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:4/28/2017)... , ... April 28, 2017 , ... ... expanded distribution of the GlycoMark test throughout the Northeast U.S. , GlycoMark ... patients with diabetes. The GlycoMark test provides a clinically proven one- to two-week ...
(Date:4/28/2017)... ... 2017 , ... Children and adolescents who enter the foster ... in the general population. That’s because foster care is designed to protect children ... no fault of their own, youth who have experienced trauma often have difficulty ...
(Date:4/28/2017)... ... April 28, 2017 , ... Bill Howe started his sewer and drain company ... Tina Howe joined the team, the Bill Howe brand was born and they began ... and giving back to the San Diego community in which they worked, lived and ...
(Date:4/28/2017)... ... April 28, 2017 , ... Woolsy Corporation ... supplements, through its Nova Skin Sciences division, recently announced the launch of Allumière ... with the power of an anti-aging concentrate. , Anogeissus Leiocarpa Bark ...
(Date:4/27/2017)... ... April 27, 2017 , ... ... respiratory hospital, based in Denver, Colorado, announced an agreement to create the Jane ... continuing support of the Jane and Leonard Korman Family Foundation. The collaboration leverages ...
Breaking Medicine News(10 mins):
(Date:4/19/2017)... , Tenn. and DALLAS , April 19, ... Inc., announced that the first patients in ... EndoStim device in the Lower Esophageal Sphincter Stimulation for ... minimally-invasive implantable device designed to provide long-term reflux control ... GERD affects nearly 65 million people in ...
(Date:4/19/2017)... 19, 2017 Companion ... response in pets such as canine, avian and ... various types such as Attenuated Live Vaccines, Conjugate ... Vaccines and Recombinant Vaccines. Attenuated live vaccines are ... bacteria, which have been weakend under laboratory conditions. ...
(Date:4/19/2017)... , April 19, 2017  SARES•REGIS Group leased ... is developing at Conejo Spectrum Business Park in ... Atara Biotherapeutics, Inc. , a biopharmaceutical company ... life-threatening diseases that have been underserved by scientific ... therapies for cancer, autoimmune and infectious disease. ...
Breaking Medicine Technology: