Student’s Biochemical Society summer placement in IIB


Christopher Steel exploring the role of proteoglycans and glycosaminoglycans in aortic aneurysm and dissection funded by Biochemical Society supervised by Hannah Davies and Jill Madine

Aortic aneurysm is a bulge in a section of the aorta. This causes weakening of the aortic wall and increased risk of the blood vessel bursting. A number of biochemical factors can complicate the local environment of an aorta which then has a direct consequence on the mechanical function of the vessel. One factor reported to affect the integrity of the vessel wall is the concentration and distribution of proteoglycans (PGs) and glysaminglycans (GAGs), particularly ‘pooling of PGs’ which may compromise the aorta wall and lead to delamination, aortic aneurysm, and dissection.

In his project Chris investigated the levels of PGs and GAGs in human tissue obtained during aortic surgery at Liverpool Heart and Chest Hospital using a range of gel-based techniques and dot-blots and employed immuno-staining to investigate the distribution of GAGs within the medial layer of the aorta wall. Data is being correlated with existing data on biomechanical properties and biochemical composition of collagen and elastin, along with clinical characteristics for the same patients to assess whether PG and GAG distribution could be contributing to altered aortic wall integrity in disease. PGs and GAGs could provide a future therapeutic biomarker to predict risk of aortic disease and rupture.


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