Hemodialysis vascular access dysfunction: from pathophysiology to novel therapies

Area of Science:

• Vascular Surgery
• Nephrology
• Biomedical Engineering

Background:

• Hemodialysis vascular access dysfunction is a significant clinical issue, causing morbidity and hospitalization.
• Venous neointimal hyperplasia leading to stenosis is the primary cause of hemodialysis graft failure.
• Current therapeutic options for venous stenosis in dialysis grafts are limited.

Purpose of the Study:

• To review the pathogenesis and pathology of venous stenosis in dialysis access grafts.
• To discuss novel therapeutic interventions for preventing graft failure due to venous stenosis.
• To highlight polytetrafluoroethylene (PTFE) grafts as a model for testing local therapies against neointimal hyperplasia.

Main Methods:

• Literature review of pathogenesis and pathology of venous stenosis.
• Review of current and emerging therapeutic strategies for dialysis access dysfunction.
• Analysis of PTFE grafts as a model for neointimal hyperplasia research.

Main Results:

• Venous neointimal hyperplasia is the key pathological process leading to graft stenosis and failure.
• No current effective therapies exist for this condition, highlighting a critical unmet need.
• PTFE grafts offer a suitable platform for evaluating local anti-hyperplastic therapies.

Conclusions:

• Understanding the pathogenesis of venous stenosis is crucial for developing effective treatments.
• Novel local therapies targeting neointimal hyperplasia are needed to improve hemodialysis access outcomes.
• PTFE grafts represent a promising model for preclinical testing of these interventions.