Peritoneal angiogenesis in response to dialysis fluid

Area of Science:

• Nephrology
• Biomedical Engineering

Background:

• Ultrafiltration failure (UFF) is a common complication in long-term peritoneal dialysis (PD), typically developing after 3-4 years.
• Increased angiogenesis (new blood vessel formation) in the peritoneal membrane is a key feature of UFF, leading to higher small solute transport.

Purpose of the Study:

• To review experimental evidence on factors contributing to angiogenesis in PD.
• To explore the potential of modified peritoneal dialysis fluids (PDF) and other interventions to prevent angiogenesis and UFF.

Main Methods:

• Review of recent experimental studies on PD-related angiogenesis.
• Analysis of the role of peritonitis, inflammation, and PDF composition (glucose, GDP, buffers) in angiogenesis.
• Comparison of angiogenesis in different rat models of PD.

Main Results:

• Peritoneal dialysis fluids (PDF) low in glucose and glucose degradation products (GDP), or using pyruvate as a buffer, may help prevent angiogenesis.
• Low-grade inflammation and peritonitis are significant contributors to angiogenesis.
• Rat models with catheter-based PD show more pronounced neoangiogenesis than those with intraperitoneal injections.

Conclusions:

• Preventing peritonitis is crucial for minimizing angiogenesis in PD.
• Low-GDP PDF formulations are preferable to those containing GDP.
• ACE inhibitors show potential in preventing increased small solute transport in long-term PD, requiring further clinical validation.