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[Increased hepatocyte resistance to CC14 following the stimulation of rats with a bacterial polysaccharide]
Abstract:
It has been established in male Wistar rats that the uptake capacity of the reticuloendothelial system (RES) increased 5-fold 1, 3 and 7 days after prodigiozan administration (50 micrograms). This was linked with the increased hepatocyte resistance to CCl4 which reached a maximum 7 and 21 days after RES stimulation. As compared with non-stimulated animals, the resistance increase looked as a 2.7- and 3.5-fold shrinkage of the necrotic zones in the central parts of liver lobules 24 h after CCl4 poisoning and less increment of alanine aminotransferase activity in blood serum (3.5- and 3.3-fold decrease, respectively). The increased resistance continued being recordable throughout a month after prodigiozan treatment.
Insights
Prodigiozan administration significantly boosts the reticuloendothelial system (RES) in rats, enhancing liver cell resistance to carbon tetrachloride (CCl4) poisoning. This protective effect on the liver lasts for at least one month.
Area of Science:
- Pharmacology
- Toxicology
- Immunology
Background:
- The reticuloendothelial system (RES) plays a crucial role in immune surveillance and clearance.
- Hepatocyte resistance to toxins like carbon tetrachloride (CCl4) is vital for liver health.
Purpose of the Study:
- To investigate the effect of prodigiozan on RES activity.
- To determine if prodigiozan-induced RES stimulation enhances hepatocyte resistance to CCl4 toxicity.
Main Methods:
- Male Wistar rats were administered prodigiozan (50 micrograms).
- RES uptake capacity was measured at 1, 3, and 7 days post-administration.
- Hepatocyte resistance to CCl4 was assessed by measuring necrotic zones and alanine aminotransferase (ALT) activity in blood serum.
Main Results:
- Prodigiozan administration led to a 5-fold increase in RES uptake capacity.
- Hepatocyte resistance to CCl4 peaked at 7 and 21 days post-stimulation.
- A significant reduction in liver necrotic zones (2.7- to 3.5-fold) and ALT activity (3.3- to 3.5-fold) was observed in treated rats.
- Enhanced resistance persisted for up to one month.
Conclusions:
- Prodigiozan effectively stimulates RES activity in rats.
- RES stimulation by prodigiozan confers significant, long-lasting protection to hepatocytes against CCl4-induced injury.