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Related Concept Videos

Acute Kidney Injury I: Introduction01:22

Acute Kidney Injury I: Introduction

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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...
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Acute Kidney Injury II: Pathophysiology01:29

Acute Kidney Injury II: Pathophysiology

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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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Acute Kidney Injury III: Clinical Manifestations01:29

Acute Kidney Injury III: Clinical Manifestations

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

Acute Kidney Injury V: Interprofessional Care

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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...
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Acute Kidney Injury IV: Diagnostic Studies and Prevention01:30

Acute Kidney Injury IV: Diagnostic Studies and Prevention

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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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Nephrons01:10

Nephrons

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The kidneys are intricate organs with millions of working units known as nephrons. Each nephron features two major structures: the renal corpuscle, which facilitates blood plasma filtration, and the renal tubule, which handles the glomerular filtrate. Blood supply is directly linked to the nephrons. The renal corpuscle consists of the glomerulus, a capillary network, and the Bowman's capsule, a double-walled epithelial structure that encases the glomerulus. The filtering of blood plasma...
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Modeling Hypoxia/Reoxygenation Injury in Proximal Tubular Epithelial Cells
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Sepsis-associated AKI: epithelial cell dysfunction.

David R Emlet1, Andrew D Shaw2, John A Kellum1

  • 1Center for Critical Care Nephrology, University of Pittsburgh, Pittsburgh, PA; Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA.

Seminars in Nephrology
|March 22, 2015
PubMed
Summary
This summary is machine-generated.

Sepsis-induced acute kidney injury (AKI) in critically ill patients has high mortality. This review explores how renal tubule epithelial cell (RTEC) dysfunction contributes to sepsis-AKI, impacting patient outcomes and kidney health.

Keywords:
DAMPs and PAMPsSepsisacute kidney injuryrenal tubule epithelial cell

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Area of Science:

  • Nephrology
  • Critical Care Medicine
  • Immunology

Background:

  • Sepsis-induced acute kidney injury (AKI) is a common and lethal complication in critically ill patients.
  • AKI in sepsis survivors often leads to chronic kidney disease, highlighting the need for effective therapies.
  • Current therapeutic strategies for sepsis-AKI are limited, necessitating a deeper understanding of its underlying mechanisms.

Purpose of the Study:

  • To elucidate the cellular and molecular etiologies of sepsis-induced AKI.
  • To review the multifaceted origins of AKI, including inflammatory and immune responses, microvascular dysfunction, and metabolic alterations.
  • To discuss the critical role of renal tubule epithelial cells (RTECs) in the pathogenesis of sepsis-AKI.

Main Methods:

  • Literature review of cellular and molecular mechanisms of sepsis-induced AKI.
  • Analysis of current hypotheses regarding RTEC dysfunction in sepsis-AKI.
  • Synthesis of data on damage-associated molecular patterns (DAMPs), pathogen-associated molecular patterns (PAMPs), and immune activation in AKI.

Main Results:

  • Sepsis-AKI involves complex interactions including DAMPs, PAMPs, inflammation, immune activation, and microvascular disturbances.
  • Oxidative stress, bioenergetic alterations, and cell-cycle dysregulation significantly impact RTECs.
  • Cellular de-differentiation and re-differentiation processes in RTECs are key determinants of kidney injury and recovery.

Conclusions:

  • Renal tubule epithelial cells (RTECs) are central effectors in sepsis-induced AKI, mediating diverse cellular insults.
  • Understanding RTEC fate determination is crucial for developing novel therapeutic interventions for sepsis-AKI.
  • Further research into RTEC responses to sepsis is essential for improving patient survival and long-term kidney function.