Scientists in the UK have identified a novel bat coronavirus that possesses the ability to enter human cells, a discovery that underscores the continuous threat of viruses crossing from animals to humans. The research, conducted by a team at the University of Glasgow's Centre for Virus Research, involved studying various bat coronaviruses to understand their potential to infect human hosts.
The study, led by Professor David Robertson and Dr. Claire Donald, utilised a pseudovirus system, which is a modified virus that can mimic the entry mechanism of a real virus but cannot replicate or cause disease. This method allowed researchers to safely test how different bat coronaviruses interact with human cells. They found that one particular bat coronavirus exhibited a high efficiency in entering human cells, a critical step for any virus to establish an infection.
While this specific bat coronavirus has not been shown to cause disease in humans, its ability to enter human cells is a significant finding. It suggests that the necessary cellular machinery for infection is present, raising concerns about its potential to adapt further. The findings, which have undergone peer review, build upon existing knowledge regarding the origins of coronaviruses, including SARS-CoV-2, which is widely believed to have originated in bats.
This research is crucial for understanding the evolutionary pathways of coronaviruses and for developing strategies to mitigate future pandemics. It highlights the importance of global surveillance programmes, particularly in regions with high biodiversity and human-animal interfaces, to detect emerging viral threats before they spread widely. The University of Glasgow team emphasised that while the risk of this specific virus causing a human pandemic remains low at present, continuous monitoring is vital.
The work places itself within a broader body of research focused on zoonotic diseases, which are infections that jump from animals to humans. Previous studies have identified numerous coronaviruses in bat populations, some of which share genetic similarities with viruses known to cause human illness. Understanding these viruses' mechanisms of cell entry is a key step in predicting and preventing future outbreaks.