Agents that modulate peritoneal membrane structure and function.

Area of Science:

• Nephrology
• Biomaterials Science
• Pathophysiology

Background:

• Chronic peritoneal dialysis can lead to functional and anatomical changes in the peritoneal membrane due to bioincompatible solutions.
• Conflicting laboratory and clinical findings complicate interpretation due to methodological variations.
• Oxidative stress and inflammation are key pathophysiologic mechanisms involved.

Purpose of the Study:

• To review substances aimed at mitigating insults from peritoneal dialysis solutions.
• To identify promising additives that improve peritoneal membrane function and understanding of pathophysiology.
• To evaluate the impact of novel neutral pH, low glucose degradation product (GDP) solutions.

Main Methods:

• Review of existing laboratory and clinical investigations on peritoneal dialysis solution additives.
• Analysis of substances targeting oxidative stress, inflammation, and solute/water transport.
• Evaluation of recent clinical data on neutral pH, low-GDP peritoneal solutions.

Main Results:

• Many tested peritoneal solution additives have proven ineffective or toxic.
• Certain substances show potential, including those restoring negative charge, improving permselectivity, scavenging oxidants, and inhibiting/breaking advanced glycation end-products.
• Preliminary clinical data on neutral pH, low-GDP solutions are encouraging.

Conclusions:

• Most current peritoneal dialysis solution additives are not beneficial.
• Further research is needed on additives that restore peritoneal function and improve biocompatibility.
• Novel low-GDP solutions may reduce the need for specific scavengers and inhibitors, offering a promising direction.