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May Engineering the Next Generation of Cardiovascular Stents
Engineering the Next Generation of Cardiovascular Stents
NUI Galway researcher develops a new bioengineered cardiovascular stent
A new type of cardiovascular stent, coated in antibodies to improve its incorporation into blood vessels, has been developed by scientists and engineers in Ireland and Poland.
Professor Gerard Wall, a microbiologist and investigator of the Science Foundation Ireland Centre for Research in Medical Devices (CÚRAM), based at NUI Galway, led the EU-funded project which has designed and produced a novel stent.
The stent is the first of its kind to use human antibodies for cell capture, to avoid activating the patient’s immune response. The antibodies are isolated in the laboratory using phage display technology, a genetic engineering approach that mimics the human immune system, followed by production in E. coli bacteria for tethering onto the lattice structure of the stent under sterile manufacturing conditions.
Coronary artery disease occurs when the coronary arteries become hardened and narrowed due to the buildup of plaques on their inner walls. This can lead to stenosis, or narrowing of coronary arteries, reducing blood flow to the heart. This is the most common cause of death in Europe, resulting in approximately two million deaths each year.
While surgical insertion of stents to re-open arteries is now commonplace, arteries can become re-blocked over time when cells such as macrophages and smooth muscle cells from the patient’s blood grow over the stent surface.
It is this problem that the new stent design addresses: steel stents produced by the manufacturing partner in Poland are coated with human antibodies, produced in the NUI Galway laboratory, to capture endothelial cells from the patient’s blood and the surrounding artery. This leads to stents becoming rapidly “camouflaged” within the walls of the native blood vessels, enabling them to avoid rejection by the patient’s immune system while providing the mechanical strength necessary to keep the artery open.
Professor Wall, Head of Microbiology and CÚRAM Investigator at NUI Galway, explains: “The prototype stent arises from the combined expertise of stent manufacturers, protein engineers and interventional cardiologists. It has demonstrated its effectiveness in preclinical studies and is now under development by the manufacturer in Poland with a view to reducing restenosis (reoccurrence of a narrowing of a blood vessel) events in patients and improving the long-term outcome of surgical interventions.”
Professor Abhay Pandit, Scientific Director at CÚRAM in NUI Galway, said: “The development of this new cardiovascular stent addresses a critical patient need, which drives all research at CÚRAM. By partnering with leading research institutions in Europe, this unique team brought together a critical skill set to design and produce a real solution that will have a very significant impact for those who urgently need it. The outcome of this partnership is a testament to the power of collaborative research.”
The work, published in the Journal of Biomedical Materials Research, was carried out at NUI Galway, Poland’s Wrocław University of Technology and Wrocław Medical University, and Comenius University in Slovakia, as well as stent manufacturer Balton in Warsaw.
It was funded under the EU’s Marie Curie Industry-Academia Partnerships and Pathways (IAPP) scheme and provided cross-sectoral research training for researchers from the three participating countries.
To read the full piece in Journal of Biomedical Materials Research, visit: https://onlinelibrary.wiley.com/doi/full/10.1002/jbm.b.34380