[Enterosorption in experimental acute kidney failure]

Area of Science:

• Nephrology
• Gastroenterology
• Toxicology

Background:

• Bilateral nephrectomy significantly elevates serum creatinine and other waste molecules.
• Intestinal lumen accumulation of these toxins is a consequence of impaired renal excretion.
• Enterosorbents are investigated for their potential to mitigate toxin buildup.

Purpose of the Study:

• To quantify intraluminal creatinine levels in different intestinal segments post-nephrectomy.
• To evaluate the efficacy of the enterosorbent SKN in reducing creatinine and "middle-sized" molecules.
• To determine the optimal intestinal segment for SKN administration.

Main Methods:

• 32 experiments were conducted on 22 male mongrel dogs.
• Creatinine levels were measured in various intestinal segments before and after bilateral nephrectomy.
• The enterosorbent SKN was administered to isolated intestinal portions to assess its impact.

Main Results:

• Post-nephrectomy, creatinine increased 18-fold in the proximal small intestine, 11-fold in the middle, 5-fold in the distal, and 1.4-fold in the large intestine.
• SKN administration showed the most significant reduction in creatinine and "middle-sized" molecules in the proximal small intestine within 6 hours.
• Higher baseline concentrations of serum creatinine and "middle-sized" molecules correlated with increased absorption by SKN.

Conclusions:

• The proximal small intestine is a key site for creatinine and "middle-sized" molecule accumulation after nephrectomy.
• Enterosorbent SKN demonstrates significant efficacy in reducing uremic toxins, particularly in the proximal small intestine.
• SKN's absorption capacity is concentration-dependent, suggesting its utility in managing toxin overload.