Llama antibodies blunt Covid variants in lab trial, says Belgian start-up
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Llama antibodies blunt Covid variants in lab trial, says Belgian start-up

Coronavirus chronicle

Reuters
24 August, 2021, 06:25 pm
Last modified: 24 August, 2021, 06:31 pm

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Llama antibodies blunt Covid variants in lab trial, says Belgian start-up

The antibodies also showed "strong neutralisation activity" against the highly infectious Delta variant

Reuters
24 August, 2021, 06:25 pm
Last modified: 24 August, 2021, 06:31 pm
A llama named Winter is seen in this undated photo released by the VIB-UGent Centre for Medical Biotechnology in Ghent, Belgium on May 2020. VIB-UGent Centre for Medical Biotechnology via Reuters
A llama named Winter is seen in this undated photo released by the VIB-UGent Centre for Medical Biotechnology in Ghent, Belgium on May 2020. VIB-UGent Centre for Medical Biotechnology via Reuters

Llama antibodies could soon be playing a role in the global fight against Covid-19, if clinical trials being conducted by a Belgian biomedical start-up live up to their early promise.

Researchers from Ghent say antibodies extracted from a llama called Winter have blunted the virulence of coronavirus infections, including variants, in VIB-UGent Centre for Medical Biotechnology laboratory testing.

The technology, which would supplement rather than replace vaccines by protecting people with weaker immune systems and treating infected people in hospital, is a potential "game-changer", said Dominique Tersago, chief medical officer of VIB-UGent spin-off ExeVir.

Unusually small, llama antibodies are able to bind to specific part of the virus's protein spike and "at the moment we're not seeing mutations of a high frequency anywhere near where the binding site is," she said.

The antibodies also showed "strong neutralisation activity" against the highly infectious Delta variant, she added.

Researchers expect clinical trials in healthy volunteers, started last week in partnership with Belgian pharmaceutical company UCB, along with those in hospitalised patients, to be similarly effective.

Along with other llamas and members of the camel family, Winter produces versions of conventional antibodies that are smaller, more stable, easier to reproduce and more versatile than those of other mammals, said VIB-UGent group leader Xavier Saelens.

"Their small size... allows them to reach targets, reach parts of the virus that are difficult to access with conventional antibodies," he said.

The search for a Covid-19 treatment follows studies from 2016 into llama antibodies to counter the SARS and MERS coronaviruses. France's Sanofi paid 3.9 billion euros ($4.6 billion) for Ablynx, a Ghent-based medical company that specialises in llama antibody research, in 2018.

Meanwhile Winter, whose antibodies can now be reproduced in the lab, is enjoying retirement in a private art and animal park in Genk.

Top News / World+Biz

Covid-19 Antibody / Llama

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