Monoclonal Antibody 100% Effective Against Marburg Virus
Colorized electron micrograph of Marburg virus.Dr. Tom Geisbert, University of Texas Medical Branch
Scientists funded by the National Institutes of Health have found that an experimental treatment cured 100 percent of guinea pigs and rhesus monkeys in late stages of infection with lethal levels of Marburg and Ravn viruses, relatives of the Ebola virus. Although the Marburg and Ravn viruses are less familiar than Ebola virus, both can resemble Ebola in symptoms and outcomes in people, and both lack preventive and therapeutic countermeasures.
The study involved giving the animals a therapeutic candidate, MR191-N, which is a monoclonal antibody derived from a person who survived Marburg disease. Monoclonal antibodies are immune system fighters designed to bind to a specific part of an invading virus or bacterium to treat disease. The authors report that two doses of MR191-N were able to confer protection of up to 100 percent when treatment was started up to 5 days post infection. Prior studies of different experimental Marburg treatments involved daily dosing for 7 and 14 days, respectively, with treatment beginning closer to the time of infection.
The study was led by scientists at the University of Texas Medical Branch Galveston National Laboratory and Mapp Biopharmaceutical, Inc., and included collaborators from Vanderbilt University Medical Center, the University of Natural Resources and Life Sciences in Austria, and The Scripps Research Institute. The NIH’s National Institute of Allergy and Infectious Diseases (NIAID) provided project funding.
The researchers are now working with NIAID’s preclinical services group to perform the additional safety testing necessary to advance the monoclonal antibody treatment to initial human clinical studies. Public health workers learned during the 2014-15 Ebola outbreak in West Africa that lack of available treatment options kept diseased and at-risk people away from treatment centers, making disease tracking and outbreak containment more difficult. They fear the same situation would develop in a large-scale Marburg outbreak.
Academic Redesigns FDA-Approved MabThera to Treat ALSNews
Researchers have redesigned a portion of the FDA-apporved MabThera for better-targeted treatment of ALS.READ MORE
Regulatory T Cells Play Essential Role in Hair GrowthNews
UCSF researchers have shown that faulty immune cells may play a role in the development of Alopecia and other forms of baldness.
Liver Fluke Granulin Structural Fold Provides Wound Healing OpportunityNews
Researchers can now mass produce wound-healing peptides isolated from the spit of the human parasitic liver fluke, a worm that causes liver cancer and kills 26,000 people in Thailand each year.READ MORE