Navigation Links
Plankton inspires creation of stealth armor for slow-release microscopic drug vehicles
Date:1/31/2011

The ability of some forms of plankton and bacteria to build an extra natural layer of nanoparticle-like armour has inspired chemists at the University of Warwick to devise a startlingly simple way to give drug bearing polymer vesicles (microscopic polymer based sacs of liquid) their own armoured protection.

The Warwick researchers have been able to decorate these hollow structures with a variety of nanoparticles opening a new strategy in the design of vehicles for drug release, for example by giving the vesicle "stealth" capabilities which can avoid the body's defences while releasing the drug.

Advances in polymerisation have led to a surge in the creation of vesicles made from polymer molecules. Such vesicles have interesting chemical and physical properties which makes these hollow structures potential drug delivery vehicles.

The University of Warwick team were convinced that even more strength, and interesting tailored properties, could be given to the vesicles if they could add an additional layer of colloidal armour made from a variety of nanoparticles.

Lead researcher on the University of Warwick team Associate Professor Stefan Bon said:

"We took our inspiration from nature, in how it adds protection and mechanical strength in certain classes of cells and organisms. In addition to the mechanical strength provided by the cytoskeleton of the cell, plants, fungi, and certain bacteria have an additional cell wall as outermost boundary. Organisms that particularly attracted our interest were those with a cell wall composed of an armour of colloidal objects for instance bacteria coated with S-layer proteins, or phytoplankton, such as the coccolithophorids, which have their own CaCO3-based nano-patterned colloidal armour"

The Warwick researchers hit on a surprisingly simple and highly effective method of adding a range of different types of additional armour to the polymer based vesicles. One of those armour types was a highly regular packed layer of microscopic polystyrene balls.

This configuration meant the researchers could design a vesicle which had an additional and precise permeable reinforced barrier for drug release, as a result of the crystalline-like ordered structure of the polystyrene balls.

The researchers also succeeded in using the same technique to add a gelatine-like polymer to provide a "stealth" armour to shield vesicles from unwanted attention from the body's immune system while it slowly released its drug treatment.

This particular coating (a poly((ethyl acrylate)-co-(methacrylic acid)) hydrogel) absorbs so much surrounding water into its outer structure that it may be able to fool the body's defence mechanism into believing it is in fact just water.

The Warwick researchers had the idea of simply giving their chosen colloidal particles, or latex, based armour the opposite charge to that of the polymer vesicles, to bind them together. This turned out to be even more effective and easy to manipulate and tailor than they even they had hoped for.

However the researchers needed a new way of actually observing the vesicles to see if their plan had worked. Previous observational methods required researchers to dry out the vesicles before examining then under an electron microscope but this seriously deformed the vesicles and thus provide little useful data. However the University of Warwick had recently acquired a cryo electron microscope thanks to funding from the Science City programme. This allowed the research team to quickly freeze the vesicles to -150 degress centigrade preserving the vesicles shape before observation by the electron microscope. This revealed that the researchers' simple charge based method had worked exactly as planned.


'/>"/>

Contact: Dr.Stefan A. F. Bon
S.bon@warwick.ac.uk
44-247-657-4009
University of Warwick
Source:Eurekalert  

Related medicine news :

1. Prize4Life Inspires Award-winning ALS Film: Trapped
2. Moving closer to outdoor recreation not a recipe for being more physically active
3. Grant will aid creation of interdisciplinary oncology palliative care education program
4. Novel role: EZH2 boosts creation of ovarian cancer blood vessels
5. Research links recreational pool disinfectants to health problems
6. Sex, drugs and moral goals: Penn study of reproductive strategies and recreational drug use
7. Sundial Creations Announces the Debut of SheaMoisture Organic Hair Care Exclusively at Target
8. Swanson Health Products is Looking for Tasty, Healthy Culinary Creations
9. New drug uses stealth to stop cancer cell reproduction
10. Nanoscale stealth probe slides into cell walls seamlessly, say Stanford engineers
11. Toyota Recalls Millions of Defective Vehicles
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Plankton inspires creation of stealth armor for slow-release microscopic drug vehicles
(Date:1/20/2017)... (PRWEB) , ... January 20, 2017 , ... Yisrayl Hawkins, Pastor and Overseer at The ... bible in homes across the world. Yisrayl says this generation is a time like no ... to turn to the Bible. , Yisrayl says he does not want to sound like ...
(Date:1/20/2017)... ... January 20, 2017 , ... Doctor C LLC, a company ... January ECRM trade show to continue the marketing and distribution of its product, The ... for providing 400 percent better absorption than traditional vitamin C supplements. At the trade ...
(Date:1/20/2017)... (PRWEB) , ... January 20, 2017 , ... Lice Troopers, ... lice cases in families with school-aged children since the holiday season. , “It ... holidays with their families, sharing hugs and taking photos, which is the head-to-head gateway ...
(Date:1/20/2017)... FL (PRWEB) , ... January 20, 2017 , ... International ... of nutritional and bodybuilding supplements, announced it attended the January ECRM trade show in ... bodybuilder and nutritional scientist who was determined to create a line of products that ...
(Date:1/20/2017)... California (PRWEB) , ... January 20, 2017 , ... "TransFlare ... to use inside of Final Cut Pro X," said Christina Austin - CEO of ... the RED Dragon. Utilizing the Dragon Sensor,TransFlare 4K Mystique lens flare and light leak ...
Breaking Medicine News(10 mins):
(Date:1/19/2017)... 19, 2017 Incretin Mimetics/GLP-1 Agonists, SNDRIs, Lipase ... The global anti-obesity drugs market is expected to ... the forecast period and CAGR of 38.7% in the second half ... a CAGR of 32.8% from 2016 to 2027. The market is ... $24,063 million in 2027. ...
(Date:1/19/2017)... -- Accuray Incorporated (Nasdaq: ARAY ) announced ... set the bar for excellence in customer satisfaction. The ... rating among radiation treatment delivery systems in the U.S., ... Briefing™. The most recent ratings trend also shows Accuray ... for 11 of the past 12 quarters. ...
(Date:1/19/2017)... LONDON , January 19, 2017 ... Grothey ; European Oncology & Haematology, 2016;12(Suppl 2):3-8; ... ... http://photos.prnewswire.com/prnh/20151014/276718LOGO) Published recently in ... the peer-reviewed journal from touchONCOLOGY, an article by ...
Breaking Medicine Technology: