Cadmium, lead and mercury concentrations in pathologically altered human kidneys

Area of Science:

• Nephrology
• Toxicology
• Environmental Health

Background:

• Heavy metals (cadmium, lead, mercury) are known nephrotoxic agents.
• Kidney tissue, particularly the renal cortex, is susceptible to heavy metal damage.
• Understanding metal accumulation in kidneys is crucial for patient health and transplant outcomes.

Purpose of the Study:

• To quantify cadmium (Cd), lead (Pb), and mercury (Hg) concentrations in human kidneys.
• To investigate metal levels in kidneys with various lesions and in rejected kidney transplants.
• To determine the influence of biological and environmental factors on heavy metal accumulation in renal tissue.

Main Methods:

• Analysis of heavy metal concentrations (Cd, Pb, Hg) in renal cortex and medulla.
• Comparison of metal levels in kidneys with neoplastic changes, without tumors, and in transplanted kidneys.
• Statistical analysis to identify correlations between metal concentrations and factors like sex, age, and smoking status.

Main Results:

• Overall metal concentration order: Cadmium > Lead > Mercury.
• Highest Cd and Hg concentrations were in the renal cortex; highest Pb was in the medulla.
• Kidney grafts had lower Pb and Hg concentrations compared to cancerous kidneys; sex and age influenced Pb levels.

Conclusions:

• Renal grafts accumulate fewer heavy metals than cancerous kidneys, potentially due to immunosuppressive therapy.
• Sex, age, and smoking are significant factors influencing heavy metal concentrations in the kidneys.
• The distribution of heavy metals varies between renal cortex and medulla.