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Decrease in sulphated glycosaminoglycans in aortic dissection--possible role in the pathogenesis.

P S Gutierrez¹, I C de Almeida, H B Nader

¹Servico de Anatomia Patológica, Instituto do Coração, São Paulo, Brazil.

Cardiovascular Research

|September 1, 1991

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Aortic dissection is linked to reduced sulphated glycosaminoglycans, particularly dermatan and heparan sulphate, weakening the aortic wall. Chondroitin sulphate levels remained unchanged but increased with age.

Area of Science:

Biochemistry
Cardiovascular Research
Extracellular Matrix Biology

Background:

Aortic dissection is a life-threatening condition.
Alterations in the extracellular matrix, specifically sulphated glycosaminoglycans (sGAGs), may contribute to aortic wall weakness.

Purpose of the Study:

To investigate changes in the composition and quantity of sGAGs in human aortic dissection.
To explore the potential relationship between sGAG alterations and aortic wall integrity.

Main Methods:

Aortic tissue samples were obtained from patients with acute aortic dissection and age-matched controls.
Sulphated glycosaminoglycans were quantified using agarose gel electrophoresis and densitometry after enzymatic digestion.

Main Results:

Related Experiment Videos

Total sGAG content was significantly decreased in aortic dissection patients compared to controls.
This reduction was primarily due to lower levels of heparan sulphate and dermatan sulphate.
Chondroitin sulphate levels were similar between groups but showed an age-related increase.

Conclusions:

The observed decrease in sGAGs, particularly dermatan sulphate and heparan sulphate, may compromise aortic wall structure.
This biochemical alteration could contribute to the pathogenesis of aortic dissection.
Further research is needed to elucidate the precise role of sGAGs in aortic wall biomechanics.