in IRI pathogenesis.
  • Evaluation of emerging strategies including machine perfusion, extracellular vesicles, nanoparticle carriers, and xenotransplantation.

Main Results:

  • The lectin pathway, initiated by collectin-11, is crucial for complement activation in hypoxic renal tubules during IRI.
  • Ineffective targeting of systemic complement inhibitors contributes to their limited clinical efficacy in preventing DGF.
  • Hypothermic machine perfusion has demonstrated improvements in DGF rates and early graft outcomes.
  • Targeted delivery systems and organ-targeted complement inhibition show promise for IRI prevention.
  • Engineered multigenic xenografts present a potential strategy to overcome complement-mediated barriers in transplantation.

Conclusions:

  • Targeting local complement activation within the kidney, rather than systemic inhibition, is critical for preventing IRI and DGF.
  • Machine perfusion and advanced targeted delivery systems offer effective means to deliver therapeutics directly to the injured kidney.
  • Future research directions include optimizing organ-targeted complement inhibition and exploring xenotransplantation as a viable alternative.