Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Computer-Designed Customized Regenerative Heart Valves

14.05.2018

Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.

Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing replacement parts in the laboratory, forms a key part of this research.


Computer-designed customized regenerative heart valve.

Image adapted from figure in publication

The parts can be used to replace defective cells and tissues in the body and restore their normal functioning. The bioengineered replacements have significant advantages over the artificial implants currently in use: They do not cause immune reactions in the patient’s body, and they can grow and regenerate themselves.

Designing heart valves on the computer

An international consortium led by UZH Professor Simon P. Hoerstrup has now reached a milestone on the road towards being able to treat heart patients using new heart valves cultured from human cells: As part of the EU-funded project LifeValve, for the first time the team, using computer simulations, succeeded in individually predicting how well cultured heart valves would grow, regenerate, and function in large animal models (sheep).

“Thanks to the simulations, we can optimize the design and composition of the regenerative heart valves and develop customized implants for use in therapy,” says Hoerstrup of the Institute of Regenerative Medicine at UZH.

Predicting regeneration – an important step towards clinical application

In particular, changes to the structure of the heart valve that occur in the body during the dynamic regeneration process can be predicted by computer simulations and anticipated accordingly in the design.

The results that have now been published in the journal Science Translational Medicine are a significant step towards the routine application of the Zurich-developed tissue engineering technology in the future. Moreover, the findings provide a basic conceptual contribution that will aid the successful transfer to clinical use of new bioengineering technologies in regenerative medicine.

Current prostheses have to be regularly replaced in children

Valvular heart disease is one of the major causes of morbidity and mortality worldwide. Currently available artificial heart valve prostheses are an unsatisfactory solution, in particular for children with congenital heart defects. Children with defective heart valves or blood vessels often have to undergo an operation to have them replaced by prostheses which cannot grow as the child’s body grows.

This means they then require multiple reoperations with an associated increased risk of surgical complications and considerable psycho-social stress for the young patients and their families. Prostheses of animal origin – e.g. from pigs or cows – also wear out with time and have to be replaced. Adult patients could therefore also benefit from regenerative heart valves and blood vessels.

No one-size-fits-all solution

While this field of research is promising and the first clinical uses of heart valves and blood vessels cultured using tissue engineering have already been made, there are still a few hurdles to get over before the technology can be routinely used. “One of the biggest challenges for complex implants such as heart valves is that each patient’s potential for regeneration is different. There is therefore no one-size-fits-all solution”, emphasizes Hoerstrup, whose research team has been among the pioneers of cardiovascular tissue engineering for more than 20 years.

The University Children’s Hospital Zurich is currently preparing a study treating children who have congenital heart defects with tissue engineered blood vessels, developed as part of the LifeMatrix project by Wyss Zurich. Wyss Zurich is a new center run jointly by the University of Zurich and ETH to support the clinical translation of innovative findings into novel medical therapies in the areas of regenerative medicine and robotics.

Literature:
Maximilian Y. Emmert, Boris A. Schmitt, Sandra Loerakker, Bart Sanders, Hendrik Spriestersbach, Emanuela S. Fioretta, Leon Bruder, Kerstin Brakmann, Sarah E. Motta, Valentina Lintas, Petra E. Dijkman, Laura Frese, Felix Berger, Frank P. T. Baaijens, Simon P. Hoerstrup. Computational modeling guides tissue-engineered heart valve design for long-term in vivo performance in a translational sheep model. Science Translational Medicine. May 9, 2018. DOI: 10.1126/scitranslmed.aan4587

Contact:
Prof. Simon P. Hoerstrup, M.D., PhD
Institute of Regenerative Medicine
University of Zurich
Phone +41 44 634 56 25
E-mail: simon.hoerstrup@irem.uzh.ch

Weitere Informationen:

http://www.media.uzh.ch/en/Press-Releases/2018/Regenerative-Heart-Valves.html

Kurt Bodenmüller | Universität Zürich

More articles from Life Sciences:

nachricht TU Bergakademie Freiberg researches virus inhibitors from the sea
27.03.2020 | Technische Universität Bergakademie Freiberg

nachricht The Venus flytrap effect: new study shows progress in immune proteins research
27.03.2020 | Jacobs University Bremen gGmbH

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Junior scientists at the University of Rostock invent a funnel for light

Together with their colleagues from the University of Würzburg, physicists from the group of Professor Alexander Szameit at the University of Rostock have devised a “funnel” for photons. Their discovery was recently published in the renowned journal Science and holds great promise for novel ultra-sensitive detectors as well as innovative applications in telecommunications and information processing.

The quantum-optical properties of light and its interaction with matter has fascinated the Rostock professor Alexander Szameit since College.

Im Focus: Stem Cells and Nerves Interact in Tissue Regeneration and Cancer Progression

Researchers at the University of Zurich show that different stem cell populations are innervated in distinct ways. Innervation may therefore be crucial for proper tissue regeneration. They also demonstrate that cancer stem cells likewise establish contacts with nerves. Targeting tumour innervation could thus lead to new cancer therapies.

Stem cells can generate a variety of specific tissues and are increasingly used for clinical applications such as the replacement of bone or cartilage....

Im Focus: Artificial solid fog material creates pleasant laser light

An international research team led by Kiel University develops an extremely porous material made of "white graphene" for new laser light applications

With a porosity of 99.99 %, it consists practically only of air, making it one of the lightest materials in the world: Aerobornitride is the name of the...

Im Focus: Cross-technology communication in the Internet of Things significantly simplified

Researchers at Graz University of Technology have developed a framework by which wireless devices with different radio technologies will be able to communicate directly with each other.

Whether networked vehicles that warn of traffic jams in real time, household appliances that can be operated remotely, "wearables" that monitor physical...

Im Focus: Peppered with gold

Research team presents novel transmitter for terahertz waves

Terahertz waves are becoming ever more important in science and technology. They enable us to unravel the properties of future materials, test the quality of...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“4th Hybrid Materials and Structures 2020” takes place over the internet

26.03.2020 | Event News

Most significant international Learning Analytics conference will take place – fully online

23.03.2020 | Event News

MOC2020: Fraunhofer IOF organises international micro-optics conference in Jena

03.03.2020 | Event News

 
Latest News

3D printer sensors could make breath tests for diabetes possible

27.03.2020 | Power and Electrical Engineering

TU Bergakademie Freiberg researches virus inhibitors from the sea

27.03.2020 | Life Sciences

The Venus flytrap effect: new study shows progress in immune proteins research

27.03.2020 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>