Systemic Capillary Leak Syndrome Pathophysiology and Management
Summary
Systemic capillary leak syndrome (SCLS), also known as Clarkson disease, is a rare but potentially life-threatening vascular disorder characterised by sudden, recurrent episodes of plasma and fluid extravasation into the interstitium. Patients present with acute hypotensive shock, severe haemoconcentration and hypoalbuminaemia. Flare-ups often follow infections or idiopathic triggers and result from intrinsic endothelial barrier dysfunction, driven by exaggerated responses to permeability mediators such as vascular endothelial growth factor and histamine. In many cases, monoclonal gammopathy contributes to endothelial instability. Acute management centres on judicious fluid resuscitation to restore intravascular volume and vasopressor support to maintain organ perfusion. Preventative strategies include regular administration of intravenous immunoglobulins, β2-agonists and theophylline to reduce attack frequency. Emerging approaches target the molecular control of interendothelial junctions and nitric oxide signalling to offer precision therapies that strengthen vascular integrity and avert severe leak episodes.
Research from Nature Portfolio
A natural mouse model has elucidated genetic determinants underlying susceptibility to capillary leak. An inbred strain exhibits histamine-induced vascular hyperpermeability and hypotensive shock, mirroring human SCLS episodes. Mapping of this trait to a locus syntenic with a human genomic region implicated in SCLS provides a translational platform to identify candidate genes governing endothelial barrier integrity. This model offers a foundation for preclinical screening of agents aimed at restoring vascular resilience in SCLS and related permeability disorders.
Systemic Capillary Leak Syndrome Pathophysiology and Management publication trend
The graph below shows the total number of articles in systemic capillary leak syndrome pathophysiology and management across all publications each year (not limited to Nature Index journals).
Technical terms
Endothelial barrier: A monolayer of endothelial cells lining blood vessels that regulates fluid and solute exchange between the bloodstream and tissues.
Vascular permeability: The capacity of blood vessel walls to allow the passage of fluid and proteins into surrounding tissue.
Hypotensive shock: A critical condition marked by a severe drop in blood pressure that impairs tissue perfusion.
Haemoconcentration: An increase in the concentration of blood cells and solids due to fluid loss from the circulation.
Hypoalbuminaemia: A lower than normal level of albumin in the blood, reflecting plasma protein loss.
Monoclonal gammopathy: A disorder in which a single clone of plasma cells produces an abnormal immunoglobulin, often associated with SCLS episodes.
References
- Intrinsic endothelial hyper-responsiveness to inflammatory mediators drives acute episodes in models of Clarkson disease. Journal of Clinical Investigation (2024).
- Unlocking endothelial barrier restoration: FX06 in systemic capillary leak syndrome and beyond. Biomedicine & Pharmacotherapy (2024).
- A natural mouse model reveals genetic determinants of systemic capillary leak syndrome (Clarkson disease). Communications Biology (2019).
About these summaries
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