Navigation Links
Researchers prolong the plasma half-life of biopharmaceutical proteins
Date:9/21/2009

Many biopharmaceuticals comprise small proteins that are quickly eliminated from the body. Scientists at the Technische Universitaet Muenchen (TUM) combine such small proteins with a kind of molecular balloon that swells and thus prolongs the half-life of the proteins in the body. The TUM spin-off XL-protein GmbH has now started to further develop this new technology with blockbuster potential.

People who suffer from hepatitis B are often treated with the tissue hormone interferon. However, there is a problem: Interferon is a very small protein, which is filtered from the blood via the kidneys after only a short time. For the patient this means a high-dose injection every other day to keep the effect of the substance from wearing off prematurely.

However, interferon stays in the body much longer when chemically coupled with a synthetic PEG (polyethylene glycol) molecule. PEG is a random coil long-chain polymer string that swells by adsorbing water. That way the PEG molecule becomes large enough that it does not fit through the fine pores of the kidneys the attached interferon remains in the circulatory system longer, and the patient will need an injection only every one to two weeks.

Using genetic engineering, TU Muenchen scientist Prof. Arne Skerra and his coworkers from the Chair of Biological Chemistry at the Center for Life and Food Sciences Weihenstephan have now developed an amino acid string that tangles up similarly to PEG and also swells in the presence of water. However, unlike many PEG compounds, there is no danger of this biological polymer accumulating in the body. In fact over an extended period of time it is discharged or biologically broken down. That happens because this amino acid string (polypeptide) consists of three of the 20 naturally occurring amino acids: proline, alanine and serine, or in short, PAS.

The protein substance interferon, which itself consists of amino acids, can thus be easily generated in "PASylated" form. In first trials with animals, TUM scientists established that PASyated interferon has a half-life in the blood that is prolonged by a factor of 60, which should allow a significant extension of dosing intervals during medicinal therapy.

A further advantage is the simplified biotechnological production: The DNA segments carrying the information for the PAS amino acid sequence and for the interferon can simply be attached to each other and then, for instance, used for transforming bacteria. The bacteria then produce the PASylated interferon in one piece, thus making much fewer production steps necessary in comparison with the chemical coupling of PEG. According to Skerra, "this will lead to a significant drop in production cost."

In principle all small proteins currently used as medication or in development in pharmaceutical companies for example, growth factors or functional antibody fragments can be PASylated. Thus there could be a huge market for the new technology. Consequently, Prof. Skerra and his team initiated the founding of a new biotech company, XL-protein GmbH (http://www.xl-protein.com), which started its operations last spring. "Our technology has the potential to give birth to a whole new generation of blockbuster medications," the TUM biochemist is convinced. Several of the new drugs are already at an advanced stage of preclinical development.


'/>"/>

Contact: Patrick Regan
presse@zv.tum.de
49-892-892-2743
Technische Universitaet Muenchen
Source:Eurekalert

Related biology technology :

1. Researchers improve ability to write and store information on electronic devices
2. Long-awaited international ethical guidelines for biobank researchers
3. CU researchers shed light on light-emitting nanodevice
4. Stevens researchers provide new information about mass spectrometry
5. Researchers measure carbon nanotube interaction
6. Researchers underscore limitations of genetic ancestry tests
7. ASU researchers improve memory devices using nanotech
8. UD researchers race ahead with latest spintronics achievement
9. Researchers outline structure of largest nonvirus particle ever crystallized
10. Ames Laboratory researchers solve fuel-cell membrane structure conundrum
11. Researchers use magnetism to target cells to animal arteries
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/22/2016)... ... May 22, 2016 , ... Doctors in Rome say micronutrients ... asbestos cancer, malignant mesothelioma. Surviving Mesothelioma has just posted an article on the new ... of Rome’s Department of Clinical Sciences and Translational Medicine evaluated more than 150 studies ...
(Date:5/19/2016)... , ... May 19, 2016 , ... Anton Paar USA, ... square foot office building is complete. The new structure adds a third office building ... Anton Paar USA purchased 2.4 acres of land, along with office space adjacent ...
(Date:5/19/2016)... - I dati saranno presentati nel ... ° Congresso della Società Americana di Oncologia ... conclusioni dello studio indicano un tasso di risposta del 56% ... presenta una d urata della risposta (Duration Of Response, ... dei pazienti ha riscontrato un beneficio clinico.      ...
(Date:5/18/2016)... Fort Washington, PA (PRWEB) , ... May 18, ... ... and at least 1,200 hospitalizations are a direct result of asthma complications.* Costing ... health challenge across the country. , “For too many, the ...
Breaking Biology Technology:
(Date:3/31/2016)... RATON, Florida , March 31, 2016 ... LEGX ) ("LegacyXChange" or the "Company") ... for potential users of its soon to be launched ... video ( https://www.youtube.com/channel/UCyTLBzmZogV1y2D6bDkBX5g ) will also provide ... the use of DNA technology to an industry that ...
(Date:3/29/2016)... 2016 LegacyXChange, Inc. (OTC: ... SelectaDNA/CSI Protect are pleased to announce our successful effort ... variety of writing instruments, ensuring athletes signatures against counterfeiting ... from athletes on LegacyXChange will be assured of ongoing ... Bill Bollander , CEO states, "By ...
(Date:3/22/2016)... , March 22, 2016 ... research report "Electronic Sensors Market for Consumer Industry by ... & Others), Application (Communication & IT, Entertainment, ... - Global Forecast to 2022", published by ... is expected to reach USD 26.76 Billion ...
Breaking Biology News(10 mins):