Study links endothelial hyaluronan deficiency to age-related arterial stiffness and endothelial glycocalyx disruption
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Event tier C · Tier ceiling 74 · LONGIFI_SIGNAL_V1
Quick take
Researchers found that reducing endothelial-specific hyaluronan synthase 2 compromises endothelial glycocalyx integrity, causing impaired barrier function and increased large artery stiffness similar to changes seen in natural aging.
What happened
Researchers from the University of Utah investigated the contribution of the endothelial glycocalyx (eGC) and its constituent, hyaluronan (HA), to age-related arterial dysfunction.
The study demonstrated that both endothelial-specific reduction of hyaluronan synthase 2 (HAS2) and natural aging impair eGC integrity, leading to impaired barrier function and reduced eGC thickness in vivo.
Aging was shown to reduce circulating HA levels and increase circulating levels of syndecan-1.
Reduced endothelial HA selectively attenuated flow-induced endothelium-dependent dilation (EDD) and endothelial nitric oxide synthase (eNOS) activation, while preserving agonist-induced EDD in young arteries.
Why it matters
Arterial dysfunction, characterized by impaired endothelial function and increased large artery stiffness, is a hallmark of aging and a driver of cardiovascular disease.
The research links reduced HAS2 expression and advancing age to adverse arterial remodeling, including excessive collagen deposition and reduced elastin content.
These findings establish endothelial HA as a critical driver of eGC integrity and endothelial function, confirming that decreased HA availability directly contributes to age-related arterial stiffness.
Market impact
The discovery of HAS2 and endothelial HA as primary regulators of eGC integrity provides a concrete biochemical pathway for developers of vascular protective therapies.
Biotechnology efforts focusing on extracellular matrix preservation or the prevention of endothelial shedding may look to HAS2 upregulation or eGC-targeted therapies as viable approaches to treat age-related vascular stiffness.
What comes next
Preclinical development of therapies aimed at restoring endothelial HAS2 expression or preventing eGC degradation to observe if they can successfully reverse arterial remodeling and restore flow-induced endothelium-dependent dilation.
Sources
- NCBIPUBMED:LONGEVITY_RESEARCH