Lead nephrotoxicity and associated disorders: biochemical mechanisms

Area of Science:

• Nephrology
• Toxicology
• Biochemistry

Background:

• Lead exposure poses significant risks to multiple organ systems, with kidney toxicity being particularly insidious.
• Lead nephropathy manifests acutely with proximal tubular dysfunction (Fanconi-type syndrome) and chronically with irreversible damage, including fibrosis, tubular changes, glomerulonephritis, and renal failure.

Purpose of the Study:

• To review the biochemical mechanisms underlying lead-induced kidney damage.
• To elucidate the pathways leading to acute and chronic nephropathy, renal neoplasms, saturnine gout, and hypertension.

Main Methods:

• This review synthesizes existing literature on the biochemical effects of lead on renal systems.
• It examines intracellular lead interactions, effects on cellular structures, and disruption of key metabolic and regulatory pathways.

Main Results:

• Lead induces proximal tubular dysfunction, mitochondrial alterations, and inclusion body formation.
• Chronic exposure leads to irreversible interstitial fibrosis, tubular atrophy/hyperplasia, glomerulonephritis, and renal failure.
• Lead is implicated in renal neoplasms, saturnine gout, and hypertension through interactions with membranes, enzymes, and the renin-angiotensin system.

Conclusions:

• Lead's biochemical interactions disrupt critical kidney functions, including energy production, calcium metabolism, and ion transport.
• These disruptions underlie the pathogenesis of various lead-induced renal disorders, from acute dysfunction to chronic failure and cancer.