Featured Research

from universities, journals, and other organizations

Clot-building nanoparticles raise survival rate following blast trauma

Date:
June 30, 2014
Source:
Case Western Reserve University
Summary:
In preclinical tests, artificial platelets, called 'hemostatic nanoparticles,' when injected after blast trauma increased survival rates to 95 percent from 60 percent, and showed no signs of interfering with healing or causing other complications weeks afterward. Explosions account for 79 percent of combat-related injuries and are the leading cause of battlefield deaths.

Spherical hemostatic nanoparticles accumulate on a clot-stabilizing mesh of fibrin the body produces.
Credit: Andrew Shoffstall

A type of artificial platelet being developed to help natural blood platelets form clots faster offers promise for saving the lives of soldiers, as well as victims of car crashes and other severe trauma.

Related Articles


In preclinical tests led by a Case Western Reserve University researcher, the artificial platelets, called "hemostatic nanoparticles," when injected after blast trauma dramatically increased survival rates and showed no signs of interfering with healing or causing other complications weeks afterward.

"The nanoparticles have a huge impact on survival -- not just in the short term, but in the long term," said Erin Lavik, an associate professor of biomedical engineering at Case Western Reserve. Other researchers had raised concerns that the foreign matter would interfere with healing, or form free-floating clots, but "we saw none of that."

The research, published in the Proceedings of the National Academy of Sciences this week, show the survival rate of mice models of blast trauma treated with the nanoparticles increased to 95, compared to 60 percent for those untreated.

Also, no unwanted side effects, such as accumulation of the nanoparticles, clot formation or aberrant healing, were found during examinations one ands three weeks after the injection.

Lavik worked with Margaret M. Lashof-Sullivan, Erin Shoffstall and Kristyn T. Atkins, of Case Western Reserve; Nickolas Keane and Cynthia Bir of Wayne State University and Pamela VandeVord of Virginia Tech.

Explosions account for 79 percent of combat-related injuries and are the leading cause of battlefield deaths, according to researchers at Veterans Affairs hospitals and the federally run Uniformed Services University of the Health Sciences.

The primary blast wave, flying shrapnel and being thrown to the ground cause the lungs, liver, kidneys and other organs to hemorrhage and bleed uncontrollably.

Such uncontrolled bleeding from collisions, blows and falls is also the leading cause of death among victims age 5 to 44 in the United States.

Natural blood platelets are the key ingredient to stopping bleeding, a process called hemostasis. The process works well for typical cuts and scrapes, but can be overwhelmed with serious injuries.

Hospitals try to stem internal bleeding by giving trauma patients blood products or the hemophilia medicine called recombinant factor VIIa, but there isn't a good option for the battlefield or accident scenes. Recombinant factor VIIa must be refrigerated, costs up to tens of thousands of dollars per treatment and can cause clots in brain and spinal cord injuries, which are common from explosions.

Lavik's team has fine-tuned the nanoparticles to increase clotting efficiency. "They are incredibly simple… spheres with arms of peptides that react with activated blood platelets in damaged tissues to help clots form more quickly," she said.

The particles are made from short polymer chains already approved for other uses by the U.S. Food and Drug Administration. In earlier testing, rat models injected with the nanoparticles stopped bleeding faster than untreated models.

The dry particles remained viable after two weeks on a shelf. A medic in the field or an ambulance crew would add saline, shake and inject them, the researchers say.

Further research and testing are underway. Clinical trials on humans are likely at least five years out, Lavik said.


Story Source:

The above story is based on materials provided by Case Western Reserve University. Note: Materials may be edited for content and length.


Journal Reference:

  1. M. M. Lashof-Sullivan, E. Shoffstall, K. T. Atkins, N. Keane, C. Bir, P. VandeVord, E. B. Lavik. Intravenously administered nanoparticles increase survival following blast trauma. Proceedings of the National Academy of Sciences, 2014; DOI: 10.1073/pnas.1406979111

Cite This Page:

Case Western Reserve University. "Clot-building nanoparticles raise survival rate following blast trauma." ScienceDaily. ScienceDaily, 30 June 2014. <www.sciencedaily.com/releases/2014/06/140630164148.htm>.
Case Western Reserve University. (2014, June 30). Clot-building nanoparticles raise survival rate following blast trauma. ScienceDaily. Retrieved March 30, 2015 from www.sciencedaily.com/releases/2014/06/140630164148.htm
Case Western Reserve University. "Clot-building nanoparticles raise survival rate following blast trauma." ScienceDaily. www.sciencedaily.com/releases/2014/06/140630164148.htm (accessed March 30, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Monday, March 30, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

S. Leone in New Anti-Ebola Lockdown

S. Leone in New Anti-Ebola Lockdown

AFP (Mar. 28, 2015) Sierra Leone imposed a three-day nationwide lockdown Friday for the second time in six months in a bid to prevent a resurgence of the deadly Ebola virus. Duration: 01:17 Video provided by AFP
Powered by NewsLook.com
These Popular Antibiotics Can Cause Permanent Nerve Damage

These Popular Antibiotics Can Cause Permanent Nerve Damage

Newsy (Mar. 27, 2015) A popular class of antibiotic can leave patients in severe pain and even result in permanent nerve damage. Video provided by Newsy
Powered by NewsLook.com
WH Plan to Fight Antibiotic-Resistant Germs

WH Plan to Fight Antibiotic-Resistant Germs

AP (Mar. 27, 2015) The White House on Friday announced a five-year plan to fight the threat posed by antibiotic-resistant bacteria amid fears that once-treatable germs could become deadly. (March 27) Video provided by AP
Powered by NewsLook.com
House Ready to Pass Medicare Doc Bill

House Ready to Pass Medicare Doc Bill

AP (Mar. 26, 2015) In rare bipartisan harmony, congressional leaders pushed a $214 billion bill permanently blocking physician Medicare cuts toward House passage Thursday, moving lawmakers closer to resolving a problem that has plagued them for years. (March 26) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins