A randomized, placebo-controlled Phase 1 clinical trial of two monoclonal antibodies (mAbs) directed against the coronavirus that causes Middle East respiratory syndrome (MERS) found that they were well tolerated and generally safe when administered simultaneously to healthy adults. The experimental mAbs, REGN3048 and REGN3051, target the MERS coronavirus (MERS CoV) spike protein used by the virus to attach to and infect target cells. The mAbs were discovered and developed by scientists at the biopharmaceutical company Regeneron, located in Tarrytown, New York. The trial was sponsored by the National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health.
The trial was the first to test the experimental antibodies Hyperlink Code in people. Conducted at WCCT Global, a clinical trial site in California, the study enrolled 48 healthy adults, 36 of whom received the mAbs. All volunteers were followed for 121 days after receiving mAbs (or placebo) by intravenous infusion. No serious adverse events occurred.
In preclinical studies, investigators at Regeneron and the University of Maryland, College Park, also administered REGN3048 and REGN3051 sequentially and in combination to genetically modified mice that, unlike wild-type mice, can be infected with MERS CoV…