Cellular and Molecular Mechanisms of AKI

Anupam Agarwal1, Zheng Dong2, Raymond Harris3

  • 1Division of Nephrology, and Nephrology Research and Training Center, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; Agarwal@uab.edu.

Insights

This review examines acute kidney injury (AKI) mechanisms, emphasizing epithelial cell damage and interactions. Improved animal models and clinical trial designs are crucial for developing effective AKI treatments.

Area of Science:

  • Nephrology
  • Cellular Biology
  • Molecular Medicine

Background:

  • Acute kidney injury (AKI) involves complex cellular and molecular processes, particularly affecting kidney epithelial cells.
  • Ischemic AKI serves as a key model for studying these mechanisms and cell-cell interactions.

Purpose of the Study:

  • To review current evidence on cellular and molecular mechanisms of AKI.
  • To assess the clinical relevance of targets investigated in experimental AKI models.
  • To identify improvements needed for AKI animal models and translational clinical trials.

Main Methods:

  • Review of existing scientific literature on AKI.
  • Analysis of cellular and molecular pathobiology in ischemic AKI models.
  • Evaluation of preclinical models and translational strategies for AKI therapeutics.

Main Results:

  • Epithelial cell pathobiology and cell-cell interactions are central to AKI.
  • Current experimental models require enhancement for better clinical translation.
  • Comorbidities like diabetes, aging, obesity, cancer, and CKD significantly impact AKI susceptibility.

Conclusions:

  • Development of context-specific animal models is essential for human AKI research.
  • Harmonization between academia and industry is needed for effective preclinical testing.
  • Optimized translational clinical trial design is critical for AKI intervention development.

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...
1.8K
Acute Kidney Injury I: Introduction01:22

Acute Kidney Injury I: Introduction

Introduction:Acute Kidney Injury (AKI) describes a swift decrease in kidney function occurring over hours to days, characterized by the kidneys' failure to remove waste products from the bloodstream. This leads to dangerous complications like metabolic acidosis, fluid overload, and electrolyte imbalances, such as hyperkalemia, which can cause life-threatening arrhythmias. AKI is common in both hospital and outpatient settings, often triggered by dehydration, sepsis, or exposure to nephrotoxic...
1.2K
Acute Kidney Injury IV: Diagnostic Studies and Prevention01:30

Acute Kidney Injury IV: Diagnostic Studies and Prevention

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...
469
Acute Kidney Injury V: Interprofessional Care01:20

Acute Kidney Injury V: Interprofessional Care

Acute Kidney Injury (AKI) requires a collaborative healthcare approach to restore renal function and prevent complications. Essential management strategies involve monitoring fluid and electrolyte balance, adjusting medications, initiating dialysis when necessary, and providing nutritional support.Fluid and Electrolyte ManagementFluid Monitoring: Regularly monitoring body weight, central venous pressure, and urine output helps detect fluid imbalances early. Patient intake and output are...
455
Acute Kidney Injury III: Clinical Manifestations01:29

Acute Kidney Injury III: Clinical Manifestations

Acute Kidney Injury (AKI) progresses through distinct clinical phases: the oliguric, diuretic, and recovery phases, each marked by unique manifestations and challenges.Oliguric Phase:The oliguric phase is the initial stage of AKI, typically lasting 10 to 14 days. This phase is marked by a significant reduction in urine output, usually less than 400 mL per day, indicating decreased kidney function. Fluid retention is a prominent feature, leading to symptoms such as edema, hypertension, and...
1.4K
Acute Kidney Injury VI: Nursing Management01:22

Acute Kidney Injury VI: Nursing Management

Acute Kidney Injury (AKI) results in an inability to maintain fluid, electrolyte, and acid-base balance. Effective nursing management is critical in improving patient outcomes and includes comprehensive patient assessment and targeted interventions.Comprehensive Patient AssessmentA detailed history collection is essential, focusing on any recent infections, nephrotoxic medication use, or chronic conditions such as hypertension and diabetes that may contribute to AKI. During the physical...
663