Fully human antibody that blocks infection from coronavirus SARS-CoV-2 in cells identified

The antibody binds to a domain that is conserved in SARS-CoV-2, neutralizing the virus.

Summary: Researchers have identified a fully human monoclonal antibody that prevents SARS-CoV-2, the virus that causes COVID-19, from infecting cultured cells. The antibody binds to a domain that is conserved in SARS-CoV-2, neutralizing the virus. The findings are an initial step towards developing a fully human antibody to prevent or treat coronavirus.

Source: Utrecht University

Researchers at Utrecht University, Erasmus Medical Center and Harbour BioMed (HBM) reported that they have identified a fully human monoclonal antibody that prevents the SARS-CoV-2 (COVID-19) virus from infecting cultured cells. The discovery, published online in Nature Communications, is an initial step towards developing a fully human antibody to treat or prevent the respiratory disease COVID-19 caused by the novel coronavirus SARS-CoV-2.

The COVID-19 pandemic has spread rapidly across the globe infecting more than 3.3 million people worldwide and killing more than 235,000 people so far.

“This research builds on the work our groups have done in the past on antibodies targeting the SARS-CoV that emerged in 2002/2003,” said Berend-Jan Bosch, Associate Professor, Research leader at Utrecht University, and co-lead author of the Nature Communications study. “Using this collection of SARS-CoV antibodies, we identified an antibody that also neutralizes infection of SARS-CoV-2 in cultured cells. Such a neutralizing antibody has potential to alter the course of infection in the infected host, support virus clearance or protect an uninfected individual that is exposed to the virus.”

This shows covid19
Bosch noted that the antibody binds to a domain that is conserved in both SARS-CoV and SARS-CoV-2, explaining its ability to neutralize both viruses. Image is in the public domain.

Bosch noted that the antibody binds to a domain that is conserved in both SARS-CoV and SARS-CoV-2, explaining its ability to neutralize both viruses. “This cross-neutralizing feature of the antibody is very interesting and suggests it may have potential in mitigation of diseases caused by future-emerging related coronaviruses.”

Potential COVID-19 treatment

“This discovery provides a strong foundation for additional research to characterize this antibody and begin development as a potential COVID-19 treatment,” said Frank Grosveld, PhD. co-lead author on the study, Academy Professor of Cell Biology, Erasmus Medical Center, Rotterdam and Founding Chief Scientific Officer at Harbour BioMed. “The antibody used in this work is ‘fully human,’ allowing development to proceed more rapidly and reducing the potential for immune-related side effects.” Conventional therapeutic antibodies are first developed in other species and then must undergo additional work to ‘humanize’ them. The antibody was generated using Harbour BioMed’s H2L2 transgenic mouse technology.

“This is groundbreaking research,” said Dr. Jingsong Wang, Founder, Chairman & Chief Executive Officer of HBM. “Much more work is needed to assess whether this antibody can protect or reduce the severity of disease in humans. We expect to advance development of the antibody with partners. We believe our technology can contribute to addressing this most urgent public health need and we are pursuing several other research avenues.”

About this coronavirus research article

Source:
Utrecht University
Media Contacts:
Myrna Tinbergen – Utrecht University
Image Source:
The image is in the public domain.

Original Research: Open access
“A human monoclonal antibody blocking SARS-CoV-2 infection”. by Berend-Jan Bosch et al.
Nature Communications doi:10.1038/s41467-020-16256-y

Abstract

A human monoclonal antibody blocking SARS-CoV-2 infection

The emergence of the novel human coronavirus SARS-CoV-2 in Wuhan, China has caused a worldwide epidemic of respiratory disease (COVID-19). Vaccines and targeted therapeutics for treatment of this disease are currently lacking. Here we report a human monoclonal antibody that neutralizes SARS-CoV-2 (and SARS-CoV) in cell culture. This cross-neutralizing antibody targets a communal epitope on these viruses and may offer potential for prevention and treatment of COVID-19.

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