Gestational and lactational lead intoxication produces alterations in the hepatic system of rat pups

Area of Science:

• Toxicology
• Developmental Biology
• Hepatology

Background:

• Lead (Pb) exposure during critical developmental periods, such as pregnancy and lactation, poses significant health risks.
• The hepatic system is a primary target for toxicant metabolism and detoxification, making it vulnerable to disruption.
• Understanding the impact of gestational and lactational lead exposure on neonatal liver function is crucial for public health.

Purpose of the Study:

• To investigate the effects of maternal lead exposure during gestation and lactation on the hepatic system of Wistar rat pups.
• To test the hypothesis that lead exposure during these sensitive periods alters normal liver function in neonates.
• To identify specific biochemical alterations in the liver and blood of lead-exposed pups.

Main Methods:

• Wistar rats were administered lead acetate (300 mg/L) in drinking water during gestation and lactation.
• Pups were analyzed at postnatal days 12 and 21, with blood and liver samples collected.
• Biochemical parameters including hemoglobin, iron, phosphatases, protein, DNA, lipids, glycogen, and blood lead levels were measured.

Main Results:

• Lead-intoxicated pups showed decreased hemoglobin, iron, alkaline phosphatase, and acid phosphatase levels.
• Elevated blood lead (PbB) levels were observed in exposed pups.
• Hepatic protein, DNA, lipid content, and glycogen were reduced, with increased blood glucose levels.

Conclusions:

• Maternal lead exposure during gestation and lactation induces significant biochemical alterations in the neonatal hepatic system.
• Despite no observed histological changes, lead intoxication negatively impacts key metabolic functions in developing rat livers.
• These findings confirm that gestational and lactational lead exposure adversely affects the hepatic system of neonates and pups.