Lead nitrate and gadolinium chloride administration modify hepatocyte cell surfaces

Area of Science:

• Hepatology
• Toxicology
• Cell Biology

Background:

• Heavy metals like lead nitrate (Pb(NO(3))(2)) can induce significant liver damage, including hyperplasia and apoptosis.
• Gadolinium chloride (GdCl(3)) is known to affect parenchymal cell proliferation and Kupffer cells in the liver.

Purpose of the Study:

• To investigate the effects of Pb(NO(3))(2) and GdCl(3) on hepatocyte cell surface modifications.
• To determine if GdCl(3) administration prior to Pb(NO(3))(2) exposure can mitigate liver damage.

Main Methods:

• Rats were injected with Pb(NO(3))(2) or GdCl(3) alone, or GdCl(3) followed by Pb(NO(3))(2) 24 hours later.
• Hepatocytes were isolated at 1, 3, and 5 days post-treatment via enzymatic liver perfusion.
• Changes in phosphatidylserine (PS) expression, asialoglycoprotein receptors (ASGPRs), and sugar residues on hepatocyte surfaces were quantified alongside apoptosis and proliferation rates.

Main Results:

• Single Pb(NO(3))(2) injection induced liver hyperplasia and apoptosis, leading to cell surface alterations.
• GdCl(3) alone affected parenchymal cell proliferation and Kupffer cell populations.
• Pre-administration of GdCl(3) 24 hours before Pb(NO(3))(2) significantly reduced liver hyperplasia, apoptosis, and subsequent cell surface modifications.

Conclusions:

• Pb(NO(3))(2) and GdCl(3) induce distinct but significant changes in hepatocyte cell surface markers.
• GdCl(3) exhibits a protective effect, preventing or reducing the liver damage induced by Pb(NO(3))(2).
• This suggests GdCl(3) could be a potential therapeutic agent for mitigating heavy metal-induced liver injury.