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New Antibodies for Rare Polio-Like Disease in Children Identified

by Dr. Meenakshy Varier on July 4, 2020 at 11:09 AM
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New Antibodies for Rare Polio-Like Disease in Children Identified

Human monoclonal antibodies that can potentially prevent acute flaccid myelitis (AFM), have been identified. AFM is a rare polio-like respiratory viral disease in children and is linked to a group of respiratory viruses called enterovirus.

The illness, called acute flaccid myelitis (AFM), causes sudden weakness in the arms and legs following a fever or respiratory illness. More than 600 cases have been identified since the U.S. Centers for Disease Control and Prevention began tracking the disease in 2014.

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There is no specific treatment for AFM, which tends to strike in the late summer or early fall and which has been associated with some deaths. However, the disease has recently been linked to a group of respiratory viruses called enterovirus D68 (EV-D68).

Researchers at the Vanderbilt Vaccine Center isolated antibody-producing blood cells from the blood of children who had previously been infected by EV-D68. By fusing the blood cells to fast-growing myeloma cells, the researchers were able to generate a panel of monoclonal antibodies that potently neutralized the virus in laboratory studies.
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Colleagues at Purdue determined the structure of the antibodies, which shed light on how they specifically recognize and bind to EV-D68. One of the antibodies protected mice from respiratory and neurologic disease when given either before or after infection by the enterovirus.

Comments from researchers

"We were excited to isolate potent human antibodies that inhibit this devastating polio-like virus, and these studies will form the basis for taking them forward to clinical trials," Dr. James Crowe, director, Vanderbilt Vaccine Center; Ann Scott Carell Chair and professor of Pediatrics and Pathology, Microbiology and Immunology in the Vanderbilt University School of Medicine.

"Studying infectious disease from a very basic level and applying the results in an animal model of disease is very powerful; hopefully, our studies will translate to a future therapeutic for this disease in children," Richard Kuhn, Purdue's Trent and Judith Anderson Distinguished Professor in Science; Krenicki Family Director, Purdue Institute of Inflammation, Immunology and Infectious Disease.

Source: Eurekalert
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