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Related Experiment Video

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Measuring Ascending Aortic Stiffness In Vivo in Mice Using Ultrasound

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Published on: December 2, 2014

Age effect on human aortic valvular glycoproteins.

Małgorzata Przybyło¹, Ewa Stepień, Roman Pfitzner

¹Department of Glycoconjugate Biochemistry, Institute of Zoology, Jagiellonian University, Kraków, Poland. kloc@zuk.iz.uj.edu.pl

Archives of Medical Research

|June 15, 2007

Summary

Human aortic valve protein glycosylation changes with age. Specific sugar modifications like sialylation and fucosylation varied, indicating age-related alterations in these important cardiovascular proteins.

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Area of Science:

Biochemistry
Cardiovascular Biology
Proteomics

Background:

Hemodynamic studies of the aortic valve are common.
Posttranslational modification of human aortic valve proteins remains understudied.
Investigating age-related changes in aortic valve protein glycosylation is crucial.

Purpose of the Study:

To investigate age-related changes in human aortic valve protein composition.
To analyze alterations in the glycosylation patterns of aortic valve proteins with increasing age.

Main Methods:

Aortic valves from male cadaveric donors were grouped by age (21, 30, 41, 51 years).
Proteins were separated using SDS-PAGE and transferred to PVDF membranes.
Eight specific lectins were used to identify monosaccharide and oligosaccharide moieties.

Main Results:

No age-related changes were observed in the overall protein profile via SDS-PAGE.
Protein sialylation, tri/tetraantennary complex glycans, terminal galactose, and polylactosaminyl units increased with age.
Protein fucosylation decreased with age, while high-mannose/hybrid glycans increased in older groups.

Conclusions:

Glycosylation patterns of human aortic valve proteins are significantly associated with donor age.
These findings highlight age-dependent modifications in aortic valve protein structure.