Navigation Links
Capsules encapsulated
Date:5/19/2009

This release is available in German.

When cells cannot carry out the tasks required of them by our bodies, the result is disease. Nanobiotechnology researchers are looking for ways to allow synthetic systems take over simple cellular activities when they are absent from the cell. This requires transport systems that can encapsulate medications and other substances and release them in a controlled fashion at the right moment. The transporter must be able to interact with the surroundings in order to receive the signal to unload its cargo. A team led by Frank Caruso at the University of Melbourne has now developed a microcontainer that can hold thousands of individual "carrier units"a "capsosome". As they report in the journal Angewandte Chemie, these are polymer capsules in which liposomes have been embedded to form subcompartments.

Currently, the primary type of nanotransporter used for drugs is the capsule: Polymer capsules form stable containers that are semipermeable, which allows for communication with the surrounding medium. However, these are not suitable for the transport of small molecules because they can escape. Liposomes are good at protecting small drug molecules; however, they are often unstable and impermeable to substances from the environment. The Australian researchers have now combined the advantages of both systems in their capsosomes.

Capsosomes are produced by several steps. First, a layer of polymer is deposited onto small silica spheres. This polymer contains building blocks modified with cholesterol. Liposomes that have been loaded with an enzyme can be securely anchored to the cholesterol units and thus attached to the polymer film. Subsequently, more polymer layers are added and then cross-linked by disulfide bridges into a gel by means of a specially developed, very gentle cross-linking reaction. In the final step, the silica core is etched away without damaging the sensitive cargo.

Experiments with an enzyme as model cargo demonstrated that the liposomes remain intact and the cargo does not escape. Addition of a detergent releases the enzyme in a functional state. By means of the enzymatic reaction, which causes a color change of the solution, it was possible to determine the number of liposome compartments to be about 8000 per polymer capsule.

"Because the capsosomes are biodegradable and nontoxic", says Brigitte Staedler, a senior researcher in the group, "they would also be suitable for use as resorbable synthetic cell organelles and for the transport of drugs." In addition, the scientists are planning to encapsulate liposomes filled with different enzymes together and to equip them with specific "receivers" which would allow the individual cargo to be released in a targeted fashion. This would make it possible to use enzymatic reaction cascades for catalytic reaction processes.


'/>"/>

Contact: Frank Caruso
fcaruso@unimelb.edu.au
61-383-443-461
Wiley-Blackwell
Source:Eurekalert

Related medicine news :

1. Video: CREON(R) (Pancrelipase) Delayed-Release Capsules First and Only Pancreatic Enzyme Product to Receive FDA Approval Under New Guidelines
2. KAPIDEX(TM) (dexlansoprazole) delayed release capsules Now Available for the Treatment of GERD
3. Cipher receives tentative FDA approval for extended-release tramadol capsules
4. Mylan Receives Final FDA Approval for Generic Version of Prilosec(R) Delayed-Release Capsules, 40 mg
5. Tiny capsules deliver
6. Mylans Matrix Receives Final FDA Approval for the Generic Version of the Antiretroviral Zerit(R) Capsules
7. Barr Confirms Patent Challenge of Amrix(R) Extended-Release Capsules, 15mg & 30mg
8. Mylan Receives Final FDA Approval for the Generic Version of the Antidepressant Sarafem(R) Pulvules(R) Capsules
9. Watson Launches Omeprazole Delayed-Release Capsules, 40MG
10. Watson Launches Generic MARINOL(R) Capsules
11. Roxane Laboratories, Inc. Announces the Launch of Ramipril Capsules
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/16/2017)... ... ... Maury Regional Health has announced a large-scale adoption of AccuVein vein visualization ... Regional Medical Center is making vein visualization part of their standard of care. , ... importantly, helps our staff members locate a vein that will provide good access to ...
(Date:8/16/2017)... ... August 16, 2017 , ... A global leader in the treatment ... clinics in all 29 Indian states—bringing the country one step closer to eliminating clubfoot ... the nonprofit organization is on track to enroll 10,000 children in the clubfoot treatment ...
(Date:8/16/2017)... ... , ... Fusion Flix Inc., a Telly Award Winning, Non Profit Corporation has ... viewers in a partnership with the Amazon Video Direct Streaming Distribution Platform. , Their ... Ray disc in 2018. Proceeds will be going to further health research. , ...
(Date:8/16/2017)... (PRWEB) , ... August 16, 2017 , ... TopConsumerReviews.com recently ... Lab Testing . , The healthcare industry in the United States has undergone ... are the days of needing to have a doctor’s order to get a blood ...
(Date:8/16/2017)... , ... August 16, 2017 , ... First Choice ... States, named Dr. Douglas J. Harrison, as the new Medical Director of its Sienna ... new facility Medical Director of our Sienna Plantation location,” said Dr. Michael (Derek) Caraway, ...
Breaking Medicine News(10 mins):
(Date:8/15/2017)... , Aug. 15, 2017  AOTI Inc. announced today that its ... Inc., has recently opened a New York City Office in ... of its unique Topical Wound Oxygen (TWO 2 ) homecare therapy. ... Accreditation Commission for Health Care (ACHC) under the company,s DMEPOS accreditation ... ...
(Date:8/8/2017)... Israel, Aug. 8, 2017  BioLineRx Ltd. (NASDAQ/TASE: BLRX), ... today reports its financial results for the second quarter ... during the second quarter 2017 and to date: ... clinical development programs for the Company,s lead project, BL-8040: ... pivotal study with BL-8040 as novel stem cell mobilization ...
(Date:8/7/2017)... Mich. , Aug. 7, 2017 Diplomat Pharmacy, ... of Joel Saban as president, effective Aug. 7, ... Urick has decided to pursue other interests and will ... "During his tenure, Paul has served us in multiple leadership ... Specialty Pharmacy in Jun. 2015 and has provided decisive, strategic ...
Breaking Medicine Technology: