Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

First patients receive lab-grown blood vessels from donor cells

28.06.2011
For the first time, blood vessels created in the lab from donor skin cells were successfully implanted in patients. Functioning blood vessels that aren't rejected by the immune system could be used to make durable shunts for kidney dialysis, and potentially to improve treatment for children with heart defects and adults needing coronary or other bypass graft surgery.

For the first time, human blood vessels grown in a laboratory from donor skin cells have been successfully implanted into patients, according to new research presented in the American Heart Association's Emerging Science Series webinar.

While more testing is needed, such "off-the-shelf" blood vessels could soon be used to improve the process and affordability of kidney dialysis.

"Our approach could allow hundreds of thousands of patients to be treated from one master cell line," said study lead author Todd N. McAllister, Ph.D., co-founder and chief executive officer of Cytograft Tissue Engineering Inc., of Novato, Calif.

The grafts also have the potential to be used in lower limb bypass to route blood around diseased arteries, to repair congenital heart defects in pediatric patients and to fix damaged arteries in soldiers, who might otherwise lose a limb, said McAllister.

The tissue-engineered blood vessels, produced from sheets of cultured skin cells rolled around temporary support structures, were used to create access shunts between arteries and veins in the arm for kidney dialysis in three patients. These shunts, which connect an artery to a vein, provide access to the blood for dialysis. The engineered vessels were about a foot long with a diameter of 4.8 millimeters.

At follow-up exams up to eight months after implantation, none of the patients had developed an immune reaction to the implants, and the vessels withstood the high pressure and frequent needle punctures required for dialysis. Shunts created from patients' own vessels or synthetic materials are notoriously prone to failure.

Investigators previously showed that using vessels individually created from a patient's own skin cells reduced the rate of shunt complications 2.4-fold over a 3-year period. The availability of off-the-shelf vessels could avoid the expense and months-long process involved in creating custom vessels for each patient, making the technique feasible for widespread use.

Besides addressing a costly and vexing problem in kidney dialysis, off-the-shelf blood vessels might someday be used instead of harvesting patients' own vessels for bypass surgery. A larger, randomized trial of the grafts is under way for kidney dialysis, and human trials have been initiated to assess the safety and effectiveness of these grafts for lower-limb bypass.

The study will be presented in the American Heart Association's Emerging Science Series, which will be held at 1 p.m. EDT/ 12 p.m. CDT. The series is a free online webinar presentation of cutting-edge science. The Emerging Science Series provides a new venue for presenting the latest cardiovascular scientific breakthroughs several times a year, when the discoveries are ready to be presented rather than waiting for a regularly scheduled meeting. Each study is handled in a peer-reviewed process similar to late-breaking clinical trials presented at AHA's annual Scientific Sessions.

The series will include the first presentation of data from clinical trials, basic science, key updates of previously presented trials and major bench-to-bedside breakthroughs. The webinar will be viewable from a computer or mobile phone and attendees can post questions electronically before or after the event. Presentations will be archived for on-demand viewing. For registration and information about the series visit: http://my.americanheart.org/professional/Sessions/AdditionalMeetings/EmergingScienceSeries/New-Emerging-Science-Series_UCM_424613_Article.jsp

Co-authors are Wojciech Wystrychowski, M.D.; Lech Cierpka, M.D.; Krzysztof Zagalski, M.D.; Sergio A. Garrido, M.D.; Samuel Radochonski, B.S.; Nathalie Dusserre, Ph.D.; and Nicholas L'Heureux, Ph.D.

Author disclosures are on the abstract. Cytograft funded the study.

Additional Resources:

Kidney Disease and Diabetes
What is Coronary Bypass Surgery?
Care and Treatment for Congenital Heart Defects
Statements and conclusions of study authors published in American Heart Association scientific meetings or presentations are solely those of the study authors and do not necessarily reflect the association's policy or position. The association makes no representation or guarantee as to their accuracy or reliability. The association receives funding primarily from individuals; foundations and corporations (including pharmaceutical, device manufacturers and other companies) also make donations and fund specific association programs and events. The association has strict policies to prevent these relationships from influencing the science content. Revenues from pharmaceutical and device corporations are available at www.americanheart.org/corporatefunding.

Carrie Thacker | EurekAlert!
Further information:
http://www.heart.org

Further reports about: Cytograft Science TV Tissue Engineering blood vessel heart defect skin cell

More articles from Health and Medicine:

nachricht Laser activated gold pyramids could deliver drugs, DNA into cells without harm
24.03.2017 | Harvard John A. Paulson School of Engineering and Applied Sciences

nachricht What does congenital Zika syndrome look like?
24.03.2017 | University of California - San Diego

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

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

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Argon is not the 'dope' for metallic hydrogen

24.03.2017 | Materials Sciences

Astronomers find unexpected, dust-obscured star formation in distant galaxy

24.03.2017 | Physics and Astronomy

Gravitational wave kicks monster black hole out of galactic core

24.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>