Cellular stress responses and molecular mechanisms of nephrotoxicity

Bob van de Water1, Marjo de Graauw, Sylvia Le Dévédec

  • 1Division of Toxicology, Leiden/Amsterdam Center for Drug Research, Leiden University, Leiden, The Netherlands. water_b@chem.leidenuniv.nl

Toxicology Letters
|December 20, 2005
PubMed

Insights

Understanding molecular mechanisms of acute kidney injury is key to developing new therapies. This review explores gene/protein expression, cellular changes, and stress proteins in renal cell repair.

Area of Science:

  • Nephrology
  • Molecular Biology
  • Cellular Biology

Background:

  • Acute kidney injury (AKI) necessitates understanding molecular and cellular pathways for therapeutic development.
  • Genomic and proteomic techniques identify numerous genes and proteins related to renal toxicity.
  • Defining the precise roles of these molecules in cellular toxicity is crucial for understanding renal injury and repair.

Purpose of the Study:

  • To review the relationship between altered gene/protein expression and cellular perturbations in renal toxicity.
  • To elucidate the role of signal transduction pathways in the mechanisms of renal cell injury.
  • To highlight the function of stress response proteins in the regeneration of injured renal cells.

Main Methods:

  • Literature review focusing on molecular and cellular mechanisms of acute renal pathologies.
  • Analysis of genomic and proteomic data related to renal toxicity.
  • Examination of studies on cellular perturbations, signal transduction, and stress response proteins in renal cells.

Main Results:

  • Changes in gene and protein expression are linked to cellular perturbations and toxicity.
  • Signal transduction pathways play a significant role in renal cell injury.
  • Stress response proteins are implicated in the repair of damaged renal cells.

Conclusions:

  • Enhanced knowledge of molecular mechanisms in AKI can lead to novel therapeutic strategies.
  • Identifying the functional roles of genes and proteins is essential for targeted interventions.
  • Stress response proteins represent a promising area for promoting renal regeneration and preventing failure.

Related Concept Videos

Drug Toxicity: Dose-Dependent Reactions01:24

Drug Toxicity: Dose-Dependent Reactions

Drug toxicities can be stratified into pharmacological, pathological, or genotoxic based on their mechanisms. The incidence and severity of these toxicities generally increase with the drug's concentration in the body and exposure time.Pharmacological toxicity is evident when the therapeutic effects of drugs overshoot into adverse reactions in a predictable, dose-dependent manner. Central nervous system (CNS) depression from barbiturates is a classic example, with effects escalating from...
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...
Other Stress Responses in Bacteria01:30

Other Stress Responses in Bacteria

Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
Cellular Injury I: Introduction01:00

Cellular Injury I: Introduction

Cellular injury occurs when a cell cannot maintain homeostasis or adapt to stressors such as hypoxia, toxins, or trauma. Depending on severity and duration, injury may be reversible, allowing recovery, or irreversible, leading to cell death.General Mechanisms of Cell InjuryAlthough causes vary, most cellular injuries arise from a few key mechanisms that disrupt essential functions and often amplify one another. Cell survival depends on the extent and balance of these disturbances.ATP depletion...
Cellular Injury IV: Necrosis01:16

Cellular Injury IV: Necrosis

Necrosis is a form of irreversible cell death caused by severe injury such as ischemia, toxins, or trauma. Unlike programmed cell death, it is an uncontrolled, pathological process that typically provokes inflammation in surrounding tissues.Pathophysiologic ChangesNecrosis begins when cells sustain critical damage, leading to swelling of organelles, particularly mitochondria, and rapid ATP depletion. As energy levels decline, membrane ion pumps fail, leading to calcium influx and eventually,...
Diabetic Nephropathy01:28

Diabetic Nephropathy

Definition Diabetic nephropathy is a chronic kidney complication that results from prolonged hyperglycemia.Prevalence It is the most common cause of chronic kidney disease (CKD) and end-stage renal disease (ESRD) worldwide, affecting up to half of individuals with diabetes.Pathophysiology • Sustained hyperglycemia triggers multiple hemodynamic and metabolic changes in the kidney. • Early in the disease, increased renal blood flow and glomerular hyperfiltration occur due to afferent arteriolar...