When barriers fail: the role of endothelial dysfunction in rare pediatric neuromuscular diseases

Area of Science:

• Neurology
• Vascular Biology
• Pediatrics

Background:

• Rare pediatric neuromuscular diseases involve heterogeneous disorders.
• Endothelial dysfunction and blood-tissue barrier alterations contribute to disease progression.
• The blood-nerve barrier (BNB) is crucial for nerve function and integrity.

Purpose of the Study:

• To review current knowledge on endothelial and barrier alterations in rare pediatric neuromuscular diseases.
• To highlight the role of the blood-brain barrier (BBB) and BNB in disease pathophysiology.
• To identify potential diagnostic and therapeutic targets.

Main Methods:

• Literature review of studies on endothelial and barrier function in rare pediatric neuromuscular diseases.
• Analysis of evidence from conditions like Duchenne muscular dystrophy (DMD), spinal muscular atrophy (SMA), Kawasaki Disease (KD), CIDP, and AIDP.
• Focus on the structural and functional similarities and differences between BBB and BNB.

Main Results:

• Endothelial dysfunction and barrier alterations are observed in various rare pediatric neuromuscular diseases.
• Abnormalities in BBB and BNB integrity can lead to inadequate perfusion and neuroinflammation.
• BNB endothelial cells exhibit unique restrictive properties due to higher junctional protein density.

Conclusions:

• Vascular and barrier abnormalities significantly influence disease severity in rare pediatric neuromuscular disorders.
• The precise mechanisms of BNB disruption require further elucidation for several conditions.
• Understanding these processes is vital for developing targeted diagnostic and therapeutic strategies.