Navigation Links
Gene-specific Ebola therapies protect non-human primates from lethal disease

Scientists have developed a successful strategy for interfering with Ebola virus infection that protected 75 percent of nonhuman primates exposed to the lethal disease. This is the first successful antiviral intervention against filoviruses like Ebola in nonhuman primates. The findings could serve as the basis for a new approach to quickly develop virus-specific therapies for known, emerging, and genetically engineered pathogens.

In today's online issue of the journal Public Library of Science Pathogens, a research team led by Sina Bavari and colleagues at the U.S. Army Medical Research Institute of Infectious Diseases (USAMRIID) reports using novel "antisense" drugs to interrupt normal Ebola virus replication. The work was performed in collaboration with AVI BioPharma, a U.S. biotechnology firm.

According to the study's authors, antisense drugs are useful against viral diseases because they are designed to enter cells and eliminate viruses by preventing their replication. The drugs, which act by blocking critical viral genetic sequences, may be more potent than anti-virals such as protease inhibitors, which seek to inhibit a protein needed for viral replication.

Ebola virus causes hemorrhagic fever with case fatality rates as high as 80 percent in humans. The virus, which is infectious by aerosol (although more commonly spread through blood and bodily fluids of infected patients), is of concern both as a global health threat and a potential agent of biological warfare or terrorism. Currently there are no available vaccines or therapies.

"One advantage of this strategy is that it directly targets the virus," said the paper's first author, Kelly L. Warfield. "With Ebola infection, the virus grows so fast that it overtakes the host immune system. What we did, essentially, was to hold off the viral replication long enough for the host to mount an immune response and clear the virus."

Working with a class of compounds known as antisense phosphorodiamidate morpholino oligomers, or PMOs, the team first performed a series of studies to identify PMOs that demonstrated activity against Ebola virus. Next, three of the PMOs were tested in mice, both individually and in combination. The combination of all three was found to be the most effective therapeutic approach in mice, whether the PMOs were administered before or after Ebola infection. Combination therapy was also tested in guinea pigs, where it appeared to be most effective when administered after infection.

To further evaluate the efficacy of the three-PMO combination, four rhesus monkeys were treated with the drug two days prior to Ebola virus exposure. Three of the four were protected from Ebola infection.

"These results, while preliminary, are very encouraging," said Colonel George W. Korch, USAMRIID commander, "especially when you consider that Ebola virus has, to date, been fairly intractable to effective treatment. We look forward to additional findings of success using these PMOs."


'"/>

Source:US Army Medical Research Institute of Infectious Diseases


Related biology news :

1. Study Links Ebola Outbreaks To Animal Carcasses
2. Scientists discover how Ebola virus infects cells
3. Ebola virus: from wildlife to dogs
4. Poaching, logging, and outbreaks of Ebola threaten central African gorillas and chimpanzees
5. Ebola DNA vaccine produces immune responses in all fully vaccinated volunteers in Phase 1 trial
6. Gorilla susceptibility to Ebola virus: the cost of sociality
7. Researchers discover key mechanism by which lethal viruses Ebola and Marburg cause disease
8. Pattern of human Ebola outbreaks linked to wildlife and climate
9. Ebola-outbreak kills 5000 gorillas
10. Ebola outbreaks killing thousands of gorillas and chimpanzees
11. Hopkins AIDS experts issue warning about global efforts to provide drug therapies
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/21/2016)... , January 21, 2016 ... to a new market research report "Emotion Detection and ... Others), Software Tools (Facial Expression, Voice Recognition and ... - Global forecast to 2020", published by MarketsandMarkets, ... expected to reach USD 22.65 Billion by 2020, ...
(Date:1/20/2016)... --  MedNet Solutions , an innovative SaaS-based eClinical technology ... is pleased to announce the attainment of record-setting corporate ... of the company,s laser focus on (and growing international ... comprehensive, easy-to-use and highly affordable cloud-based technology platform. ... growth achievements in 2015 include: , Record ...
(Date:1/18/2016)... Calif. , Jan. 18, 2016  Extenua ... software that simplifies the use and access of ... and go-to-market partnership with American Cyber.  ... brings extensive experience leading transformational C4ISR and Cyber ... and integrating the latest proven technology solutions," said ...
Breaking Biology News(10 mins):
(Date:2/11/2016)... ... February 11, 2016 , ... ... dedicated to delivering cutting-edge information focused on the development and manufacture of ... become a premier sponsor of the 2016 BioProcess International Awards – Recognizing ...
(Date:2/11/2016)... Florida , February 11, 2016 ... PositiveID Corporation ("PositiveID" or "Company") (OTCQB: PSID), a ... announced today that its Thermomedics subsidiary, which markets ... on its growth plan in January 2016, including ... distributors, increasing sequential monthly sales growth, and establishing ...
(Date:2/11/2016)... ... February 11, 2016 , ... Reichert Technologies, ... continues today to pursue the highest level of accuracy and quality with the ... Refractometer and the AR5 Refractometer. Accurate, reliable and tough enough for the ...
(Date:2/11/2016)... ... February 11, 2016 , ... Global Stem Cells ... in Quito, Ecuador. The new facility will provide advanced protocols and state-of-the-art techniques ... the world. , The new GSCG clinic is headed by four prominent ...
Breaking Biology Technology: