Eryptosis in lead-exposed workers.

Area of Science:

• Toxicology
• Hematology
• Cell Biology

Background:

• Eryptosis is the physiological removal of aged or damaged erythrocytes.
• Lead exposure is known to induce eryptosis in erythrocytes.
• Understanding the mechanisms of lead-induced eryptosis is crucial for managing lead intoxication.

Purpose of the Study:

• To investigate the levels of eryptosis in lead-exposed workers.
• To explore the potential role of oxidative stress in lead-induced eryptosis.
• To identify molecular pathways involved in lead intoxication-related eryptosis.

Main Methods:

• Blood samples were collected from lead-exposed and non-exposed male workers.
• Assays were performed to measure δ-aminolevulinic acid dehydratase (δALAD) activity, thiobarbituric acid-reactive substance (TBARS) concentration, and reduced/oxidized glutathione (GSH/GSSG) ratio.
• Intracellular free calcium concentration ([Ca(2+)]i), μ-calpain activity, adenosine triphosphate (ATP) concentration, and phosphatidylserine (PS) externalization were analyzed.

Main Results:

• Lead-exposed workers showed significantly reduced δALAD activity and increased TBARS concentration, indicating oxidative stress.
• A lower GSH/GSSG ratio and higher [Ca(2+)]i and μ-calpain activity were observed in lead-exposed erythrocytes.
• Significant phosphatidylserine externalization was detected in lead-exposed workers, a marker of eryptosis.

Conclusions:

• Lead intoxication in workers induces eryptosis.
• The mechanism involves oxidative stress, reduced glutathione, increased intracellular calcium, and μ-calpain activation.
• Further research is needed to understand the physiopathology and chronic complications of lead-induced eryptosis.