Navigation Links
Researchers use nanoparticles to deliver treatment for brain, spinal cord injuries
Date:10/1/2008

WEST LAFAYETTE, Ind. - Purdue University researchers have developed a method of using nanoparticles to deliver treatments to injured brain and spinal cord cells.

A team led by Richard Borgens of the School of Veterinary Medicine's Center for Paralysis Research and Welden School of Biomedical Engineering coated silica nanoparticles with a polymer to target and repair injured guinea pig spinal cords. That research is being published in the October edition of the journal Small.

The team then used the coated nanoparticles to deliver both the polymer and hydralazine to cells with secondary damage from a naturally produced toxin. That research was published in August by the journal Nanomedicine.

Borgens' group had previously shown benefits of the polymer polyethylene glycol, or PEG, to treat rats with brain injuries and dogs with spinal cord injuries. PEG specifically targets damaged cells and seals the injured area, reducing further damage. It also helps restore cell function, Borgens said.

In previous studies, PEG was mixed with saline and injected.

"Composition and concentration limited how much PEG we could get to the injury," he said.

"If you change the composition to make the PEG more potent, it produces ethylene glycol, the poison in antifreeze. If you change the concentration of PEG in another way, the solution becomes syrupy and difficult to inject."

So the team - which includes Youngnam Cho of the Center for Paralysis Research, Riyi Shi of the center and Weldon School, and Albena Ivanisevic of Weldon School and the Department of Chemistry - turned to silica nanoparticles.

"These particles are so tiny they can't be seen with a regular microscope. They are about the size of a large virus. So you can inject as many as you need. And they are safe inside bodies," Borgens said.

In the first study, the researchers coated the nanoparticles with PEG to treat guinea pig spinal cord injuries. The treated spinal cord cells showed improved physiological functioning.

In the second study, the researchers added both PEG and hydralazine, an antihypertension drug, to mesoporous silica nanoparticles. These nanoparticles have pores that can hold the drug, which is later delivered to the damaged cells. The hydralazine was added to fight off secondary damage to cells that occurs after the initial injury.

"When cells are injured, they produce natural toxins," Borgens said. "Acrolein is the most poisonous of these toxins. It's an industrial hazard for which hydralazine is an antidote."

Borgens and his team introduced acrolein into cells and then treated the cells with different combinations of hydralazine and/or PEG delivered by the mesoporous silica nanoparticles.

They found that the treatment restored disrupted cell function caused by acrolein.

The team concluded that the use of nanoparticles to deliver both PEG and hydralazine increased the effectiveness of earlier PEG-only treatment by controlling and concentrating release of the drug and the polymer, producing a dual treatment and prolonging the treatment's duration.

The goal of Borgens' research is to improve the quality of life of those who have suffered head or spinal cord injuries.

"All ambulances should have PEG on board," he said. "It can probably save thousands of people from more severe head and spinal damage."


'/>"/>

Contact: Judith Barra Austin
jbaustin@purdue.edu
765-494-2432
Purdue University
Source:Eurekalert

Related medicine news :

1. Researchers create first model for retina receptors
2. Researchers Report Stem Cell Advance
3. ALS Patients and Researchers Unite in Boston for 4th Annual Leadership Summit
4. OHSU Cancer Institute researchers study breathing during radiation
5. Satellite Healthcare Announces 2008 Norman S. Coplon Extramural Grants : Grants Foster Next-Generation Kidney Disease Researchers
6. New leukemia signal could point way to better treatment, Stanford researchers find
7. Penn researchers use honeybee venom toxin to develop a new tool for studying hypertension
8. Johns Hopkins researchers suppress hunger hormone
9. Penn researchers identify natural tumor suppressor
10. Two U.S. Researchers Win Prestigious International Science Award
11. Researchers receive grant to study ways of preventing heart disease
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... ... June 25, 2016 , ... Austin residents seeking Mohs surgery services, can now ... and to Dr. Russell Peckham for medical and surgical dermatology. , Dr. Dorsey brings ... The selective fellowship in Mohs Micrographic Surgery completed by Dr. Dorsey was under the ...
(Date:6/25/2016)... ... ... As a lifelong Southern Californian, Dr. Omkar Marathe earned his Bachelors in ... School of Medicine at UCLA. He trained in Internal Medicine at Scripps Green Hospital ... at the UCLA-Olive View-Cedars Sinai program where he had the opportunity to train in ...
(Date:6/24/2016)... ... June 24, 2016 , ... A recent article ... people are unfamiliar with. The article goes on to state that individuals are now ... of these less common operations such as calf and cheek reduction. The Los Angeles ...
(Date:6/24/2016)... ... June 24, 2016 , ... ... Sessions in Dallas that it will receive two significant new grants to support ... as PHA marked its 25th anniversary by recognizing patients, medical professionals and scientists ...
(Date:6/24/2016)... ... ... Topical BioMedics, Inc, makers of Topricin and MyPainAway Pain Relief Products, join The ‘Business for ... $12 an hour by 2020 and then adjusting it yearly to increase at the same ... wage, assure the wage floor does not erode again, and make future increases more predictable. ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... 23, 2016 Research and Markets ... Market by Type (Organic Chemical (Sugar, Petrochemical, Glycerin), Inorganic ... Coating, Parenteral) - Global Forecast to 2021" report ... The global pharmaceutical excipients market is projected to ... of 6.1% in the forecast period 2016 to 2021. ...
(Date:6/23/2016)... ANGELES , June 23, 2016 ... CAPR ), a biotechnology company focused ... therapeutics, today announced that patient enrollment in its ... in Duchenne) has exceeded 50% of its 24-patient ... enrollment in the third quarter of 2016, and ...
(Date:6/23/2016)... INDIANAPOLIS , June 23, 2016 If ... Leaders Scholarship is any indication, the future is in ... at www.diabetesscholars.org by the Diabetes Scholars Foundation ... the way of academic and community service excellence. ... since 2012, and continues to advocate for people with ...
Breaking Medicine Technology: