Zoloft, an antidepressant that has been on the market since 1991, cured 70 percent of mice that had the virus in their blood.
Researchers have found two drugs that saved the lives of mice infected with the deadly Ebola virus, and you may have them in your medicine cabinet already.
Zoloft, an antidepressant that has been on the market since 1991, cured 70 percent of mice that had the virus in their blood. Vascor, a heart drug that was approved by the U.S. Food and Drug Administration (FDA) in 1990, cured 100 percent of infected mice.
Zoloft and Vascor were just two of about 2,600 drug compounds tested for their ability to disable Ebola viruses and the closely related Marburg virus, according to a report published Wednesday in the journal Science Translational Medicine. Both types of viruses cause hemorrhagic fevers that can be fatal in up to 90 percent of cases.
The current Ebola outbreak in West Africa has killed 11,162 people and sickened 27,181 since claiming its first victim in December 2013.
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Researchers in government labs and pharmaceutical companies have been scrambling to develop new drugs to fight the virus, and while they have come up with several promising candidates, all of them have months or years of testing ahead of them.
A team from the U.S. Army Medical Research Institute of Infectious Diseases, the University of Virginia and Horizon Discovery of Cambridge, Mass., decided to take a different approach. Instead of creating a new drug from scratch, they set out to determine whether an existing drug could be deployed to fight Ebola.
They began with a “library” of 2,635 compounds that included FDA-approved drugs, amino acids, food additives, vitamins and minerals. Each was tested on a version of the Ebola virus that had been engineered to glow green when exposed to ultraviolet light.
A candidate was considered successful if it dulled the green signal by at least 40 percent and also did little or no harm to a sample of uninfected cells derived from the kidneys of African green monkeys.
A total of 171 compounds passed this first round. From this list, the researchers picked 30 that seemed most promising and tested them further in the kidney cells and in human liver cancer cells. They found that 25 of the compounds were able to block Ebola’s entry into cells by more than 90 percent.
For the next round, the researchers picked eight compounds to test in mice. Drug treatment began one hour after the animals were infected with a mouse version of Ebola and continued for up to 10 days.
Three of the compounds had no discernible effect, and all of the mice who got them were dead within eight days. Three other candidates allowed 10 percent, 30 percent and 40 percent of the mice to live for 28 days.
But Zoloft (generic name sertraline) and Vascor (generic name bepridil) had more encouraging results. Of the 10 mice that got Zoloft, seven survived for 28 days. All 10 of the mice treated with Vascor were still alive 28 days after infection. For the sake of comparison, all of the untreated mice that served as controls were dead within nine days.
The two drugs were then tested in cell cultures against a larger group of Ebola and Marburg viruses. Both medications were able to fight all of the viral strains, including the type now circulating in West Africa.