Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

First Technology to Remove Prions that Cause vCJD From Blood Launched

30.05.2005


CE Marking of Pall Filter Heralds a New Era in Transfusion Safety

The risk of receiving blood contaminated with variant Cruetzfeldt-Jakob (vCJD) prions may no longer be a concern for the thousands of people who require a transfusion. Pall Corporation (NYSE: PLL) announced today the Council of Europe (CE) marking of its Leukotrap Affinity Prion Reduction Filter System. It is the first and only technology that removes infectious prions that may be the causative agent of vCJD from red cells, the most commonly transfused blood component. Variant CJD, a fatal neurodegenerative disease, is the human form of Bovine Spongiform Encephalopathy (BSE), also known as Mad Cow Disease. The CE mark means the new prion reduction filter meets pan-European essential requirements for safety of medical devices.

"The availability of our prion reduction filter is a seminal event heralding a new era in blood safety," says Eric Krasnoff, Chairman and CEO of Pall Corporation. "We are working very closely with health authorities, starting with the nations hardest hit by vCJD, to help protect the safety of the blood supply and prevent the spread of this insidious disease."



The new prion reduction filter will be evaluated by the United Kingdom (UK) National Blood Service and the Irish Blood Transfusion Service with results expected to be available later this year or in early 2006. Of the 40 million red cells units collected annually across the industrialized world, 2.5 million are collected in the UK and 130,000 in Ireland.

Since the first human case of vCJD was identified in the UK in 1994, there has been a total of 172 cases worldwide in Ireland, France, Italy, the Netherlands, Canada, the United States (US), Japan and Saudi Arabia, with the vast majority (155) in the UK.

Since vCJD can be asymptomatic for about 10 to 16 years, there is no accurate way to determine how many people could currently be harboring the disease or the magnitude of future cases. Variant CJD is transmitted by eating contaminated beef and may also be transmitted by a contaminated blood transfusion.

Dr. Adrianno Aguzzi of the Institute of Neuropathology, University Hospital of Zurich and one of the pre-eminent prion biologists in the world says, "There have been two probable cases of human-to-human vCJD transmission via blood transfusion. Since there are no clinical signs or symptoms of the disease for many years, a proportion of the UK population could be incubating vCJD and acting as blood donors. The most direct action to reduce the risk of transmission may come from new methods to provide prion protection."

Prion Protection

The Leukotrap Affinity Prion Reduction Filter removes all types of prions in addition to leukocytes (white blood cells) from red blood cells. Prions can be either cell-associated (on white blood cells) or non-cell associated. Studies with the new prion filter show that it removes 99.9 percent of the infectious agent from red cells.

A filtration approach to prion protection offers significant advantages over other potential technologies. Filtration is currently an integral part of standard blood processing and handling in the UK and many other countries. This enables easier and more cost effective implementation of the new prion reduction filter into established good manufacturing practices.

Unlike pathogen inactivation, the new filter does not rely on chemical additives, which could damage or compromise the therapeutic value of a blood transfusion such as the oxygen carrying properties of red cells. A filtration approach also avoids the ethical issues associated with diagnostic testing, such as alerting a blood donor that he or she has an invariably fatal disease. Regardless, there are no available diagnostic tests sensitive enough to identify asymptomatic vCJD infected people.

Measures to Safeguard the Blood Supply

Since vCJD emerged, the UK has taken steps to reduce the risk of food-borne infections from consumption of contaminated bovine products.

In 1999, the UK also instituted universal leukocyte reduction of blood to prevent the transmission of cell-associated vCJD prions. The UK also defers donors who have previously received a blood transfusion. Unfortunately, transfusion recipients are often the people most motivated to donate blood.

Other nations around the globe have implemented safeguards similar to those enacted in the UK including leukocyte reduction and donor deferral. Many nations ban blood donations from people who lived or visited countries where BSE infected cattle have been found. These donor deferral measures have put increased pressures on the availability of adequate supply of blood for transfusion. As the donor population becomes even more limited with each additional residency deferral, it further reduces the potential number of people giving blood and can result in serious blood shortages.

Despite all these safeguards, the risk of vCJD transmission via blood transfusion has not been eliminated. There is no cure for vCJD and treatment is palliative to reduce patient suffering.

Janet Gibbs, Chair of the Human BSE Foundation whose daughter died from vCJD says, "Knowing the devastating effect that vCJD can have, the Human BSE Foundation fully supports any innovations that could potentially save anyone from the suffering we had to endure." She also notes that although we should hope for the best, we must prepare for the worst and take every measure available today to safeguard the blood supply.

Pall Corporation developed the Leukotrap Affinity Prion filter to help blood authorities around the world stop the transmission of prions as part of the Company’s mission to ensure the safety of the global blood supply. The adoption of the new prion reduction filter has the potential to support the global need for adequate supplies of safe blood for the benefit of the public health. Pall is continuing its prion research and development program to apply its technologies to meet the specific requirements of each nation throughout Europe, followed by Canada and the US. The Company is also developing an ante mortem test to detect infectious prions in cattle prior to entering the food supply.

Minna Kane | alfa
Further information:
http://www.webershandwick.com

More articles from Health and Medicine:

nachricht Electrical 'switch' in brain's capillary network monitors activity and controls blood flow
27.03.2017 | Larner College of Medicine at the University of Vermont

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

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

Northern oceans pumped CO2 into the atmosphere

27.03.2017 | Earth Sciences

Fingerprint' technique spots frog populations at risk from pollution

27.03.2017 | Life Sciences

Big data approach to predict protein structure

27.03.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>