Navigation Links
New data obtained on liposomes employed in drug encapsulation and gene therapies
Date:2/8/2011

This release is available in Spanish.

University of Granada scientists and the Spanish Higher Institute for Scientific Research (CSIC) have made significant progress in understanding lipid membranes, which are extensively employed in the development of cosmetic and drug products, and which have potential application in the field of nanotechnology.

Phospholipid vesicles (liposomes) are colloidal systems that arise considerable interest from the pharmaceutical, cosmetic and food industry, since they are biocompatible in protein, nucleic acid, drug, etc encapsulation. Further, from a scientific perspective, liposomes are considered a model system of cell membranes that have been implemented in the study of biological transport processes through cell membranes, as well as in the study of aggregation processes induced by biological substances, etc.

To develop products of biotechnological interest, understanding thoroughly the electrostatic properties of these membranes is necessary. This was the purpose of Alberto Martn Molina and Csar Rodrguez Beas, from the Department of Applied Physics of the University of Granada, and Jordi Faraudo from the Instituto de Ciencias de Materiales in Barcelona (CSIC), authors of a study recently published in the journal Physical Review Letters (Vol. 104; pp 168103 (2010). 104, pp 168103 (2010)).

Inverting its Electrostatic Charge

This study discloses why certain lipid membranes can invert their surface electrostatic charge, that is, why these membranes have negative charge, but they can function as positive charge material in specific circumstances. This type of membranes are extensively employed in gene therapies.

Such behaviour is due to the fact that the interphase of these membranes in water is soft, permeable and highly hydrated. "Such environment attracts small objects with significant electric charge. These membranes tend to gather in large groups acquiring electric charge", researchers state. For the purpose of this study, electrophoresis experiments and computer-based simulations were conducted. Such trials were made using a supercomputer belonging to the Spanish Supercomputing Centre, since these trials required a long time and high calculation performance.

After a sustained period of several months, researchers obtained revealing results from simulations, which allowed them to prepare a new inversion mechanism for their experimental system. This mechanism is as follows: phospholipid membranes have the ability to absorb lanthanum cations, which go from being associated to the solution water molecules to associating to the membrane atoms.


'/>"/>

Contact: Alberto Martn Molina
almartin@ugr.es
34-958-240-025
University of Granada
Source:Eurekalert

Related medicine news :

1. New clue in leukemia mystery: Researchers identify poison employed by deadly enzyme mutations
2. Immigrants with disabilities more frequently employed than US-born persons with disabilities
3. CED Solutions Offers Free 3-Day Technical Windows 7 Certification Course for Unemployed Individuals
4. Generic drug may improve the effectiveness of cancer nanotherapies
5. New Therapies Offer Insight Into Battling Deadly Melanomas
6. Many U.S. Hospices Provide Alternative Therapies: Report
7. Link between signaling molecules could point way to therapies for epilepsy, stroke, other diseases
8. Many Brain Tumor Patients Turn to Alternative Therapies
9. John Theurer Cancer Center presents studies on promising therapies for aggressive blood cancers
10. New therapies and gene target advance the treatment and understanding of hard-to-treat leukemias
11. Alternative therapies may leave asthmatics gasping
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/2/2016)... ... December 02, 2016 , ... The PAINWeekEnd Regional Conference ... and Spa in Honolulu, offering local frontline clinicians the opportunity to extend their ... The demand for supplemental training related to pain management has surged dramatically in ...
(Date:12/2/2016)... (PRWEB) , ... December 02, 2016 , ... Sourced from ... has some unique properties including its unmatched natural purity of just 6 ppm TDS ... and crisp. , Nothing Water has been available in several ShopRite and FoodTown stores ...
(Date:12/2/2016)... ... December 02, 2016 , ... Yisrayl Hawkins, at The ... how this current generation fits into Bible Prophecy. Yisrayl says this generation, known as ... to this conclusion, showing how the details line up exactly with Bible Prophecy – ...
(Date:12/2/2016)... CA (PRWEB) , ... December 02, 2016 , ... ... care journeys, announced today that it has raised $6.0 million in an initial ... by Clarify Health’s conviction that patients and their caregivers can receive far better ...
(Date:12/2/2016)... ... December 02, 2016 , ... ... to build intelligent, connected applications, was named the best Sales Team of 2016 ... winner announcement was made today by the Software & Information Industry Association (SIIA), ...
Breaking Medicine News(10 mins):
(Date:12/2/2016)... -- Allergan plc (NYSE: AGN ), a leading ... announced Accelerated Share Repurchase (ASR) Program. Logo - ... , ... announced, the Company entered into a variable tenor ASR arrangement ... $10 billion of its ordinary shares. Approximately 40.5 million shares ...
(Date:11/30/2016)... , Nov 30, 2016 ... "US Market Overview for Neuromodulation, Neurovascular, Neurosurgical and Monitoring Devices ... ... The full report suite on the ... fluid external drainage systems, intracranial pressure monitoring devices, detachable coils, ...
(Date:11/30/2016)... Nov. 30, 2016 Varian Medical Systems (NYSE: ... America,s Most JUST Company in the Healthcare Equipment and ... magazine,s inaugural "JUST 100 List." The rankings are ... surveys ever conducted on attitudes towards corporate behavior, involving ... list ranks U.S companies against their peers within 32 ...
Breaking Medicine Technology: