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New technology delivers sustained release of drugs for up to 6 months
Date:8/13/2012

A new technology which delivers sustained release of therapeutics for up to six months could be used in conditions which require routine injections, including diabetes, certain forms of cancer and potentially HIV/AIDS.

Researchers from the University of Cambridge have developed injectable, reformable and spreadable hydrogels which can be loaded with proteins or other therapeutics. The hydrogels contain up to 99.7% water by weight, with the remainder primarily made up of cellulose polymers held together with cucurbiturils - barrel-shaped molecules which act as miniature 'handcuffs'.

"The hydrogels protect the proteins so that they remain bio-active for long periods, and allow the proteins to remain in their native state," says Dr Oren Scherman of the Department of Chemistry, who led the research. "Importantly, all the components can be incorporated at room temperature, which is key when dealing with proteins which denature when exposed to high heat."

The hydrogels developed by Scherman, Dr Xian Jun Loh and PhD student Eric Appel are capable of delivering sustained release of the proteins they contain for up to six months, compared with the current maximum of three months. The rate of release can be controlled according to the ratio of materials in the hydrogel.

Not only do these hydrogels double the window of content release, they use far less non-water material than current technology. The extra material serves as a type of scaffolding holding the hydrogel together, but it can affect performance of the cargo contained within it, so the less structure-forming material contained within the hydrogel, the more effectively it will perform.

As drug therapy moves away from small molecule drugs toward protein-based therapy, applications such hormone therapy, wound healing and insulin treatment would all be ideal applications for the hydrogels.

For example, more than a quarter of the 2.9 million individuals in the UK who
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Contact: Sarah Collins
sarah.collins@enterprise.cam.ac.uk
44-122-376-0335
Cambridge Enteprise University of Cambridge
Source:Eurekalert

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