Featured Research

from universities, journals, and other organizations

Combination Vaccine Protects Monkeys From Ebola And Marburg Viruses

Date:
February 27, 2008
Source:
American Society for Microbiology
Summary:
An experimental, combination vaccine against ebola and Marburg viruses using virus-like particles provides complete protection against infection in monkeys. Traditionally vaccines against viral diseases have consisted of whole viruses, either the one that causes the disease in a weakened or dead state (like the polio vaccine) or a genetically similar virus that does not usually cause disease but elicits a protective immune response. The problem with this approach is there is the risk, however small, of viral reactivation and infection.

An experimental, combination vaccine against Ebola and Marburg viruses using virus-like particles (VLPs) provides complete protection against infection in monkeys.

"VLPs are one of the most promising candidates for protecting humans against Ebola and Marburg virus infections," says Dr. Kelly Warfield, a researcher at USAMRIID who presented the study. They could also be safer than other vaccine candidates.

Traditionally vaccines against viral diseases have consisted of whole viruses, either the one that causes the disease in a weakened or dead state (like the polio vaccine) or a genetically similar virus that does not usually cause disease but elicits a protective immune response. The problem with this approach is there is the risk, however small, of viral reactivation and infection.

"Since the VLP vaccine does not use a whole virus, there is no chance of infection," says Warfield, who notes that some VLP-based vaccines, such as the human papillomavirus (HPV) vaccine, are already on the market.

To create the vaccine, Warfield and her colleagues infected insect cells with specially engineered baculoviruses. The infected cells then produced VLPs for either Marburg or Ebola, depending on the baculovirus, which were then purified. They mixed the two together and vaccinated the monkeys with it.

"Following challenge with Ebola or Marburg virus, all the VLP-vaccinated monkeys survived challenge without clinical or laboratory signs of infection, while the control animals succumbed to the infection," says Warfield. "Based on their safety profile, immunogenicity and protective efficacy, the VLPs are a leading candidate for use as a filovirus vaccine in humans."

Additionally, Warfield discovered that vaccination with one strain of Marburg VLP produced protection against 3 different strains of the virus, which is surprising. Subunit vaccines (in which only part of the virus is used) had previously not been thought to confer broad-based immunity.

Researchers are currently working on scaling up the production process and hope to begin clinical trials in humans in a few years.

Researchers from the U.S. Army Medical Research Institute of Infectious Diseases (USAMRIID) report their results Feb. 26 at the 2008 ASM Biodefense and Emerging Diseases Research Meeting in Baltimore, MD.


Story Source:

The above story is based on materials provided by American Society for Microbiology. Note: Materials may be edited for content and length.


Cite This Page:

American Society for Microbiology. "Combination Vaccine Protects Monkeys From Ebola And Marburg Viruses." ScienceDaily. ScienceDaily, 27 February 2008. <www.sciencedaily.com/releases/2008/02/080226135434.htm>.
American Society for Microbiology. (2008, February 27). Combination Vaccine Protects Monkeys From Ebola And Marburg Viruses. ScienceDaily. Retrieved September 20, 2014 from www.sciencedaily.com/releases/2008/02/080226135434.htm
American Society for Microbiology. "Combination Vaccine Protects Monkeys From Ebola And Marburg Viruses." ScienceDaily. www.sciencedaily.com/releases/2008/02/080226135434.htm (accessed September 20, 2014).

Share This



More Plants & Animals News

Saturday, September 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: San Diego Zoo Welcomes Cheetah Cubs

Raw: San Diego Zoo Welcomes Cheetah Cubs

AP (Sep. 20, 2014) The San Diego Zoo has welcomed two Cheetah cubs to its Safari Park. The nearly three-week-old female cubs are being hand fed and are receiving around the clock care. (Sept. 20) Video provided by AP
Powered by NewsLook.com
Chocolate Museum Opens in Brussels

Chocolate Museum Opens in Brussels

AFP (Sep. 19, 2014) Considered a "national heritage" in Belgium, chocolate now has a new museum in Brussels. In a former chocolate factory, visitors to the permanent exhibition spaces, workshops and tastings can discover derivatives of the cocoa bean. Duration: 01:00 Video provided by AFP
Powered by NewsLook.com
Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. Video provided by Newsy
Powered by NewsLook.com
Jury Delivers Verdict in Salmonella Trial

Jury Delivers Verdict in Salmonella Trial

AP (Sep. 19, 2014) A federal jury has convicted three people in connection with an outbreak of salmonella poisoning five years ago that sickened hundreds of people and was linked to a number of deaths. (Sept. 19) 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:
from the past week

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